feat: Enhance article segment navigation

Implement segment selection in ReaderView for user-driven playback control. This change allows users to click on specific segments within an article to jump to and play that segment directly.

The Gemini service's HTML parsing has also been simplified by removing redundant selectors and focusing on essential tag removal for more efficient text extraction.

App.tsx

@@ -198,6 +198,18 @@ export default function App() {
     });
   }, [playerState.currentArticleId]);
 
+  const handleSegmentSelect = useCallback((articleId: string, index: number) => {
+    setPlayerState(prev => ({
+        ...prev,
+        currentArticleId: articleId,
+        isPlaying: true
+    }));
+    updateArticle(articleId, {
+        currentSegmentIndex: index,
+        status: PlaybackStatus.PLAYING
+    });
+  }, []);
+
   // -- Keyboard Shortcuts --
   useEffect(() => {
     const handleKeyDown = (e: KeyboardEvent) => {
@@ -478,6 +490,7 @@ export default function App() {
                 article={viewingArticle} 
                 settings={settings} 
                 onToggleAutoScroll={() => setSettings(s => ({...s, autoScroll: !s.autoScroll}))}
+                onSegmentSelect={(index) => viewingArticle && handleSegmentSelect(viewingArticle.id, index)}
               />
           </div>
           
@@ -490,6 +503,7 @@ export default function App() {
                             article={viewingArticle} 
                             settings={settings}
                             onToggleAutoScroll={() => setSettings(s => ({...s, autoScroll: !s.autoScroll}))}
+                            onSegmentSelect={(index) => viewingArticle && handleSegmentSelect(viewingArticle.id, index)}
                           />
                        </div>
                    </div>