Classify "Failed to write blobs" IDB errors as INVALID_DATA (never retry)

lib/storage/providers/IDBKeyValProvider/classifyError.ts

@@ -14,6 +14,13 @@ function classifyIDBError(error: unknown): ValueOf<typeof StorageErrorClass> {
         return StorageErrorClass.INVALID_DATA;
     }
 
+    // A queued File/Blob whose backing bytes are gone — the source OS file was modified, deleted, or
+    // renamed after being picked, so the structured clone fails at write time. Chromium reports it as
+    // InvalidBlob (Windows) or IOError (macOS). Retrying re-reads the same dead blob and can never succeed.
+    if (message.includes('failed to write blobs')) {
+        return StorageErrorClass.INVALID_DATA;
+    }
+
     // Browser quota exceeded.
     if (name.includes('quotaexceedederror') || message.includes('quotaexceedederror')) {
         return StorageErrorClass.CAPACITY;

tests/unit/storage/providers/classifyErrorTest.ts

@@ -0,0 +1,23 @@
+import classifyIDBError from '../../../../lib/storage/providers/IDBKeyValProvider/classifyError';
+import {StorageErrorClass} from '../../../../lib/storage/errors';
+
+describe('classifyIDBError', () => {
+    it.each([
+        // Dead File/Blob in the payload — the platform-specific dialects of "Failed to write blobs".
+        [new DOMException('Failed to write blobs (InvalidBlob)', 'DataError'), StorageErrorClass.INVALID_DATA],
+        [new DOMException('Failed to write blobs (IOError)', 'DataError'), StorageErrorClass.INVALID_DATA],
+        // Non-serializable payload.
+        [new TypeError("Failed to execute 'put' on 'IDBObjectStore': something could not be cloned."), StorageErrorClass.INVALID_DATA],
+        // Quota.
+        [new DOMException('The quota has been exceeded.', 'QuotaExceededError'), StorageErrorClass.CAPACITY],
+        // Backing-store corruption.
+        [new DOMException('Internal error opening backing store for indexedDB.open.', 'UnknownError'), StorageErrorClass.FATAL],
+        // Transient connection failures.
+        [new DOMException('Connection to Indexed Database server lost. Refresh the page to try again', 'UnknownError'), StorageErrorClass.TRANSIENT],
+        [new DOMException('IDB write transaction aborted without an error', 'AbortError'), StorageErrorClass.TRANSIENT],
+        // Anything else stays UNKNOWN.
+        [new Error('some brand new failure'), StorageErrorClass.UNKNOWN],
+    ])('classifies %s as %s', (error, expectedClass) => {
+        expect(classifyIDBError(error)).toBe(expectedClass);
+    });
+});