fix(ui): upload chunk size, cached file display, chat names, file delete, inline thumbnails

- Upload chunks capped at 64KB to avoid WebRTC DataChannel max-message-size
- Show cached files immediately while WebRTC connects (tabs visible during connection)
- Persist sender_name in chat store (SQLite) — no more UUID display in history
- File delete action in menu (node admin only, enforced server-side)
- FILE_DELETE / FILE_DELETE_ACK MNP message types
- Inline image thumbnails in chat attachments (download+decrypt, Signal-style)
- Member panel: "Owner" label instead of "Group admin" to avoid hub/group admin confusion
- Create group page: hint about needing a node
- Refresh index after chat file attachment upload

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 33 insertions, 1 deletions

diff --git a/packages/meshbay-node/src/meshbay_node/transport/webrtc_server.py b/packages/meshbay-node/src/meshbay_node/transport/webrtc_server.py
index 6231310..15c8f66 100644
--- a/packages/meshbay-node/src/meshbay_node/transport/webrtc_server.py
+++ b/packages/meshbay-node/src/meshbay_node/transport/webrtc_server.py
@@ -116,6 +116,8 @@ class WebRTCPeerSession:
                 self._do_chat_history(msg)
             elif mtype == MNP.FILE_UPLOAD:
                 self._do_file_upload(msg)
+            elif mtype == MNP.FILE_DELETE:
+                self._do_file_delete(msg)
             else:
                 log.warning("Unknown MNP message type on DataChannel: %s", mtype)
         except Exception as e:
@@ -276,6 +278,7 @@ class WebRTCPeerSession:
                 iteration=msg.get("iteration", 0),
                 payload=raw,
                 thread_id=msg.get("thread_id"),
+                sender_name=sender_name,
             ))
 
         peers = self._ctx.get("_peers", {})
@@ -321,7 +324,7 @@ class WebRTCPeerSession:
                 {
                     "id": m.id,
                     "sender_id": m.sender_id,
-                    "sender_name": names.get(m.sender_id, ""),
+                    "sender_name": m.sender_name or names.get(m.sender_id, ""),
                     "payload": m.payload.decode("utf-8", errors="replace")
                     if isinstance(m.payload, bytes) else m.payload,
                     "timestamp": m.timestamp,
@@ -373,6 +376,35 @@ class WebRTCPeerSession:
             tmp_path.rename(final_path)
             log.info("Upload complete: %s (%d chunks)", safe_name, total_chunks)
 
+    def _do_file_delete(self, msg: dict) -> None:
+        ctx = self._group_ctx()
+        file_id = msg.get("file_id", "")
+        if not file_id:
+            self._send({"type": "error", "detail": "Missing file_id"})
+            return
+
+        node_user_id = self._ctx.get("node_user_id")
+        if node_user_id and self._user_id != node_user_id:
+            self._send({"type": "error", "detail": "Only node admin can delete files"})
+            return
+
+        entry = ctx["index"].get_entry(file_id)
+        if not entry:
+            self._send({"type": "error", "detail": "File not found"})
+            return
+
+        file_path = ctx["shared_root"] / entry.path / entry.name
+        if file_path.exists():
+            file_path.unlink()
+            log.info("File deleted: %s", entry.name)
+
+        ctx["index"].remove_entry(file_id)
+        self._send({
+            "type": MNP.FILE_DELETE_ACK,
+            "v": MNP_VERSION,
+            "file_id": file_id,
+        })
+
     def _send(self, obj: dict) -> None:
         if self._channel and self._channel.readyState == "open":
             self._channel.send(_pack(obj))