Phase 8: Server health, album filter, Jinja2 engine, password change

5 features implemented:

1. Server health indicator: green/red/yellow dot on each server card.
   Pings Immich in background on page load. New GET /api/servers/{id}/ping.

2. Album selector filter: search input above album list in tracker form.
   Filters by name as you type (case-insensitive). Shows total count.

3. Album last update time: each album in the selector shows its
   updatedAt date. Backend now returns updatedAt from Immich API.

4. Full Jinja2 template engine in notifier:
   - build_full_context() assembles all ~40 variables from blueprint
   - Common date/location detection across assets
   - Per-asset date/location when they differ
   - Favorite indicator, people formatting, asset list with truncation
   - Video warning for Telegram
   - All template slots from TemplateConfig used contextually

5. Password change: PUT /api/auth/password endpoint (validates current
   password, min 6 chars). UI in sidebar footer with inline form.

Also: Phase 9 plan (Telegram bot management) added.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/lib/i18n/ru.json

@@ -244,6 +244,10 @@
 		"dark": "Тёмная",
 		"system": "Системная",
 		"test": "Тест",
-		"create": "Создать"
+		"create": "Создать",
+		"changePassword": "Сменить пароль",
+		"currentPassword": "Текущий пароль",
+		"newPassword": "Новый пароль",
+		"passwordChanged": "Пароль успешно изменён"
 	}
 }