v0.9.6

2026-09-01 22:20:10 +02:00
parent 1cb62c8d0b
commit 16e0d94564
47 changed files with 2565 additions and 117 deletions
@@ -633,7 +633,7 @@ dependencies = [

 [[package]]
 name = "gree-controller"
-version = "0.9.5"
+version = "0.9.6"
 dependencies = [
 "aes",
 "aes-gcm",
@@ -1,6 +1,6 @@
 [package]
 name = "gree-controller"
-version = "0.9.5"
+version = "0.9.6"
 edition = "2021"
 authors = ["GREE Controller contributors"]
 description = "Standalone local GREE HVAC controller with Web UI, SQLite and Home Assistant sensor support"
@@ -1,12 +1,14 @@
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@@ -14,9 +16,8 @@ b7f0873109c52be9d7f09bea3dffc416103c50085e1f0680d11661a969479898  ./home-assista
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@@ -24,92 +25,93 @@ cca65482e36d48035aca178121a378fe7d578d600acff267ae81a6399c0da653  ./home-assista
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 45d0cd0ea40b9255bd811362547f5a667dac6bc7324074726130baf60aa41d2b  ./src/protocol/gree/polling.rs
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 55c2d615e76c9e4b08c4067ea734e81d81915144e637f3b51c19bea4fc879137  ./src/protocol/gree/transport.rs
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 f13f1be3d5789539eba3fc1b59c14835f8c681eca7634e118fa3763a53aeee2b  ./src/queries/zone_history.rs
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 b92a6cb158b494fe145b43c7641e65f6fafff47201d7d76edbec2cfd8b94835c  ./systemd/gree-controller.service
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@@ -2,7 +2,7 @@

 Self-hosted controller for GREE-compatible air conditioners with a local Web UI, thermostat zones, schedules, Home Assistant integration, history, notifications and a documented HTTP/WebSocket API.

-**Current release: 0.9.5**
+**Current release: 0.9.6**

 > [Full API reference](docs/API.md) — authentication, every endpoint, request bodies, response models, WebSocket events and examples.

@@ -29,8 +29,9 @@ The interface is intentionally split by responsibility:
 | Devices | Discovery, binding and direct/technical GREE device control. |
 | Zones | Thermostat configuration, profiles, sensors and control ownership. |
 | Groups | Climate group membership plus optional group-level mode/preset/custom-temperature control. Group ON activates member thermostat control; Group OFF powers member units down and releases group ownership so individual thermostats are not left group-blocked. |
-| Schedules | Weekly thermostat schedules and ready-made templates. |
-| Automations | Time/temperature triggered device or group actions. |
+| Flow | Full-screen visual logic editor. Flow is the source of truth and is automatically compiled into generated schedules and automations. |
+| Schedules | Weekly thermostat schedules and ready-made templates, including read-only entries generated by Flow. |
+| Automations | Time/temperature/Flow-triggered device, group or thermostat actions. |
 | History | Overview, zones, devices and HA sensors with precise chart tooltips and zoom. |
 | Simulation | Simulated units for safe testing. |
 | Night mode | Quiet/Sleep/fan limits during an overnight window. |
@@ -202,8 +203,16 @@ Each zone stores separate cooling and heating temperatures for:

 Schedules select profiles or a custom target for selected ISO weekdays (`1=Monday`, `7=Sunday`). Overnight windows are supported. Overlapping enabled schedules for the same zone are rejected.

+### Visual Flow
+
+**Flow** is the authoring layer for combined schedules and automations. The full-screen editor stores a block graph as the source of truth and compiles it automatically: a pure weekday + time-range + thermostat path becomes a native schedule, while richer logic becomes a generated automation. Generated schedule/automation rows carry their Flow provenance and are read-only in the legacy editors.
+
+Available blocks include weekday/time/date ranges, the application Night mode, outdoor/device/zone temperature, house/device/zone/group state, arbitrary Home Assistant state/numeric/attribute/availability checks, a constant diagnostic source, AND/OR/NOT, thermostat actions, direct GREE actions and group actions. The GREE action uses the existing `DeviceCommand` fields (power, mode, target, fan, swing, quiet, turbo, light, air, xfan, health and sleep). Multiple branches can feed an action; the compiled runtime preserves the graph logic.
+
 Quick preset/setpoint overrides normally hand control back at the next schedule boundary. Temporary Quick Thermostat adds explicit start/finish rules such as duration, exact time, temperature reached/stable or next schedule boundary.

+Implementation and concurrency invariants are documented in [`docs/FLOW.md`](docs/FLOW.md).
+
 ## Home Assistant

 There are two independent Home Assistant directions.
@@ -406,3 +415,13 @@ This runs formatting checks, Rust tests, a build and an isolated simulated API s
 ## License

 See [LICENSE](LICENSE).
+
+#### Flow diagnostics, portability and concurrency
+
+Flow reuses the existing thermostat, group and device-control domains instead of maintaining a second HVAC controller. Thermostat actions update the persistent zone intent and wake the normal zone-control engine, so hysteresis, compressor protection, schedule hand-back, Temporary Quick Thermostat and ownership rules remain authoritative. Flow group actions call the existing group controller; direct device actions use the existing automatic-device action path and `DeviceCommand`. A Flow thermostat OFF also performs the existing forced physical OFF transition. Durable thermostat/device transitions are serialized with the thermostat cycle and then use the canonical zone -> device lock order.
+
+The editor supports optimistic revisions, so saving an older copy from another browser/tab returns HTTP 409 instead of overwriting a newer graph. Flow compilation/replacement is serialized with configuration, automation, schedule and thermostat-cycle locks, and generated schedules/automations plus the Flow source are replaced in one SQLite transaction. Runtime condition evaluation happens before the automation execution lock; after acquiring it the rule is reloaded and stale snapshots are discarded. Same-cycle actions claim their target devices deterministically, and Flow/device thermostat writes take the schedule -> thermostat-cycle -> zone -> device path. Home Assistant read failures fail closed instead of making NOT/neq logic accidentally true.
+
+Diagnostics include a non-mutating dry-run endpoint/UI with a selectable simulation time, optional per-block sensor/state overrides, a per-node condition trace and an ownership/block reason. Flow-scoped execution and dry-run events can be viewed from the editor.
+
+Individual Flows can be exported/imported as versioned `gree-controller-flow` JSON. Generated schedules and automations are intentionally excluded from the portable document and are regenerated from the source graph on import. The editor includes reusable templates for workday comfort, weather-aware control, combined AND/OR demand, device-health gating, night group control, a Home Assistant window guard, presence comfort/eco, frost protection, a nested OR+NOT guard and Night-mode-driven quiet control.
@@ -29,6 +29,7 @@ const APP_JS_MODULES: &[&str] = &[
    "bootstrap.js",
    "dashboard.js",
    "entities.js",
+    "flows.js",
    "settings-ui.js",
    "router.js",
    "navigation.js",
@@ -1,6 +1,6 @@
 # GREE Controller API reference

-HTTP and WebSocket API for GREE Controller **0.9.5**.
+HTTP and WebSocket API for GREE Controller **0.9.6**.

 [← Main documentation](../README.md)

@@ -212,7 +212,7 @@ Response:
 {
  "status": "ok",
  "name": "gree-controller",
-  "version": "0.9.5",
+  "version": "0.9.6",
  "uptime_seconds": 1234,
  "control_ready": true,
  "time": "2026-08-30T06:54:00Z"
@@ -236,7 +236,7 @@ Returns the initial Web UI snapshot:
  "settings": {},
  "outdoor_temperature": null,
  "system": {
-    "version": "0.9.5",
+    "version": "0.9.6",
    "uptime_seconds": 1234,
    "auth_required": false,
    "control_ready": true,
@@ -1482,6 +1482,15 @@ curl -H 'Authorization: Bearer gree_controller_RESTRICTED_TOKEN' \
 ```


+
+## Visual Flow API
+
+Flow is the source-of-truth representation for visual schedule/automation logic. `GET /api/flows` lists Flows; `GET /api/flows/:id`, `POST /api/flows`, `PUT /api/flows/:id` and `DELETE /api/flows/:id` manage them. A Flow payload contains `name`, `enabled`, optional `description`, `nodes` and `edges`.
+
+Saving a Flow validates the DAG and compiles it atomically. A thermostat action driven only by one weekday block and one time-range block is emitted as a native schedule when its settings are schedule-compatible. More complex graphs are emitted as Flow-triggered automations. Generated schedules and automations expose `flow_id` / `flow_node_id` and cannot be edited or deleted through their legacy endpoints; edit the owning Flow instead.
+
+Condition blocks support weekday, time/date ranges, application Night mode, outdoor/device/zone temperatures, house/device/zone/group state, and arbitrary Home Assistant state/numeric/attribute/availability sources. Logic blocks support AND, OR and NOT. Action blocks target thermostat zones, GREE devices or climate groups. Direct GREE actions map to the existing `DeviceCommand` fields including fan, swing, quiet, turbo, light, air, xfan, health and sleep; ownership rules may suppress fields that would fight an active thermostat. Flow group actions use the existing group controller and support power, house/heat/cool mode, auto/comfort/sleep/away and the existing custom group target.
+
 ## Compressor protection queue

 Runtime settings expose `compressor_protection_enabled` and `compressor_protection_seconds` (30–1800; default 180). While enabled, thermostat starts and Heat/Cool reversals that fall inside the protection window are represented on the owning zone by `compressor_pending_action`, `compressor_pending_since`, and `compressor_pending_until`.
@@ -1490,3 +1499,17 @@ Runtime settings expose `compressor_protection_enabled` and `compressor_protecti
 - `POST /api/compressor-queue/cancel-all` cancels all currently pending compressor-protection tasks.

 Cancellation suppresses the same pending intent until a new explicit thermostat/group/house command re-arms it, a scheduled Temporary Quick Thermostat session takes ownership, or a different mode/target creates a new intent. Safety OFF commands are not delayed by compressor protection. Direct technical device commands remain immediate manual-control operations.
+
+### Flow portability and diagnostics
+
+`GET /api/flows/:id/export` returns a versioned `gree-controller-flow` JSON document containing only the source graph. Generated schedules/automations are not exported.
+
+`POST /api/flows/import` accepts either that envelope or a direct Flow source payload, creates a new Flow ID/revision, validates it and atomically recompiles outputs.
+
+`POST /api/flows/simulate` accepts `{ flow, flow_id?, at?, overrides?, log? }`. `at` is RFC3339. `overrides` maps Flow node IDs to simulated values. The endpoint validates and compiles the graph, evaluates every action and returns per-node traces plus `matched`, `would_execute` and `blocked_reason` (for example disabled zone/device, manual/local/temporary thermostat ownership, thermostat-output conflict or disabled Flow). It never mutates thermostat/device/group/schedule/automation state. Home Assistant read/attribute/parse failures evaluate safely as false and are visible in the trace instead of accidentally satisfying `NOT`/`neq` logic.
+
+`GET /api/flows/:id/logs?limit=100` returns events associated with the Flow or its generated automations.
+
+Existing Flow updates require `expected_revision`. A mismatched revision returns HTTP 409 to prevent stale editor tabs from overwriting newer graphs. Source Flow plus generated outputs are replaced atomically in one database transaction while configuration/automation/schedule/thermostat-cycle operations are serialized.
+
+Additional Flow condition blocks are `house_mode`, `device_state`, `zone_state`, `group_state`, `night_mode`, `ha_attribute`, `ha_available` and `constant`, alongside weekday/time/date, temperature, Home Assistant state/numeric and AND/OR/NOT blocks. `device_state` can inspect enabled/online/power/mode/fan/swing/quiet/turbo/light/air/xfan/health/sleep state. The editor ships ten editable templates: workday comfort, weather comfort, smart demand, device resilience, night group, HA window guard, presence eco, frost guard, nested guard and night quiet.
@@ -0,0 +1,95 @@
+# Visual Flow architecture
+
+Flow is an authoring/orchestration layer. It does not replace the thermostat, schedule, group or device engines.
+
+## Compilation
+
+- `weekday + time_range -> zone_thermostat` with schedule-compatible settings compiles to a native `Schedule`.
+- Richer DAGs compile to native `Automation` rows with `trigger_kind = "flow"`.
+- Generated rows keep `flow_id` and `flow_node_id` and are read-only in the legacy editors.
+- The Flow source graph plus all of its generated schedule/automation rows are replaced in one SQLite transaction.
+- Flow updates require `expected_revision`; stale editor tabs receive HTTP 409.
+
+## Existing control domains remain authoritative
+
+- `zone_thermostat` writes the existing persistent Zone intent and wakes the normal thermostat cycle.
+- `group_action` calls the existing `control_group` path, including custom group targets.
+- `device_action` uses the existing `DeviceCommand` / automatic-device path.
+- Thermostat hysteresis, compressor protection, schedule hand-back, manual/local ownership and Temporary Quick Thermostat keep their existing priority.
+- GREE fan/quiet/sleep and dry/fan HVAC modes are suppressed on thermostat-assigned devices when they would fight the regulator. Device-only features such as light/turbo/swing/air/xfan/health remain available through the normal command path.
+
+## Concurrency invariants
+
+Structural Flow writes use the global order:
+
+`configuration -> automation -> schedule -> thermostat-cycle`
+
+Thermostat/device actions then use:
+
+`automation -> schedule -> thermostat-cycle -> zone -> device`
+
+Group actions use the existing group order:
+
+`automation -> house -> thermostat-cycle -> group -> zone(s) -> device`
+
+The control loop runs thermostat arbitration and automation arbitration sequentially. Automation execution reloads the row after acquiring the automation lock and skips it when `updated_at` changed. Same-cycle due automations deterministically claim target devices so two rules cannot issue conflicting commands to the same unit in one pass. Polling and physical commands share per-zone/per-device locks.
+
+Holding the automation lock across the physical action is deliberate: Flow cannot be deleted/recompiled while an already-selected action is in flight. Do not shorten this ownership window without adding an explicit execution-generation/token mechanism.
+
+External sensor values can naturally change between condition sampling and action execution. This is normal sampled-control semantics, not a persistent-state race; safety/ownership is rechecked at the action boundary.
+
+## Home Assistant safety
+
+`ha_state`, `ha_numeric`, `ha_attribute` and `ha_available` fail closed. Connection failures, missing attributes and non-numeric numeric states evaluate to `false` and appear as an error object in dry-run traces. This prevents `NOT` / `neq` branches from becoming true merely because Home Assistant is unavailable.
+
+## Diagnostics
+
+The Flow editor exposes:
+
+- dry-run at an arbitrary date/time,
+- per-source overrides,
+- per-node trace,
+- `would_execute` and ownership/block reason,
+- Flow-scoped execution/dry-run logs,
+- import/export of versioned `.flow.json` source graphs.
+
+Dry-run never mutates thermostats, devices, groups, schedules or automations.
+
+## Blocks
+
+Condition/source blocks currently include weekday, time range, date range, application Night mode, outdoor/device/zone temperature, house mode, device state, thermostat/zone state, group state, Home Assistant state/numeric/attribute/availability and a diagnostic constant. Logic blocks are AND, OR and NOT.
+
+Actions include thermostat zone, GREE device and climate group. Direct GREE actions expose power, HVAC mode, target temperature, fan speed, vertical/horizontal swing, quiet, turbo, light, air, xfan, health and sleep.
+
+## Built-in templates
+
+The editor ships editable templates for:
+
+- workday comfort,
+- weather-aware comfort,
+- smart AND/OR demand,
+- device resilience,
+- night group control,
+- Home Assistant window guard,
+- presence comfort/eco,
+- frost protection,
+- nested OR + NOT guard,
+- application Night-mode quiet profile.
+
+## Good next stateful blocks
+
+The next useful additions should be implemented with persisted runtime state rather than pretending they are stateless predicates:
+
+- `for X minutes` / stable-for,
+- debounce,
+- hysteresis block,
+- rising/falling edge,
+- cooldown/rate limit independent of the action,
+- delay/timer,
+- retry/backoff,
+- variables/counters,
+- reusable subflows/macros,
+- explicit priority/mutex groups for actions,
+- trace replay from historical sensor samples.
+
+These need durable state and restart semantics before they should be exposed in the editor.
@@ -1,7 +1,7 @@
 {
  "domain": "gree_controller",
  "name": "GREE Controller",
-  "version": "0.9.5",
+  "version": "0.9.6",
  "config_flow": true,
  "integration_type": "hub",
  "iot_class": "local_polling",
@@ -809,6 +809,139 @@
    "zones.queueSourceGlobal": "Global power",
    "zones.queueRemaining": "Remaining {time}",
    "zones.queueReady": "Ready to execute",
-    "zones.queueCancelAllConfirm": "Cancel all tasks ({count}) waiting for compressor protection?"
+    "zones.queueCancelAllConfirm": "Cancel all tasks ({count}) waiting for compressor protection?",
+    "nav.flows": "Flow",
+    "flow.eyebrow": "Visual logic",
+    "flow.new": "New Flow",
+    "flow.infoTitle": "One place for schedules and automations",
+    "flow.infoText": "Build logic from blocks. GREE Controller translates Flow into generated schedules and automations. Generated entries are read-only outside this editor.",
+    "flow.sourceOfTruth": "Flow = source of truth",
+    "flow.blocks": "Blocks",
+    "flow.defaultDescription": "Visual control logic",
+    "flow.compilesAutomatically": "Automatically translated into schedules and automations",
+    "flow.openEditor": "Open editor",
+    "flow.emptyTitle": "No Flows",
+    "flow.emptyText": "Create your first Flow and build the logic from blocks.",
+    "flow.editorEyebrow": "Flow editor",
+    "flow.namePlaceholder": "Logic name",
+    "flow.paletteHint": "Add a block, then connect its output to the next block.",
+    "flow.time": "Time",
+    "flow.sensors": "Sensors",
+    "flow.logic": "Logic",
+    "flow.actions": "Actions",
+    "flow.emptyCanvas": "Start by adding blocks",
+    "flow.emptyCanvasHint": "Put conditions on the left and actions on the right.",
+    "flow.interpretation": "Interpretation",
+    "flow.selectBlock": "Select a block",
+    "flow.selectBlockHint": "Its settings will appear here.",
+    "flow.newDefaultName": "New logic",
+    "flow.notFound": "Flow not found",
+    "flow.connectHere": "Connect here",
+    "flow.startConnection": "Start connection",
+    "flow.allConditions": "All conditions must match",
+    "flow.operator": "Operator",
+    "flow.state": "State",
+    "flow.value": "Value",
+    "flow.andHint": "AND joins multiple branches. All conditions connected upstream of an action must match.",
+    "flow.blockSettings": "Block settings",
+    "flow.noActionsYet": "Add an action to see the interpreted logic.",
+    "flow.always": "Always",
+    "flow.compileCount": "{schedules} schedules · {automations} automations",
+    "flow.nameRequired": "Enter a Flow name",
+    "flow.saved": "Flow saved and translated into executable logic.",
+    "flow.deleteConfirm": "Delete Flow “{name}” together with its generated schedules and automations?",
+    "flow.deleted": "Flow deleted.",
+    "flow.generated": "Generated by Flow",
+    "flow.generatedReadOnly": "Generated by Flow — edit only in the Flow editor",
+    "flow.anyCondition": "Any condition may match",
+    "flow.invertCondition": "Invert condition",
+    "flow.orHint": "OR is true when at least one connected branch matches.",
+    "flow.notHint": "NOT inverts exactly one connected branch.",
+    "flow.and": "and",
+    "flow.or": "or",
+    "flow.not": "not",
+    "flow.node.weekday": "Weekdays",
+    "flow.node.timeRange": "Time range",
+    "flow.node.dateRange": "Date range",
+    "flow.node.outdoorTemperature": "Outdoor temperature",
+    "flow.node.deviceTemperature": "Device temperature",
+    "flow.node.zoneTemperature": "Zone temperature",
+    "flow.node.haState": "HA: state",
+    "flow.node.haNumeric": "HA: numeric value",
+    "flow.node.and": "AND",
+    "flow.node.or": "OR",
+    "flow.node.not": "NOT",
+    "flow.node.thermostat": "Thermostat",
+    "flow.node.greeDevice": "GREE device",
+    "flow.node.group": "Group",
+    "common.yes": "Yes",
+    "common.no": "No",
+    "common.loading": "Loading…",
+    "flow.import": "Import Flow",
+    "flow.export": "Export",
+    "flow.exported": "Flow exported.",
+    "flow.imported": "Flow imported and compiled.",
+    "flow.importFailed": "Flow import failed",
+    "flow.templates": "Templates",
+    "flow.templateLibrary": "Flow library",
+    "flow.templatesHint": "Ready-made layouts create an editable graph using existing zones, devices and groups.",
+    "flow.templateReplaceConfirm": "Replace the current blocks with this template?",
+    "flow.dryRun": "Dry-run",
+    "flow.logs": "Logs",
+    "flow.testMode": "Flow diagnostics",
+    "flow.simulationTime": "Simulation date and time",
+    "flow.runSimulation": "Run simulation",
+    "flow.dryRunHint": "Dry-run does not change thermostat, device, group, schedule or automation state.",
+    "flow.simulationOverrides": "Sensor overrides",
+    "flow.simulationOverridesHint": "Leave blank to use the current application or Home Assistant state.",
+    "flow.useLiveValue": "live value",
+    "flow.noSimulationOverrides": "This Flow has no sources that need value overrides.",
+    "flow.runningSimulation": "Simulating…",
+    "flow.simulationFailed": "Simulation failed",
+    "flow.compiledPreview": "Compilation: {schedules} schedules · {automations} automations",
+    "flow.wouldExecute": "Action would execute",
+    "flow.blockedByOwnership": "Blocked by ownership",
+    "flow.conditionFalse": "Condition false",
+    "flow.blockReason": "Block reason",
+    "flow.saveBeforeLogs": "Save the Flow first to view its logs.",
+    "flow.noLogs": "No logs for this Flow.",
+    "flow.logsFailed": "Could not load Flow logs.",
+    "flow.attribute": "Attribute",
+    "flow.houseMode": "House mode",
+    "flow.field": "Field",
+    "flow.node.haAttribute": "HA: attribute",
+    "flow.node.houseMode": "House mode",
+    "flow.node.deviceState": "Device state",
+    "flow.node.zoneState": "Thermostat state",
+    "flow.node.constant": "Test constant",
+    "flow.template.workday_comfort.title": "Workday comfort",
+    "flow.template.workday_comfort.description": "Weekday morning comfort preset for the selected thermostat zone.",
+    "flow.template.weather_comfort.title": "Weather-aware comfort",
+    "flow.template.weather_comfort.description": "Combines weekday, time and outdoor temperature with AND before thermostat control.",
+    "flow.template.smart_demand.title": "Smart demand",
+    "flow.template.smart_demand.description": "Complex time, house-mode and outdoor-or-room temperature logic.",
+    "flow.template.device_resilience.title": "Only when device is healthy",
+    "flow.template.device_resilience.description": "Runs the thermostat only when the device is enabled, online and house mode allows operation.",
+    "flow.template.night_group.title": "Night group",
+    "flow.template.night_group.description": "Night time + house mode applies sleep preset to a group or zone.",
+    "flow.template.ha_window_guard.title": "Open window — stop HVAC",
+    "flow.template.ha_window_guard.description": "Home Assistant binary_sensor example: an open window turns the thermostat off. Set the correct entity_id.",
+    "flow.node.groupState": "Group state",
+    "flow.node.nightMode": "Night mode",
+    "flow.nightModeActive": "active according to app settings",
+    "flow.nightModeHint": "This condition is true while the Night mode configured in the app is currently active. Use NOT to match time outside Night mode.",
+    "flow.template.presence_eco.title": "Presence: comfort / eco",
+    "flow.template.presence_eco.description": "Two explicit Home Assistant branches: home enables comfort while not_home selects the away preset. Set the correct person or presence entity_id.",
+    "flow.template.frost_guard.title": "Frost protection",
+    "flow.template.frost_guard.description": "In heating mode, low outdoor and room temperatures select a safe low thermostat target.",
+    "flow.template.nested_guard.title": "Nested OR and NOT guard",
+    "flow.template.nested_guard.description": "Weekdays and time + outdoor OR room temperature + NOT open window. An example of a multi-level graph.",
+    "flow.template.night_quiet.title": "Night group profile",
+    "flow.template.night_quiet.description": "Uses the app Night mode and group state directly to apply the sleep preset.",
+    "flow.node.haAvailable": "HA: availability",
+    "flow.available": "available",
+    "flow.haAvailableHint": "This condition is true only when the Home Assistant entity returns a state other than unknown/unavailable. Connection errors fail closed as false. Useful as a guard before NOT and safety logic.",
+    "flow.deviceOptions": "Advanced GREE options",
+    "flow.deviceOptionsHint": "These fields use the existing DeviceCommand. Fan/quiet/sleep and dry/fan HVAC modes are blocked on a thermostat-assigned device when they would fight the regulator; use the Thermostat action there instead."
  }
 }
@@ -809,6 +809,139 @@
    "zones.queueSourceGlobal": "Zasilanie globalne",
    "zones.queueRemaining": "Pozostało {time}",
    "zones.queueReady": "Gotowe do wykonania",
-    "zones.queueCancelAllConfirm": "Anulować wszystkie oczekujące zadania ({count}) ochrony sprężarki?"
+    "zones.queueCancelAllConfirm": "Anulować wszystkie oczekujące zadania ({count}) ochrony sprężarki?",
+    "nav.flows": "Flow",
+    "flow.eyebrow": "Logika wizualna",
+    "flow.new": "Nowy Flow",
+    "flow.infoTitle": "Jedno miejsce dla harmonogramów i automatyzacji",
+    "flow.infoText": "Układasz logikę z bloków. GREE Controller tłumaczy Flow na generowane harmonogramy i automatyzacje. Wygenerowane wpisy są tylko do odczytu poza tym edytorem.",
+    "flow.sourceOfTruth": "Flow = źródło logiki",
+    "flow.blocks": "Bloki",
+    "flow.defaultDescription": "Wizualna logika sterowania",
+    "flow.compilesAutomatically": "Automatycznie tłumaczone na harmonogramy i automatyzacje",
+    "flow.openEditor": "Otwórz edytor",
+    "flow.emptyTitle": "Brak Flow",
+    "flow.emptyText": "Utwórz pierwszy przepływ i ułóż logikę z bloków.",
+    "flow.editorEyebrow": "Edytor Flow",
+    "flow.namePlaceholder": "Nazwa logiki",
+    "flow.paletteHint": "Dodaj blok, a potem połącz jego wyjście z kolejnym blokiem.",
+    "flow.time": "Czas",
+    "flow.sensors": "Czujniki",
+    "flow.logic": "Logika",
+    "flow.actions": "Akcje",
+    "flow.emptyCanvas": "Zacznij od dodania bloków",
+    "flow.emptyCanvasHint": "Warunki układaj po lewej, akcje po prawej.",
+    "flow.interpretation": "Interpretacja",
+    "flow.selectBlock": "Wybierz blok",
+    "flow.selectBlockHint": "Tutaj pojawią się jego ustawienia.",
+    "flow.newDefaultName": "Nowa logika",
+    "flow.notFound": "Nie znaleziono Flow",
+    "flow.connectHere": "Połącz tutaj",
+    "flow.startConnection": "Rozpocznij połączenie",
+    "flow.allConditions": "Wszystkie warunki muszą być spełnione",
+    "flow.operator": "Operator",
+    "flow.state": "Stan",
+    "flow.value": "Wartość",
+    "flow.andHint": "AND łączy kilka gałęzi. Wszystkie warunki doprowadzone do akcji muszą być spełnione.",
+    "flow.blockSettings": "Ustawienia bloku",
+    "flow.noActionsYet": "Dodaj akcję, aby zobaczyć interpretację logiki.",
+    "flow.always": "Zawsze",
+    "flow.compileCount": "{schedules} harm. · {automations} autom.",
+    "flow.nameRequired": "Podaj nazwę Flow",
+    "flow.saved": "Flow zapisany i przetłumaczony na logikę wykonawczą.",
+    "flow.deleteConfirm": "Usunąć Flow „{name}” razem z wygenerowanymi harmonogramami i automatyzacjami?",
+    "flow.deleted": "Flow usunięty.",
+    "flow.generated": "Wygenerowane przez Flow",
+    "flow.generatedReadOnly": "Wygenerowane przez Flow — edycja tylko w edytorze Flow",
+    "flow.anyCondition": "Wystarczy jeden warunek",
+    "flow.invertCondition": "Odwrócenie warunku",
+    "flow.orHint": "OR zwraca prawdę, gdy spełniona jest co najmniej jedna podłączona gałąź.",
+    "flow.notHint": "NOT odwraca wynik dokładnie jednej podłączonej gałęzi.",
+    "flow.and": "i",
+    "flow.or": "lub",
+    "flow.not": "nie",
+    "flow.node.weekday": "Dni tygodnia",
+    "flow.node.timeRange": "Przedział godzin",
+    "flow.node.dateRange": "Zakres dat",
+    "flow.node.outdoorTemperature": "Temperatura zewn.",
+    "flow.node.deviceTemperature": "Temperatura urządzenia",
+    "flow.node.zoneTemperature": "Temperatura strefy",
+    "flow.node.haState": "HA: stan",
+    "flow.node.haNumeric": "HA: wartość",
+    "flow.node.and": "AND",
+    "flow.node.or": "OR",
+    "flow.node.not": "NOT",
+    "flow.node.thermostat": "Termostat",
+    "flow.node.greeDevice": "Urządzenie GREE",
+    "flow.node.group": "Grupa",
+    "common.yes": "Tak",
+    "common.no": "Nie",
+    "common.loading": "Ładowanie…",
+    "flow.import": "Importuj Flow",
+    "flow.export": "Eksportuj",
+    "flow.exported": "Flow wyeksportowany.",
+    "flow.imported": "Flow zaimportowany i skompilowany.",
+    "flow.importFailed": "Nie udało się zaimportować Flow",
+    "flow.templates": "Presety",
+    "flow.templateLibrary": "Biblioteka Flow",
+    "flow.templatesHint": "Gotowe układy tworzą edytowalny graf z użyciem istniejących stref, urządzeń i grup.",
+    "flow.templateReplaceConfirm": "Zastąpić obecne bloki wybranym presetem?",
+    "flow.dryRun": "Dry-run",
+    "flow.logs": "Logi",
+    "flow.testMode": "Diagnostyka Flow",
+    "flow.simulationTime": "Data i godzina symulacji",
+    "flow.runSimulation": "Uruchom symulację",
+    "flow.dryRunHint": "Dry-run nie zmienia stanu termostatów, urządzeń, grup, harmonogramów ani automatyzacji.",
+    "flow.simulationOverrides": "Nadpisania czujników",
+    "flow.simulationOverridesHint": "Zostaw puste, aby użyć aktualnego stanu aplikacji lub Home Assistant.",
+    "flow.useLiveValue": "aktualna wartość",
+    "flow.noSimulationOverrides": "Ten Flow nie ma źródeł, które wymagają nadpisania wartości.",
+    "flow.runningSimulation": "Symulacja…",
+    "flow.simulationFailed": "Symulacja nie powiodła się",
+    "flow.compiledPreview": "Kompilacja: {schedules} harm. · {automations} autom.",
+    "flow.wouldExecute": "Akcja wykonałaby się",
+    "flow.blockedByOwnership": "Zablokowane przez ownership",
+    "flow.conditionFalse": "Warunek niespełniony",
+    "flow.blockReason": "Powód blokady",
+    "flow.saveBeforeLogs": "Najpierw zapisz Flow, aby zobaczyć jego logi.",
+    "flow.noLogs": "Brak logów dla tego Flow.",
+    "flow.logsFailed": "Nie udało się pobrać logów.",
+    "flow.attribute": "Atrybut",
+    "flow.houseMode": "Tryb domu",
+    "flow.field": "Pole",
+    "flow.node.haAttribute": "HA: atrybut",
+    "flow.node.houseMode": "Tryb domu",
+    "flow.node.deviceState": "Stan urządzenia",
+    "flow.node.zoneState": "Stan termostatu",
+    "flow.node.constant": "Stała testowa",
+    "flow.template.workday_comfort.title": "Komfort w dni robocze",
+    "flow.template.workday_comfort.description": "Pon.–pt. rano uruchamia preset komfortu w wybranej strefie.",
+    "flow.template.weather_comfort.title": "Komfort zależny od pogody",
+    "flow.template.weather_comfort.description": "Łączy dzień, godzinę i temperaturę zewnętrzną przez AND przed sterowaniem termostatem.",
+    "flow.template.smart_demand.title": "Inteligentne zapotrzebowanie",
+    "flow.template.smart_demand.description": "Złożona logika czasu, trybu domu i alternatywy temperatury zewnętrznej lub pokojowej.",
+    "flow.template.device_resilience.title": "Sterowanie tylko przy sprawnym urządzeniu",
+    "flow.template.device_resilience.description": "Uruchamia termostat tylko gdy urządzenie jest włączone, online i tryb domu pozwala na pracę.",
+    "flow.template.night_group.title": "Noc dla grupy",
+    "flow.template.night_group.description": "Nocny przedział czasu + tryb domu sterują presetem sleep dla grupy lub strefy.",
+    "flow.template.ha_window_guard.title": "Otwarte okno — wyłącz HVAC",
+    "flow.template.ha_window_guard.description": "Przykład integracji z binary_sensor Home Assistant: otwarte okno wyłącza termostat. Ustaw właściwy entity_id.",
+    "flow.node.groupState": "Stan grupy",
+    "flow.node.nightMode": "Tryb nocny",
+    "flow.nightModeActive": "aktywny zgodnie z ustawieniami aplikacji",
+    "flow.nightModeHint": "Warunek jest prawdziwy, gdy skonfigurowany w aplikacji Tryb nocny jest aktualnie aktywny. Użyj NOT, aby sprawdzić czas poza trybem nocnym.",
+    "flow.template.presence_eco.title": "Obecność: komfort / eco",
+    "flow.template.presence_eco.description": "Dwie jawne gałęzie Home Assistant: stan home włącza komfort, a not_home ustawia preset away. Ustaw właściwy entity_id osoby lub czujnika obecności.",
+    "flow.template.frost_guard.title": "Ochrona przeciwzamrożeniowa",
+    "flow.template.frost_guard.description": "W trybie grzania, przy niskiej temperaturze zewnętrznej i pokojowej, ustawia bezpieczny niski cel termostatu.",
+    "flow.template.nested_guard.title": "Złożony warunek z OR i NOT",
+    "flow.template.nested_guard.description": "Dni i godziny + temperatura zewnętrzna LUB pokojowa + NOT dla otwartego okna. Przykład wielopoziomowego grafu.",
+    "flow.template.night_quiet.title": "Nocny profil grupy",
+    "flow.template.night_quiet.description": "Korzysta bezpośrednio z istniejącego Trybu nocnego aplikacji i stanu grupy, aby zastosować preset sleep.",
+    "flow.node.haAvailable": "HA: dostępność",
+    "flow.available": "dostępna",
+    "flow.haAvailableHint": "Warunek jest prawdziwy tylko wtedy, gdy encja Home Assistant odpowiada stanem innym niż unknown/unavailable. Błąd połączenia jest traktowany bezpiecznie jako false. Przydatne jako bramka przed NOT i logiką bezpieczeństwa.",
+    "flow.deviceOptions": "Zaawansowane opcje GREE",
+    "flow.deviceOptionsHint": "Te pola używają istniejącego DeviceCommand. Fan/quiet/sleep oraz tryby dry/fan są blokowane dla urządzenia przypisanego do termostatu, gdy mogłyby walczyć z regulatorem; użyj wtedy akcji Termostat."
  }
 }
@@ -1 +0,0 @@
-scripts/regenerate-sha.sh
@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+cd "$(dirname "$0")"
+
+MANIFEST="FILE_MANIFEST.sha256"
+TMP="${MANIFEST}.tmp"
+
+find . -type f \
+  ! -path "./${MANIFEST}" \
+  ! -path "./${TMP}" \
+  ! -path "./.git/*" \
+  ! -path "./target/*" \
+  -print0 \
+  | sort -z \
+  | xargs -0 sha256sum > "$TMP"
+
+mv "$TMP" "$MANIFEST"
+
+sha256sum -c "$MANIFEST"
@@ -0,0 +1,11 @@
+bb89bac237e750e9b1bf73761d7df97a6b81853091615878c03f13d7b6399aa7  ./README.md
+5bc736c7bc76ca80aaa406bb171d2aa91baf4c3aa8695dce0e09b888b6ab3146  ./common.sh
+6403786610ee6d2f628193c25aee0dd058d62e904aa1a31d5f62fdaae0e94b4f  ./configure-gree-network.sh
+14076104c042fba1284ebb07531a6c3ff972df1f9f5b18f70da18ab774efed27  ./generate_ha_migration.py
+e4849261fd9ed1f01df96c0637c439c0c4eff8fa317b2918026167bba343af79  ./install-lxc.sh
+bb7cd2c5b27c9dceec1d1d2846fbad9600df9c08e0ad07d13fcde97af533091c  ./install.sh
+e00d211e3885e30d7fed1e43b44e6fdad40a67019060156c0641816a93e3365f  ./network-debug.sh
+01952aa92b217f8eae2493b88870e2dec595100cd15c4d561ff11ae2b936c46f  ./regenerate-sha.sh
+81345b6a0b51736bdbc98fd23199b62e4c721b4e7437e02dab7ea79b97dff29a  ./service.sh
+d84315307bcda654ca5d23f86ae50723f6d26c0b8046711076d503983c05eaf6  ./smoke.sh
+b50782b3742dfbf8a319c60571c968e93fdf8547db747c759edcffae68cb98bf  ./update.sh
@@ -0,0 +1,103 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck source=common.sh
+source "$SCRIPT_DIR/common.sh"
+cd "$PROJECT_ROOT"
+
+MODE="debug"
+ACTION="run"
+INSTALL_DEPS=1
+RESET_DB=0
+HOST=""
+PORT=""
+
+usage() {
+  cat <<'TXT'
+GREE Controller - development environment
+
+Usage:
+  ./scripts/dev.sh                  install missing tools, build and run
+  ./scripts/dev.sh --release        run an optimized build
+  ./scripts/dev.sh --check          formatting, tests, build and API smoke test
+  ./scripts/dev.sh --reset          remove the local database before startup
+  ./scripts/dev.sh --no-install     do not install system packages or Rust
+  ./scripts/dev.sh --host 0.0.0.0 --port 8787
+TXT
+}
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --release) MODE="release"; shift ;;
+    --check) ACTION="check"; shift ;;
+    --reset) RESET_DB=1; shift ;;
+    --no-install) INSTALL_DEPS=0; shift ;;
+    --host) HOST="${2:?missing value for --host}"; shift 2 ;;
+    --port) PORT="${2:?missing value for --port}"; shift 2 ;;
+    -h|--help) usage; exit 0 ;;
+    *) echo "Unknown argument: $1" >&2; usage; exit 2 ;;
+  esac
+done
+
+if [[ "$INSTALL_DEPS" -eq 1 ]]; then
+  install_build_dependencies
+  ensure_rust
+else
+  command -v cargo >/dev/null 2>&1 || fail "Cargo is not installed and --no-install was requested."
+fi
+
+
+if [[ ! -f .env ]]; then
+  cp .env.example .env
+  say "Created .env from the example configuration"
+fi
+mkdir -p data
+if [[ "$RESET_DB" -eq 1 ]]; then
+  rm -f data/gree-controller.db data/gree-controller.db-shm data/gree-controller.db-wal
+  say "Removed the local database"
+fi
+
+set -a
+# shellcheck disable=SC1091
+source ./.env
+set +a
+
+if [[ -n "$HOST" || -n "$PORT" ]]; then
+  current="${GREE_CONTROLLER_BIND:-0.0.0.0:8787}"
+  current_host="${current%:*}"
+  current_port="${current##*:}"
+  export GREE_CONTROLLER_BIND="${HOST:-$current_host}:${PORT:-$current_port}"
+fi
+
+if [[ "$ACTION" == "check" ]]; then
+  say "Checking formatting"
+  cargo fmt --all -- --check
+  say "Running Rust tests"
+  cargo test --all-targets
+  say "Building the application"
+  cargo build
+  say "Running HTTP/API smoke test"
+  "$SCRIPT_DIR/smoke.sh"
+  say "All checks passed"
+  exit 0
+fi
+
+if [[ "$MODE" == "release" ]]; then
+  say "Building release version"
+  cargo build --release
+  BINARY="$PROJECT_ROOT/target/release/gree-controller"
+else
+  say "Building debug version"
+  cargo build
+  BINARY="$PROJECT_ROOT/target/debug/gree-controller"
+fi
+
+bind="${GREE_CONTROLLER_BIND:-0.0.0.0:8787}"
+display_host="${bind%:*}"
+[[ "$display_host" == "0.0.0.0" ]] && display_host="127.0.0.1"
+say "Panel: http://${display_host}:${bind##*:}"
+say "Stop: Ctrl+C"
+exec "$BINARY"
+Wspierane przez Gitea
+Wersja: 1.27.2
+Strona: 30ms Szablon: 4ms
@@ -54,6 +54,70 @@ grep -q '"control_temperature"' "$TMP/history.json"
 curl -fsS "http://127.0.0.1:$PORT/api/readings?device_id=sim-salon&hours=1" >"$TMP/readings.json"
 grep -q '"readings"' "$TMP/readings.json"

+# Visual Flow: source graph, dry-run, export/import and optimistic concurrency.
+cat >"$TMP/flow-create.json" <<EOF
+{"name":"Smoke Flow","enabled":true,"description":"smoke","nodes":[{"id":"cond","kind":"constant","x":20,"y":20,"config":{"value":true}},{"id":"action","kind":"zone_thermostat","x":240,"y":20,"config":{"zone_id":"$ZONE_ID","preset":"comfort","mode":"auto","cooldown_seconds":60}}],"edges":[{"id":"edge","from":"cond","to":"action"}]}
+EOF
+curl -fsS -X POST -H 'Content-Type: application/json' --data-binary @"$TMP/flow-create.json"   "http://127.0.0.1:$PORT/api/flows" >"$TMP/flow.json"
+grep -q '"revision":1' "$TMP/flow.json"
+FLOW_ID="$(python3 -c 'import json,sys; print(json.load(open(sys.argv[1]))["id"])' "$TMP/flow.json")"
+FLOW_REVISION="$(python3 -c 'import json,sys; print(json.load(open(sys.argv[1]))["revision"])' "$TMP/flow.json")"
+python3 - "$TMP/flow-create.json" "$TMP/flow-simulate.json" "$FLOW_ID" <<'PYFLOW'
+import json,sys,datetime
+flow=json.load(open(sys.argv[1]))
+json.dump({"flow":flow,"flow_id":sys.argv[3],"at":datetime.datetime.now(datetime.timezone.utc).isoformat(),"overrides":{"cond":True},"log":True},open(sys.argv[2],"w"))
+PYFLOW
+curl -fsS -X POST -H 'Content-Type: application/json' --data-binary @"$TMP/flow-simulate.json"   "http://127.0.0.1:$PORT/api/flows/simulate" >"$TMP/flow-dry-run.json"
+grep -q '"dry_run":true' "$TMP/flow-dry-run.json"
+curl -fsS "http://127.0.0.1:$PORT/api/flows/$FLOW_ID/export" >"$TMP/flow-export.json"
+grep -q '"format":"gree-controller-flow"' "$TMP/flow-export.json"
+curl -fsS -X POST -H 'Content-Type: application/json' --data-binary @"$TMP/flow-export.json"   "http://127.0.0.1:$PORT/api/flows/import" >"$TMP/flow-import.json"
+grep -q '"revision":1' "$TMP/flow-import.json"
+python3 - "$TMP/flow-create.json" "$TMP/flow-update.json" "$FLOW_REVISION" <<'PYFLOW'
+import json,sys
+flow=json.load(open(sys.argv[1])); flow["expected_revision"]=int(sys.argv[3]); flow["description"]="updated"
+json.dump(flow,open(sys.argv[2],"w"))
+PYFLOW
+curl -fsS -X PUT -H 'Content-Type: application/json' --data-binary @"$TMP/flow-update.json"   "http://127.0.0.1:$PORT/api/flows/$FLOW_ID" >"$TMP/flow-updated.json"
+grep -q '"revision":2' "$TMP/flow-updated.json"
+STALE_STATUS="$(curl -sS -o /dev/null -w '%{http_code}' -X PUT -H 'Content-Type: application/json' --data-binary @"$TMP/flow-update.json" "http://127.0.0.1:$PORT/api/flows/$FLOW_ID")"
+[[ "$STALE_STATUS" == "409" ]]
+
+# A schedule-compatible Flow must keep using the native schedule engine.
+cat >"$TMP/flow-schedule.json" <<EOF
+{"name":"Native schedule Flow","enabled":true,"nodes":[{"id":"days","kind":"weekday","x":20,"y":20,"config":{"days":[1,2,3,4,5,6,7]}},{"id":"time","kind":"time_range","x":180,"y":20,"config":{"start":"06:00","end":"08:00"}},{"id":"action","kind":"zone_thermostat","x":360,"y":20,"config":{"zone_id":"$ZONE_ID","preset":"comfort","mode":"auto","cooldown_seconds":60}}],"edges":[{"id":"e1","from":"days","to":"time"},{"id":"e2","from":"time","to":"action"}]}
+EOF
+curl -fsS -X POST -H 'Content-Type: application/json' --data-binary @"$TMP/flow-schedule.json" \
+  "http://127.0.0.1:$PORT/api/flows" >"$TMP/flow-schedule-result.json"
+python3 - "$TMP/flow-schedule-result.json" <<'PYFLOW'
+import json,sys
+flow=json.load(open(sys.argv[1]))
+assert len(flow["compiled_schedule_ids"]) == 1, flow
+assert len(flow["compiled_automation_ids"]) == 0, flow
+PYFLOW
+
+# HA errors must fail closed: even a != condition cannot become true just because HA is unavailable.
+cat >"$TMP/flow-ha-safe.json" <<EOF
+{"flow":{"name":"HA fail closed","enabled":true,"nodes":[{"id":"ha","kind":"ha_state","x":20,"y":20,"config":{"entity_id":"binary_sensor.missing","operator":"neq","value":"on"}},{"id":"action","kind":"zone_thermostat","x":260,"y":20,"config":{"zone_id":"$ZONE_ID","preset":"comfort","mode":"auto","cooldown_seconds":60}}],"edges":[{"id":"e1","from":"ha","to":"action"}]},"log":false}
+EOF
+curl -fsS -X POST -H 'Content-Type: application/json' --data-binary @"$TMP/flow-ha-safe.json" \
+  "http://127.0.0.1:$PORT/api/flows/simulate" >"$TMP/flow-ha-safe-result.json"
+python3 - "$TMP/flow-ha-safe-result.json" <<'PYFLOW'
+import json,sys
+result=json.load(open(sys.argv[1]))
+action=result["actions"][0]
+assert action["matched"] is False, result
+assert action["would_execute"] is False, result
+PYFLOW
+
+# Direct GREE Flow actions use the existing DeviceCommand surface beyond power/mode/target.
+cat >"$TMP/flow-device-options.json" <<EOF
+{"flow":{"name":"GREE options","enabled":true,"nodes":[{"id":"yes","kind":"constant","x":20,"y":20,"config":{"value":true}},{"id":"action","kind":"device_action","x":260,"y":20,"config":{"device_id":"sim-salon","light":false,"turbo":true,"cooldown_seconds":60}}],"edges":[{"id":"e1","from":"yes","to":"action"}]},"log":false}
+EOF
+curl -fsS -X POST -H 'Content-Type: application/json' --data-binary @"$TMP/flow-device-options.json" \
+  "http://127.0.0.1:$PORT/api/flows/simulate" >"$TMP/flow-device-options-result.json"
+grep -q '"would_execute":true' "$TMP/flow-device-options-result.json"
+
 # Home Assistant gets its own generated, restricted controller token.
 curl -fsS -X POST -H 'Content-Type: application/json' \
  -d '{"name":"Smoke Home Assistant"}' \
@@ -45,6 +45,7 @@ const SPA_ROUTES: &[&str] = &[
    "/groups",
    "/schedules",
    "/automations",
+    "/flows",
    "/simulation",
    "/night-mode",
    "/home-assistant",
@@ -84,6 +85,12 @@ pub fn router(state: AppState) -> Router {
        .route("/api/schedules/:id", get(get_schedule).put(update_schedule).delete(delete_schedule))
        .route("/api/automations", get(list_automations).post(create_automation))
        .route("/api/automations/:id", get(get_automation).put(update_automation).delete(delete_automation))
+        .route("/api/flows", get(list_flows).post(create_flow))
+        .route("/api/flows/import", post(import_flow))
+        .route("/api/flows/simulate", post(simulate_flow))
+        .route("/api/flows/:id/export", get(export_flow))
+        .route("/api/flows/:id/logs", get(flow_logs))
+        .route("/api/flows/:id", get(get_flow).put(update_flow).delete(delete_flow))
        .route("/api/readings", get(readings))
        .route("/api/history", get(history))
        .route("/api/control-plan", get(control_plan))
@@ -125,6 +132,7 @@ pub fn router(state: AppState) -> Router {
        .route("/manifest.webmanifest", get(manifest))
        .route("/sw.js", get(service_worker))
        .route("/favicon.svg", get(favicon))
+        .route("/flows/:id", get(index))
        .route("/lang/index.json", get(language_index))
        .route("/lang/:file", get(language_file))
        .merge(protected)
@@ -167,6 +175,7 @@ include!("api/groups.rs");
 include!("api/house.rs");
 include!("api/schedules.rs");
 include!("api/automations.rs");
+include!("api/flows.rs");
 include!("api/history.rs");
 include!("api/events.rs");
 include!("api/settings.rs");
@@ -87,6 +87,7 @@ impl AutomationInput {
            action_group_id: self.action_group_id.map(|value| value.trim().to_string()).filter(|value| !value.is_empty()),
            action_preset: self.action_preset.map(|value| value.trim().to_string()).filter(|value| !value.is_empty()),
            action: self.action, cooldown_seconds: self.cooldown_seconds.max(30), last_fired_at,
+            action_zone_id: None, action_zone_preset: None, flow_conditions: vec![], flow_id: None, flow_node_id: None,
            created_at, updated_at: Utc::now() }
    }
 }
@@ -140,6 +141,7 @@ async fn update_automation(State(state): State<AppState>, Path(id): Path<String>
    let _automation_guard = state.lock_automation_operation().await;
    input.validate()?;
    let existing = state.db.get_automation(&id)?.ok_or_else(|| AppError::NotFound(format!("automation {id}")))?;
+    if existing.flow_id.is_some() { return Err(AppError::BadRequest("this automation is generated by Flow; edit it in the Flow editor".into())); }
    let action_group_id = input.action_group_id.as_deref().map(str::trim).filter(|value| !value.is_empty()).map(str::to_string);
    let _group_guard = if let Some(group_id) = action_group_id.as_deref() {
        Some(state.lock_group_operation(group_id).await)
@@ -153,6 +155,8 @@ async fn update_automation(State(state): State<AppState>, Path(id): Path<String>
 async fn delete_automation(State(state): State<AppState>, Path(id): Path<String>) -> Result<StatusCode, AppError> {
    let _configuration_guard = state.lock_configuration_operation().await;
    let _automation_guard = state.lock_automation_operation().await;
+    let existing = state.db.get_automation(&id)?.ok_or_else(|| AppError::NotFound(format!("automation {id}")))?;
+    if existing.flow_id.is_some() { return Err(AppError::BadRequest("this automation is generated by Flow; delete it from the Flow editor".into())); }
    if !state.db.delete_automation(&id)? { return Err(AppError::NotFound(format!("automation {id}"))); }
    state.broadcast("automation.deleted", json!({"id": id}));
    Ok(StatusCode::NO_CONTENT)
@@ -0,0 +1,561 @@
+#[derive(Debug, Deserialize)]
+struct FlowInput {
+    name: String,
+    #[serde(default = "yes")]
+    enabled: bool,
+    #[serde(default)]
+    description: String,
+    #[serde(default)]
+    nodes: Vec<crate::models::FlowNode>,
+    #[serde(default)]
+    edges: Vec<crate::models::FlowEdge>,
+    #[serde(default)]
+    expected_revision: Option<u64>,
+}
+
+#[derive(Debug, Deserialize)]
+struct FlowSimulationInput {
+    flow: FlowInput,
+    #[serde(default)]
+    flow_id: Option<String>,
+    #[serde(default)]
+    at: Option<String>,
+    #[serde(default)]
+    overrides: std::collections::HashMap<String, Value>,
+    #[serde(default = "yes")]
+    log: bool,
+}
+
+#[derive(Debug, Deserialize)]
+struct FlowLogsQuery { limit: Option<u32> }
+
+fn flow_string(config: &Value, key: &str) -> Option<String> {
+    config.get(key).and_then(Value::as_str).map(str::trim).filter(|v| !v.is_empty()).map(str::to_string)
+}
+fn flow_f64(config: &Value, key: &str) -> Option<f64> { config.get(key).and_then(Value::as_f64) }
+fn flow_u8(config: &Value, key: &str) -> Option<u8> { config.get(key).and_then(Value::as_u64).and_then(|value| u8::try_from(value).ok()) }
+fn flow_bool(config: &Value, key: &str) -> Option<bool> { config.get(key).and_then(Value::as_bool) }
+
+fn flow_condition_kind(kind: &str) -> bool {
+    matches!(kind,
+        "weekday" | "time_range" | "date_range" | "outdoor_temperature" | "device_temperature" |
+        "zone_temperature" | "ha_state" | "ha_numeric" | "ha_attribute" | "ha_available" | "house_mode" |
+        "device_state" | "zone_state" | "group_state" | "night_mode" | "constant"
+    )
+}
+fn flow_logic_kind(kind: &str) -> bool { matches!(kind, "logic_and" | "logic_or" | "logic_not") }
+fn flow_action_kind(kind: &str) -> bool { matches!(kind, "zone_thermostat" | "device_action" | "group_action") }
+
+fn validate_flow_graph(input: &FlowInput) -> Result<(), AppError> {
+    if input.name.trim().is_empty() { return Err(AppError::BadRequest("flow name is required".into())); }
+    if input.nodes.is_empty() { return Err(AppError::BadRequest("flow needs at least one block".into())); }
+    let mut ids = std::collections::HashSet::<String>::new();
+    for node in &input.nodes {
+        if node.id.trim().is_empty() || !ids.insert(node.id.clone()) { return Err(AppError::BadRequest("flow contains duplicate or empty block IDs".into())); }
+        if !(flow_condition_kind(&node.kind) || flow_action_kind(&node.kind) || flow_logic_kind(&node.kind)) {
+            return Err(AppError::BadRequest(format!("unsupported flow block: {}", node.kind)));
+        }
+    }
+    if !input.nodes.iter().any(|node| flow_action_kind(&node.kind)) { return Err(AppError::BadRequest("flow needs at least one action block".into())); }
+    let mut edge_ids = std::collections::HashSet::<String>::new();
+    let mut connections = std::collections::HashSet::<(String, String)>::new();
+    for edge in &input.edges {
+        if edge.id.trim().is_empty() || !edge_ids.insert(edge.id.clone()) || !connections.insert((edge.from.clone(), edge.to.clone())) {
+            return Err(AppError::BadRequest("flow contains duplicate or empty connection IDs".into()));
+        }
+        if edge.from == edge.to || !ids.contains(edge.from.as_str()) || !ids.contains(edge.to.as_str()) {
+            return Err(AppError::BadRequest("flow contains an invalid connection".into()));
+        }
+        let from = input.nodes.iter().find(|node| node.id == edge.from).expect("validated Flow source");
+        let to = input.nodes.iter().find(|node| node.id == edge.to).expect("validated Flow target");
+        if flow_action_kind(&from.kind) {
+            return Err(AppError::BadRequest("Flow action blocks must be terminal and cannot feed another block".into()));
+        }
+        if !(flow_condition_kind(&to.kind) || flow_logic_kind(&to.kind) || flow_action_kind(&to.kind)) {
+            return Err(AppError::BadRequest("Flow connection has an unsupported target".into()));
+        }
+    }
+    // Reject cycles. Flow is deliberately a DAG: finite evaluation, deterministic topological order,
+    // and no hidden state machine semantics unless a dedicated stateful block is introduced later.
+    let mut outgoing = std::collections::HashMap::<String, Vec<String>>::new();
+    for edge in &input.edges { outgoing.entry(edge.from.clone()).or_default().push(edge.to.clone()); }
+    fn visit(id: &str, outgoing: &std::collections::HashMap<String, Vec<String>>, temp: &mut std::collections::HashSet<String>, done: &mut std::collections::HashSet<String>) -> bool {
+        if done.contains(id) { return false; }
+        if !temp.insert(id.to_string()) { return true; }
+        if outgoing.get(id).into_iter().flatten().any(|next| visit(next, outgoing, temp, done)) { return true; }
+        temp.remove(id); done.insert(id.to_string()); false
+    }
+    let mut temp = std::collections::HashSet::new(); let mut done = std::collections::HashSet::new();
+    for id in &ids { if visit(id, &outgoing, &mut temp, &mut done) { return Err(AppError::BadRequest("flow connections cannot contain a cycle".into())); } }
+    Ok(())
+}
+
+fn compile_flow_program(action_id: &str, nodes: &[crate::models::FlowNode], edges: &[crate::models::FlowEdge]) -> Result<Vec<crate::models::FlowCondition>, AppError> {
+    let by_id: std::collections::HashMap<String, crate::models::FlowNode> = nodes.iter().cloned().map(|node| (node.id.clone(), node)).collect();
+    let mut incoming = std::collections::HashMap::<String, Vec<String>>::new();
+    for edge in edges { incoming.entry(edge.to.clone()).or_default().push(edge.from.clone()); }
+    let action_inputs = incoming.get(action_id).cloned().unwrap_or_default();
+    if action_inputs.is_empty() { return Err(AppError::BadRequest(format!("action '{action_id}' needs at least one connected condition"))); }
+
+    fn visit(
+        id: &str,
+        by_id: &std::collections::HashMap<String, crate::models::FlowNode>,
+        incoming: &std::collections::HashMap<String, Vec<String>>,
+        seen: &mut std::collections::HashSet<String>,
+        out: &mut Vec<crate::models::FlowCondition>,
+    ) -> Result<(), AppError> {
+        if !seen.insert(id.to_string()) { return Ok(()); }
+        let node = by_id.get(id).ok_or_else(|| AppError::BadRequest("Flow references a missing block".into()))?;
+        if !(flow_condition_kind(&node.kind) || flow_logic_kind(&node.kind)) {
+            return Err(AppError::BadRequest("only condition or logic blocks can feed a Flow action".into()));
+        }
+        let inputs = incoming.get(id).cloned().unwrap_or_default();
+        for input in &inputs { visit(input, by_id, incoming, seen, out)?; }
+        match node.kind.as_str() {
+            "logic_not" if inputs.len() != 1 => return Err(AppError::BadRequest("NOT block needs exactly one input".into())),
+            "logic_and" | "logic_or" if inputs.is_empty() => return Err(AppError::BadRequest(format!("{} block needs at least one input", node.kind))),
+            _ => {}
+        }
+        out.push(crate::models::FlowCondition { id: node.id.clone(), kind: node.kind.clone(), config: node.config.clone(), inputs });
+        Ok(())
+    }
+
+    let mut out = Vec::new();
+    let mut seen = std::collections::HashSet::new();
+    for input in &action_inputs { visit(input, &by_id, &incoming, &mut seen, &mut out)?; }
+    out.push(crate::models::FlowCondition {
+        id: format!("__flow_action__:{action_id}"),
+        kind: "logic_and".into(),
+        config: json!({}),
+        inputs: action_inputs,
+    });
+    Ok(out)
+}
+
+fn validate_text_comparison(config: &Value) -> Result<(), AppError> {
+    let op = flow_string(config, "operator").unwrap_or_else(|| "eq".into());
+    if !matches!(op.as_str(), "eq" | "neq") { return Err(AppError::BadRequest("state operator must be eq or neq".into())); }
+    if config.get("value").is_none() { return Err(AppError::BadRequest("state block needs a value".into())); }
+    Ok(())
+}
+
+fn validate_condition(condition: &crate::models::FlowCondition, state: &AppState) -> Result<(), AppError> {
+    match condition.kind.as_str() {
+        "weekday" => {
+            let days = condition.config.get("days").and_then(Value::as_array).ok_or_else(|| AppError::BadRequest("weekday block needs days".into()))?;
+            if days.is_empty() || days.iter().any(|v| v.as_u64().map(|d| !(1..=7).contains(&d)).unwrap_or(true)) { return Err(AppError::BadRequest("weekday block contains invalid days".into())); }
+        }
+        "time_range" => {
+            for key in ["start", "end"] { let value = flow_string(&condition.config, key).ok_or_else(|| AppError::BadRequest(format!("time range needs {key}")))?; chrono::NaiveTime::parse_from_str(&value, "%H:%M").map_err(|_| AppError::BadRequest("invalid time range".into()))?; }
+        }
+        "date_range" => {
+            let start = flow_string(&condition.config, "start").ok_or_else(|| AppError::BadRequest("date range needs start".into()))?;
+            let end = flow_string(&condition.config, "end").ok_or_else(|| AppError::BadRequest("date range needs end".into()))?;
+            let start = chrono::NaiveDate::parse_from_str(&start, "%Y-%m-%d").map_err(|_| AppError::BadRequest("invalid date range".into()))?;
+            let end = chrono::NaiveDate::parse_from_str(&end, "%Y-%m-%d").map_err(|_| AppError::BadRequest("invalid date range".into()))?;
+            if start > end { return Err(AppError::BadRequest("date range start must not be after end".into())); }
+        }
+        "outdoor_temperature" => { validate_flow_comparison(&condition.config)?; }
+        "device_temperature" => {
+            validate_flow_comparison(&condition.config)?;
+            let id = flow_string(&condition.config, "device_id").ok_or_else(|| AppError::BadRequest("device temperature block needs device".into()))?;
+            if state.db.get_device(&id)?.is_none() { return Err(AppError::BadRequest("flow references a missing device".into())); }
+        }
+        "zone_temperature" => {
+            validate_flow_comparison(&condition.config)?;
+            let id = flow_string(&condition.config, "zone_id").ok_or_else(|| AppError::BadRequest("zone temperature block needs zone".into()))?;
+            if state.db.get_zone(&id)?.is_none() { return Err(AppError::BadRequest("flow references a missing zone".into())); }
+        }
+        "ha_state" => {
+            if flow_string(&condition.config, "entity_id").is_none() { return Err(AppError::BadRequest("Home Assistant state block needs entity_id".into())); }
+            validate_text_comparison(&condition.config)?;
+        }
+        "ha_numeric" => {
+            if flow_string(&condition.config, "entity_id").is_none() { return Err(AppError::BadRequest("Home Assistant numeric block needs entity_id".into())); }
+            validate_flow_comparison(&condition.config)?;
+        }
+        "ha_attribute" => {
+            if flow_string(&condition.config, "entity_id").is_none() || flow_string(&condition.config, "attribute").is_none() {
+                return Err(AppError::BadRequest("Home Assistant attribute block needs entity_id and attribute".into()));
+            }
+            let op = flow_string(&condition.config, "operator").unwrap_or_else(|| "eq".into());
+            if !matches!(op.as_str(), "lt" | "lte" | "gt" | "gte" | "eq" | "neq") { return Err(AppError::BadRequest("unsupported Home Assistant attribute operator".into())); }
+            if condition.config.get("value").is_none() { return Err(AppError::BadRequest("Home Assistant attribute block needs a value".into())); }
+        }
+        "ha_available" => {
+            if flow_string(&condition.config, "entity_id").is_none() { return Err(AppError::BadRequest("Home Assistant availability block needs entity_id".into())); }
+        }
+        "house_mode" => {
+            let value = flow_string(&condition.config, "value").ok_or_else(|| AppError::BadRequest("house mode block needs a mode".into()))?;
+            if !matches!(value.as_str(), "cool" | "heat" | "off") { return Err(AppError::BadRequest("house mode must be cool, heat or off".into())); }
+            validate_text_comparison(&condition.config)?;
+        }
+        "device_state" => {
+            let id = flow_string(&condition.config, "device_id").ok_or_else(|| AppError::BadRequest("device state block needs device".into()))?;
+            if state.db.get_device(&id)?.is_none() { return Err(AppError::BadRequest("flow references a missing device".into())); }
+            let field = flow_string(&condition.config, "field").ok_or_else(|| AppError::BadRequest("device state block needs a field".into()))?;
+            if !matches!(field.as_str(), "enabled" | "online" | "power" | "mode" | "fan_speed" | "swing_vertical" | "swing_horizontal" | "quiet" | "turbo" | "light" | "air" | "xfan" | "health" | "sleep") { return Err(AppError::BadRequest("unsupported device state field".into())); }
+            validate_text_comparison(&condition.config)?;
+        }
+        "zone_state" => {
+            let id = flow_string(&condition.config, "zone_id").ok_or_else(|| AppError::BadRequest("zone state block needs zone".into()))?;
+            if state.db.get_zone(&id)?.is_none() { return Err(AppError::BadRequest("flow references a missing zone".into())); }
+            let field = flow_string(&condition.config, "field").ok_or_else(|| AppError::BadRequest("zone state block needs a field".into()))?;
+            if !matches!(field.as_str(), "enabled" | "mode" | "active_preset" | "demand" | "control_owner" | "device_manual_override" | "local_thermostat_power") { return Err(AppError::BadRequest("unsupported zone state field".into())); }
+            validate_text_comparison(&condition.config)?;
+        }
+        "group_state" => {
+            let id = flow_string(&condition.config, "group_id").ok_or_else(|| AppError::BadRequest("group state block needs group".into()))?;
+            if state.db.get_group(&id)?.is_none() { return Err(AppError::BadRequest("flow references a missing group".into())); }
+            let field = flow_string(&condition.config, "field").ok_or_else(|| AppError::BadRequest("group state block needs a field".into()))?;
+            if field != "power_enabled" { return Err(AppError::BadRequest("unsupported group state field".into())); }
+            validate_text_comparison(&condition.config)?;
+        }
+        "night_mode" => {}
+        "constant" => {
+            if condition.config.get("value").and_then(Value::as_bool).is_none() { return Err(AppError::BadRequest("constant block needs a boolean value".into())); }
+        }
+        _ => {}
+    }
+    Ok(())
+}
+fn validate_flow_comparison(config: &Value) -> Result<(), AppError> {
+    let op = flow_string(config, "operator").unwrap_or_else(|| "lt".into());
+    if !matches!(op.as_str(), "lt" | "lte" | "gt" | "gte" | "eq" | "neq") { return Err(AppError::BadRequest("unsupported comparison operator".into())); }
+    if flow_f64(config, "value").is_none() { return Err(AppError::BadRequest("comparison block needs a numeric value".into())); }
+    Ok(())
+}
+
+fn compile_flow(state: &AppState, mut flow: crate::models::Flow) -> Result<(crate::models::Flow, Vec<Schedule>, Vec<Automation>), AppError> {
+    let mut schedules = Vec::new();
+    let mut automations = Vec::new();
+    let now = Utc::now();
+    let zones = state.db.list_zones()?;
+    let groups = state.db.list_groups()?;
+    let devices = state.db.list_devices()?;
+    let previous_schedules: std::collections::HashMap<String, Schedule> = state.db.list_schedules()?.into_iter()
+        .filter(|item| item.flow_id.as_deref() == Some(flow.id.as_str())).map(|item| (item.id.clone(), item)).collect();
+    let previous_automations: std::collections::HashMap<String, Automation> = state.db.list_automations()?.into_iter()
+        .filter(|item| item.flow_id.as_deref() == Some(flow.id.as_str())).map(|item| (item.id.clone(), item)).collect();
+    let actions: Vec<_> = flow.nodes.iter().filter(|node| flow_action_kind(&node.kind)).cloned().collect();
+    for action_node in actions {
+        let conditions = compile_flow_program(&action_node.id, &flow.nodes, &flow.edges)?;
+        for condition in conditions.iter().filter(|condition| flow_condition_kind(&condition.kind)) { validate_condition(condition, state)?; }
+        let schedule_leaves: Vec<_> = conditions.iter().filter(|condition| flow_condition_kind(&condition.kind)).collect();
+        let preset_for_schedule = flow_string(&action_node.config, "preset").unwrap_or_else(|| "comfort".into());
+        let mode_for_schedule = flow_string(&action_node.config, "mode").unwrap_or_else(|| "auto".into());
+        let native_time_range = schedule_leaves.iter().find(|condition| condition.kind == "time_range")
+            .and_then(|condition| flow_string(&condition.config, "start").zip(flow_string(&condition.config, "end")))
+            .and_then(|(start, end)| chrono::NaiveTime::parse_from_str(&start, "%H:%M").ok().zip(chrono::NaiveTime::parse_from_str(&end, "%H:%M").ok()))
+            .map(|(start, end)| start < end)
+            .unwrap_or(false);
+        let schedule_only = action_node.kind == "zone_thermostat"
+            && !conditions.iter().any(|condition| matches!(condition.kind.as_str(), "logic_or" | "logic_not"))
+            && schedule_leaves.iter().all(|condition| matches!(condition.kind.as_str(), "weekday" | "time_range"))
+            && schedule_leaves.iter().filter(|condition| condition.kind == "weekday").count() == 1
+            && schedule_leaves.iter().filter(|condition| condition.kind == "time_range").count() == 1
+            && native_time_range
+            && preset_for_schedule != "auto"
+            && mode_for_schedule == "auto"
+            && flow_bool(&action_node.config, "power").is_none();
+        if schedule_only {
+            let zone_id = flow_string(&action_node.config, "zone_id").ok_or_else(|| AppError::BadRequest("thermostat block needs a zone".into()))?;
+            let zone = zones.iter().find(|z| z.id == zone_id).ok_or_else(|| AppError::BadRequest("thermostat block references a missing zone".into()))?;
+            let preset = flow_string(&action_node.config, "preset").unwrap_or_else(|| "comfort".into());
+            if !matches!(preset.as_str(), "comfort" | "sleep" | "away" | "custom") { return Err(AppError::BadRequest("unsupported thermostat preset".into())); }
+            let setpoint = flow_f64(&action_node.config, "setpoint").unwrap_or(zone.setpoint);
+            if preset == "custom" && !(8.0..=30.0).contains(&setpoint) { return Err(AppError::BadRequest("custom thermostat target must be between 8 and 30 C".into())); }
+            let weekday = schedule_leaves.iter().find(|c| c.kind == "weekday").copied().unwrap();
+            let time = schedule_leaves.iter().find(|c| c.kind == "time_range").copied().unwrap();
+            let weekdays = weekday.config.get("days").and_then(Value::as_array).unwrap().iter().filter_map(Value::as_u64).map(|v| v as u32).collect();
+            let id = format!("flow:{}:schedule:{}", flow.id, action_node.id);
+            let created_at = previous_schedules.get(&id).map(|item| item.created_at.clone()).unwrap_or_else(|| now.clone());
+            let schedule = Schedule {
+                id, zone_id, name: format!("{} · {}", flow.name, zone.name), enabled: flow.enabled,
+                weekdays, start_time: flow_string(&time.config, "start").unwrap(), end_time: flow_string(&time.config, "end").unwrap(), preset, setpoint,
+                created_at, updated_at: now.clone(), flow_id: Some(flow.id.clone()), flow_node_id: Some(action_node.id.clone()),
+            };
+            schedules.push(schedule);
+            continue;
+        }
+        drop(schedule_leaves);
+        let id = format!("flow:{}:automation:{}", flow.id, action_node.id);
+        let created_at = previous_automations.get(&id).map(|item| item.created_at.clone()).unwrap_or_else(|| now.clone());
+        let last_fired_at = previous_automations.get(&id).and_then(|item| item.last_fired_at.clone());
+        let mut item = Automation {
+            id, name: format!("{} · {}", flow.name, action_node.id), enabled: flow.enabled,
+            trigger_kind: "flow".into(), trigger_device_id: None, threshold: None, at_time: None,
+            action_device_id: String::new(), action_group_id: None, action_preset: None, action: DeviceCommand::default(), cooldown_seconds: 60,
+            last_fired_at, action_zone_id: None, action_zone_preset: None, flow_conditions: conditions,
+            flow_id: Some(flow.id.clone()), flow_node_id: Some(action_node.id.clone()), created_at, updated_at: now.clone(),
+        };
+        if let Some(cooldown) = action_node.config.get("cooldown_seconds").and_then(Value::as_u64) { item.cooldown_seconds = cooldown.max(30); }
+        match action_node.kind.as_str() {
+            "zone_thermostat" => {
+                let zone_id = flow_string(&action_node.config, "zone_id").ok_or_else(|| AppError::BadRequest("thermostat block needs a zone".into()))?;
+                if !zones.iter().any(|z| z.id == zone_id) { return Err(AppError::BadRequest("thermostat block references a missing zone".into())); }
+                item.action_zone_id = Some(zone_id);
+                let preset = flow_string(&action_node.config, "preset").unwrap_or_else(|| "comfort".into());
+                if !matches!(preset.as_str(), "comfort" | "sleep" | "away" | "custom" | "auto") { return Err(AppError::BadRequest("unsupported thermostat preset".into())); }
+                item.action_zone_preset = Some(preset.clone());
+                if preset == "custom" { let target = flow_f64(&action_node.config, "setpoint").ok_or_else(|| AppError::BadRequest("custom thermostat block needs a target".into()))?; if !(8.0..=30.0).contains(&target) { return Err(AppError::BadRequest("custom thermostat target must be between 8 and 30 C".into())); } item.action.target_temperature = Some(target); }
+                if let Some(power) = flow_bool(&action_node.config, "power") { item.action.power = Some(power); }
+                if let Some(mode) = flow_string(&action_node.config, "mode") { if !matches!(mode.as_str(), "auto" | "heat" | "cool") { return Err(AppError::BadRequest("unsupported thermostat mode".into())); } item.action.mode = Some(mode); }
+            }
+            "device_action" => {
+                let id = flow_string(&action_node.config, "device_id").ok_or_else(|| AppError::BadRequest("device action needs a device".into()))?;
+                if !devices.iter().any(|d| d.id == id) { return Err(AppError::BadRequest("device action references a missing device".into())); }
+                item.action_device_id = id;
+                item.action.power = flow_bool(&action_node.config, "power");
+                item.action.mode = flow_string(&action_node.config, "mode");
+                item.action.target_temperature = flow_f64(&action_node.config, "target_temperature");
+                item.action.fan_speed = flow_u8(&action_node.config, "fan_speed");
+                item.action.swing_vertical = flow_bool(&action_node.config, "swing_vertical");
+                item.action.swing_horizontal = flow_bool(&action_node.config, "swing_horizontal");
+                item.action.quiet = flow_bool(&action_node.config, "quiet");
+                item.action.turbo = flow_bool(&action_node.config, "turbo");
+                item.action.light = flow_bool(&action_node.config, "light");
+                item.action.air = flow_bool(&action_node.config, "air");
+                item.action.xfan = flow_bool(&action_node.config, "xfan");
+                item.action.health = flow_bool(&action_node.config, "health");
+                item.action.sleep = flow_bool(&action_node.config, "sleep");
+                engine::validate_command(&item.action)?; if item.action.is_empty() { return Err(AppError::BadRequest("device action cannot be empty".into())); }
+            }
+            "group_action" => {
+                let id = flow_string(&action_node.config, "group_id").ok_or_else(|| AppError::BadRequest("group action needs a group".into()))?;
+                if !groups.iter().any(|g| g.id == id) { return Err(AppError::BadRequest("group action references a missing group".into())); }
+                item.action_group_id = Some(id); item.action.power = flow_bool(&action_node.config, "power"); item.action.mode = flow_string(&action_node.config, "mode"); item.action_preset = flow_string(&action_node.config, "preset");
+                if let Some(mode) = item.action.mode.as_deref() {
+                    if !matches!(mode, "auto" | "house" | "cool" | "heat") { return Err(AppError::BadRequest("unsupported Flow group mode".into())); }
+                }
+                if let Some(preset) = item.action_preset.as_deref() {
+                    if !matches!(preset, "auto" | "comfort" | "sleep" | "away" | "custom") { return Err(AppError::BadRequest("unsupported Flow group preset".into())); }
+                    if preset == "custom" {
+                        let target = flow_f64(&action_node.config, "setpoint").ok_or_else(|| AppError::BadRequest("custom Flow group preset needs a target".into()))?;
+                        if !(8.0..=30.0).contains(&target) { return Err(AppError::BadRequest("custom Flow group target must be between 8 and 30 C".into())); }
+                        item.action.target_temperature = Some(target);
+                    }
+                }
+                if item.action.power.is_none() && item.action.mode.is_none() && item.action_preset.is_none() { return Err(AppError::BadRequest("group action cannot be empty".into())); }
+            }
+            _ => unreachable!(),
+        }
+        automations.push(item);
+    }
+    let existing: Vec<_> = state.db.list_schedules()?.into_iter().filter(|s| s.flow_id.as_deref() != Some(flow.id.as_str())).collect();
+    for candidate in &schedules {
+        for other in existing.iter().chain(schedules.iter().filter(|s| s.id != candidate.id)) {
+            if engine::schedules_overlap(candidate, other) { return Err(AppError::BadRequest(format!("flow schedule '{}' overlaps with '{}'", candidate.name, other.name))); }
+        }
+    }
+    flow.compiled_schedule_ids = schedules.iter().map(|s| s.id.clone()).collect();
+    flow.compiled_automation_ids = automations.iter().map(|a| a.id.clone()).collect();
+    flow.summary = format!("{} bloków · {} harmonogramów · {} automatyzacji", flow.nodes.len(), schedules.len(), automations.len());
+    Ok((flow, schedules, automations))
+}
+
+fn flow_from_input(id: String, input: FlowInput, created_at: chrono::DateTime<Utc>, revision: u64) -> crate::models::Flow {
+    crate::models::Flow {
+        id, name: input.name.trim().into(), enabled: input.enabled, description: input.description.trim().into(), nodes: input.nodes, edges: input.edges,
+        summary: String::new(), compiled_schedule_ids: vec![], compiled_automation_ids: vec![], revision, created_at, updated_at: Utc::now(),
+    }
+}
+
+async fn list_flows(State(state): State<AppState>) -> Result<Json<Vec<crate::models::Flow>>, AppError> { Ok(Json(state.db.list_flows()?)) }
+async fn get_flow(State(state): State<AppState>, Path(id): Path<String>) -> Result<Json<crate::models::Flow>, AppError> { state.db.get_flow(&id)?.map(Json).ok_or_else(|| AppError::NotFound(format!("flow {id}"))) }
+
+async fn create_flow(State(state): State<AppState>, Json(input): Json<FlowInput>) -> Result<(StatusCode, Json<crate::models::Flow>), AppError> {
+    validate_flow_graph(&input)?;
+    let _configuration_guard = state.lock_configuration_operation().await;
+    let _automation_guard = state.lock_automation_operation().await;
+    let _schedule_guard = state.lock_schedule_operation().await;
+    let _cycle_guard = state.lock_zone_control_cycle().await;
+    let flow = flow_from_input(Uuid::new_v4().to_string(), input, Utc::now(), 1);
+    let (flow, schedules, automations) = compile_flow(&state, flow)?;
+    state.db.replace_flow_outputs(&flow, &schedules, &automations)?;
+    for zone_id in schedules.iter().map(|s| s.zone_id.as_str()).collect::<std::collections::HashSet<_>>() { refresh_zone_override_boundary(&state, zone_id).await?; }
+    state.log("info", "flow.created", &format!("Created Flow {}", flow.name), json!({"flow_id": flow.id, "revision": flow.revision, "schedules": schedules.len(), "automations": automations.len()}));
+    state.broadcast("flow.created", serde_json::to_value(&flow)?); state.wake_zone_control();
+    Ok((StatusCode::CREATED, Json(flow)))
+}
+
+async fn update_flow(State(state): State<AppState>, Path(id): Path<String>, Json(input): Json<FlowInput>) -> Result<Json<crate::models::Flow>, AppError> {
+    validate_flow_graph(&input)?;
+    let _configuration_guard = state.lock_configuration_operation().await;
+    let _automation_guard = state.lock_automation_operation().await;
+    let _schedule_guard = state.lock_schedule_operation().await;
+    let _cycle_guard = state.lock_zone_control_cycle().await;
+    let existing = state.db.get_flow(&id)?.ok_or_else(|| AppError::NotFound(format!("flow {id}")))?;
+    let expected = input.expected_revision.ok_or_else(|| AppError::BadRequest("Flow update requires expected_revision".into()))?;
+    if expected != existing.revision { return Err(AppError::Conflict(format!("flow {id} changed; expected revision {expected}, current revision {}", existing.revision))); }
+    let old_zone_ids: std::collections::HashSet<String> = state.db.list_schedules()?.into_iter().filter(|s| s.flow_id.as_deref() == Some(id.as_str())).map(|s| s.zone_id).collect();
+    let next_revision = existing.revision.saturating_add(1).max(1);
+    let flow = flow_from_input(id, input, existing.created_at, next_revision);
+    let (flow, schedules, automations) = compile_flow(&state, flow)?;
+    state.db.replace_flow_outputs(&flow, &schedules, &automations)?;
+    let mut zone_ids = old_zone_ids; zone_ids.extend(schedules.iter().map(|s| s.zone_id.clone()));
+    for zone_id in zone_ids { refresh_zone_override_boundary(&state, &zone_id).await?; }
+    state.log("info", "flow.updated", &format!("Updated Flow {}", flow.name), json!({"flow_id": flow.id, "revision": flow.revision, "schedules": schedules.len(), "automations": automations.len()}));
+    state.broadcast("flow.updated", serde_json::to_value(&flow)?); state.wake_zone_control();
+    Ok(Json(flow))
+}
+
+async fn delete_flow(State(state): State<AppState>, Path(id): Path<String>) -> Result<StatusCode, AppError> {
+    let _configuration_guard = state.lock_configuration_operation().await;
+    let _automation_guard = state.lock_automation_operation().await;
+    let _schedule_guard = state.lock_schedule_operation().await;
+    let _cycle_guard = state.lock_zone_control_cycle().await;
+    let zone_ids: std::collections::HashSet<String> = state.db.list_schedules()?.into_iter().filter(|s| s.flow_id.as_deref() == Some(id.as_str())).map(|s| s.zone_id).collect();
+    let existing = state.db.get_flow(&id)?.ok_or_else(|| AppError::NotFound(format!("flow {id}")))?;
+    if !state.db.delete_flow(&id)? { return Err(AppError::NotFound(format!("flow {id}"))); }
+    for zone_id in zone_ids { refresh_zone_override_boundary(&state, &zone_id).await?; }
+    state.log("info", "flow.deleted", &format!("Deleted Flow {}", existing.name), json!({"flow_id": id}));
+    state.broadcast("flow.deleted", json!({"id": id})); state.wake_zone_control();
+    Ok(StatusCode::NO_CONTENT)
+}
+
+async fn export_flow(State(state): State<AppState>, Path(id): Path<String>) -> Result<Json<Value>, AppError> {
+    let flow = state.db.get_flow(&id)?.ok_or_else(|| AppError::NotFound(format!("flow {id}")))?;
+    Ok(Json(json!({
+        "format": "gree-controller-flow",
+        "version": 1,
+        "exported_at": Utc::now(),
+        "flow": {
+            "name": flow.name,
+            "enabled": flow.enabled,
+            "description": flow.description,
+            "nodes": flow.nodes,
+            "edges": flow.edges
+        }
+    })))
+}
+
+async fn import_flow(State(state): State<AppState>, Json(document): Json<Value>) -> Result<(StatusCode, Json<crate::models::Flow>), AppError> {
+    if let Some(format) = document.get("format").and_then(Value::as_str) {
+        if format != "gree-controller-flow" { return Err(AppError::BadRequest("unsupported Flow import format".into())); }
+    }
+    let payload = document.get("flow").cloned().unwrap_or(document);
+    let mut input: FlowInput = serde_json::from_value(payload).map_err(|err| AppError::BadRequest(format!("invalid Flow import: {err}")))?;
+    input.expected_revision = None;
+    validate_flow_graph(&input)?;
+    let _configuration_guard = state.lock_configuration_operation().await;
+    let _automation_guard = state.lock_automation_operation().await;
+    let _schedule_guard = state.lock_schedule_operation().await;
+    let _cycle_guard = state.lock_zone_control_cycle().await;
+    let flow = flow_from_input(Uuid::new_v4().to_string(), input, Utc::now(), 1);
+    let (flow, schedules, automations) = compile_flow(&state, flow)?;
+    state.db.replace_flow_outputs(&flow, &schedules, &automations)?;
+    for zone_id in schedules.iter().map(|s| s.zone_id.as_str()).collect::<std::collections::HashSet<_>>() { refresh_zone_override_boundary(&state, zone_id).await?; }
+    state.log("info", "flow.imported", &format!("Imported Flow {}", flow.name), json!({"flow_id": flow.id, "revision": flow.revision}));
+    state.broadcast("flow.created", serde_json::to_value(&flow)?); state.wake_zone_control();
+    Ok((StatusCode::CREATED, Json(flow)))
+}
+
+fn dry_run_block_reason(state: &AppState, action: &crate::models::FlowNode) -> Result<Option<String>, AppError> {
+    match action.kind.as_str() {
+        "zone_thermostat" => {
+            let Some(zone_id) = flow_string(&action.config, "zone_id") else { return Ok(Some("missing_zone".into())); };
+            let Some(zone) = state.db.get_zone(&zone_id)? else { return Ok(Some("missing_zone".into())); };
+            if state.db.get_device(&zone.device_id)?.is_none() { return Ok(Some("missing_device".into())); }
+            if zone.device_manual_override { return Ok(Some("device_manual_override".into())); }
+            if zone.local_thermostat_power.is_some() { return Ok(Some("local_thermostat_override".into())); }
+            if engine::temporary_quick_thermostat_is_active(&zone, Utc::now()) { return Ok(Some("temporary_quick_thermostat".into())); }
+            if !zone.enabled && flow_bool(&action.config, "power") != Some(true) { return Ok(Some("zone_disabled".into())); }
+            Ok(None)
+        }
+        "device_action" => {
+            let Some(device_id) = flow_string(&action.config, "device_id") else { return Ok(Some("missing_device".into())); };
+            let Some(device) = state.db.get_device(&device_id)? else { return Ok(Some("missing_device".into())); };
+            if !device.enabled { return Ok(Some("device_disabled".into())); }
+            let zones = state.db.list_zones()?;
+            if zones.iter().any(|z| z.device_id == device_id && z.device_manual_override) { return Ok(Some("device_manual_override".into())); }
+            if zones.iter().any(|z| z.device_id == device_id && z.local_thermostat_power.is_some()) { return Ok(Some("local_thermostat_override".into())); }
+            if zones.iter().any(|z| z.device_id == device_id && engine::temporary_quick_thermostat_is_active(z, Utc::now())) { return Ok(Some("temporary_quick_thermostat".into())); }
+            if zones.iter().any(|z| z.device_id == device_id && !z.enabled) && flow_bool(&action.config, "power") != Some(true) { return Ok(Some("zone_disabled".into())); }
+            let mut command = DeviceCommand::default();
+            command.power = flow_bool(&action.config, "power");
+            command.mode = flow_string(&action.config, "mode");
+            command.target_temperature = flow_f64(&action.config, "target_temperature");
+            command.fan_speed = flow_u8(&action.config, "fan_speed");
+            command.swing_vertical = flow_bool(&action.config, "swing_vertical");
+            command.swing_horizontal = flow_bool(&action.config, "swing_horizontal");
+            command.quiet = flow_bool(&action.config, "quiet");
+            command.turbo = flow_bool(&action.config, "turbo");
+            command.light = flow_bool(&action.config, "light");
+            command.air = flow_bool(&action.config, "air");
+            command.xfan = flow_bool(&action.config, "xfan");
+            command.health = flow_bool(&action.config, "health");
+            command.sleep = flow_bool(&action.config, "sleep");
+            if zones.iter().any(|z| z.device_id == device_id) && engine::automation_action_conflicts_with_thermostat(&command) {
+                return Ok(Some("thermostat_owner_conflict".into()));
+            }
+            Ok(None)
+        }
+        "group_action" => {
+            let Some(group_id) = flow_string(&action.config, "group_id") else { return Ok(Some("missing_group".into())); };
+            let Some(group) = state.db.get_group(&group_id)? else { return Ok(Some("missing_group".into())); };
+            let climate_change = flow_string(&action.config, "mode").is_some() || flow_string(&action.config, "preset").is_some();
+            let resulting_enabled = flow_bool(&action.config, "power").unwrap_or(group.power_enabled);
+            if climate_change && !resulting_enabled { return Ok(Some("group_control_disabled".into())); }
+            Ok(None)
+        }
+        _ => Ok(Some("unsupported_action".into())),
+    }
+}
+
+async fn simulate_flow(State(state): State<AppState>, Json(input): Json<FlowSimulationInput>) -> Result<Json<Value>, AppError> {
+    validate_flow_graph(&input.flow)?;
+    let at = match input.at.as_deref().map(str::trim).filter(|v| !v.is_empty()) {
+        Some(value) => chrono::DateTime::parse_from_rfc3339(value).map_err(|_| AppError::BadRequest("simulation time must be RFC3339".into()))?.with_timezone(&chrono::Local),
+        None => chrono::Local::now(),
+    };
+    let preview_id = input.flow_id.clone().filter(|v| !v.trim().is_empty()).unwrap_or_else(|| format!("dry-run-{}", Uuid::new_v4()));
+    let preview = crate::models::Flow {
+        id: preview_id.clone(), name: input.flow.name.trim().into(), enabled: input.flow.enabled, description: input.flow.description.trim().into(),
+        nodes: input.flow.nodes.clone(), edges: input.flow.edges.clone(), summary: String::new(), compiled_schedule_ids: vec![], compiled_automation_ids: vec![], revision: 0,
+        created_at: Utc::now(), updated_at: Utc::now(),
+    };
+    let (compiled, schedules, automations) = compile_flow(&state, preview)?;
+    let devices = state.db.list_devices()?;
+    let mut actions = Vec::new();
+    for action in input.flow.nodes.iter().filter(|node| flow_action_kind(&node.kind)) {
+        let program = compile_flow_program(&action.id, &input.flow.nodes, &input.flow.edges)?;
+        let (matched, trace) = engine::evaluate_flow_conditions_trace(&state, &devices, &program, at.clone(), &input.overrides).await?;
+        let blocked_reason = if matched && !input.flow.enabled { Some("flow_disabled".into()) }
+            else if matched { dry_run_block_reason(&state, action)? } else { None };
+        actions.push(json!({
+            "node_id": action.id,
+            "kind": action.kind,
+            "matched": matched,
+            "would_execute": matched && blocked_reason.is_none(),
+            "blocked_reason": blocked_reason,
+            "config": action.config,
+            "trace": trace
+        }));
+    }
+    let result = json!({
+        "dry_run": true,
+        "at": at.to_rfc3339(),
+        "flow_id": input.flow_id,
+        "summary": compiled.summary,
+        "compiled": {"schedules": schedules.len(), "automations": automations.len()},
+        "actions": actions,
+        "note": "Dry-run never changes thermostat, device, group, schedule or automation state."
+    });
+    if input.log {
+        state.log("info", "flow.dry_run", &format!("Dry-run Flow {}", input.flow.name.trim()), json!({
+            "flow_id": input.flow_id, "at": at.to_rfc3339(), "actions": result.get("actions").cloned().unwrap_or(Value::Null)
+        }));
+    }
+    Ok(Json(result))
+}
+
+async fn flow_logs(State(state): State<AppState>, Path(id): Path<String>, Query(query): Query<FlowLogsQuery>) -> Result<Json<Value>, AppError> {
+    if state.db.get_flow(&id)?.is_none() { return Err(AppError::NotFound(format!("flow {id}"))); }
+    let limit = query.limit.unwrap_or(100).clamp(1, 250) as usize;
+    let events = state.db.list_events(1000)?.into_iter().filter(|event| {
+        event.metadata.get("flow_id").and_then(Value::as_str) == Some(id.as_str())
+            || event.metadata.get("automation_id").and_then(Value::as_str).map(|value| value.starts_with(&format!("flow:{id}:"))).unwrap_or(false)
+    }).take(limit).collect::<Vec<_>>();
+    Ok(Json(json!({"events": events})))
+}
@@ -256,7 +256,7 @@ async fn apply_schedule_template(State(state): State<AppState>, Path(id): Path<S
        items.push(Schedule {
            id: Uuid::new_v4().to_string(), zone_id: id.clone(), name: name.into(), enabled: true,
            weekdays: days, start_time: start.into(), end_time: end.into(), preset: preset.into(),
-            setpoint: zone.setpoint, created_at: Utc::now(), updated_at: Utc::now(),
+            setpoint: zone.setpoint, created_at: Utc::now(), updated_at: Utc::now(), flow_id: None, flow_node_id: None,
        });
    };
    let all = vec![1,2,3,4,5,6,7];
@@ -25,7 +25,7 @@ impl ScheduleInput {
    fn into_schedule(self, id: String, created_at: chrono::DateTime<Utc>) -> Schedule {
        Schedule { id, zone_id: self.zone_id, name: self.name.trim().into(), enabled: self.enabled,
            weekdays: self.weekdays, start_time: self.start_time, end_time: self.end_time,
-            preset: self.preset, setpoint: self.setpoint, created_at, updated_at: Utc::now() }
+            preset: self.preset, setpoint: self.setpoint, created_at, updated_at: Utc::now(), flow_id: None, flow_node_id: None }
    }
 }
 fn validate_schedule_set(items: &[Schedule]) -> Result<(), AppError> {
@@ -119,6 +119,7 @@ async fn update_schedule(State(state): State<AppState>, Path(id): Path<String>,
    let _cycle_guard = state.lock_zone_control_cycle().await;
    input.validate()?;
    let existing = state.db.get_schedule(&id)?.ok_or_else(|| AppError::NotFound(format!("schedule {id}")))?;
+    if existing.flow_id.is_some() { return Err(AppError::BadRequest("this schedule is generated by Flow; edit it in the Flow editor".into())); }
    if state.db.get_zone(&input.zone_id)?.is_none() { return Err(AppError::BadRequest("schedule zone does not exist".into())); }
    let old_zone_id = existing.zone_id.clone();
    let item = input.into_schedule(id.clone(), existing.created_at);
@@ -135,6 +136,7 @@ async fn delete_schedule(State(state): State<AppState>, Path(id): Path<String>)
    let _schedule_guard = state.lock_schedule_operation().await;
    let _cycle_guard = state.lock_zone_control_cycle().await;
    let existing = state.db.get_schedule(&id)?.ok_or_else(|| AppError::NotFound(format!("schedule {id}")))?;
+    if existing.flow_id.is_some() { return Err(AppError::BadRequest("this schedule is generated by Flow; delete it from the Flow editor".into())); }
    if !state.db.delete_schedule(&id)? { return Err(AppError::NotFound(format!("schedule {id}"))); }
    refresh_zone_override_boundary(&state, &existing.zone_id).await?;
    state.broadcast("schedule.deleted", json!({"id": id}));
@@ -154,7 +154,7 @@ async fn export_settings(State(state): State<AppState>) -> Result<Json<Configura
 }

 fn validate_configuration_export(export: &ConfigurationExport) -> Result<(), AppError> {
-    if export.format_version != 1 { return Err(AppError::BadRequest("unsupported configuration export version".into())); }
+    if !matches!(export.format_version, 1 | 2) { return Err(AppError::BadRequest("unsupported configuration export version".into())); }
    influxdb::validate(&export.settings.influxdb).map_err(|err| AppError::BadRequest(err.to_string()))?;
    if !matches!(export.settings.house_mode.as_str(), "cool" | "heat" | "off") {
        return Err(AppError::BadRequest("import contains an invalid house mode".into()));
@@ -164,9 +164,10 @@ fn validate_configuration_export(export: &ConfigurationExport) -> Result<(), App
    let zones: std::collections::HashSet<&str> = export.zones.iter().map(|item| item.id.as_str()).collect();
    let schedules: std::collections::HashSet<&str> = export.schedules.iter().map(|item| item.id.as_str()).collect();
    let automations: std::collections::HashSet<&str> = export.automations.iter().map(|item| item.id.as_str()).collect();
+    let flows: std::collections::HashSet<&str> = export.flows.iter().map(|item| item.id.as_str()).collect();
    if devices.len() != export.devices.len() || zones.len() != export.zones.len()
-        || schedules.len() != export.schedules.len() || automations.len() != export.automations.len()
-        || devices.contains("") || zones.contains("") || schedules.contains("") || automations.contains("")
+        || schedules.len() != export.schedules.len() || automations.len() != export.automations.len() || flows.len() != export.flows.len()
+        || devices.contains("") || zones.contains("") || schedules.contains("") || automations.contains("") || flows.contains("")
    {
        return Err(AppError::BadRequest("import contains duplicate or empty resource IDs".into()));
    }
@@ -194,6 +195,9 @@ fn validate_configuration_export(export: &ConfigurationExport) -> Result<(), App
        return Err(AppError::BadRequest("import contains a schedule referencing a missing zone".into()));
    }
    for item in &export.schedules {
+        if item.flow_id.as_deref().is_some_and(|flow_id| !flows.contains(flow_id)) {
+            return Err(AppError::BadRequest("import contains a Flow-generated schedule referencing a missing Flow".into()));
+        }
        if item.weekdays.is_empty() || item.weekdays.iter().any(|day| !(1..=7).contains(day)) {
            return Err(AppError::BadRequest("import contains invalid schedule weekdays".into()));
        }
@@ -234,10 +238,27 @@ fn validate_configuration_export(export: &ConfigurationExport) -> Result<(), App
                let at = item.at_time.as_deref().ok_or_else(|| AppError::BadRequest("import contains a time automation without at_time".into()))?;
                NaiveTime::parse_from_str(at, "%H:%M").map_err(|_| AppError::BadRequest("import contains an invalid automation time".into()))?;
            }
+            "flow" => {
+                if item.flow_id.as_deref().filter(|id| flows.contains(*id)).is_none() || item.flow_conditions.is_empty() {
+                    return Err(AppError::BadRequest("import contains an invalid Flow-generated automation".into()));
+                }
+            }
            _ => return Err(AppError::BadRequest("import contains an unsupported automation trigger".into())),
        }

-        if let Some(group_id) = item.action_group_id.as_deref().filter(|value| !value.is_empty()) {
+        if let Some(zone_id) = item.action_zone_id.as_deref().filter(|value| !value.is_empty()) {
+            if !zones.contains(zone_id) { return Err(AppError::BadRequest("import contains a Flow automation referencing a missing zone".into())); }
+            if let Some(preset) = item.action_zone_preset.as_deref() {
+                if !matches!(preset, "auto" | "custom" | "comfort" | "sleep" | "away") {
+                    return Err(AppError::BadRequest("import contains an invalid Flow thermostat preset".into()));
+                }
+            }
+            if item.action_zone_preset.as_deref() == Some("custom")
+                && item.action.target_temperature.is_some_and(|value| !(8.0..=30.0).contains(&value))
+            {
+                return Err(AppError::BadRequest("import contains an invalid Flow thermostat target".into()));
+            }
+        } else if let Some(group_id) = item.action_group_id.as_deref().filter(|value| !value.is_empty()) {
            if !groups.contains(group_id) {
                return Err(AppError::BadRequest("import contains an automation referencing a missing group".into()));
            }
@@ -246,17 +267,23 @@ fn validate_configuration_export(export: &ConfigurationExport) -> Result<(), App
                    return Err(AppError::BadRequest("import contains an invalid group automation mode".into()));
                }
            }
+            let flow_custom_group = item.flow_id.is_some() && item.action_preset.as_deref() == Some("custom");
            if let Some(preset) = item.action_preset.as_deref() {
-                if !matches!(preset, "auto" | "comfort" | "sleep" | "away") {
+                if !matches!(preset, "auto" | "comfort" | "sleep" | "away") && !(flow_custom_group && preset == "custom") {
                    return Err(AppError::BadRequest("import contains an invalid group automation preset".into()));
                }
            }
-            if item.action.target_temperature.is_some() || item.action.fan_speed.is_some()
-                || item.action.swing_vertical.is_some() || item.action.swing_horizontal.is_some()
+            if flow_custom_group {
+                let Some(target) = item.action.target_temperature else { return Err(AppError::BadRequest("import contains a Flow custom group preset without a target".into())); };
+                if !(8.0..=30.0).contains(&target) { return Err(AppError::BadRequest("import contains an invalid Flow group target".into())); }
+            } else if item.action.target_temperature.is_some() {
+                return Err(AppError::BadRequest("import contains unsupported target temperature in a group automation".into()));
+            }
+            if item.action.fan_speed.is_some() || item.action.swing_vertical.is_some() || item.action.swing_horizontal.is_some()
                || item.action.quiet.is_some() || item.action.turbo.is_some() || item.action.light.is_some()
                || item.action.air.is_some() || item.action.xfan.is_some() || item.action.health.is_some() || item.action.sleep.is_some()
            {
-                return Err(AppError::BadRequest("import contains unsupported fields in a group automation".into()));
+                return Err(AppError::BadRequest("import contains unsupported device fields in a group automation".into()));
            }
            if item.action.power.is_none() && item.action.mode.is_none() && item.action_preset.as_deref().filter(|v| !v.is_empty()).is_none() {
                return Err(AppError::BadRequest("import contains an empty group automation action".into()));
@@ -361,7 +388,7 @@ async fn import_settings(State(state): State<AppState>, Json(mut export): Json<C

    // Configuration replacement is the broadest mutation in the application. Serialize it
    // against every structural editor and every live owner that can write zone/device state.
-    // Global lock order: configuration -> automation -> house -> schedule -> zones -> devices.
+    // Global lock order: configuration -> automation -> house -> schedule -> thermostat-cycle -> zones -> devices.
    let _configuration_guard = state.lock_configuration_operation().await;
    let _automation_guard = state.lock_automation_operation().await;
    let _house_guard = state.lock_house_operation().await;
@@ -26,6 +26,7 @@ async fn build_bootstrap(state: &AppState) -> Result<Value, AppError> {
        "groups": state.db.list_groups()?,
        "schedules": state.db.list_schedules()?,
        "automations": state.db.list_automations()?,
+        "flows": state.db.list_flows()?,
        "access_tokens": state.db.list_api_tokens()?,
        "settings": public_settings(&settings),
        "outdoor_temperature": *state.outdoor_temperature.read().await,
@@ -5,7 +5,7 @@ use rusqlite::{params, Connection, OptionalExtension};
 use serde::{de::DeserializeOwned, Serialize};
 use serde_json::Value;
 use crate::{
-    models::{ApiTokenInfo, Automation, ClimateGroup, ConfigurationExport, Device, EventLog, HaReading, Reading, RuntimeSettings, Schedule, Zone, ZoneReading},
+    models::{ApiTokenInfo, Automation, ClimateGroup, ConfigurationExport, Device, EventLog, Flow, HaReading, Reading, RuntimeSettings, Schedule, Zone, ZoneReading},
    queries,
 };

@@ -19,6 +19,7 @@ pub struct Db {
 include!("db/core_devices.rs");
 include!("db/climate.rs");
 include!("db/schedules_automations.rs");
+include!("db/flows.rs");
 include!("db/device_history.rs");
 include!("db/zone_history.rs");
 include!("db/ha_history.rs");
@@ -1,7 +1,7 @@
 impl Db {
    pub fn export_configuration(&self, settings: RuntimeSettings) -> Result<ConfigurationExport> {
        Ok(ConfigurationExport {
-            format_version: 1,
+            format_version: 2,
            exported_at: Utc::now(),
            settings,
            devices: self.list_devices()?,
@@ -9,6 +9,7 @@ impl Db {
            groups: self.list_groups()?,
            schedules: self.list_schedules()?,
            automations: self.list_automations()?,
+            flows: self.list_flows()?,
        })
    }

@@ -36,6 +37,10 @@ impl Db {
            let payload = Self::to_json(item)?;
            tx.execute(queries::UPSERT_AUTOMATION, params![item.id, payload, item.updated_at.to_rfc3339()])?;
        }
+        for flow in &export.flows {
+            let payload = Self::to_json(flow)?;
+            tx.execute(queries::UPSERT_FLOW, params![flow.id, payload, flow.updated_at.to_rfc3339()])?;
+        }
        let settings_json = Self::to_json(&export.settings)?;
        tx.execute(queries::UPSERT_RUNTIME_SETTINGS, params![settings_json, Utc::now().to_rfc3339()])?;
        tx.commit()?;
@@ -0,0 +1,38 @@
+impl Db {
+    pub fn list_flows(&self) -> Result<Vec<Flow>> {
+        self.list_payloads(queries::LIST_FLOWS)
+    }
+
+    pub fn get_flow(&self, id: &str) -> Result<Option<Flow>> {
+        self.get_payload(queries::GET_FLOW, id)
+    }
+
+    pub fn replace_flow_outputs(&self, flow: &Flow, schedules: &[Schedule], automations: &[Automation]) -> Result<()> {
+        let mut conn = self.lock()?;
+        let tx = conn.transaction()?;
+        tx.execute(queries::DELETE_SCHEDULES_BY_FLOW_ID, [flow.id.as_str()])?;
+        tx.execute(queries::DELETE_AUTOMATIONS_BY_FLOW_ID, [flow.id.as_str()])?;
+        for schedule in schedules {
+            let payload = Self::to_json(schedule)?;
+            tx.execute(queries::UPSERT_SCHEDULE, params![schedule.id, schedule.zone_id, payload, schedule.updated_at.to_rfc3339()])?;
+        }
+        for item in automations {
+            let payload = Self::to_json(item)?;
+            tx.execute(queries::UPSERT_AUTOMATION, params![item.id, payload, item.updated_at.to_rfc3339()])?;
+        }
+        let payload = Self::to_json(flow)?;
+        tx.execute(queries::UPSERT_FLOW, params![flow.id, payload, flow.updated_at.to_rfc3339()])?;
+        tx.commit()?;
+        Ok(())
+    }
+
+    pub fn delete_flow(&self, id: &str) -> Result<bool> {
+        let mut conn = self.lock()?;
+        let tx = conn.transaction()?;
+        tx.execute(queries::DELETE_SCHEDULES_BY_FLOW_ID, [id])?;
+        tx.execute(queries::DELETE_AUTOMATIONS_BY_FLOW_ID, [id])?;
+        let changed = tx.execute(queries::DELETE_FLOW, [id])? > 0;
+        tx.commit()?;
+        Ok(changed)
+    }
+}
@@ -1,14 +1,15 @@

 pub fn automation_action_conflicts_with_thermostat(command: &DeviceCommand) -> bool {
-    // Power/mode/target are translated by apply_automatic_device_action into durable zone
-    // state, so they do not fight the thermostat. Fan/quiet/sleep are thermostat outputs with
-    // no independent zone override model; accepting them as one-shot direct automation would
-    // let the next thermostat cycle immediately overwrite them.
-    command.fan_speed.is_some() || command.quiet.is_some() || command.sleep.is_some()
+    // Power/auto-heat-cool/target are translated by apply_automatic_device_action into durable
+    // zone state, so they do not fight the thermostat. Dry/fan HVAC modes do not belong to the
+    // thermostat domain. Fan/quiet/sleep are outputs continuously owned by the regulator and
+    // have no independent zone override model, so a one-shot automation would be overwritten.
+    command.mode.as_deref().is_some_and(|mode| !matches!(mode, "auto" | "heat" | "cool"))
+        || command.fan_speed.is_some() || command.quiet.is_some() || command.sleep.is_some()
 }

-fn device_has_enabled_thermostat_zone(device_id: &str, zones: &[Zone]) -> bool {
-    zones.iter().any(|zone| zone.device_id == device_id && zone.enabled)
+fn device_has_thermostat_zone(device_id: &str, zones: &[Zone]) -> bool {
+    zones.iter().any(|zone| zone.device_id == device_id)
 }

 async fn run_automations(state: &AppState) -> Result<()> {
@@ -27,6 +28,13 @@ async fn run_automations(state: &AppState) -> Result<()> {
            "temperature_below" => find_temperature(&devices, item.trigger_device_id.as_deref())
                .zip(item.threshold).map(|(t, threshold)| t < threshold).unwrap_or(false),
            "time" => time_automation_due(&item, Local::now()),
+            "flow" => match flow_conditions_match(state, &devices, &item.flow_conditions).await {
+                Ok(value) => value,
+                Err(err) => {
+                    state.log("warn", "flow.condition_error", &format!("Flow automation {} condition evaluation failed: {}", item.name, err), json!({"automation_id": item.id, "flow_id": item.flow_id, "flow_node_id": item.flow_node_id}));
+                    false
+                }
+            },
            _ => false,
        };
        if !should_fire { continue; }
@@ -44,41 +52,49 @@ async fn run_automations(state: &AppState) -> Result<()> {
        let zones = state.db.list_zones()?;
        let groups = state.db.list_groups()?;

-        if item.action_group_id.is_none()
+        if item.action_group_id.is_none() && item.action_zone_id.is_none()
            && device_blocked_by_disabled_zone(&item.action_device_id, &zones)
            && item.action.power != Some(true)
        {
            state.log("info", "automation.blocked_by_zone", &format!("Automation {} suppressed by disabled zone", item.name), json!({
-                "automation_id": item.id, "device_id": item.action_device_id
+                "automation_id": item.id, "device_id": item.action_device_id, "flow_id": item.flow_id, "flow_node_id": item.flow_node_id
            }));
            continue;
        }
-        if item.action_group_id.is_none() && device_blocked_by_manual_override(&item.action_device_id, &zones) {
+        if item.action_group_id.is_none() && item.action_zone_id.is_none() && device_blocked_by_manual_override(&item.action_device_id, &zones) {
            state.log("info", "automation.blocked_by_manual_override", &format!("Automation {} suppressed by manual device control", item.name), json!({
-                "automation_id": item.id, "device_id": item.action_device_id
+                "automation_id": item.id, "device_id": item.action_device_id, "flow_id": item.flow_id, "flow_node_id": item.flow_node_id
            }));
            continue;
        }
-        if item.action_group_id.is_none() && device_blocked_by_local_thermostat(&item.action_device_id, &zones) {
+        if item.action_group_id.is_none() && item.action_zone_id.is_none() && device_blocked_by_local_thermostat(&item.action_device_id, &zones) {
            state.log("info", "automation.blocked_by_local_thermostat", &format!("Automation {} suppressed by local thermostat ownership", item.name), json!({
-                "automation_id": item.id, "device_id": item.action_device_id
+                "automation_id": item.id, "device_id": item.action_device_id, "flow_id": item.flow_id, "flow_node_id": item.flow_node_id
            }));
            continue;
        }
-        if item.action_group_id.is_none()
-            && device_has_enabled_thermostat_zone(&item.action_device_id, &zones)
+        if item.action_group_id.is_none() && item.action_zone_id.is_none() && device_blocked_by_temporary_thermostat(&item.action_device_id, &zones) {
+            state.log("info", "automation.blocked_by_temporary_thermostat", &format!("Automation {} suppressed by Temporary Quick Thermostat ownership", item.name), json!({
+                "automation_id": item.id, "device_id": item.action_device_id, "flow_id": item.flow_id, "flow_node_id": item.flow_node_id
+            }));
+            continue;
+        }
+        if item.action_group_id.is_none() && item.action_zone_id.is_none()
+            && device_has_thermostat_zone(&item.action_device_id, &zones)
            && automation_action_conflicts_with_thermostat(&item.action)
        {
            // Fan/quiet/sleep are outputs continuously managed by the thermostat. Unlike
            // power/mode/target they cannot be translated into durable zone state, so a direct
            // automation would be immediately overwritten by the next thermostat cycle.
            state.log("warn", "automation.blocked_by_thermostat_owner", &format!("Automation {} suppressed because the device is owned by an enabled thermostat zone", item.name), json!({
-                "automation_id": item.id, "device_id": item.action_device_id
+                "automation_id": item.id, "device_id": item.action_device_id, "flow_id": item.flow_id, "flow_node_id": item.flow_node_id
            }));
            continue;
        }

-        let target_devices: Vec<String> = if let Some(group_id) = item.action_group_id.as_deref() {
+        let target_devices: Vec<String> = if let Some(zone_id) = item.action_zone_id.as_deref() {
+            zones.iter().find(|zone| zone.id == zone_id).map(|zone| vec![zone.device_id.clone()]).unwrap_or_default()
+        } else if let Some(group_id) = item.action_group_id.as_deref() {
            groups.iter().find(|group| group.id == group_id)
                .map(|group| group.zone_ids.iter()
                    .filter_map(|zone_id| zones.iter().find(|zone| &zone.id == zone_id).map(|zone| zone.device_id.clone()))
@@ -90,6 +106,8 @@ async fn run_automations(state: &AppState) -> Result<()> {
        if target_devices.iter().any(|device_id| claimed_devices.contains(device_id)) {
            state.log("warn", "automation.conflict", &format!("Automation {} skipped because an older due automation already claimed the same target", item.name), json!({
                "automation_id": item.id,
+                "flow_id": item.flow_id,
+                "flow_node_id": item.flow_node_id,
                "group_id": item.action_group_id,
                "device_id": item.action_device_id,
                "target_devices": target_devices,
@@ -97,20 +115,22 @@ async fn run_automations(state: &AppState) -> Result<()> {
            continue;
        }

-        let result: Result<bool, AppError> = if let Some(group_id) = item.action_group_id.as_deref() {
+        let result: Result<bool, AppError> = if let Some(zone_id) = item.action_zone_id.as_deref() {
+            apply_flow_zone_action(state, zone_id, item.action_zone_preset.as_deref(), &item.action).await
+        } else if let Some(group_id) = item.action_group_id.as_deref() {
            let group_mode = item.action.mode.as_deref().map(|mode| if mode == "auto" { "house".to_string() } else { mode.to_string() });
            control_group(state, group_id, GroupControlPatch {
                power: item.action.power,
                mode: group_mode,
                preset: item.action_preset.clone(),
-                setpoint: None,
+                setpoint: item.action.target_temperature,
            }, "automation.group").await.map(|value| !value.get("suppressed").and_then(Value::as_bool).unwrap_or(false))
        } else {
            match apply_automatic_device_action(state, &item.action_device_id, item.action.clone()).await {
                Ok(Some(_)) => Ok(true),
                Ok(None) => {
                    state.log("info", "automation.blocked_by_fresh_ownership", &format!("Automation {} was suppressed after ownership changed", item.name), json!({
-                        "automation_id": item.id, "device_id": item.action_device_id
+                        "automation_id": item.id, "device_id": item.action_device_id, "flow_id": item.flow_id, "flow_node_id": item.flow_node_id
                    }));
                    Ok(false)
                }
@@ -124,12 +144,18 @@ async fn run_automations(state: &AppState) -> Result<()> {
                item.updated_at = Utc::now();
                state.db.save_automation(&item)?;
                state.log("info", "automation.fired", &format!("Automation {} fired", item.name), json!({
-                    "automation_id": item.id, "group_id": item.action_group_id, "device_id": item.action_device_id
+                    "automation_id": item.id, "flow_id": item.flow_id, "flow_node_id": item.flow_node_id, "group_id": item.action_group_id, "device_id": item.action_device_id
                }));
            }
            Ok(false) => {
                // Ownership suppression is not an execution. Do not consume cooldown (M3),
                // so a still-valid trigger may run as soon as the higher-priority owner leaves.
+                if item.flow_id.is_some() {
+                    state.log("info", "flow.action_suppressed", &format!("Flow action {} was suppressed by current ownership", item.name), json!({
+                        "automation_id": item.id, "flow_id": item.flow_id, "flow_node_id": item.flow_node_id,
+                        "group_id": item.action_group_id, "zone_id": item.action_zone_id, "device_id": item.action_device_id
+                    }));
+                }
            }
            Err(err) => {
                // A failed action is still an execution attempt. Apply the configured cooldown
@@ -137,7 +163,7 @@ async fn run_automations(state: &AppState) -> Result<()> {
                item.last_fired_at = Some(Utc::now());
                item.updated_at = Utc::now();
                state.db.save_automation(&item)?;
-                state.log("error", "automation.error", &err.to_string(), json!({"automation_id": item.id}));
+                state.log("error", "automation.error", &err.to_string(), json!({"automation_id": item.id, "flow_id": item.flow_id, "flow_node_id": item.flow_node_id}));
            }
        }
    }
@@ -156,6 +182,11 @@ fn device_blocked_by_local_thermostat(device_id: &str, zones: &[Zone]) -> bool {
    zones.iter().any(|zone| zone.device_id == device_id && zone.local_thermostat_power.is_some())
 }

+fn device_blocked_by_temporary_thermostat(device_id: &str, zones: &[Zone]) -> bool {
+    let now = Utc::now();
+    zones.iter().any(|zone| zone.device_id == device_id && temporary_quick_thermostat_is_active(zone, now.clone()))
+}
+
 fn find_temperature(devices: &[Device], device_id: Option<&str>) -> Option<f64> {
    let id = device_id?;
    // Never fire a temperature automation from stale cached data of an offline/disabled unit.
@@ -182,3 +213,361 @@ fn time_automation_due(item: &Automation, now: DateTime<Local>) -> bool {
    true
 }

+
+
+fn flow_compare(actual: f64, operator: &str, expected: f64) -> bool {
+    match operator { "lt" => actual < expected, "lte" => actual <= expected, "gt" => actual > expected, "gte" => actual >= expected, "eq" => (actual - expected).abs() < 0.0001, "neq" => (actual - expected).abs() >= 0.0001, _ => false }
+}
+
+fn flow_value_text(value: &Value) -> String {
+    match value {
+        Value::String(v) => v.clone(),
+        Value::Bool(v) => v.to_string(),
+        Value::Number(v) => v.to_string(),
+        Value::Null => "null".into(),
+        other => other.to_string(),
+    }
+}
+
+fn flow_compare_value(actual: &Value, operator: &str, expected: &Value) -> bool {
+    if let (Some(a), Some(e)) = (actual.as_f64(), expected.as_f64()) {
+        return flow_compare(a, operator, e);
+    }
+    if matches!(operator, "lt" | "lte" | "gt" | "gte") {
+        let a = flow_value_text(actual).parse::<f64>().ok();
+        let e = flow_value_text(expected).parse::<f64>().ok();
+        return a.zip(e).map(|(a, e)| flow_compare(a, operator, e)).unwrap_or(false);
+    }
+    let equal = flow_value_text(actual).eq_ignore_ascii_case(&flow_value_text(expected));
+    if operator == "neq" { !equal } else { equal }
+}
+
+fn flow_device_state_value(device: &Device, field: &str) -> Option<Value> {
+    Some(match field {
+        "enabled" => json!(device.enabled),
+        "online" => json!(device.online),
+        "power" => json!(device.power),
+        "mode" => json!(device.mode),
+        "fan_speed" => json!(device.fan_speed),
+        "swing_vertical" => json!(device.swing_vertical),
+        "swing_horizontal" => json!(device.swing_horizontal),
+        "quiet" => json!(device.quiet),
+        "turbo" => json!(device.turbo),
+        "light" => json!(device.light),
+        "air" => json!(device.air),
+        "xfan" => json!(device.xfan),
+        "health" => json!(device.health),
+        "sleep" => json!(device.sleep),
+        _ => return None,
+    })
+}
+
+fn flow_zone_state_value(zone: &Zone, field: &str) -> Option<Value> {
+    Some(match field {
+        "enabled" => json!(zone.enabled),
+        "mode" => json!(zone.mode),
+        "active_preset" => json!(zone.active_preset),
+        "demand" => json!(zone.demand),
+        "control_owner" => json!(zone.control_owner),
+        "device_manual_override" => json!(zone.device_manual_override),
+        "local_thermostat_power" => zone.local_thermostat_power.map(Value::Bool).unwrap_or(Value::Null),
+        _ => return None,
+    })
+}
+
+async fn flow_leaf_observation(
+    state: &AppState,
+    devices: &[Device],
+    zones: &[Zone],
+    outdoor_temperature: Option<f64>,
+    condition: &crate::models::FlowCondition,
+    now: &DateTime<Local>,
+    settings: &crate::models::RuntimeSettings,
+    overrides: &HashMap<String, Value>,
+) -> Result<(bool, Value), AppError> {
+    let c = &condition.config;
+    let override_value = overrides.get(&condition.id).cloned();
+    let (matched, actual) = match condition.kind.as_str() {
+        "weekday" => {
+            let actual = override_value.unwrap_or_else(|| json!(now.weekday().number_from_monday()));
+            let day = actual.as_u64().unwrap_or(now.weekday().number_from_monday() as u64);
+            let matched = c.get("days").and_then(Value::as_array)
+                .map(|days| days.iter().filter_map(Value::as_u64).any(|expected| expected == day)).unwrap_or(false);
+            (matched, json!(day))
+        }
+        "time_range" => {
+            let actual = override_value.and_then(|v| v.as_str().map(str::to_string)).unwrap_or_else(|| now.format("%H:%M").to_string());
+            let current = NaiveTime::parse_from_str(&actual, "%H:%M").unwrap_or_else(|_| now.time());
+            let start = c.get("start").and_then(Value::as_str).and_then(|v| NaiveTime::parse_from_str(v, "%H:%M").ok());
+            let end = c.get("end").and_then(Value::as_str).and_then(|v| NaiveTime::parse_from_str(v, "%H:%M").ok());
+            let matched = match (start, end) {
+                (Some(start), Some(end)) if start == end => true,
+                (Some(start), Some(end)) if start < end => current >= start && current < end,
+                (Some(start), Some(end)) => current >= start || current < end,
+                _ => false,
+            };
+            (matched, json!(actual))
+        }
+        "date_range" => {
+            let actual = override_value.and_then(|v| v.as_str().map(str::to_string)).unwrap_or_else(|| now.date_naive().format("%Y-%m-%d").to_string());
+            let current = chrono::NaiveDate::parse_from_str(&actual, "%Y-%m-%d").unwrap_or_else(|_| now.date_naive());
+            let start = c.get("start").and_then(Value::as_str).and_then(|v| chrono::NaiveDate::parse_from_str(v, "%Y-%m-%d").ok());
+            let end = c.get("end").and_then(Value::as_str).and_then(|v| chrono::NaiveDate::parse_from_str(v, "%Y-%m-%d").ok());
+            (matches!((start, end), (Some(a), Some(b)) if current >= a && current <= b), json!(actual))
+        }
+        "outdoor_temperature" => {
+            let actual = if let Some(v) = override_value { v.as_f64() } else { outdoor_temperature };
+            let expected = c.get("value").and_then(Value::as_f64);
+            (actual.zip(expected).map(|(a, e)| flow_compare(a, c.get("operator").and_then(Value::as_str).unwrap_or("lt"), e)).unwrap_or(false), actual.map_or(Value::Null, |v| json!(v)))
+        }
+        "device_temperature" => {
+            let id = c.get("device_id").and_then(Value::as_str).unwrap_or("");
+            let actual = if let Some(v) = override_value { v.as_f64() } else { find_temperature(devices, Some(id)) };
+            let expected = c.get("value").and_then(Value::as_f64);
+            (actual.zip(expected).map(|(a, e)| flow_compare(a, c.get("operator").and_then(Value::as_str).unwrap_or("lt"), e)).unwrap_or(false), actual.map_or(Value::Null, |v| json!(v)))
+        }
+        "zone_temperature" => {
+            let id = c.get("zone_id").and_then(Value::as_str).unwrap_or("");
+            let actual = if let Some(v) = override_value { v.as_f64() } else { zones.iter().find(|zone| zone.id == id).and_then(|zone| zone.current_temperature) };
+            let expected = c.get("value").and_then(Value::as_f64);
+            (actual.zip(expected).map(|(a, e)| flow_compare(a, c.get("operator").and_then(Value::as_str).unwrap_or("lt"), e)).unwrap_or(false), actual.map_or(Value::Null, |v| json!(v)))
+        }
+        "ha_state" => {
+            let entity = c.get("entity_id").and_then(Value::as_str).unwrap_or("");
+            let actual = match override_value {
+                Some(value) => value,
+                None => match home_assistant::read_state(&state.http, &settings.home_assistant, Some(entity)).await {
+                    Ok(value) => json!(value),
+                    Err(err) => return Ok((false, json!({"error": err.to_string(), "entity_id": entity}))),
+                },
+            };
+            let expected = c.get("value").cloned().unwrap_or(Value::Null);
+            (flow_compare_value(&actual, c.get("operator").and_then(Value::as_str).unwrap_or("eq"), &expected), actual)
+        }
+        "ha_numeric" => {
+            let entity = c.get("entity_id").and_then(Value::as_str).unwrap_or("");
+            let actual = match override_value {
+                Some(value) => value,
+                None => {
+                    let raw = match home_assistant::read_state(&state.http, &settings.home_assistant, Some(entity)).await {
+                        Ok(value) => value,
+                        Err(err) => return Ok((false, json!({"error": err.to_string(), "entity_id": entity}))),
+                    };
+                    match raw.parse::<f64>() {
+                        Ok(value) => json!(value),
+                        Err(_) => return Ok((false, json!({"error": "non_numeric_state", "entity_id": entity, "state": raw}))),
+                    }
+                }
+            };
+            let expected = c.get("value").cloned().unwrap_or(Value::Null);
+            (flow_compare_value(&actual, c.get("operator").and_then(Value::as_str).unwrap_or("lt"), &expected), actual)
+        }
+        "ha_attribute" => {
+            let entity = c.get("entity_id").and_then(Value::as_str).unwrap_or("");
+            let attribute = c.get("attribute").and_then(Value::as_str).unwrap_or("");
+            let actual = match override_value {
+                Some(value) => value,
+                None => {
+                    let payload = match home_assistant::read_entity(&state.http, &settings.home_assistant, Some(entity)).await {
+                        Ok(value) => value,
+                        Err(err) => return Ok((false, json!({"error": err.to_string(), "entity_id": entity, "attribute": attribute}))),
+                    };
+                    let Some(value) = payload.get("attributes").and_then(|attrs| attrs.get(attribute)).cloned() else {
+                        return Ok((false, json!({"error": "missing_attribute", "entity_id": entity, "attribute": attribute})));
+                    };
+                    value
+                }
+            };
+            let expected = c.get("value").cloned().unwrap_or(Value::Null);
+            (flow_compare_value(&actual, c.get("operator").and_then(Value::as_str).unwrap_or("eq"), &expected), actual)
+        }
+        "ha_available" => {
+            let entity = c.get("entity_id").and_then(Value::as_str).unwrap_or("");
+            let actual = match override_value {
+                Some(value) => value,
+                None => match home_assistant::read_state(&state.http, &settings.home_assistant, Some(entity)).await {
+                    Ok(value) => Value::String(value),
+                    Err(err) => return Ok((false, json!({"error": err.to_string(), "entity_id": entity}))),
+                },
+            };
+            let matched = actual.as_bool().unwrap_or_else(|| actual.as_str().map(|value| {
+                let value = value.trim();
+                !value.is_empty() && !value.eq_ignore_ascii_case("unknown") && !value.eq_ignore_ascii_case("unavailable")
+            }).unwrap_or(false));
+            (matched, actual)
+        }
+        "house_mode" => {
+            let actual = override_value.unwrap_or_else(|| json!(settings.house_mode));
+            let expected = c.get("value").cloned().unwrap_or(Value::Null);
+            (flow_compare_value(&actual, c.get("operator").and_then(Value::as_str).unwrap_or("eq"), &expected), actual)
+        }
+        "device_state" => {
+            let id = c.get("device_id").and_then(Value::as_str).unwrap_or("");
+            let field = c.get("field").and_then(Value::as_str).unwrap_or("");
+            let actual = override_value.unwrap_or_else(|| devices.iter().find(|device| device.id == id).and_then(|device| flow_device_state_value(device, field)).unwrap_or(Value::Null));
+            let expected = c.get("value").cloned().unwrap_or(Value::Null);
+            (flow_compare_value(&actual, c.get("operator").and_then(Value::as_str).unwrap_or("eq"), &expected), actual)
+        }
+        "zone_state" => {
+            let id = c.get("zone_id").and_then(Value::as_str).unwrap_or("");
+            let field = c.get("field").and_then(Value::as_str).unwrap_or("");
+            let actual = override_value.unwrap_or_else(|| zones.iter().find(|zone| zone.id == id).and_then(|zone| flow_zone_state_value(zone, field)).unwrap_or(Value::Null));
+            let expected = c.get("value").cloned().unwrap_or(Value::Null);
+            (flow_compare_value(&actual, c.get("operator").and_then(Value::as_str).unwrap_or("eq"), &expected), actual)
+        }
+        "group_state" => {
+            let id = c.get("group_id").and_then(Value::as_str).unwrap_or("");
+            let field = c.get("field").and_then(Value::as_str).unwrap_or("");
+            let actual = override_value.unwrap_or_else(|| state.db.get_group(id).ok().flatten().and_then(|group| match field {
+                "power_enabled" => Some(json!(group.power_enabled)),
+                _ => None,
+            }).unwrap_or(Value::Null));
+            let expected = c.get("value").cloned().unwrap_or(Value::Null);
+            (flow_compare_value(&actual, c.get("operator").and_then(Value::as_str).unwrap_or("eq"), &expected), actual)
+        }
+        "night_mode" => {
+            let actual = override_value.unwrap_or_else(|| json!(night_mode_active(&settings.night_mode, now.time())));
+            (actual.as_bool().unwrap_or(false), actual)
+        }
+        "constant" => {
+            let actual = override_value.unwrap_or_else(|| c.get("value").cloned().unwrap_or(Value::Bool(false)));
+            (actual.as_bool().unwrap_or(false), actual)
+        }
+        _ => (false, Value::Null),
+    };
+    Ok((matched, actual))
+}
+
+pub async fn evaluate_flow_conditions_trace(
+    state: &AppState,
+    devices: &[Device],
+    conditions: &[crate::models::FlowCondition],
+    now: DateTime<Local>,
+    overrides: &HashMap<String, Value>,
+) -> Result<(bool, Vec<Value>), AppError> {
+    if conditions.is_empty() { return Ok((false, Vec::new())); }
+    let settings = state.settings.read().await.clone();
+    let zones = state.db.list_zones()?;
+    let outdoor_temperature = *state.outdoor_temperature.read().await;
+    let mut trace = Vec::new();
+
+    if conditions.iter().all(|condition| condition.id.is_empty()) {
+        let mut final_value = true;
+        for condition in conditions {
+            let (matched, actual) = flow_leaf_observation(state, devices, &zones, outdoor_temperature, condition, &now, &settings, overrides).await?;
+            final_value &= matched;
+            trace.push(json!({"node_id": condition.id, "kind": condition.kind, "matched": matched, "actual": actual, "expected": condition.config.get("value")}));
+        }
+        return Ok((final_value, trace));
+    }
+
+    let mut values = HashMap::<String, bool>::new();
+    let mut final_id = None::<String>;
+    for condition in conditions {
+        if condition.id.is_empty() { return Ok((false, trace)); }
+        let (matched, actual) = match condition.kind.as_str() {
+            "logic_and" => {
+                let value = !condition.inputs.is_empty() && condition.inputs.iter().all(|id| values.get(id).copied().unwrap_or(false));
+                (value, json!(condition.inputs.iter().map(|id| values.get(id).copied().unwrap_or(false)).collect::<Vec<_>>()))
+            }
+            "logic_or" => {
+                let value = !condition.inputs.is_empty() && condition.inputs.iter().any(|id| values.get(id).copied().unwrap_or(false));
+                (value, json!(condition.inputs.iter().map(|id| values.get(id).copied().unwrap_or(false)).collect::<Vec<_>>()))
+            }
+            "logic_not" => {
+                let value = condition.inputs.len() == 1 && !values.get(&condition.inputs[0]).copied().unwrap_or(false);
+                (value, json!(condition.inputs.first().and_then(|id| values.get(id)).copied()))
+            }
+            _ if flow_condition_kind_runtime(&condition.kind) => {
+                let predecessors_match = condition.inputs.iter().all(|id| values.get(id).copied().unwrap_or(false));
+                let (leaf, actual) = flow_leaf_observation(state, devices, &zones, outdoor_temperature, condition, &now, &settings, overrides).await?;
+                (predecessors_match && leaf, actual)
+            }
+            _ => (false, Value::Null),
+        };
+        values.insert(condition.id.clone(), matched);
+        final_id = Some(condition.id.clone());
+        trace.push(json!({
+            "node_id": condition.id,
+            "kind": condition.kind,
+            "matched": matched,
+            "actual": actual,
+            "expected": condition.config.get("value"),
+            "inputs": condition.inputs
+        }));
+    }
+    Ok((final_id.and_then(|id| values.get(&id).copied()).unwrap_or(false), trace))
+}
+
+async fn flow_conditions_match(state: &AppState, devices: &[Device], conditions: &[crate::models::FlowCondition]) -> Result<bool, AppError> {
+    let overrides = HashMap::new();
+    evaluate_flow_conditions_trace(state, devices, conditions, Local::now(), &overrides).await.map(|(matched, _)| matched)
+}
+
+fn flow_condition_kind_runtime(kind: &str) -> bool {
+    matches!(kind,
+        "weekday" | "time_range" | "date_range" | "outdoor_temperature" | "device_temperature" |
+        "zone_temperature" | "ha_state" | "ha_numeric" | "ha_attribute" | "ha_available" | "house_mode" |
+        "device_state" | "zone_state" | "group_state" | "night_mode" | "constant"
+    )
+}
+
+async fn apply_flow_zone_action(state: &AppState, zone_id: &str, preset: Option<&str>, action: &DeviceCommand) -> Result<bool, AppError> {
+    let _schedule_guard = state.lock_schedule_operation().await;
+    // Match the canonical thermostat ordering used by Web/HA zone control. This prevents
+    // a Flow action from racing a thermostat arbitration cycle that already holds a stale snapshot.
+    let _cycle_guard = state.lock_zone_control_cycle().await;
+    let _zone_guard = state.lock_zone_operation(zone_id).await;
+    let Some(mut zone) = state.db.get_zone(zone_id)? else { return Err(AppError::NotFound(format!("zone {zone_id}"))); };
+    if zone.device_manual_override || zone.local_thermostat_power.is_some() || temporary_quick_thermostat_is_active(&zone, Utc::now()) { return Ok(false); }
+    // Match the existing automatic-device ownership semantics: a disabled thermostat zone
+    // remains an explicit gate unless this Flow action is the actor re-enabling it.
+    if !zone.enabled && action.power != Some(true) { return Ok(false); }
+    let device_id = zone.device_id.clone();
+    if let Some(power) = action.power { zone.enabled = power; }
+    if let Some(mode) = action.mode.as_deref() {
+        match mode { "auto" => zone.inherit_house_mode = true, "heat" | "cool" => { zone.mode = mode.to_string(); zone.inherit_house_mode = false; }, _ => return Err(AppError::BadRequest("unsupported Flow thermostat mode".into())) }
+    }
+    match preset.unwrap_or("auto") {
+        "auto" => { zone.manual_preset = None; zone.manual_setpoint = None; zone.manual_override_until = None; }
+        "custom" => {
+            let target = action.target_temperature.ok_or_else(|| AppError::BadRequest("Flow custom thermostat action has no target".into()))?;
+            zone.manual_preset = Some("custom".into()); zone.manual_setpoint = Some((target.clamp(8.0,30.0)*2.0).round()/2.0);
+            zone.manual_override_until = next_schedule_boundary_utc(&zone.id, &state.db.list_schedules()?, Local::now());
+        }
+        value @ ("comfort" | "sleep" | "away") => {
+            zone.manual_preset = Some(value.into()); zone.manual_setpoint = None;
+            zone.manual_override_until = next_schedule_boundary_utc(&zone.id, &state.db.list_schedules()?, Local::now());
+        }
+        _ => return Err(AppError::BadRequest("unsupported Flow thermostat preset".into())),
+    }
+    rearm_compressor_queue(&mut zone);
+    if action.power == Some(false) {
+        zone.demand = false;
+        zone.demand_since = None;
+        zone.effective_mode = "off".into();
+        zone.device_setpoint = None;
+    }
+    zone.revision = zone.revision.saturating_add(1);
+    zone.updated_at = Utc::now();
+    zone.control_owner = "automation".into();
+    zone.control_source = "automation.flow".into();
+    zone.control_reason = "Visual Flow automation".into();
+    let schedules = state.db.list_schedules()?;
+    let house_mode = state.settings.read().await.house_mode.clone();
+    refresh_control_ownership(&mut zone, true);
+    if zone.control_owner == "automation" {
+        zone.control_source = "automation.flow".into();
+        zone.control_reason = "Visual Flow automation".into();
+    }
+    refresh_zone_runtime_target(&mut zone, &schedules, &house_mode);
+    state.db.save_zone(&zone)?; state.broadcast("zone.updated", serde_json::to_value(&zone)?); state.wake_zone_control();
+    if action.power == Some(false) {
+        // Disabled zones are intentionally skipped by the normal thermostat cycle. Perform the
+        // physical OFF under the canonical zone -> device lock order so the durable Flow intent
+        // cannot leave a unit running and polling/manual control cannot interleave with the frame.
+        let _device_guard = state.lock_device_operation(&device_id).await;
+        send_command_locked_forced(state, &device_id, DeviceCommand { power: Some(false), ..Default::default() }).await?;
+    }
+    Ok(true)
+}
@@ -4,6 +4,7 @@ pub async fn build_control_plan(state: &AppState) -> Result<ControlPlan, AppErro
    let devices = state.db.list_devices()?;
    let zones = state.db.list_zones()?;
    let groups = state.db.list_groups()?;
+    let zone_names: HashMap<String, String> = zones.iter().map(|zone| (zone.id.clone(), zone.name.clone())).collect();
    let house_preset = zones.first().and_then(|first| {
        let first_preset = first.manual_preset.as_deref().unwrap_or("auto");
        zones.iter().all(|zone| zone.manual_preset.as_deref().unwrap_or("auto") == first_preset)
@@ -111,10 +112,13 @@ pub async fn build_control_plan(state: &AppState) -> Result<ControlPlan, AppErro
    }
    let mut rules = Vec::new();
    for item in state.db.list_automations()? {
+        let action_zone_name = item.action_zone_id.as_deref()
+            .and_then(|id| zone_names.get(id))
+            .cloned();
        let action_group_name = item.action_group_id.as_deref()
            .and_then(|id| groups.iter().find(|group| group.id == id))
            .map(|group| group.name.clone());
-        let action_name = action_group_name.clone().unwrap_or_else(|| {
+        let action_name = action_zone_name.or_else(|| action_group_name.clone()).unwrap_or_else(|| {
            devices.iter().find(|device| device.id == item.action_device_id)
                .map(|device| device.name.clone())
                .unwrap_or_else(|| item.action_device_id.clone())
@@ -17,7 +17,7 @@ mod tests {
        let item = Schedule {
            id: "1".into(), zone_id: "z".into(), name: "night".into(), enabled: true,
            weekdays: vec![1], start_time: "22:00".into(), end_time: "06:00".into(), preset: "custom".into(), setpoint: 20.0,
-            created_at: Utc::now(), updated_at: Utc::now(),
+            created_at: Utc::now(), updated_at: Utc::now(), flow_id: None, flow_node_id: None,
        };
        assert!(schedule_active(&item, now));
    }
@@ -26,7 +26,7 @@ mod tests {
        Schedule {
            id: id.into(), zone_id: "z".into(), name: id.into(), enabled: true,
            weekdays, start_time: start.into(), end_time: end.into(), preset: "comfort".into(), setpoint: 21.0,
-            created_at: Utc::now(), updated_at: Utc::now(),
+            created_at: Utc::now(), updated_at: Utc::now(), flow_id: None, flow_node_id: None,
        }
    }

@@ -94,7 +94,7 @@ mod tests {
            trigger_device_id: None, threshold: None, at_time: Some("10:15".into()),
            action_device_id: "d".into(), action_group_id: None, action_preset: None,
            action: DeviceCommand { power: Some(true), ..Default::default() }, cooldown_seconds: 30,
-            last_fired_at: None, created_at: Utc::now(), updated_at: Utc::now(),
+            last_fired_at: None, action_zone_id: None, action_zone_preset: None, flow_conditions: vec![], flow_id: None, flow_node_id: None, created_at: Utc::now(), updated_at: Utc::now(),
        };
        assert!(time_automation_due(&item, now.clone()));
        item.last_fired_at = Some((now.clone() - chrono::Duration::seconds(35)).with_timezone(&Utc));
@@ -173,6 +173,9 @@ mod tests {
        assert!(!automation_action_conflicts_with_thermostat(&DeviceCommand { target_temperature: Some(22.0), ..Default::default() }));
        assert!(automation_action_conflicts_with_thermostat(&DeviceCommand { fan_speed: Some(3), ..Default::default() }));
        assert!(automation_action_conflicts_with_thermostat(&DeviceCommand { quiet: Some(true), ..Default::default() }));
+        assert!(automation_action_conflicts_with_thermostat(&DeviceCommand { mode: Some("fan".into()), ..Default::default() }));
+        assert!(automation_action_conflicts_with_thermostat(&DeviceCommand { mode: Some("dry".into()), ..Default::default() }));
+        assert!(!automation_action_conflicts_with_thermostat(&DeviceCommand { mode: Some("heat".into()), ..Default::default() }));
        assert!(!automation_action_conflicts_with_thermostat(&DeviceCommand { light: Some(false), turbo: Some(true), ..Default::default() }));
    }

@@ -195,6 +198,14 @@ mod tests {
        ));
    }

+    #[test]
+    fn active_temporary_thermostat_blocks_direct_automation() {
+        let now = Utc::now();
+        let mut zone = test_zone("device");
+        zone.temporary_quick_thermostat = Some(temporary_session(now));
+        assert!(device_blocked_by_temporary_thermostat(&zone.device_id, std::slice::from_ref(&zone)));
+    }
+
    #[test]
    fn local_thermostat_resume_clears_only_local_quick_control_state() {
        let mut zone = test_zone("device");
@@ -49,6 +49,7 @@ async fn send_automatic_device_command_if_owned(
    if device_blocked_by_disabled_zone(device_id, &zones)
        || device_blocked_by_manual_override(device_id, &zones)
        || device_blocked_by_local_thermostat(device_id, &zones)
+        || device_blocked_by_temporary_thermostat(device_id, &zones)
    {
        return Ok(None);
    }
@@ -63,6 +64,9 @@ async fn apply_automatic_device_action(
    // Direct automation target/setpoint is translated into zone state and may use the next
    // schedule boundary. Serialize that derivation with schedule edits before locking the zone.
    let _schedule_guard = state.lock_schedule_operation().await;
+    // Device automations can alter durable thermostat state. Serialize that transition with
+    // the thermostat cycle so it cannot act on a snapshot taken before this automation.
+    let _cycle_guard = state.lock_zone_control_cycle().await;
    let zones = state.db.list_zones()?;
    let Some(zone_id) = zones.iter().find(|zone| zone.device_id == device_id).map(|zone| zone.id.clone()) else {
        return send_automatic_device_command_if_owned(state, device_id, command).await;
@@ -71,7 +75,7 @@ async fn apply_automatic_device_action(
    let _zone_guard = state.lock_zone_operation(&zone_id).await;
    let _device_guard = state.lock_device_operation(device_id).await;
    let mut zone = state.db.get_zone(&zone_id)?.ok_or_else(|| AppError::NotFound(format!("zone {zone_id}")))?;
-    if zone.device_manual_override || zone.local_thermostat_power.is_some() {
+    if zone.device_manual_override || zone.local_thermostat_power.is_some() || temporary_quick_thermostat_is_active(&zone, Utc::now()) {
        return Ok(None);
    }
    // A power-on automation is an explicit domain transition and may re-enable a zone that
@@ -674,6 +674,9 @@ async fn control_zones(state: &AppState) -> Result<()> {
                        "quiet": updated_device.quiet,
                        "sleep": updated_device.sleep,
                        "night_mode": night_active,
+                        "schedule_id": active_schedule.map(|item| item.id.as_str()),
+                        "flow_id": active_schedule.and_then(|item| item.flow_id.as_deref()),
+                        "flow_node_id": active_schedule.and_then(|item| item.flow_node_id.as_deref()),
                    }));
                }
                Ok(None) => {
@@ -107,3 +107,40 @@ mod tests {
        assert_eq!(resolve_entity_id(&settings, None).as_deref(), Some("sensor.salon_temperature"));
    }
 }
+
+/// Read a complete Home Assistant entity document for Flow conditions. Keeping this helper
+/// centralized means state and attribute blocks share the same URL validation, TLS and auth path.
+pub async fn read_entity(
+    default_client: &reqwest::Client,
+    settings: &HomeAssistantSettings,
+    entity_override: Option<&str>,
+) -> Result<Value> {
+    if settings.url.trim().is_empty() { bail!("Home Assistant URL is not configured") }
+    if settings.token.trim().is_empty() { bail!("Home Assistant token is not configured") }
+    let entity = resolve_entity_id(settings, entity_override)
+        .ok_or_else(|| anyhow!("Home Assistant entity_id is not configured"))?;
+    let mut base = Url::parse(settings.url.trim()).context("invalid Home Assistant URL")?;
+    if !matches!(base.scheme(), "http" | "https") { bail!("Home Assistant URL must use http or https") }
+    base = base.join(&format!("api/states/{}", entity.trim_start_matches('/'))).context("cannot build Home Assistant API URL")?;
+    let client = request_client(default_client, settings)?;
+    let response = client.get(base).bearer_auth(settings.token.trim()).header("Accept", "application/json")
+        .send().await.context("Home Assistant request failed")?;
+    if !response.status().is_success() {
+        let status = response.status();
+        let body = response.text().await.unwrap_or_default();
+        bail!("Home Assistant returned {status}: {}", body.chars().take(200).collect::<String>())
+    }
+    response.json().await.context("invalid Home Assistant JSON")
+}
+
+/// Read the raw Home Assistant state for Flow conditions. Unlike `read_temperature`, this
+/// intentionally keeps the state as text so binary_sensor, switch, input_boolean and custom
+/// entities can participate in visual automations.
+pub async fn read_state(
+    default_client: &reqwest::Client,
+    settings: &HomeAssistantSettings,
+    entity_override: Option<&str>,
+) -> Result<String> {
+    let payload = read_entity(default_client, settings, entity_override).await?;
+    payload.get("state").and_then(Value::as_str).map(str::to_string).ok_or_else(|| anyhow!("Home Assistant state is missing"))
+}
@@ -8,6 +8,7 @@ include!("models/defaults.rs");
 include!("models/device.rs");
 include!("models/temporary_thermostat.rs");
 include!("models/zone.rs");
+include!("models/flow.rs");
 include!("models/automation.rs");
 include!("models/history.rs");
 include!("models/integrations.rs");
@@ -17,6 +17,12 @@ pub struct Schedule {
    pub setpoint: f64,
    pub created_at: DateTime<Utc>,
    pub updated_at: DateTime<Utc>,
+    /// Present for records generated by the visual Flow editor. Generated records are read-only
+    /// in the legacy schedule/automation editors; the Flow remains the source of truth.
+    #[serde(default)]
+    pub flow_id: Option<String>,
+    #[serde(default)]
+    pub flow_node_id: Option<String>,
 }

 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -25,7 +31,7 @@ pub struct Automation {
    pub name: String,
    #[serde(default = "default_true")]
    pub enabled: bool,
-    /// temperature_above, temperature_below, time
+    /// temperature_above, temperature_below, time, flow
    pub trigger_kind: String,
    #[serde(default)]
    pub trigger_device_id: Option<String>,
@@ -48,6 +54,18 @@ pub struct Automation {
    pub cooldown_seconds: u64,
    #[serde(default)]
    pub last_fired_at: Option<DateTime<Utc>>,
+    /// Optional Flow-owned thermostat zone target.
+    #[serde(default)]
+    pub action_zone_id: Option<String>,
+    #[serde(default)]
+    pub action_zone_preset: Option<String>,
+    /// Topologically ordered condition/logic program compiled from the visual Flow graph.
+    #[serde(default)]
+    pub flow_conditions: Vec<FlowCondition>,
+    #[serde(default)]
+    pub flow_id: Option<String>,
+    #[serde(default)]
+    pub flow_node_id: Option<String>,
    pub created_at: DateTime<Utc>,
    pub updated_at: DateTime<Utc>,
 }
@@ -9,6 +9,8 @@ pub struct ConfigurationExport {
    pub groups: Vec<ClimateGroup>,
    pub schedules: Vec<Schedule>,
    pub automations: Vec<Automation>,
+    #[serde(default)]
+    pub flows: Vec<Flow>,
 }

 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -0,0 +1,57 @@
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct FlowNode {
+    pub id: String,
+    pub kind: String,
+    #[serde(default)]
+    pub x: f64,
+    #[serde(default)]
+    pub y: f64,
+    #[serde(default)]
+    pub config: Value,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct FlowEdge {
+    pub id: String,
+    pub from: String,
+    pub to: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct FlowCondition {
+    /// Stable block ID used by the compiled Flow program.
+    #[serde(default)]
+    pub id: String,
+    pub kind: String,
+    #[serde(default)]
+    pub config: Value,
+    /// IDs of predecessor blocks. Condition blocks implicitly AND their own predicate with
+    /// predecessor results; logic blocks combine predecessors according to their kind.
+    #[serde(default)]
+    pub inputs: Vec<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Flow {
+    pub id: String,
+    pub name: String,
+    #[serde(default = "default_true")]
+    pub enabled: bool,
+    #[serde(default)]
+    pub description: String,
+    #[serde(default)]
+    pub nodes: Vec<FlowNode>,
+    #[serde(default)]
+    pub edges: Vec<FlowEdge>,
+    #[serde(default)]
+    pub summary: String,
+    #[serde(default)]
+    pub compiled_schedule_ids: Vec<String>,
+    #[serde(default)]
+    pub compiled_automation_ids: Vec<String>,
+    /// Optimistic concurrency token for visual-editor saves. Legacy flows deserialize as 0.
+    #[serde(default)]
+    pub revision: u64,
+    pub created_at: DateTime<Utc>,
+    pub updated_at: DateTime<Utc>,
+}
@@ -68,3 +68,16 @@ pub const LIST_AUTOMATIONS: &str =
 pub const GET_AUTOMATION: &str = "SELECT payload FROM automations WHERE id=?1";
 pub const DELETE_AUTOMATION: &str = "DELETE FROM automations WHERE id=?1";

+
+
+pub const UPSERT_FLOW: &str = r#"
+INSERT INTO flows(id,payload,updated_at) VALUES(?1,?2,?3)
+ON CONFLICT(id) DO UPDATE SET
+    payload=excluded.payload,
+    updated_at=excluded.updated_at
+"#;
+pub const LIST_FLOWS: &str = "SELECT payload FROM flows ORDER BY json_extract(payload, '$.name') COLLATE NOCASE";
+pub const GET_FLOW: &str = "SELECT payload FROM flows WHERE id=?1";
+pub const DELETE_FLOW: &str = "DELETE FROM flows WHERE id=?1";
+pub const DELETE_SCHEDULES_BY_FLOW_ID: &str = "DELETE FROM schedules WHERE json_extract(payload, '$.flow_id')=?1";
+pub const DELETE_AUTOMATIONS_BY_FLOW_ID: &str = "DELETE FROM automations WHERE json_extract(payload, '$.flow_id')=?1";
@@ -37,6 +37,7 @@ DELETE FROM ha_readings WHERE id IN (
 pub const CLEAR_CONFIGURATION: &str = r#"
 DELETE FROM schedules;
 DELETE FROM automations;
+DELETE FROM flows;
 DELETE FROM climate_groups;
 DELETE FROM zones;
 DELETE FROM devices;
@@ -50,6 +50,12 @@ CREATE TABLE IF NOT EXISTS automations (
    updated_at TEXT NOT NULL
 );

+CREATE TABLE IF NOT EXISTS flows (
+    id TEXT PRIMARY KEY,
+    payload TEXT NOT NULL,
+    updated_at TEXT NOT NULL
+);
+
 CREATE TABLE IF NOT EXISTS readings (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    device_id TEXT NOT NULL,
@@ -127,5 +133,7 @@ INSERT OR IGNORE INTO schema_migrations(version, applied_at)
    VALUES (4, strftime('%Y-%m-%dT%H:%M:%fZ','now'));
 INSERT OR IGNORE INTO schema_migrations(version, applied_at)
    VALUES (5, strftime('%Y-%m-%dT%H:%M:%fZ','now'));
+INSERT OR IGNORE INTO schema_migrations(version, applied_at)
+    VALUES (6, strftime('%Y-%m-%dT%H:%M:%fZ','now'));
 "#;

@@ -176,6 +176,20 @@
      <div class="list-grid" id="groupList"></div>
    </section>

+    <section class="view" data-view="flows">
+      <div class="section-heading">
+        <div><span class="eyebrow" data-i18n="flow.eyebrow">Visual logic</span>
+          <h1 data-i18n="nav.flows">Flow</h1>
+        </div><div class="section-actions"><button class="secondary" type="button" data-action="import-flow" data-i18n="flow.import">Import Flow</button><button class="primary" type="button" data-action="new-flow" data-i18n="flow.new">New Flow</button></div>
+      </div>
+      <div class="panel flow-info-panel">
+        <div><strong data-i18n="flow.infoTitle">One place for schedules and automations</strong>
+          <p data-i18n="flow.infoText">Build the logic from blocks. GREE Controller translates Flow into generated schedules and automations. Generated entries are read-only outside this editor.</p></div>
+        <span class="badge" data-i18n="flow.sourceOfTruth">Flow = source of truth</span>
+      </div>
+      <div class="list-grid" id="flowList"></div>
+    </section>
+
    <section class="view" data-view="schedules">
      <div class="section-heading">
        <div><span class="eyebrow" data-i18n="schedules.calendar">Calendar</span>
@@ -694,6 +708,53 @@
    </section>
  </main>

+
+  <section id="flowEditor" class="flow-editor" hidden aria-label="Flow editor">
+    <header class="flow-editor-bar">
+      <div class="flow-editor-title"><button type="button" class="icon-button" data-action="close-flow-editor" aria-label="Back">←</button><div><span class="eyebrow" data-i18n="flow.editorEyebrow">Flow editor</span><input id="flowName" maxlength="100" data-i18n-placeholder="flow.namePlaceholder" placeholder="My automation"></div></div>
+      <div class="flow-editor-actions"><button class="secondary" type="button" data-action="flow-templates" data-i18n="flow.templates">Templates</button><button class="secondary" type="button" data-action="import-flow" data-i18n="flow.import">Import</button><button class="secondary" type="button" data-action="export-flow" data-i18n="flow.export">Export</button><button class="secondary" type="button" data-action="flow-dry-run" data-i18n="flow.dryRun">Dry-run</button><button class="secondary" type="button" data-action="flow-logs" data-i18n="flow.logs">Logs</button><label class="flow-enabled"><input type="checkbox" id="flowEnabled" checked><span data-i18n="common.enabled">Enabled</span></label><span id="flowCompileStatus" class="badge"></span><button class="primary" type="button" data-action="save-flow" data-i18n="actions.save">Save</button></div>
+    </header>
+    <div class="flow-editor-body">
+      <aside class="flow-palette">
+        <div class="flow-palette-head"><strong data-i18n="flow.blocks">Blocks</strong><small data-i18n="flow.paletteHint">Add a block, then connect its output to the next block.</small></div>
+        <div class="flow-palette-group"><span data-i18n="flow.time">Time</span>
+          <button type="button" data-flow-add="weekday" data-i18n="flow.node.weekday">Dni tygodnia</button><button type="button" data-flow-add="time_range" data-i18n="flow.node.timeRange">Przedział godzin</button><button type="button" data-flow-add="date_range" data-i18n="flow.node.dateRange">Zakres dat</button><button type="button" data-flow-add="night_mode" data-i18n="flow.node.nightMode">Tryb nocny</button></div>
+        <div class="flow-palette-group"><span data-i18n="flow.sensors">Sensors</span>
+          <button type="button" data-flow-add="outdoor_temperature" data-i18n="flow.node.outdoorTemperature">Temperatura zewn.</button><button type="button" data-flow-add="device_temperature" data-i18n="flow.node.deviceTemperature">Temperatura urządzenia</button><button type="button" data-flow-add="zone_temperature" data-i18n="flow.node.zoneTemperature">Temperatura strefy</button><button type="button" data-flow-add="house_mode" data-i18n="flow.node.houseMode">Tryb domu</button><button type="button" data-flow-add="device_state" data-i18n="flow.node.deviceState">Stan urządzenia</button><button type="button" data-flow-add="zone_state" data-i18n="flow.node.zoneState">Stan termostatu</button><button type="button" data-flow-add="group_state" data-i18n="flow.node.groupState">Stan grupy</button><button type="button" data-flow-add="ha_state" data-i18n="flow.node.haState">HA: stan</button><button type="button" data-flow-add="ha_numeric" data-i18n="flow.node.haNumeric">HA: wartość</button><button type="button" data-flow-add="ha_attribute" data-i18n="flow.node.haAttribute">HA: atrybut</button><button type="button" data-flow-add="ha_available" data-i18n="flow.node.haAvailable">HA: dostępność</button><button type="button" data-flow-add="constant" data-i18n="flow.node.constant">Stała testowa</button></div>
+        <div class="flow-palette-group"><span data-i18n="flow.logic">Logic</span><button type="button" data-flow-add="logic_and" data-i18n="flow.node.and">AND</button><button type="button" data-flow-add="logic_or" data-i18n="flow.node.or">OR</button><button type="button" data-flow-add="logic_not" data-i18n="flow.node.not">NOT</button></div>
+        <div class="flow-palette-group"><span data-i18n="flow.actions">Actions</span>
+          <button type="button" data-flow-add="zone_thermostat" data-i18n="flow.node.thermostat">Termostat</button><button type="button" data-flow-add="device_action" data-i18n="flow.node.greeDevice">Urządzenie GREE</button><button type="button" data-flow-add="group_action" data-i18n="flow.node.group">Grupa</button></div>
+      </aside>
+      <div class="flow-workspace-wrap">
+        <div id="flowWorkspace" class="flow-workspace" tabindex="0">
+          <svg id="flowEdges" class="flow-edges" aria-hidden="true"></svg><div id="flowNodes" class="flow-nodes"></div>
+          <div id="flowEmptyHint" class="flow-empty-hint"><strong data-i18n="flow.emptyCanvas">Start by adding blocks</strong><span data-i18n="flow.emptyCanvasHint">Conditions go on the left, actions on the right.</span></div>
+        </div>
+        <div class="flow-natural-preview"><strong data-i18n="flow.interpretation">Interpretation</strong><span id="flowInterpretation"></span></div>
+      </div>
+      <aside id="flowInspector" class="flow-inspector"><div class="empty compact"><strong data-i18n="flow.selectBlock">Select a block</strong><span data-i18n="flow.selectBlockHint">Its settings will appear here.</span></div></aside>
+    </div>
+  </section>
+
+  <input id="flowImportFile" type="file" accept="application/json,.json,.flow.json" hidden>
+
+  <dialog id="flowTemplateDialog" class="flow-tool-dialog">
+    <div class="dialog-head"><div><span class="eyebrow" data-i18n="flow.templateLibrary">Flow library</span><h2 data-i18n="flow.templates">Templates</h2></div><button type="button" data-close>×</button></div>
+    <p class="field-note" data-i18n="flow.templatesHint">Ready-made layouts create an editable graph using existing zones, devices and groups.</p>
+    <div id="flowTemplateList" class="flow-template-list"></div>
+  </dialog>
+
+  <dialog id="flowTestDialog" class="flow-tool-dialog">
+    <div class="dialog-head"><div><span class="eyebrow" data-i18n="flow.testMode">Flow diagnostics</span><h2 id="flowTestTitle" data-i18n="flow.dryRun">Dry-run</h2></div><button type="button" data-close>×</button></div>
+    <div id="flowSimulationControls" class="flow-simulation-controls">
+      <p class="field-note" data-i18n="flow.dryRunHint">Dry-run does not change thermostat, device, group, schedule or automation state.</p>
+      <label><span data-i18n="flow.simulationTime">Simulation date and time</span><input id="flowSimulationAt" type="datetime-local"></label>
+      <div><strong data-i18n="flow.simulationOverrides">Sensor overrides</strong><p class="field-note" data-i18n="flow.simulationOverridesHint">Leave blank to use the current application or Home Assistant state.</p><div id="flowSimulationOverrides" class="flow-simulation-overrides"></div></div>
+      <div class="dialog-actions"><button class="primary" type="button" data-action="run-flow-dry-run" data-i18n="flow.runSimulation">Run simulation</button></div>
+    </div>
+    <div id="flowTestResults" class="flow-test-results"></div>
+  </dialog>
+
  <nav class="bottom-nav" data-i18n-aria="nav.navigation" aria-label="Navigation">
    <button class="active" data-nav="dashboard"><span>⌂</span><b data-i18n="nav.dashboard">Dashboard</b></button>
    <button data-nav="devices"><span>▣</span><b data-i18n="nav.devices">Devices</b></button>
@@ -708,6 +769,7 @@
    </div>
    <div class="menu-list">
      <button data-go="groups"><span data-i18n="nav.groups">Groups</span><span>›</span></button>
+      <button data-go="flows"><span data-i18n="nav.flows">Flow</span><span>›</span></button>
      <button data-go="schedules"><span data-i18n="nav.schedules">Schedules</span><span>›</span></button>
      <button data-go="automations"><span data-i18n="nav.automations">Automations</span><span>›</span></button>
      <button data-go="simulation"><span data-i18n="nav.simulation">Simulator</span><span>›</span></button>
@@ -8,6 +8,7 @@ async function loadBootstrap(showMessage = false) {
    app.groups = data.groups || [];
    app.schedules = data.schedules || [];
    app.automations = data.automations || [];
+    app.flows = data.flows || [];
    app.accessTokens = data.access_tokens || [];
    app.settings = data.settings || null;
    app.sensorAliases = { ...(app.settings?.home_assistant?.sensor_aliases || {}) };
@@ -25,7 +25,7 @@ const preferredLanguage = getCookie('gree_controller_language') || DEFAULT_LANGU
 const preferredTheme = ['system', 'light', 'dark'].includes(getCookie('gree_controller_theme')) ? getCookie('gree_controller_theme') : 'system';

 const app = {
-  devices: [], zones: [], groups: [], schedules: [], automations: [], accessTokens: [], settings: null, system: {}, outdoorTemperature: null,
+  devices: [], zones: [], groups: [], schedules: [], automations: [], flows: [], accessTokens: [], settings: null, system: {}, outdoorTemperature: null,
  token: localStorage.getItem('gree_controller_token') || '', ws: null, wsTimer: null,
  currentView: 'dashboard', loading: false, language: preferredLanguage, theme: preferredTheme, connectionStatus: 'connecting',
  languages: [], translations: {}, locales: {},
@@ -34,6 +34,7 @@ const app = {
  customChartSeries: [], savedCharts: [], chartZooms: {}, chartHiddenSeries: {}, zoneControlSeq: {}, groupControlSeq: {}, zoneControlQueue: {}, groupControlQueue: {}, deviceControlQueue: {}, houseControlQueue: null, climateControlQueue: null, groupCustomDrafts: {}, zoneTemperatureTimers: {},
  controlPlan: null, controlPlanTimer: null, debugLines: [], debugBacklogLoaded: false, debugFilter: 'all', sensorAliases: {},
  simulationScope: 'units', simulationTarget: 'all', standaloneSimulation: false, dashboardTab: 'main', settingsTab: 'app', systemSnapshotAt: Date.now(),
+  flowDraft: null, flowSelectedNodeId: null, flowConnectFrom: null, flowDirty: false,
 };
 try { app.savedCharts = JSON.parse(localStorage.getItem('gree_controller_saved_charts') || '[]'); } catch (_) { app.savedCharts = []; }

@@ -8,6 +8,7 @@ function renderAll() {
  renderZones();
  renderSchedules();
  renderAutomations();
+  renderFlows();
  renderAccessTokens();
  fillSelects();
  renderSettings();
@@ -65,6 +66,7 @@ function planEventMarkup(event) {

 function automationTriggerLabel(item) {
  if (item.trigger_kind === 'time') return tr('automations.triggerAt', { time: item.at_time || '—' });
+  if (item.trigger_kind === 'flow') return tr('flow.generated');
  const key = item.trigger_kind === 'temperature_above' ? 'automations.triggerAbove' : 'automations.triggerBelow';
  return tr(key, { temperature: fmtTemp(item.threshold) });
 }
@@ -455,20 +455,21 @@ function renderSchedules() {
    const days = item.weekdays.map(day => dayNames[day - 1]).join(', ');
    return `<article class="list-card"><div class="list-card-head"><div><h3>${esc(item.name)}</h3><p>${esc(zone?.name || tr('common.noZone'))} · ${esc(days)}</p></div><span class="badge ${item.enabled ? 'active' : ''}">${esc(item.enabled ? tr('common.enabled') : tr('common.disabled'))}</span></div>
      <div class="card-stats"><div class="card-stat"><small>${esc(tr('common.from'))}</small><strong>${esc(item.start_time)}</strong></div><div class="card-stat"><small>${esc(tr('common.to'))}</small><strong>${esc(item.end_time)}</strong></div><div class="card-stat"><small>${esc(tr('schedules.profile'))}</small><strong>${esc(item.preset === 'custom' ? fmtTemp(item.setpoint) : zonePresetLabel(item.preset))}</strong></div></div>
-      <div class="card-footer"><small>${esc(tr('schedules.crossMidnight'))}</small><div class="card-menu"><button data-action="edit-schedule" data-id="${esc(item.id)}">${esc(tr('actions.edit'))}</button><button class="danger" data-action="delete-schedule" data-id="${esc(item.id)}">${esc(tr('actions.delete'))}</button></div></div></article>`;
+      <div class="card-footer"><small>${esc(item.flow_id ? tr('flow.generatedReadOnly') : tr('schedules.crossMidnight'))}</small><div class="card-menu">${item.flow_id ? `<button data-action="edit-flow" data-id="${esc(item.flow_id)}">${esc(tr('flow.openEditor'))}</button>` : `<button data-action="edit-schedule" data-id="${esc(item.id)}">${esc(tr('actions.edit'))}</button><button class="danger" data-action="delete-schedule" data-id="${esc(item.id)}">${esc(tr('actions.delete'))}</button>`}</div></div></article>`;
  }).join('') : `<div class="empty"><strong>${esc(tr('schedules.emptyTitle'))}</strong>${esc(tr('schedules.emptyText'))}</div>`;
 }

 function renderAutomations() {
  $('#automationList').innerHTML = app.automations.length ? app.automations.map(item => {
+    const actionZone = item.action_zone_id ? app.zones.find(zone => zone.id === item.action_zone_id) : null;
    const actionGroup = item.action_group_id ? app.groups.find(group => group.id === item.action_group_id) : null;
    const actionDevice = app.devices.find(device => device.id === item.action_device_id);
-    const targetName = actionGroup?.name || actionDevice?.name || tr('common.noDevice');
-    const mode = item.action.mode === 'auto' && actionGroup ? tr('groups.followHouse') : (item.action.mode ? modeLabel(item.action.mode) : '—');
-    const preset = item.action_preset ? zonePresetLabel(item.action_preset) : '—';
+    const targetName = actionZone?.name || actionGroup?.name || actionDevice?.name || tr('common.noDevice');
+    const mode = item.action.mode === 'auto' && (actionGroup || actionZone) ? tr('groups.followHouse') : (item.action.mode ? modeLabel(item.action.mode) : '—');
+    const preset = item.action_zone_preset ? zonePresetLabel(item.action_zone_preset) : (item.action_preset ? zonePresetLabel(item.action_preset) : '—');
    return `<article class="list-card"><div class="list-card-head"><div><h3>${esc(item.name)}</h3><p>${esc(tr('automations.triggerSummary', { trigger: automationTriggerLabel(item), device: targetName }))}</p></div><span class="badge ${item.enabled ? 'active' : ''}">${esc(item.enabled ? tr('common.active') : tr('common.disabled'))}</span></div>
      <div class="card-stats"><div class="card-stat"><small>${esc(tr('common.power'))}</small><strong>${item.action.power == null ? '—' : item.action.power ? tr('common.on') : tr('common.off')}</strong></div><div class="card-stat"><small>${esc(tr('common.mode'))}</small><strong>${esc(mode)}</strong></div><div class="card-stat"><small>${esc(tr('groups.profile'))}</small><strong>${esc(preset)}</strong></div><div class="card-stat"><small>${esc(tr('automations.last'))}</small><strong>${item.last_fired_at ? new Date(item.last_fired_at).toLocaleTimeString(locale(), { hour: '2-digit', minute: '2-digit' }) : '—'}</strong></div></div>
-      <div class="card-footer"><small>${esc(actionGroup ? `${tr('groups.group')}: ${targetName}` : `${tr('common.device')}: ${targetName}`)} · ${esc(tr('common.cooldown'))} ${item.cooldown_seconds}s</small><div class="card-menu"><button data-action="edit-automation" data-id="${esc(item.id)}">${esc(tr('actions.edit'))}</button><button class="danger" data-action="delete-automation" data-id="${esc(item.id)}">${esc(tr('actions.delete'))}</button></div></div></article>`;
+      <div class="card-footer"><small>${esc(item.flow_id ? tr('flow.generatedReadOnly') : (actionGroup ? `${tr('groups.group')}: ${targetName}` : `${tr('common.device')}: ${targetName}`))} · ${esc(tr('common.cooldown'))} ${item.cooldown_seconds}s</small><div class="card-menu">${item.flow_id ? `<button data-action="edit-flow" data-id="${esc(item.flow_id)}">${esc(tr('flow.openEditor'))}</button>` : `<button data-action="edit-automation" data-id="${esc(item.id)}">${esc(tr('actions.edit'))}</button><button class="danger" data-action="delete-automation" data-id="${esc(item.id)}">${esc(tr('actions.delete'))}</button>`}</div></div></article>`;
  }).join('') : `<div class="empty"><strong>${esc(tr('automations.emptyTitle'))}</strong>${esc(tr('automations.emptyText'))}</div>`;
 }

@@ -0,0 +1,470 @@
+const FLOW_NODE_META = Object.freeze({
+  weekday: { titleKey: 'flow.node.weekday', category: 'time' },
+  time_range: { titleKey: 'flow.node.timeRange', category: 'time' },
+  date_range: { titleKey: 'flow.node.dateRange', category: 'time' },
+  outdoor_temperature: { titleKey: 'flow.node.outdoorTemperature', category: 'sensor' },
+  device_temperature: { titleKey: 'flow.node.deviceTemperature', category: 'sensor' },
+  zone_temperature: { titleKey: 'flow.node.zoneTemperature', category: 'sensor' },
+  ha_state: { titleKey: 'flow.node.haState', category: 'sensor' },
+  ha_numeric: { titleKey: 'flow.node.haNumeric', category: 'sensor' },
+  ha_attribute: { titleKey: 'flow.node.haAttribute', category: 'sensor' },
+  ha_available: { titleKey: 'flow.node.haAvailable', category: 'sensor' },
+  house_mode: { titleKey: 'flow.node.houseMode', category: 'sensor' },
+  device_state: { titleKey: 'flow.node.deviceState', category: 'sensor' },
+  zone_state: { titleKey: 'flow.node.zoneState', category: 'sensor' },
+  group_state: { titleKey: 'flow.node.groupState', category: 'sensor' },
+  night_mode: { titleKey: 'flow.node.nightMode', category: 'time' },
+  constant: { titleKey: 'flow.node.constant', category: 'sensor' },
+  logic_and: { titleKey: 'flow.node.and', category: 'logic' },
+  logic_or: { titleKey: 'flow.node.or', category: 'logic' },
+  logic_not: { titleKey: 'flow.node.not', category: 'logic' },
+  zone_thermostat: { titleKey: 'flow.node.thermostat', category: 'action' },
+  device_action: { titleKey: 'flow.node.greeDevice', category: 'action' },
+  group_action: { titleKey: 'flow.node.group', category: 'action' },
+});
+
+function newFlowId(prefix = 'node') {
+  if (crypto?.randomUUID) return `${prefix}-${crypto.randomUUID()}`;
+  return `${prefix}-${Date.now()}-${Math.random().toString(16).slice(2)}`;
+}
+
+function flowDefaultConfig(kind) {
+  if (kind === 'weekday') return { days: [1, 2, 3, 4, 5] };
+  if (kind === 'time_range') return { start: '06:00', end: '08:00' };
+  if (kind === 'date_range') { const today = new Date().toISOString().slice(0, 10); return { start: today, end: today }; }
+  if (kind === 'outdoor_temperature') return { operator: 'lt', value: 5 };
+  if (kind === 'device_temperature') return { device_id: app.devices[0]?.id || '', operator: 'lt', value: 20 };
+  if (kind === 'zone_temperature') return { zone_id: app.zones[0]?.id || '', operator: 'lt', value: 20 };
+  if (kind === 'ha_state') return { entity_id: '', operator: 'eq', value: 'on' };
+  if (kind === 'ha_numeric') return { entity_id: '', operator: 'lt', value: 20 };
+  if (kind === 'ha_attribute') return { entity_id: '', attribute: '', operator: 'eq', value: '' };
+  if (kind === 'ha_available') return { entity_id: '' };
+  if (kind === 'house_mode') return { operator: 'eq', value: 'cool' };
+  if (kind === 'device_state') return { device_id: app.devices[0]?.id || '', field: 'online', operator: 'eq', value: 'true' };
+  if (kind === 'zone_state') return { zone_id: app.zones[0]?.id || '', field: 'demand', operator: 'eq', value: 'true' };
+  if (kind === 'group_state') return { group_id: app.groups[0]?.id || '', field: 'power_enabled', operator: 'eq', value: 'true' };
+  if (kind === 'night_mode') return {};
+  if (kind === 'constant') return { value: true };
+  if (kind === 'zone_thermostat') return { zone_id: app.zones[0]?.id || '', preset: 'comfort', setpoint: 21, mode: 'auto', cooldown_seconds: 60 };
+  if (kind === 'device_action') return { device_id: app.devices[0]?.id || '', power: true, mode: '', target_temperature: null, fan_speed: null, swing_vertical: null, swing_horizontal: null, quiet: null, turbo: null, light: null, air: null, xfan: null, health: null, sleep: null, cooldown_seconds: 60 };
+  if (kind === 'group_action') return { group_id: app.groups[0]?.id || '', power: true, mode: '', preset: '', setpoint: 21, cooldown_seconds: 60 };
+  return {};
+}
+
+function renderFlows() {
+  const host = $('#flowList'); if (!host) return;
+  host.innerHTML = app.flows.length ? app.flows.map(flow => `<article class="list-card flow-card">
+    <div class="list-card-head"><div><h3>${esc(flow.name)}</h3><p>${esc(flow.description || tr('flow.defaultDescription'))}</p></div><span class="badge ${flow.enabled ? 'active' : ''}">${esc(flow.enabled ? tr('common.enabled') : tr('common.disabled'))}</span></div>
+    <div class="card-stats"><div class="card-stat"><small>${esc(tr('flow.blocks'))}</small><strong>${flow.nodes?.length || 0}</strong></div><div class="card-stat"><small>${esc(tr('nav.schedules'))}</small><strong>${flow.compiled_schedule_ids?.length || 0}</strong></div><div class="card-stat"><small>${esc(tr('nav.automations'))}</small><strong>${flow.compiled_automation_ids?.length || 0}</strong></div></div>
+    <div class="card-footer"><small>${esc(tr('flow.compileCount', { schedules: flow.compiled_schedule_ids?.length || 0, automations: flow.compiled_automation_ids?.length || 0 }))}</small><div class="card-menu"><button data-action="edit-flow" data-id="${esc(flow.id)}">${esc(tr('flow.openEditor'))}</button><button class="danger" data-action="delete-flow" data-id="${esc(flow.id)}">${esc(tr('actions.delete'))}</button></div></div>
+  </article>`).join('') : `<div class="empty"><strong>${esc(tr('flow.emptyTitle'))}</strong>${esc(tr('flow.emptyText'))}</div>`;
+}
+
+function flowDraftFrom(flow) {
+  return flow ? JSON.parse(JSON.stringify(flow)) : {
+    id: '', revision: 0, name: tr('flow.newDefaultName'), enabled: true, description: '', nodes: [], edges: [], summary: '', compiled_schedule_ids: [], compiled_automation_ids: [],
+  };
+}
+
+function openFlowEditor(id = '', { push = true } = {}) {
+  const flow = id ? app.flows.find(item => item.id === id) : null;
+  if (id && !flow) return toast(tr('flow.notFound'), true);
+  app.flowDraft = flowDraftFrom(flow);
+  app.flowSelectedNodeId = null; app.flowConnectFrom = null; app.flowDirty = false;
+  $('#flowName').value = app.flowDraft.name || '';
+  $('#flowEnabled').checked = app.flowDraft.enabled !== false;
+  $('#flowEditor').hidden = false;
+  document.body.classList.add('flow-editor-open');
+  renderFlowEditor();
+  if (push) updateBrowserUrl(`/flows/${flow?.id || 'new'}`);
+}
+
+function closeFlowEditor({ push = true, force = false } = {}) {
+  if (!force && app.flowDirty && !confirm(tr('confirm.discardChanges'))) return false;
+  $('#flowEditor').hidden = true; document.body.classList.remove('flow-editor-open');
+  app.flowDraft = null; app.flowSelectedNodeId = null; app.flowConnectFrom = null; app.flowDirty = false;
+  if (push) updateBrowserUrl('/flows');
+  return true;
+}
+
+function flowNodeSummary(node) {
+  const c = node.config || {};
+  if (node.kind === 'weekday') return (c.days || []).map(day => tr(`day.${day}`)).join(', ') || '—';
+  if (node.kind === 'time_range') return `${c.start || '—'}–${c.end || '—'}`;
+  if (node.kind === 'date_range') return `${c.start || '—'} → ${c.end || '—'}`;
+  if (node.kind === 'outdoor_temperature') return `${flowOperatorLabel(c.operator)} ${fmtTemp(c.value)}`;
+  if (node.kind === 'device_temperature') return `${app.devices.find(d => d.id === c.device_id)?.name || tr('common.noDevice')} · ${flowOperatorLabel(c.operator)} ${fmtTemp(c.value)}`;
+  if (node.kind === 'zone_temperature') return `${app.zones.find(z => z.id === c.zone_id)?.name || tr('common.noZone')} · ${flowOperatorLabel(c.operator)} ${fmtTemp(c.value)}`;
+  if (node.kind === 'ha_state') return `${c.entity_id || 'entity_id'} ${c.operator === 'neq' ? '≠' : '='} ${c.value || '—'}`;
+  if (node.kind === 'ha_numeric') return `${c.entity_id || 'entity_id'} · ${flowOperatorLabel(c.operator)} ${c.value ?? '—'}`;
+  if (node.kind === 'ha_attribute') return `${c.entity_id || 'entity_id'}.${c.attribute || 'attribute'} ${flowOperatorLabel(c.operator)} ${c.value ?? '—'}`;
+  if (node.kind === 'ha_available') return `${c.entity_id || 'entity_id'} · ${tr('flow.available')}`;
+  if (node.kind === 'house_mode') return `${tr('flow.houseMode')} ${flowOperatorLabel(c.operator)} ${c.value || '—'}`;
+  if (node.kind === 'device_state') return `${app.devices.find(d => d.id === c.device_id)?.name || tr('common.noDevice')} · ${c.field || 'state'} ${flowOperatorLabel(c.operator)} ${c.value ?? '—'}`;
+  if (node.kind === 'zone_state') return `${app.zones.find(z => z.id === c.zone_id)?.name || tr('common.noZone')} · ${c.field || 'state'} ${flowOperatorLabel(c.operator)} ${c.value ?? '—'}`;
+  if (node.kind === 'group_state') return `${app.groups.find(g => g.id === c.group_id)?.name || tr('groups.group')} · ${c.field || 'power_enabled'} ${flowOperatorLabel(c.operator)} ${c.value ?? '—'}`;
+  if (node.kind === 'night_mode') return tr('flow.nightModeActive');
+  if (node.kind === 'constant') return c.value === false ? tr('common.no') : tr('common.yes');
+  if (node.kind === 'logic_and') return tr('flow.allConditions');
+  if (node.kind === 'logic_or') return tr('flow.anyCondition');
+  if (node.kind === 'logic_not') return tr('flow.invertCondition');
+  if (node.kind === 'zone_thermostat') { const zone = app.zones.find(z => z.id === c.zone_id); return `${zone?.name || tr('common.noZone')} · ${c.preset === 'custom' ? fmtTemp(c.setpoint) : zonePresetLabel(c.preset || 'comfort')}`; }
+  if (node.kind === 'device_action') { const d = app.devices.find(v => v.id === c.device_id); return `${d?.name || tr('common.noDevice')} · ${c.power == null ? tr('actions.noChange') : c.power ? tr('common.on') : tr('common.off')}`; }
+  if (node.kind === 'group_action') { const g = app.groups.find(v => v.id === c.group_id); return `${g?.name || tr('groups.group')} · ${c.power == null ? tr('actions.noChange') : c.power ? tr('common.on') : tr('common.off')}`; }
+  return '';
+}
+
+function flowNodeTitle(meta) { return meta?.titleKey ? tr(meta.titleKey) : (meta?.title || ''); }
+function flowOperatorLabel(op) { return ({ lt: '<', lte: '≤', gt: '>', gte: '≥', eq: '=', neq: '≠' })[op] || '<'; }
+function flowNodeById(id) { return app.flowDraft?.nodes?.find(node => node.id === id); }
+
+function renderFlowEditor() {
+  const draft = app.flowDraft; if (!draft) return;
+  const nodesHost = $('#flowNodes');
+  nodesHost.innerHTML = draft.nodes.map(node => {
+    const meta = FLOW_NODE_META[node.kind] || { title: node.kind, category: 'logic' };
+    return `<article class="flow-node flow-node-${esc(meta.category)} ${app.flowSelectedNodeId === node.id ? 'selected' : ''}" data-flow-node="${esc(node.id)}" style="left:${Number(node.x || 0)}px;top:${Number(node.y || 0)}px">
+      <button class="flow-port flow-port-in" type="button" data-flow-input="${esc(node.id)}" title="${esc(tr('flow.connectHere'))}"></button>
+      <div class="flow-node-head"><span>${esc(flowNodeTitle(meta))}</span><button type="button" data-flow-remove="${esc(node.id)}" aria-label="${esc(tr('actions.delete'))}">×</button></div>
+      <div class="flow-node-body">${esc(flowNodeSummary(node))}</div>
+      <button class="flow-port flow-port-out ${app.flowConnectFrom === node.id ? 'armed' : ''}" type="button" data-flow-output="${esc(node.id)}" title="${esc(tr('flow.startConnection'))}"></button>
+    </article>`;
+  }).join('');
+  $('#flowEmptyHint').hidden = draft.nodes.length > 0;
+  renderFlowEdges(); renderFlowInspector(); renderFlowInterpretation();
+  const status = $('#flowCompileStatus');
+  status.textContent = tr('flow.compileCount', { schedules: draft.compiled_schedule_ids?.length || 0, automations: draft.compiled_automation_ids?.length || 0 });
+}
+
+function renderFlowEdges() {
+  const svg = $('#flowEdges'), workspace = $('#flowWorkspace'); if (!svg || !workspace || !app.flowDraft) return;
+  const rect = workspace.getBoundingClientRect();
+  svg.setAttribute('viewBox', `0 0 ${Math.max(workspace.clientWidth, workspace.scrollWidth)} ${Math.max(workspace.clientHeight, workspace.scrollHeight)}`);
+  svg.innerHTML = app.flowDraft.edges.map(edge => {
+    const from = $(`[data-flow-node="${CSS.escape(edge.from)}"]`), to = $(`[data-flow-node="${CSS.escape(edge.to)}"]`); if (!from || !to) return '';
+    const a = from.getBoundingClientRect(), b = to.getBoundingClientRect();
+    const x1 = a.right - rect.left + workspace.scrollLeft - 2, y1 = a.top - rect.top + workspace.scrollTop + a.height / 2;
+    const x2 = b.left - rect.left + workspace.scrollLeft + 2, y2 = b.top - rect.top + workspace.scrollTop + b.height / 2;
+    const bend = Math.max(55, Math.abs(x2 - x1) * .45);
+    return `<path data-flow-edge="${esc(edge.id)}" d="M ${x1} ${y1} C ${x1 + bend} ${y1}, ${x2 - bend} ${y2}, ${x2} ${y2}"/>`;
+  }).join('');
+}
+
+function flowSelectOptions(items, selected, nameFn = item => item.name) {
+  return items.map(item => `<option value="${esc(item.id)}" ${item.id === selected ? 'selected' : ''}>${esc(nameFn(item))}</option>`).join('');
+}
+function flowOperatorOptions(selected) { return [['lt','<'],['lte','≤'],['gt','>'],['gte','≥'],['eq','='],['neq','≠']].map(([v,l]) => `<option value="${v}" ${v === selected ? 'selected' : ''}>${l}</option>`).join(''); }
+
+function renderFlowInspector() {
+  const host = $('#flowInspector'), node = flowNodeById(app.flowSelectedNodeId); if (!host) return;
+  if (!node) { host.innerHTML = `<div class="empty compact"><strong>${esc(tr('flow.selectBlock'))}</strong><span>${esc(tr('flow.selectBlockHint'))}</span></div>`; return; }
+  const c = node.config || {}, meta = FLOW_NODE_META[node.kind] || { title: node.kind };
+  let fields = '';
+  if (node.kind === 'weekday') fields = `<div class="flow-day-grid">${[1,2,3,4,5,6,7].map(day => `<label><input type="checkbox" data-flow-config="days" value="${day}" ${(c.days || []).includes(day) ? 'checked' : ''}><span>${esc(tr(`day.${day}`))}</span></label>`).join('')}</div>`;
+  else if (node.kind === 'time_range') fields = `<div class="two"><label><span>${esc(tr('common.from'))}</span><input type="time" data-flow-config="start" value="${esc(c.start || '06:00')}"></label><label><span>${esc(tr('common.to'))}</span><input type="time" data-flow-config="end" value="${esc(c.end || '08:00')}"></label></div>`;
+  else if (node.kind === 'date_range') fields = `<div class="two"><label><span>${esc(tr('common.from'))}</span><input type="date" data-flow-config="start" value="${esc(c.start || '')}"></label><label><span>${esc(tr('common.to'))}</span><input type="date" data-flow-config="end" value="${esc(c.end || '')}"></label></div>`;
+  else if (node.kind === 'outdoor_temperature') fields = flowComparisonFields(c);
+  else if (node.kind === 'device_temperature') fields = `<label><span>${esc(tr('common.device'))}</span><select data-flow-config="device_id">${flowSelectOptions(app.devices, c.device_id)}</select></label>${flowComparisonFields(c)}`;
+  else if (node.kind === 'zone_temperature') fields = `<label><span>${esc(tr('common.zone'))}</span><select data-flow-config="zone_id">${flowSelectOptions(app.zones, c.zone_id)}</select></label>${flowComparisonFields(c)}`;
+  else if (node.kind === 'ha_state') fields = `<label><span>entity_id</span><input data-flow-config="entity_id" value="${esc(c.entity_id || '')}" placeholder="binary_sensor.window"></label><div class="two"><label><span>${esc(tr('flow.operator'))}</span><select data-flow-config="operator"><option value="eq" ${c.operator !== 'neq' ? 'selected' : ''}>=</option><option value="neq" ${c.operator === 'neq' ? 'selected' : ''}>≠</option></select></label><label><span>${esc(tr('flow.state'))}</span><input data-flow-config="value" value="${esc(c.value || '')}" placeholder="on"></label></div>`;
+  else if (node.kind === 'ha_numeric') fields = `<label><span>entity_id</span><input data-flow-config="entity_id" value="${esc(c.entity_id || '')}" placeholder="sensor.outdoor_temperature"></label>${flowComparisonFields(c, false)}`;
+  else if (node.kind === 'ha_attribute') fields = `<label><span>entity_id</span><input data-flow-config="entity_id" value="${esc(c.entity_id || '')}" placeholder="climate.living_room"></label><label><span>${esc(tr('flow.attribute'))}</span><input data-flow-config="attribute" value="${esc(c.attribute || '')}" placeholder="hvac_action"></label>${flowTextComparisonFields(c, true)}`;
+  else if (node.kind === 'ha_available') fields = `<label><span>entity_id</span><input data-flow-config="entity_id" value="${esc(c.entity_id || '')}" placeholder="binary_sensor.window"></label><p class="field-note">${esc(tr('flow.haAvailableHint'))}</p>`;
+  else if (node.kind === 'house_mode') fields = `<div class="two"><label><span>${esc(tr('flow.operator'))}</span><select data-flow-config="operator"><option value="eq" ${c.operator !== 'neq' ? 'selected' : ''}>=</option><option value="neq" ${c.operator === 'neq' ? 'selected' : ''}>≠</option></select></label><label><span>${esc(tr('flow.houseMode'))}</span><select data-flow-config="value">${['cool','heat','off'].map(v => `<option value="${v}" ${c.value === v ? 'selected' : ''}>${esc(v === 'off' ? tr('common.off') : tr(`mode.${v}`))}</option>`).join('')}</select></label></div>`;
+  else if (node.kind === 'device_state') fields = `<label><span>${esc(tr('common.device'))}</span><select data-flow-config="device_id">${flowSelectOptions(app.devices, c.device_id)}</select></label><label><span>${esc(tr('flow.field'))}</span><select data-flow-config="field">${['enabled','online','power','mode','fan_speed','swing_vertical','swing_horizontal','quiet','turbo','light','air','xfan','health','sleep'].map(v => `<option value="${v}" ${c.field === v ? 'selected' : ''}>${esc(v)}</option>`).join('')}</select></label>${flowTextComparisonFields(c)}`;
+  else if (node.kind === 'zone_state') fields = `<label><span>${esc(tr('common.zone'))}</span><select data-flow-config="zone_id">${flowSelectOptions(app.zones, c.zone_id)}</select></label><label><span>${esc(tr('flow.field'))}</span><select data-flow-config="field">${['enabled','mode','active_preset','demand','control_owner','device_manual_override','local_thermostat_power'].map(v => `<option value="${v}" ${c.field === v ? 'selected' : ''}>${esc(v)}</option>`).join('')}</select></label>${flowTextComparisonFields(c)}`;
+  else if (node.kind === 'group_state') fields = `<label><span>${esc(tr('groups.group'))}</span><select data-flow-config="group_id">${flowSelectOptions(app.groups, c.group_id)}</select></label><label><span>${esc(tr('flow.field'))}</span><select data-flow-config="field"><option value="power_enabled" selected>power_enabled</option></select></label>${flowTextComparisonFields(c)}`;
+  else if (node.kind === 'night_mode') fields = `<p class="field-note">${esc(tr('flow.nightModeHint'))}</p>`;
+  else if (node.kind === 'constant') fields = `<label><span>${esc(tr('flow.value'))}</span><select data-flow-config="value"><option value="true" ${c.value !== false ? 'selected' : ''}>${esc(tr('common.yes'))}</option><option value="false" ${c.value === false ? 'selected' : ''}>${esc(tr('common.no'))}</option></select></label>`;
+  else if (node.kind === 'logic_and') fields = `<p class="field-note">${esc(tr('flow.andHint'))}</p>`;
+  else if (node.kind === 'logic_or') fields = `<p class="field-note">${esc(tr('flow.orHint'))}</p>`;
+  else if (node.kind === 'logic_not') fields = `<p class="field-note">${esc(tr('flow.notHint'))}</p>`;
+  else if (node.kind === 'zone_thermostat') fields = `<label><span>${esc(tr('common.zone'))}</span><select data-flow-config="zone_id">${flowSelectOptions(app.zones, c.zone_id)}</select></label><div class="two"><label><span>${esc(tr('schedules.profile'))}</span><select data-flow-config="preset">${['auto','comfort','sleep','away','custom'].map(v => `<option value="${v}" ${c.preset === v ? 'selected' : ''}>${esc(zonePresetLabel(v))}</option>`).join('')}</select></label><label><span>${esc(tr('common.targetC'))}</span><input type="number" min="8" max="30" step="0.5" data-flow-config="setpoint" value="${Number(c.setpoint ?? 21)}"></label></div><div class="two"><label><span>${esc(tr('common.mode'))}</span><select data-flow-config="mode"><option value="auto" ${c.mode === 'auto' ? 'selected' : ''}>Auto</option><option value="heat" ${c.mode === 'heat' ? 'selected' : ''}>${esc(tr('mode.heat'))}</option><option value="cool" ${c.mode === 'cool' ? 'selected' : ''}>${esc(tr('mode.cool'))}</option></select></label><label><span>${esc(tr('common.power'))}</span><select data-flow-config="power"><option value="" ${c.power == null ? 'selected' : ''}>${esc(tr('actions.noChange'))}</option><option value="true" ${c.power === true ? 'selected' : ''}>${esc(tr('common.on'))}</option><option value="false" ${c.power === false ? 'selected' : ''}>${esc(tr('common.off'))}</option></select></label></div><label><span>${esc(tr('common.cooldownSeconds'))}</span><input type="number" min="30" data-flow-config="cooldown_seconds" value="${Number(c.cooldown_seconds || 60)}"></label>`;
+  else if (node.kind === 'device_action') fields = `<label><span>${esc(tr('common.device'))}</span><select data-flow-config="device_id">${flowSelectOptions(app.devices, c.device_id)}</select></label>${flowActionFields(c, false)}`;
+  else if (node.kind === 'group_action') fields = `<label><span>${esc(tr('groups.group'))}</span><select data-flow-config="group_id">${flowSelectOptions(app.groups, c.group_id)}</select></label>${flowActionFields(c, true)}`;
+  host.innerHTML = `<div class="flow-inspector-head"><div><span class="eyebrow">${esc(tr('flow.blockSettings'))}</span><h3>${esc(flowNodeTitle(meta))}</h3></div><button type="button" class="danger" data-flow-remove="${esc(node.id)}">${esc(tr('actions.delete'))}</button></div>${fields}<div class="flow-inspector-meta"><small>ID</small><code>${esc(node.id)}</code></div>`;
+}
+
+function flowTextComparisonFields(c, numeric = false) { const options = numeric ? flowOperatorOptions(c.operator || 'eq') : [['eq','='],['neq','≠']].map(([v,l]) => `<option value="${v}" ${v === (c.operator || 'eq') ? 'selected' : ''}>${l}</option>`).join(''); return `<div class="two"><label><span>${esc(tr('flow.operator'))}</span><select data-flow-config="operator">${options}</select></label><label><span>${esc(tr('flow.value'))}</span><input data-flow-config="value" value="${esc(c.value ?? '')}"></label></div>`; }
+function flowComparisonFields(c, temperature = true) { return `<div class="two"><label><span>${esc(tr('flow.operator'))}</span><select data-flow-config="operator">${flowOperatorOptions(c.operator || 'lt')}</select></label><label><span>${esc(temperature ? tr('automations.thresholdC') : tr('flow.value'))}</span><input type="number" step="0.1" data-flow-config="value" value="${Number(c.value ?? 0)}"></label></div>`; }
+function flowOptionalBoolField(c, key) {
+  return `<label><span>${esc(key)}</span><select data-flow-config="${esc(key)}"><option value="" ${c[key] == null ? 'selected' : ''}>${esc(tr('actions.noChange'))}</option><option value="true" ${c[key] === true ? 'selected' : ''}>${esc(tr('common.on'))}</option><option value="false" ${c[key] === false ? 'selected' : ''}>${esc(tr('common.off'))}</option></select></label>`;
+}
+function flowActionFields(c, group) {
+  const modes = group ? ['auto','house','heat','cool'] : ['auto','cool','dry','fan','heat'];
+  const modeOptions = modes.map(v => `<option value="${v}" ${c.mode === v ? 'selected' : ''}>${esc(v === 'auto' ? 'Auto' : v === 'house' ? tr('flow.houseMode') : (tr(`mode.${v}`) || v))}</option>`).join('');
+  const base = `<div class="two"><label><span>${esc(tr('common.power'))}</span><select data-flow-config="power"><option value="" ${c.power == null ? 'selected' : ''}>${esc(tr('actions.noChange'))}</option><option value="true" ${c.power === true ? 'selected' : ''}>${esc(tr('common.on'))}</option><option value="false" ${c.power === false ? 'selected' : ''}>${esc(tr('common.off'))}</option></select></label><label><span>${esc(tr('common.mode'))}</span><select data-flow-config="mode"><option value="">${esc(tr('actions.noChange'))}</option>${modeOptions}</select></label></div>`;
+  const target = group
+    ? `<label><span>${esc(tr('groups.profile'))}</span><select data-flow-config="preset"><option value="">${esc(tr('actions.noChange'))}</option>${['auto','comfort','sleep','away','custom'].map(v => `<option value="${v}" ${c.preset === v ? 'selected' : ''}>${esc(zonePresetLabel(v))}</option>`).join('')}</select></label><label><span>${esc(tr('common.targetC'))}</span><input type="number" min="8" max="30" step="0.5" data-flow-config="setpoint" value="${c.setpoint ?? 21}"></label>`
+    : `<label><span>${esc(tr('common.targetC'))}</span><input type="number" min="8" max="30" step="0.5" data-flow-config="target_temperature" value="${c.target_temperature ?? ''}"></label>`;
+  const deviceOptions = group ? '' : `<details class="flow-device-options"><summary>${esc(tr('flow.deviceOptions'))}</summary><div class="two"><label><span>fan_speed</span><select data-flow-config="fan_speed"><option value="" ${c.fan_speed == null ? 'selected' : ''}>${esc(tr('actions.noChange'))}</option>${[0,1,2,3,4,5].map(v => `<option value="${v}" ${Number(c.fan_speed) === v ? 'selected' : ''}>${v}</option>`).join('')}</select></label>${flowOptionalBoolField(c,'swing_vertical')}${flowOptionalBoolField(c,'swing_horizontal')}${flowOptionalBoolField(c,'quiet')}${flowOptionalBoolField(c,'turbo')}${flowOptionalBoolField(c,'light')}${flowOptionalBoolField(c,'air')}${flowOptionalBoolField(c,'xfan')}${flowOptionalBoolField(c,'health')}${flowOptionalBoolField(c,'sleep')}</div><p class="field-note">${esc(tr('flow.deviceOptionsHint'))}</p></details>`;
+  return `${base}${target}${deviceOptions}<label><span>${esc(tr('common.cooldownSeconds'))}</span><input type="number" min="30" data-flow-config="cooldown_seconds" value="${Number(c.cooldown_seconds || 60)}"></label>`;
+}
+
+function flowExpressionSummary(actionId) {
+  if (!app.flowDraft) return '';
+  const byId = new Map(app.flowDraft.nodes.map(node => [node.id, node]));
+  const incoming = id => app.flowDraft.edges.filter(edge => edge.to === id).map(edge => edge.from);
+  const describe = (id, stack = new Set()) => {
+    if (stack.has(id)) return '…';
+    const node = byId.get(id); if (!node) return '';
+    const next = new Set(stack); next.add(id);
+    const parts = incoming(id).map(input => describe(input, next)).filter(Boolean);
+    if (node.kind === 'logic_and') return `(${parts.join(` ${tr('flow.and')} `)})`;
+    if (node.kind === 'logic_or') return `(${parts.join(` ${tr('flow.or')} `)})`;
+    if (node.kind === 'logic_not') return `${tr('flow.not')} (${parts[0] || '—'})`;
+    const own = flowNodeSummary(node);
+    return parts.length ? `(${parts.join(` ${tr('flow.and')} `)}) ${tr('flow.and')} ${own}` : own;
+  };
+  const roots = incoming(actionId).map(id => describe(id)).filter(Boolean);
+  return roots.length ? roots.join(` ${tr('flow.and')} `) : tr('flow.always');
+}
+
+function renderFlowInterpretation() {
+  const target = $('#flowInterpretation'); if (!target || !app.flowDraft) return;
+  const actions = app.flowDraft.nodes.filter(node => FLOW_NODE_META[node.kind]?.category === 'action');
+  if (!actions.length) { target.textContent = tr('flow.noActionsYet'); return; }
+  target.textContent = actions.map(action => `${flowExpressionSummary(action.id)} → ${flowNodeTitle(FLOW_NODE_META[action.kind])}: ${flowNodeSummary(action)}`).join(' · ');
+}
+
+function flowUpstreamNodes(id) {
+  if (!app.flowDraft) return [];
+  const byId = new Map(app.flowDraft.nodes.map(node => [node.id, node])); const seen = new Set(), stack = [id], out = [];
+  while (stack.length) { const current = stack.pop(); app.flowDraft.edges.filter(edge => edge.to === current).forEach(edge => { if (seen.has(edge.from)) return; seen.add(edge.from); const node = byId.get(edge.from); if (node) { out.push(node); stack.push(node.id); } }); }
+  return out;
+}
+
+function addFlowNode(kind) {
+  if (!app.flowDraft || !FLOW_NODE_META[kind]) return;
+  const count = app.flowDraft.nodes.length;
+  const node = { id: newFlowId('node'), kind, x: 80 + (count % 5) * 190, y: 70 + Math.floor(count / 5) * 130, config: flowDefaultConfig(kind) };
+  app.flowDraft.nodes.push(node); app.flowSelectedNodeId = node.id; app.flowDirty = true; renderFlowEditor();
+}
+function removeFlowNode(id) {
+  if (!app.flowDraft) return;
+  app.flowDraft.nodes = app.flowDraft.nodes.filter(node => node.id !== id); app.flowDraft.edges = app.flowDraft.edges.filter(edge => edge.from !== id && edge.to !== id);
+  if (app.flowSelectedNodeId === id) app.flowSelectedNodeId = null; if (app.flowConnectFrom === id) app.flowConnectFrom = null; app.flowDirty = true; renderFlowEditor();
+}
+function connectFlowNodes(from, to) {
+  if (!app.flowDraft || !from || !to || from === to) return;
+  if (app.flowDraft.edges.some(edge => edge.from === from && edge.to === to)) return;
+  app.flowDraft.edges.push({ id: newFlowId('edge'), from, to }); app.flowDirty = true; app.flowConnectFrom = null; renderFlowEditor();
+}
+function removeFlowEdge(id) {
+  if (!app.flowDraft) return;
+  app.flowDraft.edges = app.flowDraft.edges.filter(edge => edge.id !== id); app.flowDirty = true; renderFlowEditor();
+}
+
+
+function flowSourcePayload() {
+  if (!app.flowDraft) return null;
+  return {
+    name: ($('#flowName')?.value || app.flowDraft.name || '').trim(),
+    enabled: $('#flowEnabled')?.checked !== false,
+    description: app.flowDraft.description || '',
+    nodes: app.flowDraft.nodes || [], edges: app.flowDraft.edges || [],
+  };
+}
+
+function downloadJsonFile(filename, data) {
+  const blob = new Blob([JSON.stringify(data, null, 2)], { type: 'application/json' });
+  const url = URL.createObjectURL(blob); const a = document.createElement('a');
+  a.href = url; a.download = filename; document.body.appendChild(a); a.click(); a.remove();
+  setTimeout(() => URL.revokeObjectURL(url), 0);
+}
+
+async function exportFlow() {
+  if (!app.flowDraft) return;
+  try {
+    const envelope = app.flowDraft.id && !app.flowDirty
+      ? await api(`/api/flows/${encodeURIComponent(app.flowDraft.id)}/export`)
+      : { format: 'gree-controller-flow', version: 1, exported_at: new Date().toISOString(), flow: flowSourcePayload() };
+    const safe = (flowSourcePayload()?.name || 'flow').replace(/[^a-z0-9_-]+/gi, '-').replace(/^-+|-+$/g, '').toLowerCase() || 'flow';
+    downloadJsonFile(`${safe}.flow.json`, envelope); toast(tr('flow.exported'));
+  } catch (error) { toast(error.message, true); }
+}
+
+async function importFlowFile(file) {
+  if (!file) return;
+  try {
+    const payload = JSON.parse(await file.text());
+    const saved = await api('/api/flows/import', { method: 'POST', body: payload });
+    const index = app.flows.findIndex(flow => flow.id === saved.id); if (index >= 0) app.flows[index] = saved; else app.flows.push(saved);
+    renderFlows(); await loadBootstrap(); openFlowEditor(saved.id); toast(tr('flow.imported'));
+  } catch (error) { toast(`${tr('flow.importFailed')}: ${error.message}`, true); }
+  finally { const input = $('#flowImportFile'); if (input) input.value = ''; }
+}
+
+function flowTemplateGraph(key) {
+  const zone = app.zones[0]?.id || '', device = app.devices[0]?.id || '', group = app.groups[0]?.id || '';
+  const nodes = [], edges = [];
+  const add = (kind, x, y, config = flowDefaultConfig(kind)) => { const node = { id: newFlowId('node'), kind, x, y, config: { ...config } }; nodes.push(node); return node; };
+  const link = (a, b) => edges.push({ id: newFlowId('edge'), from: a.id, to: b.id });
+  let titleKey = `flow.template.${key}.title`, descriptionKey = `flow.template.${key}.description`;
+  if (key === 'workday_comfort') {
+    const days=add('weekday',50,80), time=add('time_range',250,80,{start:'06:00',end:'08:30'}), action=add('zone_thermostat',500,80,{zone_id:zone,preset:'comfort',setpoint:21,mode:'auto',cooldown_seconds:60}); link(days,time); link(time,action);
+  } else if (key === 'weather_comfort') {
+    const days=add('weekday',40,50), time=add('time_range',40,170,{start:'06:00',end:'22:30'}), outside=add('outdoor_temperature',40,290,{operator:'lt',value:12}), and=add('logic_and',290,160), action=add('zone_thermostat',520,160,{zone_id:zone,preset:'comfort',setpoint:21,mode:'auto',cooldown_seconds:60}); link(days,and); link(time,and); link(outside,and); link(and,action);
+  } else if (key === 'smart_demand') {
+    const time=add('time_range',35,65,{start:'05:30',end:'23:00'}), outside=add('outdoor_temperature',35,185,{operator:'lt',value:10}), room=add('zone_temperature',35,305,{zone_id:zone,operator:'lt',value:20}), or=add('logic_or',280,245), mode=add('house_mode',280,80,{operator:'neq',value:'off'}), and=add('logic_and',500,165), action=add('zone_thermostat',735,165,{zone_id:zone,preset:'comfort',setpoint:21,mode:'auto',cooldown_seconds:90}); link(outside,or); link(room,or); link(time,and); link(mode,and); link(or,and); link(and,action);
+  } else if (key === 'device_resilience') {
+    const online=add('device_state',45,70,{device_id:device,field:'online',operator:'eq',value:'true'}), enabled=add('device_state',45,190,{device_id:device,field:'enabled',operator:'eq',value:'true'}), mode=add('house_mode',45,310,{operator:'neq',value:'off'}), and=add('logic_and',315,190), action=add('zone_thermostat',570,190,{zone_id:zone,preset:'auto',setpoint:21,mode:'auto',cooldown_seconds:60}); link(online,and); link(enabled,and); link(mode,and); link(and,action);
+  } else if (key === 'night_group') {
+    const time=add('time_range',60,120,{start:'22:30',end:'06:00'}), mode=add('house_mode',60,250,{operator:'neq',value:'off'}), and=add('logic_and',310,180), action=group ? add('group_action',560,180,{group_id:group,power:true,mode:'auto',preset:'sleep',cooldown_seconds:120}) : add('zone_thermostat',560,180,{zone_id:zone,preset:'sleep',setpoint:20,mode:'auto',cooldown_seconds:120}); link(time,and); link(mode,and); link(and,action);
+  } else if (key === 'ha_window_guard') {
+    const open=add('ha_state',45,120,{entity_id:'binary_sensor.window',operator:'eq',value:'on'}), mode=add('house_mode',45,250,{operator:'neq',value:'off'}), and=add('logic_and',300,180), action=add('zone_thermostat',555,180,{zone_id:zone,preset:'auto',setpoint:21,mode:'auto',power:false,cooldown_seconds:60}); link(open,and); link(mode,and); link(and,action);
+  } else if (key === 'presence_eco') {
+    const home=add('ha_state',45,80,{entity_id:'person.someone',operator:'eq',value:'home'}), away=add('ha_state',45,250,{entity_id:'person.someone',operator:'eq',value:'not_home'}), comfort=add('zone_thermostat',355,70,{zone_id:zone,preset:'comfort',setpoint:21,mode:'auto',cooldown_seconds:120}), eco=add('zone_thermostat',355,250,{zone_id:zone,preset:'away',setpoint:18,mode:'auto',cooldown_seconds:120}); link(home,comfort); link(away,eco);
+  } else if (key === 'frost_guard') {
+    const heat=add('house_mode',35,55,{operator:'eq',value:'heat'}), outside=add('outdoor_temperature',35,180,{operator:'lt',value:3}), room=add('zone_temperature',35,305,{zone_id:zone,operator:'lt',value:9}), and=add('logic_and',315,180), action=add('zone_thermostat',575,180,{zone_id:zone,preset:'custom',setpoint:12,mode:'heat',cooldown_seconds:300}); link(heat,and); link(outside,and); link(room,and); link(and,action);
+  } else if (key === 'nested_guard') {
+    const days=add('weekday',30,40), time=add('time_range',30,150,{start:'06:00',end:'22:30'}), outside=add('outdoor_temperature',30,270,{operator:'lt',value:8}), room=add('zone_temperature',30,390,{zone_id:zone,operator:'lt',value:20}), or=add('logic_or',285,330), available=add('ha_available',285,450,{entity_id:'binary_sensor.window'}), window=add('ha_state',285,560,{entity_id:'binary_sensor.window',operator:'eq',value:'on'}), not=add('logic_not',500,560), and=add('logic_and',520,245), action=add('zone_thermostat',780,245,{zone_id:zone,preset:'comfort',setpoint:21,mode:'auto',cooldown_seconds:90}); link(outside,or); link(room,or); link(window,not); link(days,and); link(time,and); link(or,and); link(available,and); link(not,and); link(and,action);
+  } else if (key === 'night_quiet') {
+    const night=add('night_mode',50,100), and=add('logic_and',315,165), action=group ? add('group_action',565,165,{group_id:group,power:null,mode:'auto',preset:'sleep',cooldown_seconds:180}) : add('zone_thermostat',565,165,{zone_id:zone,preset:'sleep',setpoint:20,mode:'auto',cooldown_seconds:180}); link(night,and); if (group) { const groupOn=add('group_state',50,235,{group_id:group,field:'power_enabled',operator:'eq',value:'true'}); link(groupOn,and); } link(and,action);
+  }
+  return { titleKey, descriptionKey, nodes, edges };
+}
+
+const FLOW_TEMPLATE_KEYS = ['workday_comfort','weather_comfort','smart_demand','device_resilience','night_group','ha_window_guard','presence_eco','frost_guard','nested_guard','night_quiet'];
+function openFlowTemplates() {
+  if (!app.flowDraft) return;
+  const host = $('#flowTemplateList');
+  host.innerHTML = FLOW_TEMPLATE_KEYS.map(key => `<button type="button" class="flow-template-card" data-flow-template="${esc(key)}"><strong>${esc(tr(`flow.template.${key}.title`))}</strong><span>${esc(tr(`flow.template.${key}.description`))}</span></button>`).join('');
+  $('#flowTemplateDialog')?.showModal();
+}
+function applyFlowTemplate(key) {
+  if (!app.flowDraft) return;
+  if (app.flowDraft.nodes.length && !confirm(tr('flow.templateReplaceConfirm'))) return;
+  const template = flowTemplateGraph(key); app.flowDraft.nodes = template.nodes; app.flowDraft.edges = template.edges;
+  app.flowDraft.description = tr(template.descriptionKey); app.flowSelectedNodeId = null; app.flowDirty = true;
+  if (!app.flowDraft.id || $('#flowName').value === tr('flow.newDefaultName')) $('#flowName').value = tr(template.titleKey);
+  $('#flowTemplateDialog')?.close(); renderFlowEditor();
+}
+
+function localDateTimeInputValue(date = new Date()) {
+  const pad = value => String(value).padStart(2, '0');
+  return `${date.getFullYear()}-${pad(date.getMonth()+1)}-${pad(date.getDate())}T${pad(date.getHours())}:${pad(date.getMinutes())}`;
+}
+function flowSimulationOverrideNodes() {
+  return (app.flowDraft?.nodes || []).filter(node => ['outdoor_temperature','device_temperature','zone_temperature','ha_state','ha_numeric','ha_attribute','ha_available','house_mode','device_state','zone_state','group_state','night_mode'].includes(node.kind));
+}
+function renderFlowSimulationOverrides() {
+  const host = $('#flowSimulationOverrides'); if (!host) return;
+  const nodes = flowSimulationOverrideNodes();
+  host.innerHTML = nodes.length ? nodes.map(node => {
+    const numeric = ['outdoor_temperature','device_temperature','zone_temperature','ha_numeric'].includes(node.kind);
+    return `<label><span>${esc(flowNodeTitle(FLOW_NODE_META[node.kind]))} · ${esc(flowNodeSummary(node))}</span><input ${numeric ? 'type="number" step="0.1"' : 'type="text"'} data-flow-sim-node="${esc(node.id)}" placeholder="${esc(tr('flow.useLiveValue'))}"></label>`;
+  }).join('') : `<p class="field-note">${esc(tr('flow.noSimulationOverrides'))}</p>`;
+}
+function collectFlowSimulationOverrides() {
+  const result = {};
+  $$('[data-flow-sim-node]', $('#flowSimulationOverrides')).forEach(input => {
+    if (input.value.trim() === '') return;
+    const node = flowNodeById(input.dataset.flowSimNode); let value = input.value.trim();
+    if (node && ['outdoor_temperature','device_temperature','zone_temperature','ha_numeric'].includes(node.kind)) value = Number(value);
+    else if (/^(true|false)$/i.test(value)) value = value.toLowerCase() === 'true';
+    result[input.dataset.flowSimNode] = value;
+  });
+  return result;
+}
+function openFlowDryRun() {
+  if (!app.flowDraft) return;
+  $('#flowTestTitle').textContent = tr('flow.dryRun'); $('#flowSimulationControls').hidden = false; $('#flowTestResults').innerHTML = '';
+  $('#flowSimulationAt').value = localDateTimeInputValue(); renderFlowSimulationOverrides(); $('#flowTestDialog')?.showModal();
+}
+function renderFlowDryRunResult(result) {
+  const host = $('#flowTestResults');
+  const actionName = id => flowNodeById(id) ? `${flowNodeTitle(FLOW_NODE_META[flowNodeById(id).kind])}: ${flowNodeSummary(flowNodeById(id))}` : id;
+  host.innerHTML = `<div class="flow-test-summary"><strong>${esc(result.summary || tr('flow.dryRun'))}</strong><span>${esc(tr('flow.compiledPreview', result.compiled || { schedules:0, automations:0 }))}</span></div>${(result.actions || []).map(action => `<article class="flow-test-action ${action.would_execute ? 'pass' : 'blocked'}"><div><strong>${esc(actionName(action.node_id))}</strong><span class="badge ${action.would_execute ? 'active' : ''}">${esc(action.would_execute ? tr('flow.wouldExecute') : action.matched ? tr('flow.blockedByOwnership') : tr('flow.conditionFalse'))}</span></div>${action.blocked_reason ? `<p>${esc(tr('flow.blockReason'))}: <code>${esc(action.blocked_reason)}</code></p>` : ''}<div class="flow-trace">${(action.trace || []).map(item => `<div><span>${item.matched ? '✓' : '×'} ${esc(flowNodeTitle(FLOW_NODE_META[item.kind] || { title:item.kind }))}</span><code>${esc(JSON.stringify(item.actual))}</code></div>`).join('')}</div></article>`).join('')}`;
+}
+async function runFlowDryRun() {
+  if (!app.flowDraft) return;
+  const input = $('#flowSimulationAt').value; const at = input ? new Date(input).toISOString() : new Date().toISOString();
+  $('#flowTestResults').innerHTML = `<p class="field-note">${esc(tr('flow.runningSimulation'))}</p>`;
+  try {
+    const result = await api('/api/flows/simulate', { method:'POST', body:{ flow:flowSourcePayload(), flow_id:app.flowDraft.id || null, at, overrides:collectFlowSimulationOverrides(), log:true } });
+    renderFlowDryRunResult(result);
+  } catch (error) { $('#flowTestResults').innerHTML = `<div class="empty compact"><strong>${esc(tr('flow.simulationFailed'))}</strong><span>${esc(error.message)}</span></div>`; }
+}
+async function openFlowLogs() {
+  if (!app.flowDraft?.id) return toast(tr('flow.saveBeforeLogs'), true);
+  $('#flowTestTitle').textContent = tr('flow.logs'); $('#flowSimulationControls').hidden = true; $('#flowTestResults').innerHTML = `<p class="field-note">${esc(tr('common.loading'))}</p>`; $('#flowTestDialog')?.showModal();
+  try {
+    const result = await api(`/api/flows/${encodeURIComponent(app.flowDraft.id)}/logs?limit=150`);
+    const events = result.events || [];
+    $('#flowTestResults').innerHTML = events.length ? events.map(event => `<article class="flow-log-row"><div><strong>${esc(event.kind)}</strong><span class="badge">${esc(event.level)}</span></div><p>${esc(event.message)}</p><small>${esc(new Date(event.timestamp).toLocaleString())}</small></article>`).join('') : `<div class="empty compact"><strong>${esc(tr('flow.noLogs'))}</strong></div>`;
+  } catch (error) { $('#flowTestResults').innerHTML = `<div class="empty compact"><strong>${esc(tr('flow.logsFailed'))}</strong><span>${esc(error.message)}</span></div>`; }
+}
+
+async function saveFlow() {
+  if (!app.flowDraft) return;
+  const name = $('#flowName').value.trim(); if (!name) return toast(tr('flow.nameRequired'), true);
+  const body = { name, enabled: $('#flowEnabled').checked, description: app.flowDraft.description || '', nodes: app.flowDraft.nodes, edges: app.flowDraft.edges };
+  if (app.flowDraft.id) body.expected_revision = Number(app.flowDraft.revision || 0);
+  try {
+    const saved = await api(app.flowDraft.id ? `/api/flows/${encodeURIComponent(app.flowDraft.id)}` : '/api/flows', { method: app.flowDraft.id ? 'PUT' : 'POST', body });
+    const index = app.flows.findIndex(flow => flow.id === saved.id); if (index >= 0) app.flows[index] = saved; else app.flows.push(saved);
+    app.flowDraft = flowDraftFrom(saved); app.flowDirty = false; renderFlows(); renderFlowEditor(); updateBrowserUrl(`/flows/${saved.id}`, true); await loadBootstrap(); toast(tr('flow.saved'));
+  } catch (error) { toast(error.message, true); }
+}
+
+async function deleteFlow(id) {
+  const flow = app.flows.find(item => item.id === id); if (!flow) return;
+  if (!confirm(tr('flow.deleteConfirm', { name: flow.name }))) return;
+  try { await api(`/api/flows/${encodeURIComponent(id)}`, { method: 'DELETE' }); app.flows = app.flows.filter(item => item.id !== id); renderFlows(); await loadBootstrap(); toast(tr('flow.deleted')); } catch (error) { toast(error.message, true); }
+}
+
+function updateFlowConfig(input) {
+  const node = flowNodeById(app.flowSelectedNodeId); if (!node) return;
+  const key = input.dataset.flowConfig; if (!key) return;
+  if (key === 'days') node.config.days = $$('[data-flow-config="days"]', $('#flowInspector')).filter(el => el.checked).map(el => Number(el.value));
+  else if (['power','swing_vertical','swing_horizontal','quiet','turbo','light','air','xfan','health','sleep'].includes(key)) node.config[key] = input.value === '' ? null : input.value === 'true';
+  else if (key === 'value' && node.kind === 'constant') node.config[key] = input.value === 'true';
+  else if (['value','setpoint','target_temperature','cooldown_seconds','fan_speed'].includes(key) && ['outdoor_temperature','device_temperature','zone_temperature','ha_numeric','zone_thermostat','device_action','group_action'].includes(node.kind)) node.config[key] = input.value === '' ? null : Number(input.value);
+  else node.config[key] = input.value;
+  app.flowDirty = true; renderFlowEditor();
+}
+
+let flowDrag = null;
+document.addEventListener('pointerdown', event => {
+  const nodeEl = event.target.closest?.('[data-flow-node]');
+  if (!nodeEl || event.target.closest('button,input,select,label')) return;
+  const node = flowNodeById(nodeEl.dataset.flowNode); if (!node) return;
+  app.flowSelectedNodeId = node.id; renderFlowInspector();
+  flowDrag = { id: node.id, x: event.clientX, y: event.clientY, left: Number(node.x || 0), top: Number(node.y || 0) };
+  nodeEl.setPointerCapture?.(event.pointerId); event.preventDefault();
+});
+document.addEventListener('pointermove', event => {
+  if (!flowDrag || !app.flowDraft) return;
+  const node = flowNodeById(flowDrag.id); if (!node) return;
+  node.x = Math.max(12, flowDrag.left + event.clientX - flowDrag.x); node.y = Math.max(12, flowDrag.top + event.clientY - flowDrag.y); app.flowDirty = true;
+  const el = $(`[data-flow-node="${CSS.escape(node.id)}"]`); if (el) { el.style.left = `${node.x}px`; el.style.top = `${node.y}px`; renderFlowEdges(); }
+});
+document.addEventListener('pointerup', () => { flowDrag = null; });
+
+document.addEventListener('click', event => {
+  const edge = event.target.closest?.('[data-flow-edge]'); if (edge) { removeFlowEdge(edge.dataset.flowEdge); return; }
+  const add = event.target.closest?.('[data-flow-add]'); if (add) { addFlowNode(add.dataset.flowAdd); return; }
+  const template = event.target.closest?.('[data-flow-template]'); if (template) { applyFlowTemplate(template.dataset.flowTemplate); return; }
+  const remove = event.target.closest?.('[data-flow-remove]'); if (remove) { removeFlowNode(remove.dataset.flowRemove); return; }
+  const output = event.target.closest?.('[data-flow-output]'); if (output) { app.flowConnectFrom = output.dataset.flowOutput; renderFlowEditor(); return; }
+  const input = event.target.closest?.('[data-flow-input]'); if (input) { if (app.flowConnectFrom) connectFlowNodes(app.flowConnectFrom, input.dataset.flowInput); return; }
+  const node = event.target.closest?.('[data-flow-node]'); if (node) { app.flowSelectedNodeId = node.dataset.flowNode; renderFlowEditor(); return; }
+  const action = event.target.closest?.('[data-action]')?.dataset.action;
+  if (action === 'new-flow') openFlowEditor();
+  else if (action === 'edit-flow') openFlowEditor(event.target.closest('[data-action]').dataset.id);
+  else if (action === 'delete-flow') deleteFlow(event.target.closest('[data-action]').dataset.id);
+  else if (action === 'save-flow') saveFlow();
+  else if (action === 'import-flow') $('#flowImportFile')?.click();
+  else if (action === 'export-flow') exportFlow();
+  else if (action === 'flow-templates') openFlowTemplates();
+  else if (action === 'flow-dry-run') openFlowDryRun();
+  else if (action === 'run-flow-dry-run') runFlowDryRun();
+  else if (action === 'flow-logs') openFlowLogs();
+  else if (action === 'close-flow-editor') closeFlowEditor();
+});
+document.addEventListener('change', event => { if (event.target.matches?.('[data-flow-config]')) updateFlowConfig(event.target); });
+$('#flowImportFile')?.addEventListener('change', event => importFlowFile(event.target.files?.[0]));
+$('#flowName')?.addEventListener('input', () => { if (app.flowDraft) app.flowDirty = true; });
+$('#flowEnabled')?.addEventListener('change', () => { if (app.flowDraft) app.flowDirty = true; });
+window.addEventListener('resize', () => { if (!$('#flowEditor')?.hidden) renderFlowEdges(); });
@@ -16,9 +16,10 @@ function setDashboardTab(tab, { scroll = true } = {}) {

 function showView(name, { push = true, scroll = true } = {}) {
  if (!canLeaveCurrentView(name)) return false;
+  if (name !== 'flows' && !$('#flowEditor')?.hidden) closeFlowEditor({ push: false, force: true });
  app.currentView = name;
  $$('.view').forEach(view => view.classList.toggle('active', view.dataset.view === name));
-  $$('.bottom-nav button').forEach(button => button.classList.toggle('active', button.dataset.nav === name || (button.dataset.nav === 'more' && ['groups', 'schedules', 'automations', 'simulation', 'night', 'homeassistant', 'settings', 'logs'].includes(name))));
+  $$('.bottom-nav button').forEach(button => button.classList.toggle('active', button.dataset.nav === name || (button.dataset.nav === 'more' && ['groups', 'flows', 'schedules', 'automations', 'simulation', 'night', 'homeassistant', 'settings', 'logs'].includes(name))));
  if (push) updateBrowserUrl(pathForView(name));
  if (scroll) window.scrollTo({ top: 0, behavior: 'smooth' });
  if (name === 'dashboard') setDashboardTab(app.dashboardTab, { scroll: false });
@@ -23,7 +23,8 @@ function connectWebSocket() {
    try {
      const message = JSON.parse(event.data);
      if (message.event === 'bootstrap') {
-        const data = message.data; app.devices = data.devices || []; app.zones = data.zones || []; app.groups = data.groups || []; app.schedules = data.schedules || []; app.automations = data.automations || []; app.settings = data.settings || app.settings; app.sensorAliases = { ...(app.settings?.home_assistant?.sensor_aliases || {}) }; app.system = data.system || app.system; app.systemSnapshotAt = Date.now(); app.outdoorTemperature = Number.isFinite(Number(data.outdoor_temperature)) ? Number(data.outdoor_temperature) : app.outdoorTemperature; renderAll(); scheduleControlPlanLoad(); if (app.settings?.debug?.overlay_enabled) loadDebugBacklog(); return;
+        const data = message.data; app.devices = data.devices || []; app.zones = data.zones || []; app.groups = data.groups || []; app.schedules = data.schedules || []; app.automations = data.automations || [];
+        app.flows = data.flows || []; app.settings = data.settings || app.settings; app.sensorAliases = { ...(app.settings?.home_assistant?.sensor_aliases || {}) }; app.system = data.system || app.system; app.systemSnapshotAt = Date.now(); app.outdoorTemperature = Number.isFinite(Number(data.outdoor_temperature)) ? Number(data.outdoor_temperature) : app.outdoorTemperature; renderAll(); scheduleControlPlanLoad(); if (app.settings?.debug?.overlay_enabled) loadDebugBacklog(); return;
      }
      const data = message.data || {};
      if (['device.updated', 'device.created'].includes(message.event)) { updateDevice(data); renderSummary(); renderDevices(); renderGroups(); scheduleControlPlanLoad(); }
@@ -33,6 +34,8 @@ function connectWebSocket() {
      else if (message.event === 'zone.deleted') { app.zones = app.zones.filter(v => v.id !== data.id); renderAll(); scheduleControlPlanLoad(); }
      else if (['group.updated', 'group.created'].includes(message.event)) { const i = app.groups.findIndex(v => v.id === data.id); if (i >= 0) app.groups[i] = data; else app.groups.push(data); renderGroups(); fillSelects(); scheduleControlPlanLoad(); }
      else if (message.event === 'group.deleted') { app.groups = app.groups.filter(v => v.id !== data.id); renderGroups(); fillSelects(); scheduleControlPlanLoad(); }
+      else if (['flow.updated', 'flow.created'].includes(message.event)) { const i = app.flows.findIndex(v => v.id === data.id); if (i >= 0) app.flows[i] = data; else app.flows.push(data); renderFlows(); scheduleControlPlanLoad(); }
+      else if (message.event === 'flow.deleted') { app.flows = app.flows.filter(v => v.id !== data.id); renderFlows(); scheduleControlPlanLoad(); }
      else if (message.event === 'settings.updated') {
        const settingsDirty = isFormDirty($('#settingsForm')), nightDirty = isFormDirty($('#nightModeForm')), haDirty = isFormDirty($('#homeAssistantForm'));
        app.settings = data;
@@ -56,7 +59,7 @@ function connectWebSocket() {
      else if (message.event === 'gree.frame') { if (app.settings?.debug?.overlay_enabled) debugLine('GREE', `${data.direction || '?'} ${data.protocol_version || ''}`, data.device_name || data.device_id || data.target || '', message.timestamp, data.payload); }
      else if (message.event === 'api.request') { if (app.settings?.debug?.overlay_enabled) debugLine('HTTP', `${data.method || '?'} ${data.status || ''}`, `${data.path || ''} · ${data.duration_ms ?? '?'} ms`, message.timestamp); }
      else if (message.event === 'log.created') { if (app.settings?.debug?.overlay_enabled) debugLine('API', data.kind || data.level || 'log', data.message || '', message.timestamp, data.metadata); if (app.currentView === 'logs') loadLogs(); }
-      else if (message.event.startsWith('schedule.') || message.event.startsWith('automation.')) scheduleControlPlanLoad();
+      else if (message.event.startsWith('schedule.') || message.event.startsWith('automation.') || message.event.startsWith('flow.')) scheduleControlPlanLoad();
    } catch (_) { }
  };
 }
@@ -5,6 +5,7 @@ const VIEW_ROUTES = Object.freeze({
  groups: '/groups',
  schedules: '/schedules',
  automations: '/automations',
+  flows: '/flows',
  simulation: '/simulation',
  night: '/night-mode',
  homeassistant: '/home-assistant',
@@ -84,6 +85,10 @@ function applyRouteFromLocation() {
    return;
  }

+  if (first === 'flows') {
+    if (parts[1]) requestAnimationFrame(() => openFlowEditor(parts[1] === 'new' ? '' : parts[1], { push: false }));
+    else if (!$('#flowEditor')?.hidden) closeFlowEditor({ push: false, force: true });
+  }
  if (!parts.length || first === 'index.html') updateBrowserUrl(VIEW_ROUTES.dashboard, true);
 }

@@ -6123,3 +6123,106 @@ textarea[aria-invalid="true"] {
    justify-self: start;
  }
 }
+/* Visual Flow editor */
+.flow-info-panel { display:flex; align-items:center; justify-content:space-between; gap:20px; }
+.flow-info-panel p { margin:.35rem 0 0; color:var(--muted); max-width:780px; }
+.flow-card .card-footer small { max-width:70%; }
+body.flow-editor-open { overflow:hidden; }
+.flow-editor { position:fixed; inset:0; z-index:80; background:var(--bg); display:flex; flex-direction:column; }
+.flow-editor[hidden] { display:none !important; }
+.flow-editor-bar { min-height:76px; display:flex; align-items:center; justify-content:space-between; gap:20px; padding:10px 18px; border-bottom:1px solid var(--line); background:var(--surface); }
+.flow-editor-title { display:flex; align-items:center; gap:12px; min-width:0; }
+.flow-editor-title > div { display:grid; gap:2px; min-width:0; }
+.flow-editor-title input { border:0; background:transparent; color:var(--text); font-weight:750; font-size:1.12rem; padding:2px 0; min-width:280px; outline:none; }
+.flow-editor-actions { display:flex; align-items:center; gap:10px; }
+.flow-enabled { display:flex; align-items:center; gap:8px; color:var(--muted); }
+.flow-editor-body { flex:1; min-height:0; display:grid; grid-template-columns:220px minmax(420px,1fr) 300px; }
+.flow-palette,.flow-inspector { background:var(--surface); overflow:auto; padding:16px; }
+.flow-palette { border-right:1px solid var(--line); }
+.flow-inspector { border-left:1px solid var(--line); }
+.flow-palette-head { display:grid; gap:4px; margin-bottom:18px; }
+.flow-palette-head small { color:var(--muted); line-height:1.35; }
+.flow-palette-group { display:grid; gap:7px; margin:0 0 18px; }
+.flow-palette-group > span { color:var(--muted); font-size:.72rem; font-weight:750; text-transform:uppercase; letter-spacing:.08em; margin-bottom:2px; }
+.flow-palette-group button { text-align:left; border:1px solid var(--line); background:var(--surface-2); color:var(--text); border-radius:10px; padding:9px 10px; }
+.flow-palette-group button:hover { border-color:var(--accent-border); background:var(--accent-soft); }
+.flow-workspace-wrap { min-width:0; min-height:0; display:grid; grid-template-rows:minmax(0,1fr) auto; background:var(--canvas); }
+.flow-workspace { position:relative; min-height:0; overflow:auto; outline:none; background-color:var(--canvas); background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px); background-size:24px 24px; }
+.flow-nodes { position:relative; width:2400px; height:1500px; }
+.flow-edges { position:absolute; inset:0; width:2400px; height:1500px; overflow:visible; pointer-events:none; z-index:1; }
+.flow-edges path { fill:none; stroke:var(--muted-2); stroke-width:2.5; pointer-events:stroke; cursor:pointer; }
+.flow-edges path:hover { stroke:var(--danger); stroke-width:4; }
+.flow-editor .flow-node { position:absolute; z-index:2; display:block; align-content:normal; gap:0; width:170px; min-height:78px; padding:0; border:1px solid var(--line-strong); border-radius:12px; background:var(--surface); box-shadow:0 10px 28px rgba(0,0,0,.18); user-select:none; }
+.flow-editor .flow-node.selected { border-color:var(--accent); box-shadow:0 0 0 2px var(--accent-soft),0 12px 30px rgba(0,0,0,.22); }
+.flow-editor .flow-node-time { border-top:3px solid var(--blue); }
+.flow-editor .flow-node-sensor { border-top:3px solid var(--teal); }
+.flow-editor .flow-node-logic { border-top:3px solid var(--purple); }
+.flow-editor .flow-node-action { border-top:3px solid var(--orange); }
+.flow-editor .flow-node-head { display:flex; justify-content:space-between; gap:8px; align-items:center; padding:8px 9px 6px; font-size:.82rem; font-weight:750; cursor:grab; }
+.flow-editor .flow-node-head button { border:0; background:transparent; color:var(--muted); padding:0 2px; font-size:1rem; }
+.flow-editor .flow-node-body { padding:5px 10px 10px; color:var(--muted); font-size:.76rem; line-height:1.35; overflow-wrap:anywhere; }
+.flow-editor .flow-port { position:absolute; top:50%; width:14px; height:14px; margin-top:-7px; border-radius:50%; border:2px solid var(--surface); background:var(--muted-2); padding:0; z-index:4; }
+.flow-editor .flow-port-in { left:-8px; }
+.flow-editor .flow-port-out { right:-8px; }
+.flow-editor .flow-port:hover,.flow-editor .flow-port.armed { background:var(--accent); transform:scale(1.15); }
+.flow-empty-hint { position:absolute; z-index:0; left:50%; top:42%; transform:translate(-50%,-50%); text-align:center; display:grid; gap:5px; color:var(--muted); pointer-events:none; }
+.flow-natural-preview { display:grid; grid-template-columns:auto 1fr; gap:14px; align-items:center; min-height:58px; padding:10px 18px; border-top:1px solid var(--line); background:var(--surface); }
+.flow-natural-preview span { color:var(--muted); font-size:.86rem; line-height:1.4; }
+.flow-inspector-head { display:flex; align-items:flex-start; justify-content:space-between; gap:10px; margin-bottom:18px; }
+.flow-inspector-head h3 { margin:2px 0 0; }
+.flow-inspector label { display:grid; gap:6px; margin-bottom:13px; color:var(--muted); font-size:.82rem; }
+.flow-inspector input,.flow-inspector select { width:100%; border:1px solid var(--line); border-radius:10px; background:var(--input-bg); color:var(--text); padding:9px 10px; }
+.flow-inspector .two { display:grid; grid-template-columns:1fr 1fr; gap:10px; }
+.flow-day-grid { display:grid; grid-template-columns:1fr 1fr; gap:7px; }
+.flow-day-grid label { display:flex; align-items:center; gap:7px; padding:8px; border:1px solid var(--line); border-radius:9px; margin:0; }
+.flow-day-grid input { width:auto; }
+.flow-inspector-meta { display:grid; gap:5px; margin-top:20px; padding-top:14px; border-top:1px solid var(--line); color:var(--muted); }
+.flow-inspector-meta code { font-size:.72rem; overflow-wrap:anywhere; }
+
+@media (max-width: 980px) {
+  .flow-editor-body { grid-template-columns:180px minmax(360px,1fr) 260px; }
+  .flow-editor-title input { min-width:180px; }
+}
+@media (max-width: 760px) {
+  .flow-editor-bar { align-items:flex-start; flex-direction:column; }
+  .flow-editor-actions { width:100%; justify-content:flex-end; }
+  .flow-editor-body { grid-template-columns:132px minmax(500px,1fr); }
+  .flow-inspector { position:absolute; right:0; top:138px; bottom:0; width:min(310px,86vw); z-index:8; box-shadow:-12px 0 30px rgba(0,0,0,.28); }
+  .flow-palette { padding:10px; }
+  .flow-palette-group button { font-size:.76rem; padding:8px; }
+  .flow-natural-preview { grid-template-columns:1fr; gap:4px; }
+}
+
+/* Flow diagnostics, templates and portable Flow files */
+.flow-tool-dialog { width:min(860px,calc(100vw - 32px)); max-height:min(820px,calc(100vh - 32px)); overflow:auto; border:1px solid var(--line); border-radius:16px; background:var(--surface); color:var(--text); padding:18px; box-shadow:0 24px 70px rgba(0,0,0,.32); }
+.flow-tool-dialog::backdrop { background:rgba(0,0,0,.48); }
+.flow-template-list { display:grid; grid-template-columns:repeat(auto-fit,minmax(230px,1fr)); gap:12px; margin-top:16px; }
+.flow-template-card { display:grid; gap:7px; text-align:left; align-content:start; min-height:118px; border:1px solid var(--line); border-radius:14px; background:var(--surface-2); color:var(--text); padding:14px; }
+.flow-template-card:hover { border-color:var(--accent); }
+.flow-template-card span { color:var(--muted); font-size:.86rem; line-height:1.4; }
+.flow-simulation-controls { display:grid; gap:14px; padding:4px 0 16px; border-bottom:1px solid var(--line); }
+.flow-simulation-overrides { display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:10px; margin-top:8px; }
+.flow-test-results { display:grid; gap:10px; margin-top:16px; }
+.flow-test-summary,.flow-test-action,.flow-log-row { border:1px solid var(--line); border-radius:12px; background:var(--surface-2); padding:12px; }
+.flow-test-summary { display:flex; justify-content:space-between; gap:12px; align-items:center; }
+.flow-test-action > div:first-child,.flow-log-row > div:first-child { display:flex; justify-content:space-between; gap:10px; align-items:center; }
+.flow-test-action.pass { border-left:4px solid var(--green); }
+.flow-test-action.blocked { border-left:4px solid var(--line-strong); }
+.flow-trace { display:grid; gap:5px; margin-top:10px; }
+.flow-trace > div { display:flex; justify-content:space-between; gap:10px; padding-top:5px; border-top:1px solid var(--line); font-size:.82rem; }
+.flow-trace code { color:var(--muted); max-width:48%; overflow-wrap:anywhere; text-align:right; }
+.flow-log-row p { margin:8px 0 4px; }
+.flow-log-row small { color:var(--muted); }
+@media (max-width:760px) { .flow-test-summary { align-items:flex-start; flex-direction:column; } }
+.flow-editor-actions { flex-wrap:wrap; justify-content:flex-end; }
+.flow-editor-actions .secondary { padding-inline:10px; }
+@media (max-width:1100px) {
+  .flow-editor-bar { align-items:flex-start; }
+  .flow-editor-actions { max-width:70%; }
+}
+@media (max-width:760px) {
+  .flow-editor-actions { max-width:none; justify-content:flex-start; }
+}
+.flow-device-options { margin:10px 0; padding:10px 12px; border:1px solid var(--line); border-radius:12px; background:var(--surface-2); }
+.flow-device-options summary { cursor:pointer; font-weight:650; }
+.flow-device-options[open] summary { margin-bottom:10px; }