Auto-refresh the active tab's panels (silent, non-disturbing)

Local panels are fs.watched (LocalDirWatcher + setWatchedDirs -> pathRefresh);
remote panels poll every 3s. New refresh({silent}) skips the loading/busy
flags and touches no DOM, snapshotting sessionId+cwd to discard results if the
user navigated mid-flight. Only the active tab is live; switching tabs
refreshes the new pair. A future on/off setting is left as commented
breadcrumbs. Docs updated.

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

src/bun/index.ts

@@ -6,6 +6,7 @@ import { PanelContextMenu } from "./context-menu";
 import { EditManager } from "./edits";
 import { EditorWindows } from "./editor-windows";
 import { SessionRegistry } from "./fs/registry";
+import { LocalDirWatcher } from "./fs/watcher";
 import { ManagerWindow } from "./manager-window";
 import { applyApplicationMenu } from "./menu";
 import { createAppRPC } from "./rpc-handlers";
@@ -45,6 +46,7 @@ const store = new ConnectionStore();
 const settings = new SettingsStore();
 const edits = new EditManager(registry, engine, settings);
 const contextMenu = new PanelContextMenu();
+const watcher = new LocalDirWatcher();
 const events = {
 	sessionClosed: (_info: { sessionId: string; reason: string }) => {},
 	connectionsChanged: () => {},
@@ -53,7 +55,9 @@ const events = {
 	openConnectionManager: () => {},
 	showAbout: () => {},
 };
-const rpc = createAppRPC({ registry, engine, store, settings, edits, contextMenu, events });
+const rpc = createAppRPC({ registry, engine, store, settings, edits, contextMenu, watcher, events });
+// late-bound like events: a watched local dir changed -> tell the main webview
+watcher.onChange = (dir) => rpc.send.pathRefresh({ sessionId: "local", dir });
 const url = await getMainViewUrl();
 
 // Loaded before any window exists: the persisted theme is baked into every