fix(收藏/聊天记录检索): 切换页内tab不再污染浏览器历史记录

用户反馈"我的收藏"页面点击tabs切换(全部/图片/视频/文件/语音/文本/链接)会记录到浏览器
历史记录里，导致点击返回一直在这个页面内切换tab，而不是真正返回上一页。

根因：content-library-view.jsx的Favorites/HistoryNav每次切tab都调用navigate()，
即HashNavigation.navigateTo() -> location.hash = ...，每次赋值都会被浏览器记为一条
新的历史记录。切N次tab就push N条记录，无论是系统返回键还是应用自己的"返回"按钮
(HashNavigation.goBack())，都要先把这N条tab切换记录走完才能真正离开页面。

修复：新增HashNavigation.navigateReplace()，用history.replaceState替换当前历史记录
而不是新增一条（hash该更新还是更新，刷新/复制链接不受影响），并手动派发hashchange事件
供tinode-web.jsx现有的监听器捕获——replaceState本身不会自动触发该事件。Favorites的
TYPE_LABELS tabs和HistoryNav（"查找聊天记录"页的聊天记录/图片/视频/文件/链接tabs）
两处tab切换都改用这个新方法，不再计入navigationCount。

已在浏览器实测两处：连续切3次tab后，无论是原生history.back()还是应用返回按钮，都能
一次性返回到进入这个页面之前的真实上一页，不再卡在tab切换历史里。

src/lib/navigation.js

@@ -40,6 +40,22 @@ export default class HashNavigation {
     window.location.hash = url;
   }
 
+  // For switching between sub-tabs of the *same* page (e.g. content-library-view.jsx's favorites/
+  // history type tabs), not for navigating to a different page. `navigateTo`/`location.hash =`
+  // always pushes a new history entry, so clicking through N tabs pushes N entries -- the system
+  // back button (and this class's own goBack()) then has to step back through every tab the user
+  // ever visited before it reaches whatever page they were actually on before this one. `replaceState`
+  // updates the hash (still correct for a refresh or a copied link) without adding a history entry,
+  // so it doesn't inflate navigationCount either -- a tab switch was never a real in-app navigation
+  // to begin with. replaceState doesn't fire `hashchange` on its own, so dispatch one manually for
+  // the existing `window.addEventListener('hashchange', ...)` listener (tinode-web.jsx's
+  // handleHashRoute) to pick up; that handler re-reads window.location.hash itself rather than the
+  // event, so a synthetic event with no detail is indistinguishable from a real one to it.
+  static navigateReplace(url) {
+    window.history.replaceState(null, '', '#' + url);
+    window.dispatchEvent(new Event('hashchange'));
+  }
+
   // Real "back": retraces the hash the user was actually on before, via native browser history,
   // rather than a page's own guess at where it must have been reached from. Returns whether it
   // actually did that -- every call site already has its own hardcoded-destination `navigate(...)`

src/views/content-library-view.jsx

@@ -51,6 +51,13 @@ const navigate = (view, params) => {
   HashNavigation.navigateTo(hash);
 };
 
+// Same as navigate() above but for switching this page's own type tabs (Favorites' 全部/图片/.../链接,
+// History's 聊天记录/图片/视频/文件/链接) -- these change which content shows on the *same* page, not
+// which page the user is on, so they shouldn't push a browser-history entry the way a real navigate()
+// does. Previously every tab click called navigate(), so N tab switches pushed N history entries and
+// the system back button just cycled through past tabs instead of leaving the page.
+const navigateReplace = (view) => HashNavigation.navigateReplace(HashNavigation.setUrlSidePanel(window.location.hash, view));
+
 export const CONTENT_LIBRARY_VIEWS = [
   'favorites', 'favorites-mixed', 'favorites-files', 'favorites-text', 'favorites-voice',
   'favorites-links', 'favorites-image', 'favorites-video', 'favorites-select', 'favorite-share', 'file-download',
@@ -356,7 +363,7 @@ function Favorites({view, tinode, onToast}) {
       right={selecting ? '取消' : '多选'} onRight={() => navigate(selecting ? 'favorites-files' : 'favorites-select')} />
     <Search value={queryInput} onChange={setQueryInput} placeholder="搜索收藏内容" />
     <nav className="library-type-tabs">{TYPE_LABELS.map(([id, label]) => <button type="button" key={id} className={type === id ? 'active' : ''}
-      onClick={() => { setType(id); if (TYPE_ROUTE[id] && !selecting) navigate(TYPE_ROUTE[id]); }}>{label}</button>)}</nav>
+      onClick={() => { setType(id); if (TYPE_ROUTE[id] && !selecting) navigateReplace(TYPE_ROUTE[id]); }}>{label}</button>)}</nav>
     <main className="library-favorite-list">
       {items === null ? <p className="library-empty-hint">加载中…</p> :
         list.length ? <>{list.map(item => <FavoriteItem key={item.favorite_id} item={{...item, _thumbUrl: fileUrls[item.favorite_id],
@@ -563,7 +570,7 @@ function Highlight({text, query}) {
 
 function HistoryNav({active}) {
   const tabs = [['history-search', '聊天记录'], ['history-images', '图片'], ['history-videos', '视频'], ['history-files', '文件'], ['history-links', '链接']];
-  return <nav className="library-history-tabs">{tabs.map(item => <button type="button" key={item[0]} className={active === item[0] ? 'active' : ''} onClick={() => navigate(item[0])}>{item[1]}</button>)}</nav>;
+  return <nav className="library-history-tabs">{tabs.map(item => <button type="button" key={item[0]} className={active === item[0] ? 'active' : ''} onClick={() => navigateReplace(item[0])}>{item[1]}</button>)}</nav>;
 }
 
 const HISTORY_TITLES = {'history-search': '查找聊天记录', 'history-files': '文件', 'history-links': '链接', 'history-images': '图片', 'history-videos': '视频'};

umd/index.dev.js

@@ -4583,6 +4583,10 @@ class HashNavigation {
     navigationCount++;
     window.location.hash = url;
   }
+  static navigateReplace(url) {
+    window.history.replaceState(null, '', '#' + url);
+    window.dispatchEvent(new Event('hashchange'));
+  }
   static goBack() {
     if (navigationCount > 0) {
       navigationCount--;
@@ -8931,6 +8935,7 @@ const navigate = (view, params) => {
   });
   _lib_navigation_js__WEBPACK_IMPORTED_MODULE_3__["default"].navigateTo(hash);
 };
+const navigateReplace = view => _lib_navigation_js__WEBPACK_IMPORTED_MODULE_3__["default"].navigateReplace(_lib_navigation_js__WEBPACK_IMPORTED_MODULE_3__["default"].setUrlSidePanel(window.location.hash, view));
 const CONTENT_LIBRARY_VIEWS = ['favorites', 'favorites-mixed', 'favorites-files', 'favorites-text', 'favorites-voice', 'favorites-links', 'favorites-image', 'favorites-video', 'favorites-select', 'favorite-share', 'file-download', 'file-downloading', 'file-downloaded', 'history-search', 'history-files', 'history-links', 'history-images', 'history-videos'];
 function Icon({
   children
@@ -9432,7 +9437,7 @@ function Favorites({
         className: type === id ? 'active' : '',
         onClick: () => {
           setType(id);
-          if (TYPE_ROUTE[id] && !selecting) navigate(TYPE_ROUTE[id]);
+          if (TYPE_ROUTE[id] && !selecting) navigateReplace(TYPE_ROUTE[id]);
         },
         children: label
       }, id, false))
@@ -9797,7 +9802,7 @@ function HistoryNav({
     children: tabs.map(item => (0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_8__.jsxDEV)("button", {
       type: "button",
       className: active === item[0] ? 'active' : '',
-      onClick: () => navigate(item[0]),
+      onClick: () => navigateReplace(item[0]),
       children: item[1]
     }, item[0], false))
   }, void 0, false);