refactor: remove Codex credits handling from services and UI components

- Eliminated CodexCreditsSnapshot interface and related logic from CodexUsageService and UI components.
- Updated CodexUsageSection to display only plan type, removing credits information for a cleaner interface.
- Streamlined Codex usage formatting functions by removing unused credit formatting logic.

These changes simplify the Codex usage management by focusing on plan types, enhancing clarity and maintainability.

apps/ui/src/components/views/settings-view/codex/codex-usage-section.tsx

@@ -6,7 +6,6 @@ import { OpenAIIcon } from '@/components/ui/provider-icon';
 import { cn } from '@/lib/utils';
 import { getElectronAPI } from '@/lib/electron';
 import {
-  formatCodexCredits,
   formatCodexPlanType,
   formatCodexResetTime,
   getCodexWindowLabel,
@@ -25,7 +24,6 @@ const UPDATED_LABEL = 'Updated';
 const CODEX_FETCH_ERROR = 'Failed to fetch usage';
 const CODEX_REFRESH_LABEL = 'Refresh Codex usage';
 const PLAN_LABEL = 'Plan';
-const CREDITS_LABEL = 'Credits';
 const WARNING_THRESHOLD = 75;
 const CAUTION_THRESHOLD = 50;
 const MAX_PERCENTAGE = 100;
@@ -49,7 +47,6 @@ export function CodexUsageSection() {
   const rateLimits = codexUsage?.rateLimits ?? null;
   const primary = rateLimits?.primary ?? null;
   const secondary = rateLimits?.secondary ?? null;
-  const credits = rateLimits?.credits ?? null;
   const planType = rateLimits?.planType ?? null;
   const rateLimitWindows = [primary, secondary].filter(isRateLimitWindow);
   const hasMetrics = rateLimitWindows.length > 0;
@@ -206,20 +203,11 @@ export function CodexUsageSection() {
             })}
           </div>
         )}
-        {(planType || credits) && (
+        {planType && (
           <div className="rounded-xl border border-border/60 bg-secondary/20 p-4 text-xs text-muted-foreground">
-            {planType && (
-              <div>
-                {PLAN_LABEL}:{' '}
-                <span className="text-foreground">{formatCodexPlanType(planType)}</span>
-              </div>
-            )}
-            {credits && (
-              <div>
-                {CREDITS_LABEL}:{' '}
-                <span className="text-foreground">{formatCodexCredits(credits)}</span>
-              </div>
-            )}
+            <div>
+              {PLAN_LABEL}: <span className="text-foreground">{formatCodexPlanType(planType)}</span>
+            </div>
           </div>
         )}
         {!hasMetrics && !error && canFetchUsage && !isLoading && (

apps/ui/src/lib/codex-usage-format.ts

@@ -1,12 +1,8 @@
-import { type CodexCreditsSnapshot, type CodexPlanType } from '@/store/app-store';
+import { type CodexPlanType } from '@/store/app-store';
 
 const WINDOW_DEFAULT_LABEL = 'Usage window';
 const RESET_LABEL = 'Resets';
 const UNKNOWN_LABEL = 'Unknown';
-const UNAVAILABLE_LABEL = 'Unavailable';
-const UNLIMITED_LABEL = 'Unlimited';
-const AVAILABLE_LABEL = 'Available';
-const NONE_LABEL = 'None';
 const DAY_UNIT = 'day';
 const HOUR_UNIT = 'hour';
 const MINUTE_UNIT = 'min';
@@ -77,10 +73,3 @@ export function formatCodexPlanType(plan: CodexPlanType | null): string {
   if (!plan) return UNKNOWN_LABEL;
   return PLAN_TYPE_LABELS[plan] ?? plan;
 }
-
-export function formatCodexCredits(snapshot: CodexCreditsSnapshot | null): string {
-  if (!snapshot) return UNAVAILABLE_LABEL;
-  if (snapshot.unlimited) return UNLIMITED_LABEL;
-  if (snapshot.balance) return snapshot.balance;
-  return snapshot.hasCredits ? AVAILABLE_LABEL : NONE_LABEL;
-}

apps/ui/src/store/app-store.ts

@@ -719,12 +719,6 @@ export type CodexPlanType =
   | 'edu'
   | 'unknown';
 
-export interface CodexCreditsSnapshot {
-  balance?: string;
-  unlimited?: boolean;
-  hasCredits?: boolean;
-}
-
 export interface CodexRateLimitWindow {
   limit: number;
   used: number;
@@ -738,7 +732,6 @@ export interface CodexUsage {
   rateLimits: {
     primary?: CodexRateLimitWindow;
     secondary?: CodexRateLimitWindow;
-    credits?: CodexCreditsSnapshot;
     planType?: CodexPlanType;
   } | null;
   lastUpdated: string;