Add Tauri compatibility fallback and switch to localStorage for web environments

- Updated `useApi` to detect Tauri runtime and dynamically import Tauri-specific modules.
- Refactored `useStore` to use `localStorage` fallback when not in Tauri.
- Improved runtime checks with `isTauri` utility to handle platform-specific logic.

src/composables/useApi.ts

@@ -1,4 +1,3 @@
-import { fetch } from '@tauri-apps/plugin-http';
 import { useStore } from './useStore.ts';
 import { useCrypto } from './useCrypto.ts';
 
@@ -9,6 +8,9 @@ type Settings = {
   password: string;
 };
 
+const isTauri = () =>
+  typeof window !== 'undefined' && Boolean((window as typeof window & { __TAURI__?: unknown }).__TAURI__);
+
 async function buildAuthHeader(): Promise<string | undefined> {
   const {decrypt} = useCrypto();
   const { getValue } = useStore();
@@ -36,7 +38,12 @@ export function useApi() {
       ...options.headers,
     } as Record<string, string>;
 
-    const response = await fetch(url, {
+    const response = isTauri()
+      ? await (await import('@tauri-apps/plugin-http')).fetch(url, {
+          ...options,
+          headers,
+        })
+      : await fetch(url, {
           ...options,
           headers,
         });

src/composables/useStore.ts

@@ -1,8 +1,13 @@
-import { load, type Store } from '@tauri-apps/plugin-store';
+import type { Store } from '@tauri-apps/plugin-store';
+
 let storePromise: Promise<Store> | null = null;
 
-function getStore(): Promise<Store> {
+const isTauri = () =>
+  typeof window !== 'undefined' && Boolean((window as typeof window & { __TAURI__?: unknown }).__TAURI__);
+
+async function getStore(): Promise<Store> {
   if (!storePromise) {
+    const { load } = await import('@tauri-apps/plugin-store');
     storePromise = load('store.json', {
       autoSave: false,
       defaults: {},
@@ -14,15 +19,28 @@ function getStore(): Promise<Store> {
 export function useStore() {
   const setValue = async <T>(key: string, value: T) => {
     console.log('setValue',key,value);
+    if (isTauri()) {
       const store = await getStore();
       await store.set(key, value);
       await store.save();
+      return;
+    }
+    localStorage.setItem(key, JSON.stringify(value));
   };
 
   const getValue = async <T>(key: string) => {
     console.log('getValue',key);
+    if (isTauri()) {
       const store = await getStore();
       return store.get<T>(key);
+    }
+    const rawValue = localStorage.getItem(key);
+    if (rawValue === null) return null;
+    try {
+      return JSON.parse(rawValue) as T;
+    } catch {
+      return null;
+    }
   };
 
   return {