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/rpc-handlers.ts

@@ -5,6 +5,7 @@ import type { PanelContextMenu } from "./context-menu";
 import { readFileText, writeFileText, type EditManager } from "./edits";
 import { listLocalDrives } from "./fs/local";
 import type { SessionRegistry } from "./fs/registry";
+import type { LocalDirWatcher } from "./fs/watcher";
 import { SftpProvider } from "./fs/sftp";
 import type { ConnectionStore } from "./store/connections";
 import type { SettingsStore } from "./store/settings";
@@ -24,6 +25,7 @@ export interface AppDeps {
 	settings: SettingsStore;
 	edits: EditManager;
 	contextMenu: PanelContextMenu;
+	watcher: LocalDirWatcher;
 	/** Assigned after the rpc object exists (it needs rpc.send). */
 	events: {
 		sessionClosed: (info: { sessionId: string; reason: string }) => void;
@@ -121,6 +123,7 @@ export function createAppRPC({
 	settings,
 	edits,
 	contextMenu,
+	watcher,
 	events,
 }: AppDeps) {
 	return BrowserView.defineRPC<AppRPC>({
@@ -160,6 +163,12 @@ export function createAppRPC({
 						return { path: dir, entries: await fs.list(dir) };
 					}),
 
+				setWatchedDirs: ({ dirs }) =>
+					wrap(async () => {
+						watcher.setWatched(dirs);
+						return {};
+					}),
+
 				mkdir: ({ sessionId, path }) =>
 					wrap(async () => {
 						await registry.get(sessionId).mkdir(path);