feat: 版本详情完整功能 + 数据串联 + 登录模块

- 版本详情：关联需求Tab（从需求池添加已采纳需求/移除释放）
- 版本详情：调研/产品方案/UI设计Tab（计划CRUD、完成提交成果、耗时统计）
- 版本详情：超期校验（结束日期超版本截止需填写原因）
- 版本详情：概览统计卡片（加班时长/排名/原因占比）
- 数据串联：产品→项目→版本→需求→加班全链路贯通
- 版本管理：规划中版本可删除，删除释放关联需求
- 数据清理：仅保留翻台宝/值班，需求池10条值班待评审需求
- 修复：列表页overflow裁剪菜单问题（4个页面统一修复）
- 新增：登录模块、AuthGuard、VersionPlan store

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/stores/useVersionPlanStore.ts

@@ -0,0 +1,62 @@
+'use client';
+import { create } from 'zustand';
+import type { VersionPlan, PlanType } from '@/lib/version-plan';
+
+const STORAGE_KEY = 'ftb_version_plans_v1';
+
+const MOCK_PLANS: VersionPlan[] = [];
+
+function saveLocal(plans: VersionPlan[]) {
+  try { localStorage.setItem(STORAGE_KEY, JSON.stringify(plans)); } catch {}
+}
+
+function loadLocal(): VersionPlan[] | null {
+  try {
+    const raw = localStorage.getItem(STORAGE_KEY);
+    if (raw) return JSON.parse(raw);
+  } catch {}
+  return null;
+}
+
+interface VersionPlanState {
+  plans: VersionPlan[];
+  fetchPlans: () => void;
+  createPlan: (data: Omit<VersionPlan, 'id' | 'createdAt'>) => void;
+  updatePlan: (id: string, data: Partial<VersionPlan>) => void;
+  completePlan: (id: string, result: { resultType: 'link' | 'file'; resultUrl?: string; resultFileName?: string; resultFileData?: string }) => void;
+  deletePlan: (id: string) => void;
+}
+
+export const useVersionPlanStore = create<VersionPlanState>((set, get) => ({
+  plans: MOCK_PLANS,
+
+  fetchPlans: () => {
+    const cached = loadLocal();
+    if (cached) set({ plans: cached });
+  },
+
+  createPlan: (data) => {
+    const plan: VersionPlan = { ...data, id: `plan-${Date.now()}`, createdAt: new Date().toISOString().slice(0, 10) };
+    const plans = [...get().plans, plan];
+    set({ plans });
+    saveLocal(plans);
+  },
+
+  updatePlan: (id, data) => {
+    const plans = get().plans.map((p) => p.id === id ? { ...p, ...data } : p);
+    set({ plans });
+    saveLocal(plans);
+  },
+
+  completePlan: (id, result) => {
+    const plans = get().plans.map((p) => p.id === id ? { ...p, ...result, status: 'completed' as const, completedAt: new Date().toISOString() } : p);
+    set({ plans });
+    saveLocal(plans);
+  },
+
+  deletePlan: (id) => {
+    const plans = get().plans.filter((p) => p.id !== id);
+    set({ plans });
+    saveLocal(plans);
+  },
+}));