feat: 添加对话搜索功能 - 支持搜索标题和内容

www/style.css

@@ -261,6 +261,143 @@ body {
   background: rgba(229, 62, 62, 0.1);
 }
 
+/* 搜索栏 */
+.search-bar {
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background: rgba(0,0,0,0.5);
+  display: none;
+  z-index: 1100;
+}
+
+.search-bar.show {
+  display: flex;
+  flex-direction: column;
+}
+
+.search-input-wrapper {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 12px 16px;
+  background: white;
+  border-bottom: 1px solid var(--border-color);
+}
+
+.search-input-wrapper svg {
+  color: var(--text-light);
+}
+
+.search-input-wrapper input {
+  flex: 1;
+  font-size: 16px;
+  border: none;
+  outline: none;
+  background: transparent;
+}
+
+.search-close-btn {
+  padding: 8px;
+  background: transparent;
+  border: none;
+  color: var(--text-light);
+  cursor: pointer;
+}
+
+.search-close-btn:hover {
+  color: var(--text-color);
+}
+
+.search-results {
+  flex: 1;
+  background: white;
+  overflow-y: auto;
+  padding: 8px 16px;
+}
+
+.search-empty {
+  padding: 40px 20px;
+  text-align: center;
+  color: var(--text-light);
+}
+
+.search-result-item {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+  padding: 12px 16px;
+  background: white;
+  border: 1px solid var(--border-color);
+  border-radius: 12px;
+  margin-bottom: 8px;
+  cursor: pointer;
+  transition: all 0.2s;
+}
+
+.search-result-item:hover {
+  border-color: var(--primary);
+  background: rgba(102, 126, 234, 0.05);
+}
+
+.search-result-item.pinned {
+  border-color: var(--primary);
+  background: rgba(102, 126, 234, 0.08);
+}
+
+.search-result-title {
+  font-size: 16px;
+  font-weight: 500;
+  color: var(--text-color);
+}
+
+.search-result-snippet {
+  font-size: 14px;
+  color: var(--text-light);
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.search-result-meta {
+  font-size: 12px;
+  color: var(--text-light);
+}
+
+/* 底部工具栏 */
+.list-footer {
+  display: flex;
+  justify-content: center;
+  padding: 12px 16px;
+  background: white;
+  border-top: 1px solid var(--border-color);
+}
+
+.footer-btn {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  padding: 10px 20px;
+  background: white;
+  border: 1px solid var(--border-color);
+  border-radius: 20px;
+  font-size: 14px;
+  color: var(--text-light);
+  cursor: pointer;
+  transition: all 0.2s;
+}
+
+.footer-btn:hover {
+  border-color: var(--primary);
+  color: var(--primary);
+}
+
+.footer-btn:active {
+  background: rgba(102, 126, 234, 0.1);
+}
+
 /* ==================== 对话页面 ==================== */
 
 #chatPage {