feat(settings): add device-specific settings storage

Implement per-device settings sync via mana-core-auth. Settings are now
stored both locally (localStorage) and in the cloud, with each device
(desktop, mobile, tablet) maintaining its own configuration.

Changes:
- Add deviceSettings JSONB column to user_settings table
- Add device API endpoints (GET/PATCH/DELETE /settings/device/:id/:app)
- Extend user-settings-store with device ID generation and detection
- Integrate calendar settings with cloud sync per device
- Remove todos from calendar header row (sidebar + grid only)
- Add hours dropdown to CalendarHeader for time range configuration

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

services/mana-core-auth/src/settings/settings.controller.ts

@@ -3,7 +3,7 @@ import { SettingsService } from './settings.service';
 import { JwtAuthGuard } from '../common/guards/jwt-auth.guard';
 import { CurrentUser } from '../common/decorators/current-user.decorator';
 import type { CurrentUserData } from '../common/decorators/current-user.decorator';
-import { UpdateGlobalSettingsDto } from './dto';
+import { UpdateGlobalSettingsDto, UpdateDeviceAppSettingsDto } from './dto';
 import type { UpdateAppOverrideDto } from './dto';
 
 @Controller('settings')
@@ -13,7 +13,7 @@ export class SettingsController {
 
 	/**
 	 * GET /api/v1/settings
-	 * Get all user settings (global + app overrides)
+	 * Get all user settings (global + app overrides + device settings)
 	 */
 	@Get()
 	async getSettings(@CurrentUser() user: CurrentUserData) {
@@ -69,4 +69,95 @@ export class SettingsController {
 			...settings,
 		};
 	}
+
+	// ============================================================================
+	// Device Settings Endpoints
+	// ============================================================================
+
+	/**
+	 * GET /api/v1/settings/devices
+	 * List all devices for the current user
+	 */
+	@Get('devices')
+	async getDevices(@CurrentUser() user: CurrentUserData) {
+		const result = await this.settingsService.getDevices(user.userId);
+		return {
+			success: true,
+			...result,
+		};
+	}
+
+	/**
+	 * GET /api/v1/settings/device/:deviceId/:appId
+	 * Get settings for a specific device and app
+	 */
+	@Get('device/:deviceId/:appId')
+	async getDeviceAppSettings(
+		@CurrentUser() user: CurrentUserData,
+		@Param('deviceId') deviceId: string,
+		@Param('appId') appId: string
+	) {
+		const settings = await this.settingsService.getDeviceAppSettings(user.userId, deviceId, appId);
+		return {
+			success: true,
+			settings,
+		};
+	}
+
+	/**
+	 * PATCH /api/v1/settings/device/:deviceId/:appId
+	 * Update settings for a specific device and app
+	 */
+	@Patch('device/:deviceId/:appId')
+	async updateDeviceAppSettings(
+		@CurrentUser() user: CurrentUserData,
+		@Param('deviceId') deviceId: string,
+		@Param('appId') appId: string,
+		@Body() dto: UpdateDeviceAppSettingsDto
+	) {
+		const settings = await this.settingsService.updateDeviceAppSettings(
+			user.userId,
+			deviceId,
+			appId,
+			dto
+		);
+		return {
+			success: true,
+			...settings,
+		};
+	}
+
+	/**
+	 * DELETE /api/v1/settings/device/:deviceId
+	 * Remove a device entirely
+	 */
+	@Delete('device/:deviceId')
+	async removeDevice(@CurrentUser() user: CurrentUserData, @Param('deviceId') deviceId: string) {
+		const settings = await this.settingsService.removeDevice(user.userId, deviceId);
+		return {
+			success: true,
+			...settings,
+		};
+	}
+
+	/**
+	 * DELETE /api/v1/settings/device/:deviceId/:appId
+	 * Remove app settings from a specific device
+	 */
+	@Delete('device/:deviceId/:appId')
+	async removeDeviceAppSettings(
+		@CurrentUser() user: CurrentUserData,
+		@Param('deviceId') deviceId: string,
+		@Param('appId') appId: string
+	) {
+		const settings = await this.settingsService.removeDeviceAppSettings(
+			user.userId,
+			deviceId,
+			appId
+		);
+		return {
+			success: true,
+			...settings,
+		};
+	}
 }