fix(cliproxy): surface quota metadata in CLI

tests/unit/commands/cliproxy-quota-subcommand.test.ts

@@ -0,0 +1,78 @@
+import { describe, expect, it } from 'bun:test';
+
+async function loadQuotaCommandTestExports() {
+  const moduleId = Date.now() + Math.random();
+  const mod = await import(
+    `../../../src/commands/cliproxy/quota-subcommand?cliproxy-quota-subcommand=${moduleId}`
+  );
+  return mod.__testExports;
+}
+
+describe('cliproxy quota subcommand failure formatting', () => {
+  it('builds Gemini failure lines with the remediation hint, code, and detail', async () => {
+    const { getQuotaFailureDisplayEntries } = await loadQuotaCommandTestExports();
+
+    const entries = getQuotaFailureDisplayEntries({
+      error: 'Google requires you to verify this account before using Gemini CLI quota.',
+      actionHint:
+        'Complete the Google account verification mentioned above, then retry quota refresh.',
+      httpStatus: 403,
+      errorCode: 'PERMISSION_DENIED',
+      errorDetail: 'ACCOUNT_VERIFICATION_REQUIRED',
+      retryable: false,
+    });
+
+    expect(entries).toEqual([
+      {
+        tone: 'error',
+        text: 'Google requires you to verify this account before using Gemini CLI quota.',
+      },
+      {
+        tone: 'info',
+        text: 'Complete the Google account verification mentioned above, then retry quota refresh.',
+      },
+      {
+        tone: 'dim',
+        text: 'HTTP 403 | Code: PERMISSION_DENIED',
+      },
+      {
+        tone: 'dim',
+        text: 'Detail: ACCOUNT_VERIFICATION_REQUIRED',
+      },
+    ]);
+  });
+
+  it('marks retryable failures in the CLI diagnostics line', async () => {
+    const { getQuotaFailureDisplayEntries } = await loadQuotaCommandTestExports();
+
+    const entries = getQuotaFailureDisplayEntries({
+      error: 'Gemini quota service unavailable (HTTP 503)',
+      actionHint: 'Retry later. This looks like a temporary Google upstream problem.',
+      httpStatus: 503,
+      errorCode: 'provider_unavailable',
+      errorDetail: 'Service temporarily unavailable',
+      retryable: true,
+    });
+
+    expect(entries[2]).toEqual({
+      tone: 'dim',
+      text: 'HTTP 503 | Code: provider_unavailable | Retryable',
+    });
+  });
+
+  it('suppresses duplicate error detail lines', async () => {
+    const { getQuotaFailureDisplayEntries } = await loadQuotaCommandTestExports();
+
+    const entries = getQuotaFailureDisplayEntries({
+      error: 'Internal Server Error',
+      errorDetail: 'Internal Server Error',
+    });
+
+    expect(entries).toEqual([
+      {
+        tone: 'error',
+        text: 'Internal Server Error',
+      },
+    ]);
+  });
+});