feat: add geolocation to download logs (country, city via ip-api.com)

backend/app/routes/download.py

@@ -63,18 +63,42 @@ def _client_ip(request: Request) -> str:
     return ""
 
 
+async def _geo_lookup(ip: str) -> tuple[str, str, str]:
+    """Return (country_code, country, city) via ip-api.com. Falls back to empty strings."""
+    if not ip or ip in ("127.0.0.1", "::1"):
+        return "", "", ""
+    try:
+        import httpx
+        async with httpx.AsyncClient(timeout=5) as client:
+            res = await client.get(
+                f"http://ip-api.com/json/{ip}",
+                params={"fields": "status,countryCode,country,city"},
+            )
+            data = res.json()
+            if data.get("status") == "success":
+                return data.get("countryCode", ""), data.get("country", ""), data.get("city", "")
+    except Exception as e:
+        logger.debug(f"Geo lookup failed for {ip}: {e}")
+    return "", "", ""
+
+
 async def _log_download(video_id: int, request: Request):
-    """Write a DownloadLog entry (fire-and-forget)."""
+    """Write a DownloadLog entry with geo info (fire-and-forget)."""
     try:
         ua = request.headers.get("user-agent", "")
         browser, device = _parse_ua(ua)
+        ip = _client_ip(request)
+        country_code, country, city = await _geo_lookup(ip)
         async with async_session() as db:
             db.add(DownloadLog(
                 video_id=video_id,
-                ip=_client_ip(request),
+                ip=ip,
                 user_agent=ua[:512],
                 browser=browser,
                 device=device,
+                country_code=country_code,
+                country=country,
+                city=city,
                 downloaded_at=datetime.utcnow(),
             ))
             await db.commit()