feat(usage): show Zed plan quota on the dashboard

Add a Zed usage handler so connected Zed accounts appear on
/dashboard/quota. Reads GET /client/users/me for plan, edit
predictions, optional hosted model requests and billing-cycle reset.

Render unlimited rows as "N used · Unlimited" instead of 0 / ∞, and
surface overdue-invoice / token-billing messages.

src/app/(dashboard)/dashboard/usage/components/ProviderLimits/utils.js

@@ -558,6 +558,22 @@ export function parseQuotaData(provider, data) {
         }
         break;
 
+      case "zed":
+        // Edit predictions + optional hosted model_requests; unlimited uses remainingPercentage.
+        if (data.quotas) {
+          Object.entries(data.quotas).forEach(([name, quota]) => {
+            normalizedQuotas.push({
+              name,
+              used: quota.used || 0,
+              total: quota.total || 0,
+              resetAt: quota.resetAt || null,
+              remainingPercentage: quota.remainingPercentage,
+              unlimited: quota.unlimited,
+            });
+          });
+        }
+        break;
+
       default:
         // Generic fallback for unknown providers
         if (data.quotas) {