feat: enhance SaveStatusBadge component with pending changes display and save functionality

src/app/App.tsx

@@ -35,7 +35,7 @@ type AppId =
 
 export default function App() {
   const [currentPage, setCurrentPage] = useState<Page>('status');
-  const { config, setConfig, saveStatus, reload } = useSettings();
+  const { config, setConfig, saveStatus, pendingCount, flushNow, reload } = useSettings();
   const [showSearch, setShowSearch] = useState(false);
   const [showProfileMenu, setShowProfileMenu] = useState(false);
 
@@ -168,7 +168,7 @@ function AppPage({ title, onBack }: { title: string; onBack: () => void }) {
             >
               <AppWindow className="w-5 h-5 text-white" />
             </button>
-            <SaveStatusBadge status={saveStatus} onReload={reload} />
+            <SaveStatusBadge status={saveStatus} pendingCount={pendingCount} onSave={flushNow} onReload={reload} />
             <div className="relative">
               <button
                 onClick={() => setShowProfileMenu(!showProfileMenu)}
@@ -285,46 +285,61 @@ function AppPage({ title, onBack }: { title: string; onBack: () => void }) {
 /**
  * Tiny indicator that reflects the current save status of the settings
  * file. Renders nothing when idle (so it doesn't clutter the header).
- * Clicking the error badge re-attempts the load.
  */
 function SaveStatusBadge({
   status,
+  pendingCount,
+  onSave,
   onReload,
 }: {
-  status: 'idle' | 'loading' | 'saving' | 'saved' | 'error';
+  status: 'idle' | 'loading' | 'unsaved' | 'saving' | 'saved' | 'error';
+  pendingCount: number;
+  onSave: () => void;
   onReload: () => void;
 }) {
   if (status === 'idle') return null;
+
   if (status === 'loading') {
     return (
-      <span
+      <span className="text-xs text-white/80 inline-flex items-center gap-1" title="Loading settings from /.sys/config.json">
-        className="text-xs text-white/80 inline-flex items-center gap-1"
-        title="Loading settings from /.sys/config.json"
-      >
         <Loader2 className="w-3 h-3 animate-spin" /> Loading
       </span>
     );
   }
+
+  if (status === 'unsaved') {
+    return (
+      <span className="inline-flex items-center gap-1">
+        <span className="text-xs text-amber-300" title={`${pendingCount} unsaved change${pendingCount === 1 ? '' : 's'}`}>
+          {pendingCount} unsaved
+        </span>
+        <button
+          onClick={onSave}
+          className="text-xs bg-amber-500 hover:bg-amber-400 text-white px-2 py-0.5 rounded"
+          title="Save now"
+        >
+          Save
+        </button>
+      </span>
+    );
+  }
+
   if (status === 'saving') {
     return (
-      <span
+      <span className="text-xs text-white/80 inline-flex items-center gap-1" title="Saving to /.sys/config.json">
-        className="text-xs text-white/80 inline-flex items-center gap-1"
-        title="Saving to /.sys/config.json"
-      >
         <Loader2 className="w-3 h-3 animate-spin" /> Saving
       </span>
     );
   }
+
   if (status === 'saved') {
     return (
-      <span
+      <span className="text-xs text-white/80 inline-flex items-center gap-1" title="Saved to /.sys/config.json">
-        className="text-xs text-white/80 inline-flex items-center gap-1"
-        title="Saved to /.sys/config.json"
-      >
         <Check className="w-3 h-3" /> Saved
       </span>
     );
   }
+
   // error
   return (
     <button