feat(版本): 优化概览与只读状态

关键改动：

- 增加需求排序和版本只读状态规则及测试

- 完善版本概览阶段耗时、项目页和工作台展示

- 优化小宝预警请求节流、建议状态和风险过滤

Co-Authored-By: Codex GPT-5 <codex@openai.com>

apps/web/lib/requirement-sort.test.ts

@@ -0,0 +1,63 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+
+import type { Requirement } from './requirement';
+import { sortRequirementsByCreatedAt } from './requirement-sort';
+
+const baseRequirement = {
+  description: '',
+  productId: 'product-1',
+  projectId: 'project-1',
+  sourceType: 'internal',
+  sourceTarget: '',
+  platforms: [] as string[],
+  typeId: 'type-1',
+  status: 'pending_review',
+  priority: 'P2',
+  effort: 'M',
+  creator: 'tester',
+};
+
+function req(id: string, code: string, createdAt: string): Requirement {
+  return {
+    ...baseRequirement,
+    id,
+    code,
+    title: code,
+    createdAt,
+  } as Requirement;
+}
+
+test('sorts requirements by created time descending by default', () => {
+  const requirements = [
+    req('req-100', 'REQ-001', '2026-06-28T09:00:00.000Z'),
+    req('req-300', 'REQ-003', '2026-06-29T09:00:00.000Z'),
+    req('req-200', 'REQ-002', '2026-06-28T18:00:00.000Z'),
+  ];
+
+  assert.deepEqual(sortRequirementsByCreatedAt(requirements).map((item) => item.id), ['req-300', 'req-200', 'req-100']);
+});
+
+test('uses id/code fallback when legacy requirements only have the same date', () => {
+  const requirements = [
+    req('req-1782301644000', 'REQ-010', '2026-06-24'),
+    req('req-1782301644789', 'REQ-011', '2026-06-24'),
+    req('req-old', 'REQ-009', '2026-06-24'),
+  ];
+
+  assert.deepEqual(sortRequirementsByCreatedAt(requirements).map((item) => item.id), [
+    'req-1782301644789',
+    'req-1782301644000',
+    'req-old',
+  ]);
+});
+
+test('can sort requirements by created time ascending', () => {
+  const requirements = [
+    req('req-300', 'REQ-003', '2026-06-29T09:00:00.000Z'),
+    req('req-100', 'REQ-001', '2026-06-28T09:00:00.000Z'),
+    req('req-200', 'REQ-002', '2026-06-28T18:00:00.000Z'),
+  ];
+
+  assert.deepEqual(sortRequirementsByCreatedAt(requirements, 'asc').map((item) => item.id), ['req-100', 'req-200', 'req-300']);
+});