fix: drop spurious **kwargs on tab_logs (FastAPI parsed it as required query)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

web/app.py

@@ -661,7 +661,7 @@ def _collect_events(start_iso: str | None, end_iso: str | None) -> list[dict]:
 
 
 @app.get("/logs", response_class=HTMLResponse)
-def tab_logs(request: Request, **kwargs):
+def tab_logs(request: Request):
     u = current_user(request)
     if not u:
         return RedirectResponse("/login", status_code=303)