Phase 10: Telegram bot commands + Phase 11: Snackbar notifications

Phase 10 — Telegram Bot Commands:
- Add commands_config JSON field to TelegramBot model (enabled cmds,
  default count, response mode, rate limits, locale)
- Create command handler with 14 commands: /status, /albums, /events,
  /summary, /latest, /memory, /random, /search, /find, /person,
  /place, /favorites, /people, /help
- Add search_smart, search_metadata, search_by_person, get_random,
  download_asset, get_asset_thumbnail to ImmichClient
- Auto-register commands with Telegram setMyCommands API (EN+RU)
- Rate limiting per chat per command category
- Media mode: download thumbnails and send as photos to Telegram
- Webhook handler routes /commands before falling through to AI chat
- Frontend: expandable Commands section per bot with checkboxes,
  count/mode/locale settings, rate limit inputs, sync button

Phase 11 — Snackbar Notifications:
- Create snackbar store (snackbar.svelte.ts) with $state rune
- Create Snackbar component with fly/fade transitions, typed colors
- Mount globally in +layout.svelte
- Replace all alert() calls with typed snackbar notifications
- Add success snacks to all CRUD operations across all pages
- 4 types: success (3s), error (5s), info (3s), warning (4s)
- Max 3 visible, auto-dismiss, manual dismiss via X button

Both: Add ~30 i18n keys (EN+RU) for commands UI and snack messages.

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

plans/primary-plan.md

@@ -222,7 +222,14 @@ async def _execute_telegram_notification(self, ...):
 - Natural language tracker configuration via Telegram chat
 - **Subplan**: `plans/phase-6-claude-ai-bot.md`
 
-### Phase 11: Snackbar Notifications `[ ]`
+### Phase 10: Telegram Bot Commands `[x]`
+- Bot command handler for /status, /albums, /events, /search, /find, etc.
+- Commands config per bot (enabled commands, count, locale, rate limits)
+- Auto-register commands with Telegram BotFather API
+- Frontend UI for command configuration
+- **Subplan**: `plans/phase-10-telegram-commands.md`
+
+### Phase 11: Snackbar Notifications `[x]`
 - Unified toast/snackbar system for action feedback (success, error, info, warning)
 - Replace all `alert()` calls with typed snackbars
 - Auto-dismiss, stacking, accessible, animated