feat(chat): implement search functionality for chat sessions

- Added search capability to the chat interface, allowing users to find sessions by title or message content.
- Integrated debounce logic for search input to enhance performance and user experience.
- Updated the sidebar to include a search input field and loading indicator during search operations.
- Implemented full-text search in the database for efficient session retrieval based on user queries.
- Enhanced session management by filtering out orphan sessions during search results.

app/chat/page.tsx

@@ -54,7 +54,9 @@ export default function ChatPage() {
     loadSessions,
     saveSession, 
     deleteSession,
-    isGeneratingTitle
+    isGeneratingTitle,
+    searchSessions,
+    isSearching
   } = useChatStorage();
 
   const { isDownloading, progress } = useAutoLabelingModel();
@@ -949,6 +951,8 @@ Ao responder sobre fatos atuais ou notícias, inicie mencionando explicitamente
             }}
             onDeleteSession={deleteSession}
             onNewChat={handleNewChat}
+            onSearch={searchSessions}
+            isSearching={isSearching}
           />
         </ResizablePanel>