feat(router): 支持?page=深链接&错误路由回退

- 导航/子菜单 href 统一为 ?page=<id>[#<slug>]，支持复制/新开直达
- 启动时解析 ?page= 并同步导航高亮；子菜单跳转可组合 hash 定位分类
- 输入无效 pageId 时自动纠正 URL 到首页（replaceState，避免“内容回退但地址栏仍错误”）
- 构建生成 dist/404.html：将 /<id>（或 /<repo>/<id>）回跳到 /?page=<id> 并保留 hash

templates/components/navigation.hbs

@@ -1,7 +1,7 @@
 <div data-container="nav-items">
 {{#each this}}
 <div class="nav-item-wrapper">
-    <a href="#" class="nav-item{{#if isActive}} active{{/if}}{{#if active}} active{{/if}}" data-page="{{id}}" data-type="nav-item" data-id="{{id}}" data-name="{{name}}" data-icon="{{icon}}">
+    <a href="?page={{id}}" class="nav-item{{#if isActive}} active{{/if}}{{#if active}} active{{/if}}" data-page="{{id}}" data-type="nav-item" data-id="{{id}}" data-name="{{name}}" data-icon="{{icon}}">
         <div class="icon-container">
             <i class="{{icon}}"></i>
         </div>
@@ -11,7 +11,7 @@
     {{#if submenu}}
     <div class="submenu">
         {{#each submenu}}
-        <a href="#{{#if slug}}{{slug}}{{else}}{{name}}{{/if}}" class="submenu-item" data-page="{{../id}}" data-category="{{name}}" data-category-id="{{#if slug}}{{slug}}{{else}}{{name}}{{/if}}">
+        <a href="?page={{../id}}#{{#if slug}}{{slug}}{{else}}{{name}}{{/if}}" class="submenu-item" data-page="{{../id}}" data-category="{{name}}" data-category-id="{{#if slug}}{{slug}}{{else}}{{name}}{{/if}}">
             <i class="{{icon}}"></i>
             <span>{{name}}</span>
         </a>