fix(auth-files): sync quota priority display and credential ordering

Read OAuth priorities in quota cards and sort credentials by descending
priority followed by filename order across OAuth and quota pages.

tests/authFileQuotaPanel.test.tsx

@@ -25,6 +25,28 @@ it('shows every reset expiry in chronological order, including duplicates, on bo
   }
 });
 
+it('shows the OAuth credential priority on the quota card', () => {
+  const html = renderToStaticMarkup(<I18nProvider><QuotaCard
+    file={{ name: 'priority.json', provider: 'codex', priority: 7 }}
+    quota={{ status: 'success', rows: [] }} onRefresh={() => {}}
+  /></I18nProvider>);
+  expect(html).toContain('Priority 7');
+  expect(html).not.toContain('Priority 0');
+});
+
+it('normalizes a string priority and keeps zero as the default', () => {
+  const stringPriority = renderToStaticMarkup(<I18nProvider><QuotaCard
+    file={{ name: 'priority.json', provider: 'codex', priority: '3' }}
+    quota={{ status: 'idle', rows: [] }} onRefresh={() => {}}
+  /></I18nProvider>);
+  const missingPriority = renderToStaticMarkup(<I18nProvider><QuotaCard
+    file={{ name: 'default.json', provider: 'codex' }}
+    quota={{ status: 'idle', rows: [] }} onRefresh={() => {}}
+  /></I18nProvider>);
+  expect(stringPriority).toContain('Priority 3');
+  expect(missingPriority).toContain('Priority 0');
+});
+
 it('renders real quota values with bounded bars and keeps unknown distinct from zero', () => {
   const html = render({ status: 'success', rows: [
     { label: 'empty', remainingPercent: 0 }, { label: 'full', remainingPercent: 100 },

tests/authFiles.test.ts

@@ -9,6 +9,7 @@ import {
   oauthModelProvidersFromAuthFiles,
   parseAuthFilePriority,
   setOAuthCredentialFileDisabled,
+  sortAuthFilesByPriority,
   snapshotAuthFiles,
 } from '../src/services/authFiles';
 
@@ -181,6 +182,18 @@ describe('authentication file priority', () => {
     expect(normalizeAuthFilePriorityInput('1.5')).toBeNull();
   });
 
+  it('sorts credentials by descending priority, then filename', () => {
+    expect(sortAuthFilesByPriority([
+      { name: 'zeta.json', priority: 2 },
+      { name: 'Beta.json', priority: 5 },
+      { name: 'alpha.json', priority: 5 },
+      { name: 'default.json' },
+      { name: 'negative.json', priority: -1 },
+    ]).map((file) => file.name)).toEqual([
+      'alpha.json', 'Beta.json', 'zeta.json', 'default.json', 'negative.json',
+    ]);
+  });
+
   it('finds only credentials created or updated by the completed OAuth provider', () => {
     const before = snapshotAuthFiles([
       { name: 'codex-old.json', provider: 'codex', modtime: 1, priority: 8 },