Add live logs to admin dashboard with level filtering and error middleware

backend/app/main.py

@@ -1,5 +1,9 @@
-from fastapi import FastAPI
+import logging
+import traceback
+
+from fastapi import FastAPI, Request
 from fastapi.middleware.cors import CORSMiddleware
+from fastapi.responses import JSONResponse
 
 from app.core.config import settings
 from app.api.endpoints import admin, auth, bandcamp, billing, lastfm, manual_import, playlist_fix, playlists, profile, recommendations, youtube_music
@@ -27,6 +31,21 @@ app.include_router(bandcamp.router, prefix="/api")
 app.include_router(profile.router, prefix="/api")
 
 
+logger = logging.getLogger("app")
+
+
+@app.middleware("http")
+async def log_errors(request: Request, call_next):
+    try:
+        response = await call_next(request)
+        if response.status_code >= 400:
+            logger.warning(f"{request.method} {request.url.path} -> {response.status_code}")
+        return response
+    except Exception as e:
+        logger.error(f"{request.method} {request.url.path} -> 500: {e}\n{traceback.format_exc()}")
+        return JSONResponse(status_code=500, content={"detail": "Internal server error"})
+
+
 @app.get("/api/health")
 async def health():
     return {"status": "ok", "app": "vynl"}