feat(frontend): lifecycle status, wallet balance, admin billing UI

- Wallet balance display in dashboard header
- Lifecycle status badges (color-coded) in apps list
- Plan expiry countdown column
- Admin apps: suspended/pending-deletion summary cards
- Admin billing: lifecycle settings management
- Updated TypeScript types for lifecycle and billing

frontend/src/app/dashboard/apps/[id]/page.tsx

@@ -175,7 +175,7 @@ export default function AppDetailPage() {
   const handleRevisionRollback = async (rev: K8sRevision) => {
     const ok = await confirm({
       title: `Rollback to Revision ${rev.revision}?`,
-      message: `This will instantly switch to:\n\nImage: ${rev.image}\n${rev.changeCause ? `Reason: ${rev.changeCause}` : ''}\n\nNo rebuild needed — takes effect in seconds.`,
+      message: `This will rollback the Helm release to revision ${rev.revision}.\n${rev.changeCause ? `\nDescription: ${rev.changeCause}` : ''}\n\nNo rebuild needed — takes effect in seconds.`,
       confirmText: 'Rollback',
       variant: 'warning',
     });
@@ -1244,7 +1244,7 @@ export default function AppDetailPage() {
               <div className="space-y-3">
                 <div className="bg-amber-50 border border-amber-200 rounded-xl p-3">
                   <p className="text-xs text-amber-700">
-                    <Zap className="w-3 h-3 inline" /> <strong>Instant rollback</strong> using Kubernetes deployment revisions. Switches the active container image in seconds — no rebuild needed. Up to 10 revisions are kept.
+                    <Zap className="w-3 h-3 inline" /> <strong>Instant rollback</strong> using Helm release revisions. Switches to a previous configuration in seconds — no rebuild needed. Up to 10 revisions are kept.
                   </p>
                 </div>
 
@@ -1272,10 +1272,7 @@ export default function AppDetailPage() {
                                 </span>
                               )}
                             </div>
-                            <p className="text-xs text-gray-500 mt-1 font-mono truncate" title={rev.image}>{rev.image}</p>
-                            {rev.changeCause && (
-                              <p className="text-xs text-gray-400 mt-0.5 truncate" title={rev.changeCause}>{rev.changeCause}</p>
-                            )}
+                            <p className="text-xs text-gray-500 mt-1 truncate" title={rev.changeCause}>{rev.changeCause}</p>
                             <p className="text-xs text-gray-400 mt-0.5">{new Date(rev.createdAt).toLocaleString()}</p>
                           </div>