first commit

backend/app/schemas/auth.py

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+from pydantic import BaseModel, Field
+
+
+class UserResponse(BaseModel):
+    id: int
+    username: str
+    preferred_language: str = 'pl'
+    preferred_font: str = 'default'
+
+    model_config = {"from_attributes": True}
+
+
+class TokenResponse(BaseModel):
+    access_token: str
+    token_type: str = "bearer"
+    user: UserResponse
+
+
+class RegisterRequest(BaseModel):
+    username: str = Field(min_length=3, max_length=120)
+    password: str = Field(min_length=4, max_length=128)
+
+
+class ChangePasswordRequest(BaseModel):
+    current_password: str
+    new_password: str = Field(min_length=4, max_length=128)
+
+
+class UpdateUserPreferencesRequest(BaseModel):
+    preferred_language: str = Field(default='pl', min_length=2, max_length=8)
+    preferred_font: str = Field(default='default', min_length=2, max_length=32)

backend/app/schemas/backup.py

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+from datetime import datetime
+from typing import Literal
+
+from pydantic import BaseModel
+
+
+class BackupResponse(BaseModel):
+    id: int
+    router_id: int
+    router_name: str | None = None
+    file_path: str
+    file_name: str
+    backup_type: str
+    checksum: str | None = None
+    file_size: int | None = None
+    created_at: datetime
+
+    model_config = {'from_attributes': True}
+
+
+class BackupDiffLine(BaseModel):
+    type: Literal['context', 'added', 'removed', 'modified']
+    left_number: int | None = None
+    right_number: int | None = None
+    left_text: str = ''
+    right_text: str = ''
+
+
+class BackupDiffStats(BaseModel):
+    added: int = 0
+    removed: int = 0
+    modified: int = 0
+    context: int = 0
+
+
+class BackupDiffResponse(BaseModel):
+    left_backup_id: int
+    right_backup_id: int
+    left_file_name: str | None = None
+    right_file_name: str | None = None
+    diff_text: str
+    diff_html: str | None = None
+    stats: BackupDiffStats | None = None
+    lines: list[BackupDiffLine] = []
+
+
+class BulkActionRequest(BaseModel):
+    action: Literal['download', 'delete']
+    backup_ids: list[int]

backend/app/schemas/dashboard.py

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+from datetime import datetime
+
+from pydantic import BaseModel
+
+
+class StorageStats(BaseModel):
+    total: int
+    used: int
+    free: int
+    folder_used: int
+    usage_percent: float
+
+
+class OperationLogResponse(BaseModel):
+    id: int
+    message: str
+    timestamp: datetime
+
+    model_config = {"from_attributes": True}
+
+
+class DashboardResponse(BaseModel):
+    routers_count: int
+    export_count: int
+    binary_count: int
+    total_backups: int
+    storage: StorageStats
+    recent_logs: list[OperationLogResponse]

backend/app/schemas/router.py

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+import re
+from datetime import datetime
+
+from pydantic import BaseModel, Field, field_validator
+
+ALLOWED_NAME_REGEX = re.compile(r"^[A-Za-z0-9_-]+$")
+
+
+class RouterBase(BaseModel):
+    name: str = Field(min_length=1, max_length=120)
+    host: str = Field(min_length=1, max_length=255)
+    port: int = Field(default=22, ge=1, le=65535)
+    ssh_user: str = Field(default="admin", min_length=1, max_length=120)
+    ssh_key: str | None = None
+    ssh_password: str | None = None
+
+    @field_validator("name")
+    @classmethod
+    def validate_name(cls, value: str) -> str:
+        if not ALLOWED_NAME_REGEX.match(value):
+            raise ValueError("Only letters, digits, dashes and underscores are allowed")
+        return value
+
+
+class RouterCreate(RouterBase):
+    pass
+
+
+class RouterUpdate(BaseModel):
+    name: str | None = None
+    host: str | None = None
+    port: int | None = Field(default=None, ge=1, le=65535)
+    ssh_user: str | None = None
+    ssh_key: str | None = None
+    ssh_password: str | None = None
+
+
+class RouterResponse(RouterBase):
+    id: int
+    owner_id: int
+    last_connection_status: bool | None = None
+    last_connection_tested_at: datetime | None = None
+    last_connection_error: str | None = None
+    last_connection_hostname: str | None = None
+    last_connection_model: str | None = None
+    last_connection_version: str | None = None
+    last_connection_uptime: str | None = None
+    created_at: datetime | None = None
+
+    model_config = {"from_attributes": True}
+
+
+class RouterTestConnection(BaseModel):
+    success: bool
+    tested_at: datetime
+    model: str
+    uptime: str
+    hostname: str
+    version: str | None = None
+    error: str | None = None

backend/app/schemas/settings.py

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+from datetime import datetime
+
+from pydantic import BaseModel, EmailStr, Field, field_validator
+
+from app.core.config import settings as app_settings
+from app.core.cron_utils import CronValidationError, validate_cron_expression
+
+
+class SettingsBase(BaseModel):
+    backup_retention_days: int = 7
+    log_retention_days: int = 7
+    export_cron: str = ''
+    binary_cron: str = ''
+    retention_cron: str = ''
+    enable_auto_export: bool = False
+    connection_test_interval_minutes: int = Field(default=0, ge=0, le=1440)
+    global_ssh_key: str | None = None
+    pushover_token: str | None = None
+    pushover_userkey: str | None = None
+    notify_failures_only: bool = True
+    smtp_host: str | None = None
+    smtp_port: int = 587
+    smtp_login: str | None = None
+    smtp_password: str | None = None
+    smtp_notifications_enabled: bool = False
+    recipient_email: EmailStr | None = None
+
+    @field_validator('export_cron', 'binary_cron', 'retention_cron', mode='before')
+    @classmethod
+    def normalize_cron(cls, value: str | None) -> str:
+        return (value or '').strip()
+
+    @field_validator('global_ssh_key', mode='before')
+    @classmethod
+    def normalize_key(cls, value: str | None) -> str | None:
+        normalized = (value or '').strip()
+        return normalized or None
+
+    @field_validator('export_cron', 'binary_cron', 'retention_cron')
+    @classmethod
+    def validate_cron(cls, value: str) -> str:
+        if not value:
+            return value
+        try:
+            validate_cron_expression(value, app_settings.timezone)
+        except CronValidationError as exc:
+            raise ValueError(f'Invalid cron expression: {exc}') from exc
+        return value
+
+
+class SettingsUpdate(SettingsBase):
+    clear_global_ssh_key: bool = False
+
+
+class SettingsResponse(SettingsBase):
+    id: int
+    has_global_ssh_key: bool = False
+
+    model_config = {'from_attributes': True}
+
+
+class RevealSshKeyRequest(BaseModel):
+    password: str
+
+
+class RevealSshKeyResponse(BaseModel):
+    global_ssh_key: str | None = None
+
+
+class SchedulerJobStatus(BaseModel):
+    key: str
+    label: str
+    enabled: bool
+    cron: str | None = None
+    description: str
+    description_params: dict[str, str | int] | None = None
+    valid: bool
+    next_runs: list[datetime] = []
+    error: str | None = None
+
+
+class SchedulerStatusResponse(BaseModel):
+    timezone: str
+    running: bool
+    jobs: list[SchedulerJobStatus]

backend/app/schemas/swos_beta.py

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+from pydantic import BaseModel, Field, field_validator
+
+
+class SwosBetaCredentials(BaseModel):
+    host: str = Field(min_length=1, max_length=255)
+    port: int = Field(default=80, ge=1, le=65535)
+    username: str = Field(default='admin', min_length=1, max_length=120)
+    password: str = Field(default='', max_length=255)
+    label: str | None = Field(default=None, max_length=120)
+
+    @field_validator('host', 'username', 'password', mode='before')
+    @classmethod
+    def normalize_text(cls, value: str | None) -> str:
+        return (value or '').strip()
+
+    @field_validator('label', mode='before')
+    @classmethod
+    def normalize_label(cls, value: str | None) -> str | None:
+        normalized = (value or '').strip()
+        return normalized or None
+
+
+class SwosBetaProbeResponse(BaseModel):
+    success: bool
+    base_url: str
+    status_code: int
+    auth_mode: str
+    page_title: str | None = None
+    content_type: str | None = None
+    server: str | None = None
+    save_backup_visible: bool = False
+    backup_endpoint_ok: bool = False
+    note: str | None = None