Ship Composio as a built-in integration and trim Settings

- Resolve the API key from cred.txt at the project root in development
  and the packaged resources directory in production; the file is the
  source of truth, so a rotated key replaces the stored one. Fixes the
  401 packaged builds hit when a stale database key won.
- Remove the user-facing Composio key editor; the key ships with the
  product and is not configurable.
- Remove the Migration console from Settings.
- Remove the Connectors and Home refresh buttons; connector statuses
  sync when the page opens.

src/main/app/ipc-handlers.ts

@@ -321,7 +321,7 @@ export function registerIpcHandlers(deps: IpcDeps): void {
     }
   });
 
-  const composioConnections = new ComposioConnectionService(deps.connection.db, process.cwd());
+  const composioConnections = new ComposioConnectionService(deps.connection.db);
   const connectorGrants = new ConnectorGrantsService(deps.connection.db);
 
   ipcMain.handle(IPC_CHANNELS.listComposioToolkits, async (_event, input) => {
@@ -362,19 +362,6 @@ export function registerIpcHandlers(deps: IpcDeps): void {
     toolkitSlug: input.toolkitSlug,
   })));
 
-  ipcMain.handle(IPC_CHANNELS.saveComposioSettings, (_event, input) => mutate(() => {
-    const now = new Date().toISOString();
-    const db = deps.connection.db;
-    const upsert = db.prepare(`
-      insert into composio_settings(org_id, key, value, updated_at) values (?, ?, ?, ?)
-      on conflict(org_id, key) do update set value = excluded.value, updated_at = excluded.updated_at
-    `);
-    upsert.run(input.orgId, "api_key", input.apiKey, now);
-    upsert.run(input.orgId, "toolkits", JSON.stringify(input.toolkits), now);
-    upsert.run(input.orgId, "entity_id", input.orgId, now);
-    return null;
-  }));
-
   ipcMain.handle(IPC_CHANNELS.windowMinimize, () => deps.mainWindow.minimize());
   ipcMain.handle(IPC_CHANNELS.windowMaximize, () => deps.mainWindow.isMaximized() ? deps.mainWindow.unmaximize() : deps.mainWindow.maximize());
   ipcMain.handle(IPC_CHANNELS.windowClose, () => deps.mainWindow.close());