feat(hub): drop files and folders onto Files to upload them

Into the folder on screen, under the Upload button's rule. A name already
there, or one the node would refuse, cancels the whole drop with a message.
Folders are recreated level by level; files go out a few at a time. The
in-flight upload guard is keyed by folder and name.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/packages/meshbay-hub/src/meshbay_hub/static/transport.js b/packages/meshbay-hub/src/meshbay_hub/static/transport.js
index 1f05b8d..77bf522 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/transport.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/transport.js
@@ -2329,15 +2329,17 @@ class MeshBayTransport {
   async uploadFile(file, { chunkSize, onProgress, signal, root, dir,
                           tr = '' } = {}) {
     // The same file twice at once would confuse the node, which keys its own
-    // upload state by name — and would race for the same destination. The guard
-    // is by name for that reason, even though the map below is keyed by id.
-    if (this._inFlightUploads.has(file.name)) {
+    // upload state by folder and name — and would race for the same
+    // destination. The guard uses the same key: by name alone, a dropped folder
+    // holding a `cover.jpg` in two albums failed the second one for nothing.
+    const inFlightKey = `${dir || ''}/${file.name}`;
+    if (this._inFlightUploads.has(inFlightKey)) {
       throw new Error(`${file.name} is already being uploaded`);
     }
     if (!this._gekRaw) throw new Error('This group has no key on this device');
     const C = window.MeshBayCrypto;
     const groupId = (this._connectArgs && this._connectArgs.groupId) || '';
-    this._inFlightUploads.add(file.name);
+    this._inFlightUploads.add(inFlightKey);
     const uploadId = _hex(crypto.getRandomValues(new Uint8Array(16)));
     const size = chunkSize || UPLOAD_CHUNK_SIZE;
     const total = Math.max(1, Math.ceil(file.size / size));
@@ -2487,7 +2489,7 @@ class MeshBayTransport {
       }
     } finally {
       this._uploaders.delete(uploadId);
-      this._inFlightUploads.delete(file.name);
+      this._inFlightUploads.delete(inFlightKey);
     }
     return stored || {};
   }