fix(cli): handle incomplete localStorage in Node.js v25+

Node.js v25 provides a built-in localStorage on globalThis, but without
`--localstorage-file` it is an empty object lacking getItem/setItem.
The existing check `!("localStorage" in globalThis)` passes, so the
polyfill is skipped and the CLI crashes with:

  TypeError: localStorage.getItem is not a function

Check for getItem as well so the polyfill is applied when the native
implementation is incomplete.

src/apps/cli/main.ts

@@ -3,7 +3,7 @@
  * Command-line version of Self-hosted LiveSync plugin for syncing vaults without Obsidian
  */
 
-if (!("localStorage" in globalThis)) {
+if (!("localStorage" in globalThis) || typeof (globalThis as any).localStorage?.getItem !== "function") {
     const store = new Map<string, string>();
     (globalThis as any).localStorage = {
         getItem: (key: string) => (store.has(key) ? store.get(key)! : null),