Fix agent output validation to prevent false verified status (#807)

* Changes from fix/cursor-fix

* feat: Enhance provider error messages with diagnostic context, address test failure, fix port change, move playwright tests to different port

* Update apps/ui/src/components/views/board-view/dialogs/add-feature-dialog.tsx

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

* ci: Update test server port from 3008 to 3108 and add environment configuration

* fix: Correct typo in health endpoint URL and standardize port env vars

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

apps/server/tests/unit/lib/thinking-level-normalization.test.ts

@@ -0,0 +1,20 @@
+import { describe, it, expect } from 'vitest';
+import { normalizeThinkingLevelForModel } from '@automaker/types';
+
+describe('normalizeThinkingLevelForModel', () => {
+  it('preserves explicitly selected none for Opus models', () => {
+    expect(normalizeThinkingLevelForModel('claude-opus', 'none')).toBe('none');
+  });
+
+  it('falls back to none when Opus receives an unsupported manual thinking level', () => {
+    expect(normalizeThinkingLevelForModel('claude-opus', 'medium')).toBe('none');
+  });
+
+  it('keeps adaptive for Opus when adaptive is selected', () => {
+    expect(normalizeThinkingLevelForModel('claude-opus', 'adaptive')).toBe('adaptive');
+  });
+
+  it('preserves supported manual levels for non-Opus models', () => {
+    expect(normalizeThinkingLevelForModel('claude-sonnet', 'high')).toBe('high');
+  });
+});