chore: add qrcut dual-write diagnostics

hf_dashboard.py

@@ -215,11 +215,12 @@ def _png_bytes(image: Image.Image, *, max_size: int | None = None) -> bytes:
 
 
 def _upload_public_png(*, image: Image.Image, object_path: str, max_size: int | None = None) -> str:
+    png_bytes = _png_bytes(image, max_size=max_size)
     _ensure_bucket()
     _request_bytes(
         "POST",
         f"/storage/v1/object/{GENERATIONS_BUCKET}/{urllib_parse.quote(object_path, safe='/')}",
-        data=_png_bytes(image, max_size=max_size),
+        data=png_bytes,
         content_type="image/png",
         headers={"x-upsert": "true"},
     )
@@ -230,10 +231,14 @@ def _upload_public_png(*, image: Image.Image, object_path: str, max_size: int |
     # Failures here are logged but do NOT break the Supabase write -- Supabase
     # remains the source of truth until the user explicitly deletes the bucket.
     if QRCUT_STORAGE_URL and QRCUT_WRITE_API_KEY:
+        print(
+            f"[qrcut] dual-write enabled path={object_path} bytes={len(png_bytes)} target={QRCUT_STORAGE_URL}/storage-write/...",
+            flush=True,
+        )
         try:
             kvm_req = urllib_request.Request(
                 f"{QRCUT_STORAGE_URL}/storage-write/{urllib_parse.quote(object_path, safe='/')}",
-                data=_png_bytes(image, max_size=max_size),
+                data=png_bytes,
                 headers={
                     "X-QRCUT-WRITE-KEY": QRCUT_WRITE_API_KEY,
                     "Content-Type": "image/png",
@@ -244,10 +249,20 @@ def _upload_public_png(*, image: Image.Image, object_path: str, max_size: int |
             with urllib_request.urlopen(kvm_req, timeout=30) as kvm_resp:
                 if kvm_resp.status == 201:
                     public_url = f"{QRCUT_STORAGE_PUBLIC_URL}/storage/{object_path}"
+                    print(f"[qrcut] dual-write success HTTP 201: {object_path}", flush=True)
                 else:
-                    print(f"[qrcut] dual-write HTTP {kvm_resp.status}: {object_path}", flush=True)
+                    response_body = kvm_resp.read(400).decode("utf-8", errors="replace").strip()
+                    print(
+                        f"[qrcut] dual-write HTTP {kvm_resp.status}: {object_path} body={response_body}",
+                        flush=True,
+                    )
         except (urllib_error.URLError, TimeoutError, OSError) as exc:
             print(f"[qrcut] dual-write failed: {exc} -- {object_path}", flush=True)
+    else:
+        print(
+            f"[qrcut] dual-write skipped missing env: storage_url={'yes' if QRCUT_STORAGE_URL else 'no'} write_key={'yes' if QRCUT_WRITE_API_KEY else 'no'} path={object_path}",
+            flush=True,
+        )
 
     return public_url