feat: show live Codex usage status in dashboard

Store Codex wham/usage live plan and rate-limit state during account refresh, surface safe dashboard badges, and keep JWT subscription expiry as stale fallback only. Redacts balance and spend limit amounts from API/UI exposure.

scripts/dashboard-ux.ts

@@ -425,8 +425,30 @@ async function handleMockApi(route: Route, state: MockApiState) {
           accountId: 'acct_test',
           email: 'codex@example.com',
           planType: 'plus',
-          subscriptionUntil: '2099-01-01T00:00:00.000Z',
+          subscriptionUntil: null,
           subscriptionLastChecked: '2026-01-01T00:00:00.000Z',
+          subscriptionSource: null,
+          liveStatus: {
+            checkedAt: '2026-01-01T00:00:00.000Z',
+            source: 'wham/usage',
+            planType: 'plus',
+            email: 'codex@example.com',
+            rateLimit: {
+              allowed: true,
+              limitReached: false,
+              primaryWindow: {
+                limitWindowSeconds: 18000,
+                resetAfterSeconds: 3600,
+                resetAt: '2026-01-01T01:00:00.000Z',
+                usedPercent: 8,
+              },
+              secondaryWindow: null,
+            },
+            rateLimitReachedType: null,
+            additionalRateLimits: [],
+            credits: null,
+            spendControl: null,
+          },
           exists: true,
         },
       ],