feat: add Cursor usage quota tracking

Adds Cursor as a supported quota provider
Reads Cursor auth from env, token files, or local app data
Improves Cursor usage labels in the UI

packages/ui/src/lib/i18n/messages/es.ts

@@ -2572,6 +2572,11 @@ export const dict: Record<I18nKey, string> = {
   "quota.window.monthly": "Monthly Limit",
   "quota.window.credits": "Credits",
   "quota.window.creditsBalance": "Credits Balance",
+  "quota.window.billingCycle": "Billing Cycle",
+  "quota.window.auto": "Auto",
+  "quota.window.api": "API",
+  "quota.window.planLimit": "Plan Limit",
+  "quota.window.onDemand": "On-demand",
   "quota.window.session": "Session",
   "quota.window.premium": "Premium Interactions",
   "quota.window.chat": "Chat Requests",