Add lucide icons and TOC toggle

public/app.js

@@ -10,8 +10,9 @@
   // === DOM Elements ===
   const sidebarNav = document.getElementById('sidebarNav');
   const searchInput = document.getElementById('searchInput');
-  const btnToggleSidebar = document.getElementById('btnToggleSidebar');
+  const btnToggleSidebarToolbar = document.getElementById('btnToggleSidebarToolbar');
   const btnToggleTheme = document.getElementById('btnToggleTheme');
+  const btnToggleToc = document.getElementById('btnToggleToc');
   const themeSelect = document.getElementById('themeSelect');
   const toolbarBreadcrumb = document.getElementById('toolbarBreadcrumb');
   const contentBody = document.getElementById('contentBody');
@@ -20,6 +21,7 @@
   const articleTitle = document.getElementById('articleTitle');
   const articleMeta = document.getElementById('articleMeta');
   const articleBody = document.getElementById('articleBody');
+  const articleLayout = document.querySelector('.article-layout');
   const tocNav = document.getElementById('tocNav');
   const tocPanel = document.getElementById('tocPanel');
   const loadingBar = document.getElementById('loadingBar');
@@ -28,6 +30,29 @@
   const mobileNavBtn = document.getElementById('mobileNavBtn');
   const themeStylesheet = document.getElementById('themeStylesheet');
   const themeHighlightStylesheet = document.getElementById('themeHighlightStylesheet');
+  const sidebarToggleButtons = [btnToggleSidebarToolbar].filter(Boolean);
+
+  function createSidebarToggleIcon() {
+    return '<i data-lucide="panel-left" aria-hidden="true"></i>';
+  }
+
+  function createThemeToggleIcon(mode) {
+    return mode === 'dark'
+      ? '<i data-lucide="sun" aria-hidden="true"></i>'
+      : '<i data-lucide="moon" aria-hidden="true"></i>';
+  }
+
+  function createTocToggleIcon(collapsed) {
+    return collapsed
+      ? '<i data-lucide="chevrons-left" aria-hidden="true"></i>'
+      : '<i data-lucide="chevrons-right" aria-hidden="true"></i>';
+  }
+
+  function refreshLucideIcons() {
+    if (window.lucide && typeof window.lucide.createIcons === 'function') {
+      window.lucide.createIcons();
+    }
+  }
 
   let currentFile = null;
   const titleByPath = buildTitleIndex(navTree);
@@ -97,8 +122,10 @@
       themeSelect.value = theme.id;
     }
 
-    btnToggleTheme.textContent = mode === 'dark' ? '☀︎' : '☾';
+    btnToggleTheme.innerHTML = createThemeToggleIcon(mode);
     btnToggleTheme.title = mode === 'dark' ? '切换到浅色模式' : '切换到深色模式';
+    btnToggleTheme.setAttribute('aria-label', btnToggleTheme.title);
+    refreshLucideIcons();
   }
 
   function toggleColorMode() {
@@ -120,13 +147,22 @@
       sidebar.classList.remove('collapsed');
       app.classList.remove('sidebar-collapsed');
       localStorage.setItem('webook-sidebar', 'visible');
-      btnToggleSidebar.textContent = '☰';
     } else {
       sidebar.classList.add('collapsed');
       app.classList.add('sidebar-collapsed');
       localStorage.setItem('webook-sidebar', 'hidden');
-      btnToggleSidebar.textContent = '☷';
     }
+
+    const title = visible ? '隐藏侧边栏' : '显示侧边栏';
+    const iconMarkup = createSidebarToggleIcon();
+
+    sidebarToggleButtons.forEach((button) => {
+      button.innerHTML = iconMarkup;
+      button.title = title;
+      button.setAttribute('aria-label', title);
+    });
+
+    refreshLucideIcons();
   }
 
   function toggleSidebar() {
@@ -154,6 +190,36 @@
     sidebarOverlay.classList.add('visible');
   }
 
+  if (mobileNavBtn) {
+    mobileNavBtn.innerHTML = createSidebarToggleIcon();
+    refreshLucideIcons();
+  }
+
+  // === TOC Toggle ===
+  function getTocCollapsed() {
+    return localStorage.getItem('webook-toc') === 'collapsed';
+  }
+
+  function setTocCollapsed(collapsed) {
+    if (!tocPanel || !articleLayout || !btnToggleToc) return;
+
+    tocPanel.classList.toggle('is-collapsed', collapsed);
+    articleLayout.classList.toggle('toc-collapsed', collapsed);
+    localStorage.setItem('webook-toc', collapsed ? 'collapsed' : 'expanded');
+
+    const title = collapsed ? '展开目录' : '收起目录';
+    btnToggleToc.innerHTML = createTocToggleIcon(collapsed);
+    btnToggleToc.title = title;
+    btnToggleToc.setAttribute('aria-label', title);
+    refreshLucideIcons();
+  }
+
+  function toggleToc() {
+    setTocCollapsed(!getTocCollapsed());
+  }
+
+  setTocCollapsed(getTocCollapsed());
+
   function hideMobileSidebar() {
     sidebar.classList.remove('mobile-visible');
     if (sidebarOverlay) {
@@ -519,9 +585,9 @@
     const modified = formatDate(meta.modified);
     const wordCount = meta.wordCount;
     articleMeta.innerHTML = `
-      <span class="article-meta-item">创建时间: ${created}</span>
-      <span class="article-meta-item">修改时间: ${modified}</span>
-      <span class="article-meta-item">字数统计: ${wordCount.toLocaleString()}</span>
+      <span class="article-meta-item"><em>创建时间：${created}</em></span>
+      <span class="article-meta-item"><em>修改时间：${modified}</em></span>
+      <span class="article-meta-item"><em>字数统计：${wordCount.toLocaleString()}</em></span>
     `;
   }
 
@@ -613,8 +679,13 @@
 
   // === Event Listeners ===
   btnToggleTheme.addEventListener('click', toggleColorMode);
-  btnToggleSidebar.addEventListener('click', toggleSidebar);
+  sidebarToggleButtons.forEach((button) => {
+    button.addEventListener('click', toggleSidebar);
+  });
   mobileNavBtn.addEventListener('click', showMobileSidebar);
+  if (btnToggleToc) {
+    btnToggleToc.addEventListener('click', toggleToc);
+  }
   if (themeSelect) {
     themeSelect.addEventListener('change', function () {
       applyTheme(this.value, getStoredColorMode(this.value));