桌面下载端改用共享核心包，并修两处已知缺陷

- store 改由 createGalleryStore 生成：totalGalleryTask 成为唯一任务源，
  收藏/下载/分类/搜索结果全部由 getter 派生，不再维护三份互相引用的数组
- 排序不再原地修改分类数组；本地搜索记住关键词，任务刷新后结果仍在
- 本地搜索结果补齐翻页入口：此前匹配 25 项却只显示 10 项，其余无法看到
- 取消收藏不再因本地找不到 gid 抛 TypeError
- 删除重复的 taskSocket/progressiveImages/validate/thumbnail，改从共享包导入
- 远端搜索改用共享 fetchGalleries，关键词交给 axios 序列化，翻页按游标转发
- main.js 按需注册 Element Plus，入口 JS 由约 1.14MB 降到约 494KB
- 依赖新增 file:../lionwebsite-frontend-shared

测试：14 项通过；构建成功，入口仍为 /asserts/index/index.js|css。

package-lock.json

@@ -10,6 +10,7 @@
       "dependencies": {
         "axios": "^1.0.0",
         "element-plus": "^2.2.0",
+        "lionwebsite-frontend-shared": "file:../lionwebsite-frontend-shared",
         "qs": "^6.11.0",
         "vue": "^3.0.4",
         "vuex": "^4.0.2"
@@ -19,6 +20,9 @@
         "vite": "8.3.0"
       }
     },
+    "../lionwebsite-frontend-shared": {
+      "version": "1.0.0"
+    },
     "node_modules/@babel/helper-string-parser": {
       "version": "7.29.7",
       "resolved": "https://registry.npmjs.org/@babel/helper-string-parser/-/helper-string-parser-7.29.7.tgz",
@@ -1272,6 +1276,10 @@
         "url": "https://opencollective.com/parcel"
       }
     },
+    "node_modules/lionwebsite-frontend-shared": {
+      "resolved": "../lionwebsite-frontend-shared",
+      "link": true
+    },
     "node_modules/lodash": {
       "version": "4.18.1",
       "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.18.1.tgz",