feat(open-webui): voice messages, fix camera capture and full notes

- Voice messages: record from the microphone and transcribe to the input
  via Open WebUI's /api/v1/audio/transcriptions (mic button in composer).
- Camera capture: attach the stream via a ref callback so the preview is
  no longer a black frame (the ref could be read before the video mounted).
- Notes: fetch the full note body on attach. The list endpoint truncates
  content to 1000 chars, so attached notes were cut off; getNote returns
  the complete markdown.

packages/request-handler/src/open-webui.ts

@@ -77,6 +77,19 @@ export const openWebUiNotesRequestHandler = createCachedIntegrationRequestHandle
   queryKey: "openWebUiNotes",
 });
 
+export const openWebUiNoteRequestHandler = createCachedIntegrationRequestHandler<
+  OpenWebUiNote,
+  "openWebUi",
+  { noteId: string }
+>({
+  async requestAsync(integration, input) {
+    const integrationInstance = await createIntegrationAsync(integration);
+    return await integrationInstance.getNoteAsync(input.noteId);
+  },
+  cacheDuration: dayjs.duration(30, "seconds"),
+  queryKey: "openWebUiNote",
+});
+
 export const openWebUiChatsRequestHandler = createCachedIntegrationRequestHandler<
   OpenWebUiChatListItem[],
   "openWebUi",