style(ui): 替换分析标签组件为自定义样式实现

移除对 Ant Design Segmented 组件的依赖，改用自定义 div 实现标签切换。这提供了更精细的样式控制，优化了视觉外观和交互反馈，并消除了不必要的第三方组件依赖。

frontend/src/pages/business/MeetingPreview.css

@@ -354,19 +354,51 @@
 }
 
 .meeting-preview-analysis-tabs {
-  margin: 18px 0 14px;
-}
-
-.meeting-preview-analysis-tabs .ant-segmented {
-  width: 100%;
-  padding: 5px;
-  border-radius: 16px;
+  display: inline-flex;
+  align-items: center;
   background: var(--app-bg-surface-soft);
+  padding: 5px;
+  border-radius: 12px;
+  gap: 4px;
+  margin: 24px 0 20px;
+  overflow-x: auto;
+  scrollbar-width: none;
+  border: 1px solid var(--app-border-color);
+  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.02);
 }
 
-.meeting-preview-analysis-tabs .ant-segmented-item {
-  min-height: 40px;
-  border-radius: 12px;
+.meeting-preview-analysis-tabs::-webkit-scrollbar {
+  display: none;
+}
+
+.meeting-preview-analysis-tab {
+  padding: 8px 24px;
+  border-radius: 8px;
+  color: var(--app-text-secondary);
+  font-size: 14px;
+  font-weight: 500;
+  cursor: pointer;
+  white-space: nowrap;
+  border: 1px solid transparent;
+  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
+}
+
+.meeting-preview-analysis-tab:hover {
+  color: var(--app-text-main);
+  background: rgba(255, 255, 255, 0.4);
+}
+
+.meeting-preview-analysis-tab.active {
+  background: var(--app-bg-surface);
+  color: var(--app-primary-color);
+  font-weight: 600;
+  border-color: rgba(0, 0, 0, 0.04);
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
+}
+
+.meeting-preview-analysis-tab.active:hover {
+  background: var(--app-bg-surface);
+  color: var(--app-primary-color);
 }
 
 .meeting-preview-analysis-panel {

frontend/src/pages/business/MeetingPreview.tsx

@@ -644,16 +644,20 @@ export default function MeetingPreview() {
         </div>
 
         <div className="meeting-preview-analysis-tabs">
-          <Segmented
-            value={analysisTab}
-            onChange={(value) => setAnalysisTab(value as AnalysisTab)}
-            options={[
-              { label: TEXT.analysisChapters, value: "chapters" },
-              { label: TEXT.analysisSpeakers, value: "speakers" },
-              { label: TEXT.analysisKeyPoints, value: "actions" },
-              { label: TEXT.analysisTodos, value: "todos" },
-            ]}
-          />
+          {[
+            { label: TEXT.analysisChapters, value: "chapters" },
+            { label: TEXT.analysisSpeakers, value: "speakers" },
+            { label: TEXT.analysisKeyPoints, value: "actions" },
+            { label: TEXT.analysisTodos, value: "todos" },
+          ].map((tab) => (
+            <div
+              key={tab.value}
+              className={`meeting-preview-analysis-tab ${analysisTab === tab.value ? 'active' : ''}`}
+              onClick={() => setAnalysisTab(tab.value as AnalysisTab)}
+            >
+              {tab.label}
+            </div>
+          ))}
         </div>
 
         <div className="meeting-preview-analysis-panel">