per-campaign settings, default campaign folders, custom prompt fix

backend/app/routers/diagnostics.py

@@ -1,4 +1,4 @@
-from fastapi import APIRouter
+from fastapi import APIRouter, Query
 
 from ..diagnostics import run_diagnostics
 
@@ -6,6 +6,6 @@ router = APIRouter(prefix="/api/diagnostics", tags=["diagnostics"])
 
 
 @router.get("")
-def get_diagnostics():
-    checks = run_diagnostics()
+def get_diagnostics(campaign_id: str = Query("default")):
+    checks = run_diagnostics(campaign_id)
     return {"ok": all(c["ok"] for c in checks), "checks": checks}