Split initialization into separate effects and focus note after load

src/pages/Index.tsx

@@ -916,17 +916,23 @@ const Index = () => {
     }
   };
 
-  // Load initial notes and scratch
   useEffect(() => {
-    const init = async () => {
+    const initIndexes = async () => {
       await initializeIndexes();
+    };
+    initIndexes();
+  }, []);
+
+  useEffect(() => {
+    const loadInitialData = async () => {
       if (isInitialized) {
         await loadNotes();
         await loadLatestScratch();
         await loadFontSizeSetting();
+        currentNoteRef.current?.focus();
       }
     };
-    init();
+    loadInitialData();
   }, [isInitialized]);
 
   // Helper function to format date in yyyy-MM-dd hh:mm:ss format