chore(ci): correct Gitea runner to runs-on ubuntu-24.04 and feat(billing): implement US-3.7 billing/subscription UX

memento-note/components/settings/billing-plans.tsx

@@ -297,7 +297,7 @@ export function BillingPlans() {
   let totalUsed = 0;
   let totalLimit = 0;
   if (quotas) {
-    Object.entries(quotas).forEach(([_, q]) => {
+    Object.entries(quotas as Record<string, any>).forEach(([_, q]) => {
       if (q.limit > 0 && q.limit !== Infinity) {
         totalUsed += q.used;
         totalLimit += q.limit;
@@ -471,7 +471,7 @@ export function BillingPlans() {
               <Loader2 className="h-6 w-6 animate-spin text-brand-accent" />
             </div>
           )}
-          {quotas && Object.entries(quotas).map(([key, q]) => {
+          {quotas && Object.entries(quotas as Record<string, any>).map(([key, q]) => {
             const pct = q.limit > 0 && q.limit !== Infinity ? (q.used / q.limit) * 100 : 0;
             const isUnlimited = q.limit === Infinity || q.limit <= 0;
             
@@ -516,12 +516,13 @@ export function BillingPlans() {
       {isPaid && <BillingHistory />}
 
       {/* Interval Toggle & Plan Cards */}
-      <div className="space-y-8 pt-6 border-t border-border/40">
-        <div className="text-center space-y-2">
-          <h3 className="text-xs font-bold uppercase tracking-[0.2em] text-concrete">
-            {t('billing.upgradePlan') || 'Changer de plan'}
-          </h3>
-        </div>
+      {!isPaid && (
+        <div className="space-y-8 pt-6 border-t border-border/40">
+          <div className="text-center space-y-2">
+            <h3 className="text-xs font-bold uppercase tracking-[0.2em] text-concrete">
+              {t('billing.upgradePlan') || 'Changer de plan'}
+            </h3>
+          </div>
 
           {billingEnabled && (
             <div className="flex items-center gap-2 justify-center">
@@ -603,6 +604,7 @@ export function BillingPlans() {
             ))}
           </div>
         </div>
+      )}
 
       {/* Footer Info */}
       <div className="bg-slate-50 dark:bg-black/20 rounded-[32px] p-8 border border-border/40 flex flex-col md:flex-row items-center justify-between gap-8">