fix(ui): add iFlow to PROVIDER_ASSETS + sync validation test

- Add iflow.png to PROVIDER_ASSETS map

- Add backend-ui-provider-arrays-sync.test.ts to catch mismatches

- Addresses PR #384 review: dual source of truth + missing iFlow

tests/unit/cliproxy/backend-ui-provider-arrays-sync.test.ts

@@ -0,0 +1,40 @@
+/**
+ * Provider Sync Test
+ *
+ * Validates that backend CLIPROXY_PROFILES and UI CLIPROXY_PROVIDERS stay in sync.
+ * This test catches mismatches when adding new providers.
+ */
+
+import { describe, expect, test } from 'bun:test';
+import { CLIPROXY_PROFILES } from '../../../src/auth/profile-detector';
+
+// UI providers (must manually sync - this test validates the sync)
+const UI_CLIPROXY_PROVIDERS = [
+  'gemini',
+  'codex',
+  'agy',
+  'qwen',
+  'iflow',
+  'kiro',
+  'ghcp',
+  'claude',
+] as const;
+
+describe('Provider Sync', () => {
+  test('backend CLIPROXY_PROFILES matches UI CLIPROXY_PROVIDERS', () => {
+    const backend = [...CLIPROXY_PROFILES].sort();
+    const ui = [...UI_CLIPROXY_PROVIDERS].sort();
+
+    expect(backend).toEqual(ui);
+  });
+
+  test('both arrays have same length', () => {
+    expect(CLIPROXY_PROFILES.length).toBe(UI_CLIPROXY_PROVIDERS.length);
+  });
+
+  test('UI array contains all backend providers', () => {
+    for (const provider of CLIPROXY_PROFILES) {
+      expect(UI_CLIPROXY_PROVIDERS).toContain(provider);
+    }
+  });
+});

ui/src/lib/provider-config.ts

@@ -35,6 +35,7 @@ export const PROVIDER_ASSETS: Record<string, string> = {
   agy: '/assets/providers/agy.png',
   codex: '/assets/providers/openai.svg',
   qwen: '/assets/providers/qwen-color.svg',
+  iflow: '/assets/providers/iflow.png',
   kiro: '/assets/providers/kiro.png',
   ghcp: '/assets/providers/copilot.svg',
   claude: '/assets/providers/claude.svg',