移除模板分类编辑来源字段

- 删除编辑模板弹窗中分类编辑态的旧 category 来源文本框，避免显示未分类、批量导入或模板名等干扰信息。

- 保留分类名称编辑、颜色、maskid 和拖拽层级能力，旧 category 元数据仅作为兼容数据继续随记录保留。

- 为模板分类编辑补充回归测试，确保点击分类后不再暴露旧 category 来源字段。

- 更新 AGENTS、需求冻结、设计冻结和测试计划文档，明确编辑弹窗不展示或编辑 category 来源元信息。

src/components/TemplateRegistry.test.tsx

@@ -216,6 +216,28 @@ describe('TemplateRegistry', () => {
     expect(await screen.findAllByText('新模板')).toHaveLength(2);
   });
 
+  it('does not expose legacy category metadata while editing template classes', async () => {
+    apiMock.getTemplates.mockResolvedValueOnce([
+      {
+        id: 't1',
+        name: '模板',
+        description: 'desc',
+        classes: [{ id: 'c1', name: '胆囊', color: '#ff0000', zIndex: 10, category: '器官' }],
+        rules: [],
+        color: '#06b6d4',
+        z_index: 3,
+      },
+    ]);
+
+    render(<TemplateRegistry />);
+    fireEvent.click(await screen.findByRole('button', { name: '编辑模板 模板' }));
+    fireEvent.click(screen.getAllByText('胆囊').at(-1)!);
+
+    expect(screen.getByDisplayValue('胆囊')).toBeInTheDocument();
+    expect(screen.queryByDisplayValue('器官')).not.toBeInTheDocument();
+    expect(screen.queryByPlaceholderText('类别')).not.toBeInTheDocument();
+  });
+
   it('shows the semantic tree title and opens the add-class modal from the detail view', async () => {
     apiMock.getTemplates.mockResolvedValueOnce([
       {

src/components/TemplateRegistry.tsx

@@ -685,25 +685,16 @@ export function TemplateRegistry() {
                       className="w-8 h-8 rounded bg-transparent border-0 cursor-pointer shrink-0 disabled:cursor-not-allowed disabled:opacity-50"
                     />
                     {editingClassId === cls.id ? (
-                      <>
-                        <input
-                          type="text"
-                          value={cls.name}
-                          onChange={(e) => updateClass(cls.id, { name: e.target.value })}
-                          onBlur={() => setEditingClassId(null)}
-                          onKeyDown={(e) => e.key === 'Enter' && setEditingClassId(null)}
-                          autoFocus
-                          readOnly={isReservedUnclassifiedClass(cls)}
-                          className="flex-1 bg-[#1a1a1a] border border-white/10 rounded px-2 py-1 text-sm text-white"
-                        />
-                        <input
-                          type="text"
-                          value={cls.category || ''}
-                          onChange={(e) => updateClass(cls.id, { category: e.target.value })}
-                          placeholder="类别"
-                          className="w-24 bg-[#1a1a1a] border border-white/10 rounded px-2 py-1 text-sm text-white"
-                        />
-                      </>
+                      <input
+                        type="text"
+                        value={cls.name}
+                        onChange={(e) => updateClass(cls.id, { name: e.target.value })}
+                        onBlur={() => setEditingClassId(null)}
+                        onKeyDown={(e) => e.key === 'Enter' && setEditingClassId(null)}
+                        autoFocus
+                        readOnly={isReservedUnclassifiedClass(cls)}
+                        className="flex-1 bg-[#1a1a1a] border border-white/10 rounded px-2 py-1 text-sm text-white"
+                      />
                     ) : (
                       <>
                         <span