v0.4.2

docs/API.md

@@ -173,3 +173,15 @@ curl "$BASE/lang/en.json"
 ```
 
 `GET /lang/index.json` returns the automatically generated language catalog. `GET /lang/<code>.json` returns the corresponding language pack. Add a valid `lang/<code>.json` file and rebuild to expose a new language.
+
+### `GET /api/history`
+
+Returns rich per-zone climate history. Query parameters:
+
+- `zone_id=<zone id>` for one zone, or `zone_id=all` for all zones,
+- `hours=6|24|168|720`,
+- `limit` up to 20,000 rows.
+
+Each row contains `gree_temperature`, `external_temperature` (HA room sensor), `control_temperature`, `target_temperature`, `device_setpoint`, `outdoor_temperature`, `power`, `mode`, `fan_speed`, `demand`, `control_source`, and `active_preset`.
+
+The endpoint automatically downsamples in SQLite to keep charts responsive: 30-second buckets up to 6 hours, 2-minute buckets up to 24 hours, 10-minute buckets up to 7 days, and 30-minute buckets for longer ranges.

docs/PROJECT_SPEC.md

@@ -175,8 +175,12 @@ The zone controller supports `device`, `combined`, and `home_assistant` temperat
 - Every SQLite statement and schema definition is centralized in `src/queries.rs`; database/domain code must not embed SQL strings elsewhere.
 
 
-## Web UI design system (v0.4.1)
+## Web UI design system (v0.4.2)
 
 The embedded UI uses a compact Supabase-inspired dashboard language while retaining GREE Controller branding and information architecture. Light, Dark and System themes are driven by CSS design tokens. The visual system favors neutral layered surfaces, thin borders, 6-8 px radii, compact controls, a restrained green accent, no decorative shadows, a desktop sidebar and mobile bottom navigation.
 
-Tailwind CSS is an optional local build dependency only. `web/styles.css` is committed and embedded into the Rust binary, so production/LXC runtime has no CDN or Node.js dependency. UI source/build files are `web/tailwind.input.css`, `tailwind.config.js`, `package.json`, and `scripts/build-web.sh`.
+The UI uses a Supabase/Tailwind-inspired visual language but ships as a normal static `web/styles.css` file embedded into the Rust binary. There is no Node.js, npm, Tailwind CLI, CDN, or CSS build pipeline.
+
+### Rich zone history
+
+Zone history stores GREE temperature, optional Home Assistant room temperature, calculated control temperature, profile target, actual device setpoint, outdoor temperature assist, power, mode, fan speed, demand, active preset and control source. The UI can compare all zones on common temperature/target charts or inspect one zone in detail.