Prevent note list bounce by reserving fixed height for loading more banner

src/components/EvercloneWorkspace.tsx

@@ -2347,12 +2347,16 @@ export default function EvercloneWorkspace() {
             </div>
           </div>
 
-          {/* Loading indicator for next page */}
-          {loadingMore && (
-            <div className="py-1 px-3 bg-emerald-50 text-center text-[10px] text-evernote-green font-medium animate-pulse rounded">
+          {/* Reserved slot for loading indicator to prevent layout bounce when loading more notes */}
+          <div className="h-5 flex items-center justify-center">
+            <div
+              className={`w-full py-0.5 px-3 bg-emerald-50 text-center text-[10px] text-evernote-green font-medium rounded transition-opacity duration-150 ${
+                loadingMore ? 'opacity-100 animate-pulse' : 'opacity-0 pointer-events-none'
+              }`}
+            >
               Loading more notes…
             </div>
-          )}
+          </div>
 
           {/* Collapsible Filter Panel */}
           {showFilterPanel && (