fix(ai): 自动追加AI任务类型

apps/web/lib/task-category.test.ts

@@ -6,6 +6,7 @@ import {
   PRESET_CATEGORIES,
   findCategoryByCode,
   getDefaultCategoryByGroup,
+  ensureTaskCategoryByName,
   normalizeTaskCategories,
   resolveCategoryIdFromCode,
 } from './task-category';
@@ -47,3 +48,23 @@ test('falls back to default group category for unknown code', () => {
 test('finds category by code', () => {
   assert.equal(findCategoryByCode(PRESET_CATEGORIES, 'backend_api')?.name, '后端接口');
 });
+
+test('returns existing category when AI task type name already exists in same group', () => {
+  const result = ensureTaskCategoryByName(PRESET_CATEGORIES, '  前端开发  ', 'development');
+
+  assert.equal(result.created, false);
+  assert.equal(result.category.id, 'cat-1');
+  assert.equal(result.categories.length, PRESET_CATEGORIES.length);
+});
+
+test('creates non-system category for missing AI task type name', () => {
+  const result = ensureTaskCategoryByName(PRESET_CATEGORIES, '人员名片交互', 'development');
+
+  assert.equal(result.created, true);
+  assert.equal(result.category.name, '人员名片交互');
+  assert.equal(result.category.group, 'development');
+  assert.equal(result.category.isSystem, false);
+  assert.equal(result.category.code, '人员名片交互');
+  assert.ok(result.category.id.startsWith('cat-ai-'));
+  assert.equal(result.categories.at(-1)?.id, result.category.id);
+});