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.ts

@@ -0,0 +1,39 @@
+import type { Requirement } from './requirement';
+
+export type RequirementDateSort = 'desc' | 'asc';
+
+export function sortRequirementsByCreatedAt(
+  requirements: Requirement[],
+  direction: RequirementDateSort = 'desc',
+): Requirement[] {
+  const multiplier = direction === 'asc' ? 1 : -1;
+  return [...requirements].sort((a, b) => compareRequirementCreatedAt(a, b) * multiplier);
+}
+
+function compareRequirementCreatedAt(a: Requirement, b: Requirement): number {
+  const createdAtDiff = toTimestamp(a.createdAt) - toTimestamp(b.createdAt);
+  if (createdAtDiff !== 0) return createdAtDiff;
+
+  const idDiff = trailingNumber(a.id) - trailingNumber(b.id);
+  if (idDiff !== 0) return idDiff;
+
+  const codeDiff = trailingNumber(a.code) - trailingNumber(b.code);
+  if (codeDiff !== 0) return codeDiff;
+
+  const codeTextDiff = a.code.localeCompare(b.code);
+  if (codeTextDiff !== 0) return codeTextDiff;
+
+  return a.id.localeCompare(b.id);
+}
+
+function toTimestamp(value: string): number {
+  const timestamp = new Date(value).getTime();
+  return Number.isFinite(timestamp) ? timestamp : 0;
+}
+
+function trailingNumber(value: string): number {
+  const matches = value.match(/\d+/g);
+  if (!matches) return 0;
+  const numericValue = Number(matches[matches.length - 1]);
+  return Number.isFinite(numericValue) ? numericValue : 0;
+}