feat: geo location as Google Maps link in Telegram notifications

When signal has geo, show clickable Google Maps link instead of raw
coordinates. Without geo, show "Гео нету". Added parse_mode=HTML
to send_message for link rendering.

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

backend/main.py

@@ -223,9 +223,9 @@ async def signal(
 
     ts = datetime.fromtimestamp(body.timestamp / 1000, tz=timezone.utc)
     geo_info = (
-        f"📍 {lat}, {lon} (±{accuracy}м)"
+        f"📍 <a href=\"https://maps.google.com/maps?q={lat},{lon}\">{lat}, {lon}</a> (±{accuracy:.0f}м)"
         if geo
-        else "Без геолокации"
+        else "Гео нету"
     )
     text = (
         f"🚨 Сигнал от {user_name}\n"

backend/telegram.py

@@ -50,7 +50,7 @@ async def send_message(text: str) -> None:
     url = _TELEGRAM_API.format(token=config.BOT_TOKEN, method="sendMessage")
     async with httpx.AsyncClient(timeout=10) as client:
         for attempt in range(3):
-            resp = await client.post(url, json={"chat_id": config.CHAT_ID, "text": text})
+            resp = await client.post(url, json={"chat_id": config.CHAT_ID, "text": text, "parse_mode": "HTML"})
             if resp.status_code == 429:
                 retry_after = resp.json().get("parameters", {}).get("retry_after", 30)
                 sleep = retry_after * (attempt + 1)