Add weather sync job, API endpoints and settings UI

Fetches daily ERA5 weather from Open-Meteo (no API key).
Configurable location, timezone and sync time via Settings.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/api/config.py

@@ -1145,6 +1145,79 @@ async def delete_key(
 # AI INSIGHTS SETTINGS
 # ============================================
 
+class WeatherSettingsResponse(BaseModel):
+    enabled: bool = True
+    location_name: str = "Stow on the Wold, GL54 1JX"
+    latitude: float = 51.9253
+    longitude: float = -1.7272
+    timezone: str = "Europe/London"
+    sync_time: str = "05:15"
+
+
+class WeatherSettingsUpdate(BaseModel):
+    enabled: Optional[bool] = None
+    location_name: Optional[str] = None
+    latitude: Optional[float] = None
+    longitude: Optional[float] = None
+    timezone: Optional[str] = None
+    sync_time: Optional[str] = None
+
+
+@router.get("/settings/weather", response_model=WeatherSettingsResponse)
+async def get_weather_settings(
+    db: AsyncSession = Depends(get_db),
+    current_user: dict = Depends(get_current_user)
+):
+    """Get weather sync configuration."""
+    result = await db.execute(
+        text("SELECT config_key, config_value FROM system_config WHERE config_key LIKE 'weather_%'")
+    )
+    cfg = {row.config_key: row.config_value for row in result.fetchall()}
+    return WeatherSettingsResponse(
+        enabled=cfg.get("weather_sync_enabled", "true").lower() in ("true", "1", "yes"),
+        location_name=cfg.get("weather_location_name", "Stow on the Wold, GL54 1JX"),
+        latitude=float(cfg.get("weather_latitude", "51.9253")),
+        longitude=float(cfg.get("weather_longitude", "-1.7272")),
+        timezone=cfg.get("weather_timezone", "Europe/London"),
+        sync_time=cfg.get("weather_sync_time", "05:15"),
+    )
+
+
+@router.post("/settings/weather")
+async def update_weather_settings(
+    settings: WeatherSettingsUpdate,
+    db: AsyncSession = Depends(get_db),
+    current_user: dict = Depends(get_current_user)
+):
+    """Update weather sync configuration."""
+    updates = {}
+    if settings.enabled is not None:
+        updates["weather_sync_enabled"] = "true" if settings.enabled else "false"
+    if settings.location_name is not None:
+        updates["weather_location_name"] = settings.location_name
+    if settings.latitude is not None:
+        updates["weather_latitude"] = str(settings.latitude)
+    if settings.longitude is not None:
+        updates["weather_longitude"] = str(settings.longitude)
+    if settings.timezone is not None:
+        updates["weather_timezone"] = settings.timezone
+    if settings.sync_time is not None:
+        updates["weather_sync_time"] = settings.sync_time
+
+    for key, value in updates.items():
+        await db.execute(
+            text("""
+                INSERT INTO system_config (config_key, config_value, updated_at)
+                VALUES (:key, :value, NOW())
+                ON CONFLICT (config_key) DO UPDATE
+                SET config_value = :value, updated_at = NOW()
+            """),
+            {"key": key, "value": value}
+        )
+    await db.commit()
+    return {"status": "saved", "keys_updated": list(updates.keys())}
+
+
 class AIInsightsSettingsResponse(BaseModel):
     enabled: bool = False
     api_key_set: bool = False