feat: UX & notification improvements — icons, events, chat names, link validation, templates

- Show entity icons on all cards with fallback defaults (providers, trackers, targets, bots)
- Enrich EventLog with provider_name, tracker_name, assets_count; add DB migration
- Dashboard events: filtering (type, provider, search), sorting, pagination, dynamic page size
- Friendly chat names on telegram target cards (resolve from TelegramChat table)
- Test message button on bot chat items with locale-aware messages
- Album public link validation on tracker save with auto-create dialog
- Support albums without public links: conditional <a href> in templates
- Fetch shared links during poll, enrich events with public_url/protected_url
- Per-asset public_url in template context ({share_url}/photos/{asset_id})
- Common date/location detection: common_date + common_location context vars
- Dual date formats: date_format (datetime) + date_only_format (date only)
- Template clone button, HTML link rendering in template preview
- Fix Telegram asset download 401: pass x-api-key headers through client
- Fix provider external_url matching for API key scoping
- Fix event timestamp timezone (append Z suffix for UTC)
- Localize event filter controls, test messages (EN/RU)
- Template variable UI helpers updated with all new fields
- CLAUDE.md: template system sync rules documentation

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

packages/server/src/notify_bridge_server/api/telegram_bots.py

@@ -1,6 +1,6 @@
 """Telegram bot management API routes."""
 
-from fastapi import APIRouter, Depends, HTTPException, status
+from fastapi import APIRouter, Depends, HTTPException, Query, status
 from pydantic import BaseModel
 from sqlmodel import select
 from sqlmodel.ext.asyncio.session import AsyncSession
@@ -23,7 +23,7 @@ class BotCreate(BaseModel):
 
 class BotUpdate(BaseModel):
     name: str | None = None
-    commands_config: dict | None = None
+    icon: str | None = None
 
 
 @router.get("")
@@ -69,12 +69,12 @@ async def update_bot(
     user: User = Depends(get_current_user),
     session: AsyncSession = Depends(get_session),
 ):
-    """Update a bot's display name and/or commands config."""
+    """Update a bot's display name and icon."""
     bot = await _get_user_bot(session, bot_id, user.id)
     if body.name is not None:
         bot.name = body.name
-    if body.commands_config is not None:
-        bot.commands_config = body.commands_config
+    if body.icon is not None:
+        bot.icon = body.icon
     session.add(bot)
     await session.commit()
     await session.refresh(bot)
@@ -173,6 +173,37 @@ async def discover_chats(
     return [_chat_response(c) for c in result.all()]
 
 
+@router.post("/{bot_id}/chats/{chat_id}/test")
+async def test_chat(
+    bot_id: int,
+    chat_id: str,
+    locale: str = Query("en"),
+    user: User = Depends(get_current_user),
+    session: AsyncSession = Depends(get_session),
+):
+    """Send a test message to a chat via the bot."""
+    from ..services.notifier import _get_test_message
+
+    bot = await _get_user_bot(session, bot_id, user.id)
+    message = _get_test_message(locale, "telegram")
+    try:
+        async with aiohttp.ClientSession() as http:
+            async with http.post(
+                f"{TELEGRAM_API_BASE_URL}{bot.token}/sendMessage",
+                json={
+                    "chat_id": chat_id,
+                    "text": message,
+                    "parse_mode": "HTML",
+                },
+            ) as resp:
+                data = await resp.json()
+                if data.get("ok"):
+                    return {"success": True}
+                return {"success": False, "error": data.get("description", "Unknown error")}
+    except aiohttp.ClientError as e:
+        return {"success": False, "error": str(e)}
+
+
 @router.delete("/{bot_id}/chats/{chat_db_id}", status_code=status.HTTP_204_NO_CONTENT)
 async def delete_chat(
     bot_id: int,
@@ -247,10 +278,10 @@ def _bot_response(b: TelegramBot) -> dict:
     return {
         "id": b.id,
         "name": b.name,
+        "icon": b.icon,
         "bot_username": b.bot_username,
         "bot_id": b.bot_id,
         "token_preview": f"{b.token[:8]}...{b.token[-4:]}" if len(b.token) > 12 else "***",
-        "commands_config": b.commands_config,
         "created_at": b.created_at.isoformat(),
     }