cli: implement local→CouchDB file watching via chokidar

- Add chokidar ^4.0.0 as dependency (root package.json, runtime-package.json)
- Mark chokidar as external in vite.config.ts (not bundled, loaded at runtime)
- Implement CLIWatchAdapter.beginWatch() with chokidar:
  - ignoreInitial: true (startup files handled by mirror scan)
  - awaitWriteFinish to prevent partial-write events
  - Excludes dotfiles and .livesync/ directory at watcher level
  - Maps add/change/unlink/addDir/unlinkDir to IStorageEventWatchHandlers
  - Fatal error handler: logs clearly and releases watcher resources
- Add close() to CLIWatchAdapter, StorageEventManagerCLI for clean shutdown
- Register onUnload hook in CLIServiceModules to close watcher on shutdown

src/apps/cli/managers/CLIStorageEventManagerAdapter.unit.spec.ts

@@ -0,0 +1,126 @@
+import { describe, expect, it, vi, beforeEach } from "vitest";
+import type { IStorageEventWatchHandlers } from "@lib/managers/adapters";
+import type { NodeFile } from "../adapters/NodeTypes";
+
+// ── chokidar mock ──────────────────────────────────────────────────────────────
+// Must be hoisted before imports that pull in chokidar.
+
+const mockWatcher = {
+    on: vi.fn().mockReturnThis(),
+    once: vi.fn((event: string, cb: () => void) => {
+        if (event === "ready") cb();
+        return mockWatcher;
+    }),
+    close: vi.fn(() => Promise.resolve()),
+};
+
+vi.mock("chokidar", () => ({
+    watch: vi.fn(() => mockWatcher),
+}));
+
+import * as chokidar from "chokidar";
+import { CLIStorageEventManagerAdapter } from "./CLIStorageEventManagerAdapter";
+
+// ── helpers ───────────────────────────────────────────────────────────────────
+
+function makeHandlers(): IStorageEventWatchHandlers {
+    return {
+        onCreate: vi.fn(),
+        onChange: vi.fn(),
+        onDelete: vi.fn(),
+        onRename: vi.fn(),
+    } as any;
+}
+
+// ── tests ─────────────────────────────────────────────────────────────────────
+
+describe("CLIStorageEventManagerAdapter", () => {
+    beforeEach(() => {
+        vi.clearAllMocks();
+        // Restore the default once() behaviour (ready fires synchronously).
+        mockWatcher.once.mockImplementation((event: string, cb: () => void) => {
+            if (event === "ready") cb();
+            return mockWatcher;
+        });
+    });
+
+    it("beginWatch is no-op when watchEnabled=false", async () => {
+        const adapter = new CLIStorageEventManagerAdapter("/base", undefined, false);
+        const handlers = makeHandlers();
+
+        await adapter.watch.beginWatch(handlers);
+
+        expect(chokidar.watch).not.toHaveBeenCalled();
+    });
+
+    it("beginWatch calls chokidar.watch when watchEnabled=true", async () => {
+        const adapter = new CLIStorageEventManagerAdapter("/base", undefined, true);
+        const handlers = makeHandlers();
+
+        await adapter.watch.beginWatch(handlers);
+
+        expect(chokidar.watch).toHaveBeenCalledTimes(1);
+        expect(chokidar.watch).toHaveBeenCalledWith(
+            "/base",
+            expect.objectContaining({ ignoreInitial: true })
+        );
+    });
+
+    it("add event produces NodeFile with correct relative path via onCreate", async () => {
+        const basePath = "/vault/base";
+        const adapter = new CLIStorageEventManagerAdapter(basePath, undefined, true);
+        const handlers = makeHandlers();
+
+        await adapter.watch.beginWatch(handlers);
+
+        // Find the callback registered for the "add" event.
+        const addCall = mockWatcher.on.mock.calls.find(([event]) => event === "add");
+        expect(addCall).toBeDefined();
+        const addCallback = addCall![1] as (filePath: string, stats: any) => void;
+
+        const fakeStats = { ctimeMs: 1000, mtimeMs: 2000, size: 42 };
+        addCallback(`${basePath}/subdir/note.md`, fakeStats);
+
+        expect(handlers.onCreate).toHaveBeenCalledTimes(1);
+        const created = (handlers.onCreate as ReturnType<typeof vi.fn>).mock.calls[0][0] as NodeFile;
+        expect(created.path).toBe("subdir/note.md");
+        expect(created.stat?.size).toBe(42);
+    });
+
+    it("close() calls watcher.close()", async () => {
+        const adapter = new CLIStorageEventManagerAdapter("/base", undefined, true);
+        const handlers = makeHandlers();
+
+        await adapter.watch.beginWatch(handlers);
+        await adapter.close();
+
+        expect(mockWatcher.close).toHaveBeenCalledTimes(1);
+    });
+
+    it("close() is safe when no watcher was started", async () => {
+        const adapter = new CLIStorageEventManagerAdapter("/base", undefined, false);
+
+        // Should not throw.
+        await expect(adapter.close()).resolves.toBeUndefined();
+        expect(mockWatcher.close).not.toHaveBeenCalled();
+    });
+
+    it("error event triggers process.exit(1)", async () => {
+        const adapter = new CLIStorageEventManagerAdapter("/base", undefined, true);
+        const handlers = makeHandlers();
+
+        await adapter.watch.beginWatch(handlers);
+
+        const processExitSpy = vi.spyOn(process, "exit").mockImplementation((() => {}) as any);
+
+        const errorCall = mockWatcher.on.mock.calls.find(([event]) => event === "error");
+        expect(errorCall).toBeDefined();
+        const errorCallback = errorCall![1] as (err: Error) => void;
+
+        errorCallback(new Error("disk failure"));
+
+        expect(processExitSpy).toHaveBeenCalledWith(1);
+
+        processExitSpy.mockRestore();
+    });
+});