feat(popup): 重做扩展云同步中心与项目文档

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
feat(ui): 重构页面面板并增强抓取缓存与下载交互
2026-03-18 00:28:14 +08:00 · 2026-03-18 00:27:52 +08:00 · 2026-03-18 00:27:27 +08:00 · 2026-03-18 00:27:04 +08:00 · 2026-03-11 19:23:27 +08:00 · 2026-03-11 19:17:30 +08:00
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+node_modules/
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+.env
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+# 涩花塘磁力助手 - 项目架构与部署说明
+
+> 更新时间：2026-03-14  
+> 说明：本文档描述当前项目的整体架构、核心数据流、缓存策略、云同步设计、线上部署信息（**不包含任何敏感凭据**），以及当前已知问题与优化方向。
+
+---
+
+## 1. 项目概览
+
+本项目由两部分组成：
+
+1. **Chrome 扩展端**  
+   负责在涩花塘论坛页面中：
+   - 识别列表页 / 帖子页
+   - 批量抓取帖子与磁力链接
+   - 本地缓存帖子、范围快照、页快照、磁力结果
+   - 展示搜索结果、缓存总览、收藏夹、云同步入口
+
+2. **云端共享缓存服务**  
+   负责：
+   - 共享线程缓存（shared thread cache）
+   - 共享范围缓存（shared coverage cache）
+   - 共享页缓存（shared page cache）
+   - 覆盖规划（coverage planning）
+   - 私有保险柜（vault）
+   - 账号注册 / 登录 / 鉴权
+
+---
+
+## 2. 目录结构
+
+### 扩展端根目录
+
+- `manifest.json`：Chrome 扩展清单（MV3）
+- `content.js`：内容脚本，挂载 UI、执行抓取、合并缓存、结果展示
+- `background.js`：Service Worker，负责 IndexedDB、本地状态、云接口、跨页请求
+- `popup.html` / `popup.js`：扩展独立云同步中心 + 快捷复制入口
+
+### 服务端目录
+
+- `server/package.json`：服务端依赖与脚本
+- `server/src/index.js`：Fastify 入口
+- `server/src/config.js`：环境变量配置
+- `server/src/db.js`：MySQL 连接池
+- `server/src/redis.js`：Redis 连接与 JSON 缓存
+- `server/src/crypto.js`：AES-GCM 加密与哈希
+- `server/src/auth.js`：认证辅助逻辑
+- `server/src/routes/auth.js`：注册 / 登录 / me / logout
+- `server/src/routes/vault.js`：私有保险柜 push / pull
+- `server/src/routes/shared-cache.js`：共享缓存查找 / 写入 / coverage planning
+- `server/sql/001_init.sql`：数据库初始化表结构
+
+---
+
+## 3. 扩展端架构
+
+### 3.1 页面层（content.js）
+
+`content.js` 负责：
+
+- 判断当前页面是：
+  - 列表页（forumdisplay / forum-x-y.html / normalthread tbody）
+  - 帖子页（thread-xxx / tid=xxx）
+- 创建浮动面板 UI
+- 管理：
+  - 关键词搜索
+  - 页码范围
+  - 速度模式
+  - 结果列表
+  - 收藏页
+  - 缓存页
+  - 云同步页入口
+- 调用后台：
+  - 读取 / 保存本地缓存
+  - 读取 / 保存进度状态
+  - 触发云同步相关动作
+
+### 3.2 后台层（background.js）
+
+`background.js` 是当前项目的核心调度层，负责：
+
+- IndexedDB 缓存存取
+- 云缓存接口调用
+- 共享缓存 planning 调用
+- 上传抑制（hash 去重 + TTL 节流）
+- 本地历史缓存回填到云端
+- 私有保险柜加解密
+- 云账号登录状态维护
+
+### 3.3 本地存储层
+
+当前本地存储分三类：
+
+1. **IndexedDB（结构化缓存）**
+   - `threads`
+   - `coverages`
+   - `pageCoverages`
+
+2. **chrome.storage.local（扩展私有存储）**
+   - 收藏夹
+   - 搜索历史
+   - 云同步状态
+   - 上传元数据去重表
+   - 进度状态
+
+3. **运行时内存态**
+   - 当前抓取状态
+   - session backup 临时状态
+
+---
+
+## 4. 服务端架构
+
+### 4.1 服务端职责
+
+云服务现在不仅是“存数据”，还承担：
+
+- 共享缓存存储
+- 去重写入
+- coverage planning
+- Redis 缓存 planning 结果
+- 账号认证
+- 私有保险柜同步
+
+### 4.2 路由职责
+
+#### 认证
+- `POST /api/auth/register`
+- `POST /api/auth/login`
+- `GET /api/auth/me`
+- `POST /api/auth/logout`
+
+#### 私有保险柜
+- `POST /api/vault/push`
+- `POST /api/vault/pull`
+
+#### 共享缓存
+- `POST /api/shared-cache/threads/lookup`
+- `POST /api/shared-cache/threads/upsert`
+- `POST /api/shared-cache/coverages/lookup`
+- `POST /api/shared-cache/coverages/upsert`
+- `POST /api/shared-cache/pages/lookup`
+- `POST /api/shared-cache/pages/upsert`
+- `POST /api/shared-cache/coverages/plan`
+
+#### 健康检查
+- `GET /health`
+- `GET /ready`
+
+---
+
+## 5. 本地缓存模型
+
+### 5.1 `threads`
+存储唯一帖子级信息：
+
+- `forumKey`
+- `threadKey`
+- `url`
+- `title`
+- `lastSeenAt`
+- `magnets`
+- `lastMagnetSyncAt`
+
+特点：
+- 同一板块 + 同一帖子只保留一份
+- 线程磁链缓存优先从这里命中
+
+### 5.2 `coverages`
+存储范围级快照：
+
+- `forumKey`
+- `startPage`
+- `endPage`
+- `strategy`
+- `frontRefreshPages`
+- `threadKeys`
+
+特点：
+- 表示某个页范围对应的帖子集合
+- 用于 exact coverage / shifted coverage / 历史 coverage 碎片复用
+
+### 5.3 `pageCoverages`
+存储页级快照：
+
+- `forumKey`
+- `page`
+- `threadKeys`
+
+特点：
+- 用来组装连续页块
+- 当前大范围命中优化的重要基础
+
+---
+
+## 6. 云端缓存模型
+
+### 6.1 共享线程缓存 `shared_thread_cache`
+- 唯一键：`(forum_key, thread_key)`
+- 数据库存储加密：AES-GCM
+- 用于跨用户复用帖子级磁链结果
+
+### 6.2 共享范围缓存 `shared_coverage_cache`
+- 唯一键：`(forum_key, start_page, end_page, strategy)`
+- 用于整段范围的覆盖规划
+
+### 6.3 共享页缓存 `shared_page_cache`
+- 唯一键：`(forum_key, page)`
+- 用于连续页块拼装
+
+### 6.4 私有保险柜 `vault_items`
+- 用户级密文存储
+- 当前用于：
+  - 收藏夹
+  - 搜索历史
+  - UI 设置
+  - 进度状态
+
+---
+
+## 7. 抓取流程（当前实际运行路径）
+
+### 7.1 点击“开始获取”后的流程
+
+1. 读取页码范围 / 关键词 / 速度配置
+2. 构建 `searchContext`
+3. 显示：
+   - `正在规划缓存：检查本地缓存 / 云端规划 / 复用块...`
+4. 调用 `getCachedCoveragePlan(...)`
+5. 依次判断：
+   - exact coverage
+   - assembled page coverage
+   - 服务端 planning
+   - cachedBlocks
+   - shiftedCoverage
+6. 对缺口区间执行 live 抓取
+7. 结果与缓存合并后，再写回本地与云端
+
+### 7.2 实际搜索执行路径
+
+主要函数：
+
+- `fetchFromPage(...)`
+- `fetchLivePageRange(...)`
+- `processCachedThreadBatch(...)`
+- `applyCachedMagnetHits(...)`
+
+---
+
+## 8. 去重与上传抑制策略
+
+### 8.1 本地去重
+
+- 线程去重：`normalizeCachedThreads()`
+- 磁链去重：`normalizeMagnetList()`
+- coverage 合并去重：`mergeCoverageThreads()`
+- coverage 保存前合并：`mergeCoverageThreadLists()`
+
+### 8.2 云端去重
+
+数据库唯一索引 + `ON DUPLICATE KEY UPDATE`
+
+### 8.3 上传抑制
+
+本地维护 upload meta：
+
+- `threads`
+- `coverages`
+- `pages`
+
+每类记录：
+- `payloadHash`
+- `lastUploadedAt`
+
+TTL：
+
+- 线程：10 分钟
+- 页：30 分钟
+- 范围：60 分钟
+
+作用：
+- 降低重复上传
+- 降低重复加密
+- 降低数据库写入压力
+
+---
+
+## 9. 当前“智能更新”逻辑
+
+### 已实现
+
+1. front refresh（从第一页开始时可刷新前段）
+2. shiftedCoverage 复用
+3. page cache block 复用
+4. intersecting coverage fragments 复用
+5. 服务端 coverage planning
+6. Redis 缓存 planning 结果
+
+### 当前仍不够理想的点
+
+1. **thread cache 很多，但未完全反向沉淀成 page/coverage 索引**  
+   这会导致“明明有很多历史线程缓存，但大范围规划不够聪明”。
+
+2. **coverage 合并仍然偏保守**  
+   少量前页更新后，虽然已经补了历史 coverage 合并，但仍建议继续增强“旧帖保留连续性”。
+
+3. **前段刷新策略仍是经验型策略**  
+   当前已从“固定刷新前 20 页”改为“前面没有缓存覆盖才刷新”，但仍属于启发式策略。
+
+4. **启动前规划仍然是同步等待**  
+   现在已经加了状态提示，但未来可以做：
+   - 本地快速规划优先
+   - 云端规划异步补充
+
+---
+
+## 10. 线上部署信息（不含敏感凭据）
+
+### 服务器基础信息
+
+- 公网 IP：`47.238.173.98`
+- 域名：`s.52oai.com`
+- 系统：CentOS 7（当前会话已确认）
+- 部署方式：Nginx + PM2 + Node.js + MySQL + Redis
+- 面板：宝塔面板（BT Panel）
+
+### 当前服务端组成
+
+- Nginx：反向代理入口
+- Node 服务：`magnet-cloud-cache`
+- PM2：进程守护
+- MySQL：主数据存储
+- Redis：coverage planning 结果缓存
+
+### 线上访问入口
+
+- `https://s.52oai.com/health`
+- `https://s.52oai.com/ready`
+
+### Redis 状态
+
+当前已验证：
+
+- Redis 可连接
+- 可写入/读取 JSON
+- coverage planning key 已落库
+
+---
+
+## 11. 当前安全边界
+
+### 已完成的安全改造
+
+1. 云同步登录/注册 UI 已迁移到扩展独立页面
+2. 收藏/搜索历史已迁移到扩展私有存储
+3. session 进度备份已不再依赖页面 `sessionStorage`
+4. shared-cache 写接口已加写入令牌鉴权
+5. shared-cache 已避免旧写覆盖新写
+
+### 仍建议后续加强
+
+1. `vaultKeyBase64` 改为 session-only
+2. auth/vault/shared-cache 更细粒度限流
+3. 服务端请求体大小再收紧
+4. 共享缓存写审计日志
+
+---
+
+## 12. 当前最值得继续优化的方向
+
+### P1 - 正确性优先
+
+1. **thread cache 反向沉淀成 page/coverage 索引**  
+   这是目前提升“大范围缓存命中率”的最高价值项。
+
+2. **coverage 合并策略继续增强**  
+   尤其是前段少量更新后，历史旧帖不应被挤出当前范围搜索。
+
+3. **规划器结果可观测化**  
+   建议增加 debug summary：
+   - 命中 exact coverage
+   - 命中 page blocks 数
+   - 命中 intersecting coverage 数
+   - 实际缺口页数
+
+### P2 - 性能优先
+
+1. 本地快速规划优先，云端 planning 异步补充
+2. planning 结果本地短时缓存
+3. 回填队列分批化
+
+---
+
+## 12.1 当前抓取合并 / 去重 / 智能更新逻辑复盘
+
+### 一、当前逻辑里已经做对的部分
+
+1. **线程级去重已经明确**  
+   - 本地通过 `threadKey` 去重  
+   - 云端通过 `(forum_key, thread_key)` 唯一约束去重
+
+2. **磁链级去重已经明确**  
+   - 本地通过 `normalizeMagnetList()` 去重  
+   - 云端共享缓存目前按线程保存，磁链集合在单线程内部去重
+
+3. **coverage 规划已经从“只看精确范围”进化为多层来源**  
+   当前 `getCachedCoveragePlan()` 已经综合：
+   - exact coverage
+   - assembled page coverage
+   - 服务端 planning
+   - cachedBlocks（页块）
+   - intersecting coverages（相交范围碎片）
+   - shiftedCoverage
+
+4. **上传抑制已经开始发挥作用**  
+   - thread/page/coverage 都有 upload meta
+   - hash + TTL 可以减少重复上云
+
+### 二、当前逻辑不够理想的核心点
+
+#### 1. 线程缓存与页/范围索引仍然是“半脱节”
+
+这是目前最关键的问题：
+
+- `threads` 里可能已经积累了大量帖子与磁链
+- 但这些历史数据没有系统性地回灌成：
+  - `pageCoverages`
+  - `coverages`
+
+结果就是：
+
+> 看起来缓存很多，但真正能参与“大范围规划”的缓存块不够多。
+
+#### 2. 智能更新仍然偏启发式，而不是差异驱动
+
+当前 front refresh / shiftedCoverage 还是基于：
+
+- 从第 1 页开始时，倾向刷新前段
+- 历史范围快照的最近性
+
+但它缺少真正的：
+
+- 基于“帖子是否变化”的差异判断
+- 基于线程游标 / 内容指纹 / 页指纹 的更新模型
+
+#### 3. coverage 合并虽然已经补强，但仍然不够结构化
+
+当前已经补了：
+
+- 保存新 coverage 前，合并历史相交 coverage 的线程
+
+但这个策略仍是：
+
+- 按线程集合合并
+- 不是按“真实页结构”或“线程页位置偏移”合并
+
+所以在论坛前段轻微更新时，仍可能出现：
+
+- 范围快照连续性不足
+- 旧帖可见性波动
+
+#### 4. 服务端 planning 已加入，但仍然是“辅助规划器”
+
+现在服务端已经能返回：
+
+- `exactCoverage`
+- `cachedBlocks`
+- `shiftedCoverage`
+
+但扩展端仍保留了大量本地规划逻辑，导致：
+
+- 本地规划与服务端规划并存
+- 逻辑复杂度上升
+- 调试成本高
+
+### 三、当前最值得优先继续优化的技术方向
+
+#### A. `threads -> pageCoverages / coverages` 反向沉淀
+
+这是正确性和命中率的第一优先级优化。
+
+目标：
+
+- 当系统手里已经有大量 thread cache 时
+- 能定期 / 按需将其重建为：
+  - page coverage block
+  - coverage fragment
+
+收益：
+
+- “缓存明明很多却命中不上”的问题会明显缓解
+
+#### B. 引入“线程或页面指纹”作为智能更新依据
+
+例如：
+
+- 页面线程列表 hash
+- 范围线程集合 hash
+- 线程集合版本号
+
+这样 front refresh 就能从“经验刷新”变成：
+
+- 先比对指纹
+- 只有前段真的变化才刷新
+
+#### C. 最终把 planning 统一到服务端主导
+
+建议目标不是“双规划器”，而是：
+
+- 服务端负责 coverage planning
+- 扩展端只负责执行计划
+- 本地逻辑只保留兜底回退
+
+这样架构会明显更稳。
+
+### P3 - 运维优先
+
+1. 共享缓存保留策略 / 归档策略
+2. 写入审计与异常监控
+3. 密钥轮换机制
+
+---
+
+## 13. 当前版本的整体评价
+
+### 已经具备的能力
+
+- 本地线程 / 范围 / 页缓存
+- 云端共享缓存
+- 私有保险柜
+- 上传抑制与 TTL 节流
+- coverage planning + Redis planning cache
+- 扩展端 UI / 云同步中心 / 收藏 / 搜索历史
+
+### 当前最核心的短板
+
+> 缓存数据已经很多，但“如何把这些缓存组织成最优复用计划”仍然不够强。
+
+也就是说，当前系统最难的不是“存缓存”，而是：
+
+> **把已有缓存规划成正确、完整、连续的搜索路径**
+
+---
+
+## 14. 文档使用建议
+
+如果后续你继续迭代项目，建议把本文档当成：
+
+1. **新人接手说明**
+2. **线上部署说明**
+3. **缓存/同步逻辑总览**
+4. **后续重构路线图**
+
+---
+
+## 15. 敏感信息说明
+
+本文档**不记录**以下信息：
+
+- SSH 密码
+- MySQL 密码
+- write token
+- 加密密钥
+- `.env` 明文内容
+
+这些信息应只保留在安全的部署环境与秘密管理系统中。
+
+---
+
+## 16. Chrome 分发与更新能力边界
+
+结合当前平台限制和架构评估，下面是**真实可行**与**不可行**的边界。
+
+### 16.1 对普通 Chrome 用户，不可直接做到的事
+
+以下能力在普通非企业托管 Chrome 中，**不现实或不受支持**：
+
+1. **从网站自动把扩展装进 Chrome**
+2. **通过主页密码后，静默安装 CRX**
+3. **普通用户使用自托管 CRX 自动更新**
+
+也就是说：
+
+> `s.52oai.com` 可以做“分发引导页”，但不能真正实现“输密码后自动装到 Chrome 里”。
+
+### 16.2 最现实的分发方式
+
+对于普通用户，最推荐：
+
+1. **发布到 Chrome Web Store（建议 unlisted）**
+2. `s.52oai.com` 做密码门禁页
+3. 门禁通过后展示：
+   - CWS 安装链接
+   - 安装说明
+   - 使用说明
+
+这样可以获得：
+
+- 官方安装路径
+- Chrome 自动更新
+- 最低用户支持成本
+
+### 16.3 自托管更新什么时候才成立
+
+只有在以下场景，自托管更新才是现实方案：
+
+- **企业托管 Chrome**
+- 管理员通过策略安装
+- 使用企业设备 / 组织统一管理浏览器
+
+这不是普通公网用户场景。
+
+### 16.4 当前项目建议的分发策略
+
+如果未来要正式分发，推荐顺序：
+
+1. **Chrome Web Store（最好 Unlisted）**
+2. `s.52oai.com` 做密码门禁与引导页
+3. 扩展内做“最低支持版本”检查
+4. 如果版本太低，则提示用户去商店更新
+
+### 16.5 站点密码的真实作用
+
+主页密码（例如 `123456`）只能充当：
+
+- 引导门槛
+- 简单访问控制
+- 降低无关访问
+
+但它**不能视为真正安全边界**。真正的权限控制仍然必须放在：
+
+- 后端账号系统
+- API 鉴权
+- 服务端授权逻辑
+
+
+---
+
+## 16. Chrome 分发与更新能力边界（部署到主页的现实约束）
+
+### 16.1 对普通 Chrome 用户，不能直接做到的事
+
+对于**普通、非企业托管**的 Chrome 用户，当前不支持：
+
+1. 从 `s.52oai.com` 网页直接自动安装扩展
+2. 从自有网站静默安装 CRX
+3. 对普通用户使用自托管 CRX 做自动更新
+
+也就是说：
+
+> 网站可以做“入口页 / 密码门禁页 / 引导页”，但不能真正代替 Chrome 官方安装渠道完成自动安装。
+
+### 16.2 对普通用户最现实的方案
+
+最可行方案是：
+
+1. 发布到 **Chrome Web Store（建议 Unlisted）**
+2. `s.52oai.com` 作为密码门禁页
+3. 输入密码后展示：
+   - Chrome Web Store 安装链接
+   - 使用说明
+   - 更新说明
+
+这样可以获得：
+
+- 标准安装体验
+- Chrome 自动更新
+- 最低的用户支持成本
+
+### 16.3 自托管自动更新什么时候可行
+
+只有在：
+
+- 企业托管 Chrome
+- 管理员策略安装
+- 受管设备/受管浏览器环境
+
+这种情况下，自托管 CRX + update manifest 才是现实路径。
+
+### 16.4 当前项目推荐的分发模式
+
+推荐顺序：
+
+1. **Chrome Web Store（Unlisted）** 作为主分发渠道
+2. `s.52oai.com` 做密码门禁 + 安装引导页
+3. 扩展内调用服务端 `/ext/config`（后续可实现）检查最低支持版本
+4. 如果版本过低，提示用户跳转到商店升级
+
+### 16.5 密码门禁的真实作用
+
+密码门禁只能起到：
+
+- 隐藏安装入口
+- 控制谁能看到链接
+
+但它**不能视为真正的安全边界**。真正的权限控制必须放在：
+
+- 后端账号体系
+- API token / 登录态
+- 服务器侧权限判断
--- a/background.js
+++ b/background.js
--- a/content.js
+++ b/content.js
--- a/manifest.json
+++ b/manifest.json
@@ -1,13 +1,14 @@
 {
  "manifest_version": 3,
  "name": "涩花塘磁力助手",
-  "version": "1.2",
-  "description": "一键获取当前页所有帖子的磁力链接",
+  "version": "1.3",
+  "description": "一键获取磁力链接 - 暗色科技风UI + 收藏夹 + 搜索历史 + 完成通知",
  "permissions": [
    "activeTab",
    "clipboardWrite",
    "storage",
-    "unlimitedStorage"
+    "unlimitedStorage",
+    "notifications"
  ],
  "host_permissions": [
    "http://sehuatang.net/*",
@@ -17,7 +18,9 @@
    "https://sehuatang.net/*",
    "https://www.sehuatang.net/*",
    "https://sehuatang.org/*",
-    "https://www.sehuatang.org/*"
+    "https://www.sehuatang.org/*",
+    "http://s.52oai.com/*",
+    "https://s.52oai.com/*"
  ],
  "content_scripts": [
    {
--- a/popup.html
+++ b/popup.html
@@ -1,27 +1,139 @@
 <!DOCTYPE html>
-<html>
+<html lang="zh-CN">
 <head>
+  <meta charset="UTF-8">
+  <title>磁力助手</title>
  <style>
-    body { width: 200px; padding: 15px; font-family: Arial; }
-    h3 { margin: 0 0 10px; font-size: 14px; }
-    p { font-size: 12px; color: #666; margin: 5px 0; }
-    button {
-      width: 100%;
-      padding: 8px;
-      background: #4CAF50;
-      color: white;
-      border: none;
-      border-radius: 4px;
-      cursor: pointer;
-      margin-top: 10px;
+    :root {
+      --m-bg-deep: #0a0e14;
+      --m-bg-primary: #0f1419;
+      --m-bg-secondary: #1a1f2e;
+      --m-bg-card: rgba(26, 31, 46, 0.92);
+      --m-accent: #00d4aa;
+      --m-accent-2: #00f5c4;
+      --m-danger: #ef4444;
+      --m-text-primary: #f0f4f8;
+      --m-text-secondary: #8892a4;
+      --m-text-muted: #5c6578;
+      --m-border: rgba(255,255,255,0.08);
+      --m-radius: 12px;
    }
-    button:hover { background: #45a049; }
+
+    * { box-sizing: border-box; }
+    body {
+      margin: 0;
+      min-width: 320px;
+      background: var(--m-bg-primary);
+      color: var(--m-text-primary);
+      font: 13px/1.5 "Microsoft YaHei", sans-serif;
+      padding: 18px;
+    }
+
+    .header { display:flex; align-items:flex-start; justify-content:space-between; gap:12px; margin-bottom:16px; }
+    .title { font-size: 18px; font-weight: 700; color: var(--m-accent); }
+    .subtitle { font-size: 11px; color: var(--m-text-secondary); }
+    .header-status { display:flex; flex-direction:column; align-items:flex-end; gap:6px; min-width:120px; }
+    .header-status .status { margin-top:0; }
+    .card {
+      background: var(--m-bg-card);
+      border: 1px solid var(--m-border);
+      border-radius: 16px;
+      padding: 14px;
+      margin-bottom: 12px;
+    }
+    .card-title { font-size: 13px; font-weight: 700; margin-bottom: 8px; }
+    .meta { color: var(--m-text-secondary); font-size: 12px; }
+    .row { display:flex; gap:8px; margin-top:10px; }
+    .col { display:flex; flex-direction:column; gap:10px; }
+    input {
+      width: 100%;
+      padding: 10px 12px;
+      border-radius: var(--m-radius);
+      border: 1px solid var(--m-border);
+      background: var(--m-bg-secondary);
+      color: var(--m-text-primary);
+      outline: none;
+    }
+    input:focus { border-color: var(--m-accent); }
+    button {
+      border: none;
+      border-radius: var(--m-radius);
+      padding: 10px 12px;
+      cursor: pointer;
+      font-weight: 700;
+    }
+    .primary { background: linear-gradient(135deg, var(--m-accent), var(--m-accent-2)); color: var(--m-bg-deep); }
+    .secondary { background: var(--m-bg-secondary); color: var(--m-text-primary); border: 1px solid var(--m-border); }
+    .danger { background: rgba(239,68,68,0.16); color: #ff8585; border: 1px solid rgba(239,68,68,0.25); }
+    .status { display:flex; align-items:center; gap:8px; margin-top:8px; }
+    .dot { width: 8px; height: 8px; border-radius:50%; background: var(--m-danger); box-shadow: 0 0 8px rgba(239,68,68,.35); }
+    .dot.ok { background:#10b981; box-shadow:0 0 8px rgba(16,185,129,.35); }
+    .small { font-size: 11px; color: var(--m-text-muted); }
+    .hidden { display:none; }
  </style>
 </head>
 <body>
-  <h3>磁力链接复制助手</h3>
-  <p>在论坛页面提取当前页磁力链接并复制到剪贴板</p>
-  <button id="copyBtn">手动复制当前页面</button>
+  <div class="header">
+    <div>
+      <div class="title">MAGNET CLOUD</div>
+      <div class="subtitle">扩展独立云同步中心</div>
+    </div>
+    <div class="header-status">
+      <div class="status"><span id="accountDot" class="dot"></span><span id="accountText" class="meta">账号状态加载中</span></div>
+      <div class="status"><span id="serverDot" class="dot"></span><span id="serverText" class="meta">服务器状态加载中</span></div>
+      <div id="syncEmail" class="small"></div>
+    </div>
+  </div>
+
+  <div class="card col">
+    <div class="card-title">云端状态看板</div>
+    <div id="cloudStatsSummary" class="meta">正在读取云端统计...</div>
+    <div id="cloudStatsLatest" class="small"></div>
+    <div id="cloudStatsTables" class="small"></div>
+  </div>
+
+  <div class="card col">
+    <div class="card-title">本地状态看板</div>
+    <div id="localStatsSummary" class="meta">正在读取本地统计...</div>
+    <div id="localStatsStorage" class="small"></div>
+    <div id="localStatsMeta" class="small"></div>
+  </div>
+
+  <div id="authLoggedOut" class="card col">
+    <div class="card-title">登录 / 注册</div>
+    <div class="meta">账号密码只会在扩展页面中输入，不再放在网页里。</div>
+    <input id="emailInput" type="text" placeholder="邮箱">
+    <input id="passwordInput" type="password" placeholder="密码，至少6位">
+    <div class="row">
+      <button id="loginBtn" class="primary" type="button">登录</button>
+      <button id="registerBtn" class="secondary" type="button">注册</button>
+    </div>
+  </div>
+
+  <div id="authLoggedIn" class="card col hidden">
+    <div class="card-title">已登录</div>
+    <div id="loggedInEmail" class="meta"></div>
+    <div class="row">
+      <button id="syncNowBtn" class="primary" type="button">立即同步</button>
+      <button id="logoutBtn" class="danger" type="button">退出登录</button>
+    </div>
+    <div id="syncProgressText" class="small"></div>
+  </div>
+
+  <div class="card col">
+    <div class="card-title">下载器推荐</div>
+    <div class="meta">如果点击磁力“下载”按钮没有反应，请先安装本地下载器。qBittorrent 更适合磁力资源，Motrix 更适合偏轻量的使用习惯。</div>
+    <div class="row">
+      <button id="downloadNode2Btn" class="primary" type="button">qB 节点2（推荐）</button>
+      <button id="downloadOfficialBtn" class="secondary" type="button">qB 官方节点</button>
+    </div>
+    <div class="row">
+      <button id="downloadMotrixBtn" class="secondary" type="button">Motrix 下载</button>
+    </div>
+    <div class="small">安装完成后，请确保 qBittorrent 已关联 magnet 磁力链接协议。</div>
+  </div>
+
+  <div id="message" class="small"></div>
  <script src="popup.js"></script>
 </body>
 </html>
--- a/popup.js
+++ b/popup.js
@@ -1,33 +1,277 @@
-document.getElementById('copyBtn').addEventListener('click', function() {
-  chrome.tabs.query({ active: true, currentWindow: true }, function(tabs) {
-    var activeTab = tabs && tabs[0];
-    if (!activeTab || typeof activeTab.id !== 'number') {
-      alert('未找到当前标签页');
-      return;
-    }
-
-    chrome.tabs.sendMessage(activeTab.id, { action: 'getMagnets' }, function(response) {
+function sendMessageToBackground(message) {
+  return new Promise(function(resolve, reject) {
+    chrome.runtime.sendMessage(message, function(response) {
      if (chrome.runtime.lastError) {
-        alert('当前页面不支持，请在涩花塘论坛页面使用');
+        reject(new Error(chrome.runtime.lastError.message));
        return;
      }
-
-      var magnets = response && Array.isArray(response.magnets) ? response.magnets : [];
-      magnets = Array.from(new Set(magnets));
-
-      if (magnets.length === 0) {
-        alert('当前页面未找到磁力链接');
-        return;
-      }
-
-      navigator.clipboard.writeText(magnets.join('\n'))
-        .then(function() {
-          alert('已复制 ' + magnets.length + ' 个磁力链接！');
-        })
-        .catch(function(err) {
-          var errorMsg = err && err.message ? err.message : '复制失败';
-          alert('复制失败：' + errorMsg);
-        });
+      resolve(response || null);
    });
  });
+}
+
+function setMessage(text, isError) {
+  var message = document.getElementById('message');
+  if (!message) return;
+  message.textContent = text || '';
+  message.style.color = isError ? '#ff8585' : '#8892a4';
+}
+
+var lastGoodCloudStats = null;
+var lastGoodSyncStatus = null;
+var syncProgressTimer = null;
+var lastServerHealthy = null;
+
+function wait(ms) {
+  return new Promise(function(resolve) {
+    setTimeout(resolve, ms);
+  });
+}
+
+function setSyncProgress(text) {
+  var el = document.getElementById('syncProgressText');
+  if (!el) return;
+  el.textContent = text || '';
+}
+
+function startSyncProgress(prefix) {
+  var startedAt = Date.now();
+  var dots = 0;
+  if (syncProgressTimer) {
+    clearInterval(syncProgressTimer);
+  }
+  setSyncProgress((prefix || '正在同步') + ' 0s');
+  syncProgressTimer = setInterval(function() {
+    dots = (dots + 1) % 4;
+    var suffix = new Array(dots + 1).join('.');
+    var elapsed = Math.max(0, Math.floor((Date.now() - startedAt) / 1000));
+    setSyncProgress((prefix || '正在同步') + suffix + ' ' + elapsed + 's');
+  }, 500);
+}
+
+function stopSyncProgress(text) {
+  if (syncProgressTimer) {
+    clearInterval(syncProgressTimer);
+    syncProgressTimer = null;
+  }
+  setSyncProgress(text || '');
+}
+
+function updateStatus(status) {
+  if (status && status.authenticated !== undefined) {
+    lastGoodSyncStatus = status;
+  }
+  var accountDot = document.getElementById('accountDot');
+  var accountText = document.getElementById('accountText');
+  var email = document.getElementById('syncEmail');
+  var loggedOut = document.getElementById('authLoggedOut');
+  var loggedIn = document.getElementById('authLoggedIn');
+  var loggedInEmail = document.getElementById('loggedInEmail');
+  var healthy = !!(status && status.color === 'green');
+  var authenticated = !!(status && status.authenticated);
+  if (accountDot) accountDot.classList.toggle('ok', healthy);
+  if (accountText) accountText.textContent = status && (status.accountText || status.text) ? (status.accountText || status.text) : '账号状态未知';
+  if (email) email.textContent = status && status.email ? ('账号：' + status.email) : '';
+  if (loggedOut) loggedOut.classList.toggle('hidden', authenticated);
+  if (loggedIn) loggedIn.classList.toggle('hidden', !authenticated);
+  if (loggedInEmail) loggedInEmail.textContent = status && status.email ? ('当前账号：' + status.email) : '当前账号：未知';
+}
+
+function updateServerStatus(ok, text) {
+  var serverDot = document.getElementById('serverDot');
+  var serverText = document.getElementById('serverText');
+  lastServerHealthy = !!ok;
+  if (serverDot) serverDot.classList.toggle('ok', !!ok);
+  if (serverText) serverText.textContent = text || (ok ? '服务器状态正常' : '服务器状态异常');
+}
+
+function formatDateTime(value) {
+  if (!value) return '暂无';
+  try {
+    var date = new Date(value);
+    if (Number.isNaN(date.getTime())) return String(value);
+    return date.toLocaleString('zh-CN');
+  } catch (error) {
+    return String(value);
+  }
+}
+
+function renderCloudStats(stats) {
+  var summary = document.getElementById('cloudStatsSummary');
+  var latest = document.getElementById('cloudStatsLatest');
+  var tables = document.getElementById('cloudStatsTables');
+  if (!summary || !latest || !tables) return;
+  if (!stats || !stats.ok) {
+    if (lastGoodCloudStats && lastGoodCloudStats.ok) {
+      updateServerStatus(true, '服务器状态正常（展示最近一次成功数据）');
+      summary.textContent = '云端状态暂时刷新失败，显示最近一次成功数据';
+      latest.textContent = '最近成功更新：线程 ' + formatDateTime(lastGoodCloudStats.latest.threads) + ' ｜ 范围 ' + formatDateTime(lastGoodCloudStats.latest.coverages) + ' ｜ 页缓存 ' + formatDateTime(lastGoodCloudStats.latest.pages);
+      tables.textContent = '上次空间占用：' + (Array.isArray(lastGoodCloudStats.tables) ? lastGoodCloudStats.tables.map(function(table) {
+        return table.tableName + ' ' + table.sizeMb + 'MB';
+      }).join(' ｜ ') : '暂无');
+      return;
+    }
+    updateServerStatus(false, '服务器状态暂时不可读');
+    summary.textContent = '暂时无法读取云端状态';
+    latest.textContent = '';
+    tables.textContent = '';
+    return;
+  }
+  updateServerStatus(true, '服务器状态正常');
+  lastGoodCloudStats = stats;
+  summary.textContent = '帖子索引 ' + stats.counts.threads + ' 条（含磁力 ' + (stats.counts.magnetThreads || 0) + ' 条）/ 页缓存 ' + stats.counts.pages + ' 条 / 范围缓存 ' + stats.counts.coverages + ' 条 / 用户 ' + stats.counts.users + ' 个 / 保险柜 ' + stats.counts.vaultItems + ' 条';
+  latest.textContent = '最近更新：线程 ' + formatDateTime(stats.latest.threads) + ' ｜ 范围 ' + formatDateTime(stats.latest.coverages) + ' ｜ 页缓存 ' + formatDateTime(stats.latest.pages);
+  tables.textContent = '空间占用：' + (Array.isArray(stats.tables) ? stats.tables.map(function(table) {
+    return table.tableName + ' ' + table.sizeMb + 'MB';
+  }).join(' ｜ ') : '暂无');
+}
+
+function formatBytes(bytes) {
+  var value = Number(bytes || 0);
+  if (!Number.isFinite(value) || value <= 0) return '0 B';
+  if (value < 1024) return value + ' B';
+  if (value < 1024 * 1024) return (value / 1024).toFixed(1) + ' KB';
+  if (value < 1024 * 1024 * 1024) return (value / 1024 / 1024).toFixed(2) + ' MB';
+  return (value / 1024 / 1024 / 1024).toFixed(2) + ' GB';
+}
+
+function renderLocalStats(stats) {
+  var summary = document.getElementById('localStatsSummary');
+  var storage = document.getElementById('localStatsStorage');
+  var meta = document.getElementById('localStatsMeta');
+  if (!summary || !storage || !meta) return;
+  if (!stats || !stats.ok) {
+    summary.textContent = '暂时无法读取本地状态';
+    storage.textContent = '';
+    meta.textContent = '';
+    return;
+  }
+  summary.textContent = '帖子索引 ' + stats.counts.threads + ' 条（含磁力 ' + (stats.counts.magnetThreads || 0) + ' 条）/ 页缓存 ' + stats.counts.pages + ' 条 / 范围缓存 ' + stats.counts.coverages + ' 条 / 收藏 ' + stats.counts.favorites + ' 条 / 历史 ' + stats.counts.history + ' 条';
+  storage.textContent = '本地存储占用：' + formatBytes(stats.storage.usage) + ' / ' + formatBytes(stats.storage.quota);
+  meta.textContent = '上传抑制元数据：线程 ' + stats.counts.uploadMetaThreads + ' 条 ｜ 范围 ' + stats.counts.uploadMetaCoverages + ' 条 ｜ 页 ' + stats.counts.uploadMetaPages + ' 条';
+}
+
+async function refreshStatus() {
+  try {
+    var response = await sendMessageToBackground({ action: 'cloudGetSyncStatus' });
+    if (response && response.ok !== false) {
+      updateStatus(response || { color: 'red', text: '状态未知', authenticated: false });
+      return;
+    }
+    if (lastGoodSyncStatus) {
+      updateStatus(lastGoodSyncStatus);
+      setMessage('云同步状态暂时刷新失败，显示最近一次成功状态', true);
+      return;
+    }
+    updateStatus({ color: 'red', text: '云同步异常', authenticated: false, email: '' });
+  } catch (error) {
+    if (lastGoodSyncStatus) {
+      updateStatus(lastGoodSyncStatus);
+      setMessage('云同步状态暂时刷新失败，显示最近一次成功状态', true);
+      return;
+    }
+    updateStatus({ color: 'red', text: '云同步异常', authenticated: false, email: '' });
+    setMessage('状态获取失败：' + error.message, true);
+  }
+}
+
+async function refreshCloudStats() {
+  var attempts = 0;
+  var response = null;
+  var error = null;
+  for (attempts = 0; attempts < 3; attempts++) {
+    try {
+      response = await sendMessageToBackground({ action: 'cloudGetCacheStats' });
+      if (response && response.ok) {
+        renderCloudStats(response);
+        return;
+      }
+    } catch (err) {
+      error = err;
+    }
+    await wait(500 * (attempts + 1));
+  }
+  renderCloudStats(null);
+  if (error) {
+    setMessage('云端状态暂时刷新失败，稍后会自动重试', true);
+  }
+}
+
+async function refreshLocalStats() {
+  try {
+    var response = await sendMessageToBackground({ action: 'localGetCacheStats' });
+    renderLocalStats(response);
+  } catch (error) {
+    renderLocalStats(null);
+  }
+}
+
+async function submitAuth(action) {
+  var emailInput = document.getElementById('emailInput');
+  var passwordInput = document.getElementById('passwordInput');
+  var email = emailInput ? emailInput.value.trim() : '';
+  var password = passwordInput ? passwordInput.value : '';
+  if (!email || !password) {
+    setMessage('请输入邮箱和密码', true);
+    return;
+  }
+  setMessage(action === 'cloudRegister' ? '正在注册...' : '正在登录...', false);
+  try {
+    var response = await sendMessageToBackground({ action: action, email: email, password: password });
+    if (!response || !response.ok) {
+      setMessage((action === 'cloudRegister' ? '注册失败：' : '登录失败：') + (response && response.error ? response.error : '未知错误'), true);
+      return;
+    }
+    if (passwordInput) passwordInput.value = '';
+    updateStatus(response.status || { color: 'green', text: '云同步正常', authenticated: true, email: email });
+    setMessage(action === 'cloudRegister' ? '注册成功，云同步已开启' : '登录成功，云同步已开启', false);
+  } catch (error) {
+    setMessage((action === 'cloudRegister' ? '注册失败：' : '登录失败：') + error.message, true);
+  }
+}
+
+async function syncNow() {
+  setMessage('', false);
+  startSyncProgress('正在同步本地缓存到云端');
+  try {
+    await sendMessageToBackground({ action: 'cloudBackfillLocalCache', force: true });
+    stopSyncProgress('已提交同步任务，正在刷新状态...');
+    await wait(1200);
+    startSyncProgress('正在刷新云端状态');
+    await refreshStatus();
+    await refreshCloudStats();
+    await refreshLocalStats();
+    stopSyncProgress('同步完成');
+    setMessage('已触发云端回填', false);
+  } catch (error) {
+    stopSyncProgress('同步失败');
+    setMessage('同步失败：' + error.message, true);
+  }
+}
+
+async function logout() {
+  try {
+    await sendMessageToBackground({ action: 'cloudLogout' });
+    await refreshStatus();
+    setMessage('已退出登录', false);
+  } catch (error) {
+    setMessage('退出失败：' + error.message, true);
+  }
+}
+
+function openExternalUrl(url) {
+  chrome.tabs.create({ url: url });
+}
+
+document.addEventListener('DOMContentLoaded', function() {
+  document.getElementById('loginBtn').addEventListener('click', function() { submitAuth('cloudLogin'); });
+  document.getElementById('registerBtn').addEventListener('click', function() { submitAuth('cloudRegister'); });
+  document.getElementById('syncNowBtn').addEventListener('click', syncNow);
+  document.getElementById('logoutBtn').addEventListener('click', logout);
+  document.getElementById('downloadNode2Btn').addEventListener('click', function() { openExternalUrl('http://7.haory.cn/x/x72/qBittorrent_5.1.4_x64_setup.exe'); });
+  document.getElementById('downloadOfficialBtn').addEventListener('click', function() { openExternalUrl('https://sourceforge.net/projects/qbittorrent/files/qbittorrent-win32/qbittorrent-5.1.4/qbittorrent_5.1.4_x64_setup.exe/download'); });
+  document.getElementById('downloadMotrixBtn').addEventListener('click', function() { openExternalUrl('http://7.haory.cn/x/x72/Motrix-Setup-1.8.19.exe'); });
+  refreshStatus();
+  refreshCloudStats();
+  refreshLocalStats();
 });
--- a/server/.env.example
+++ b/server/.env.example
@@ -0,0 +1,14 @@
+PORT=3200
+HOST=127.0.0.1
+LOG_LEVEL=info
+
+MYSQL_HOST=127.0.0.1
+MYSQL_PORT=3306
+MYSQL_USER=magnet_app
+MYSQL_PASSWORD=change_me
+MYSQL_DATABASE=magnet_cloud
+
+APP_ENCRYPTION_SECRET=change_this_to_a_long_random_secret
+SHARED_CACHE_WRITE_TOKEN=change_this_to_a_long_random_write_token
+REDIS_URL=redis://127.0.0.1:6379
+REDIS_ENABLED=true
--- a/server/README.md
+++ b/server/README.md
@@ -0,0 +1,27 @@
+# Magnet Cloud Cache Server
+
+共享缓存池后端最小骨架：
+
+- Fastify 4
+- MySQL 5.7+/8.0+
+- AES-256-GCM 数据库存储加密
+- 共享线程缓存 / 范围缓存 / 页缓存
+- 为未来账号体系和私有保险箱预留表结构
+
+## 快速启动
+
+1. 复制 `.env.example` 为 `.env`
+2. 填好 MySQL 和加密密钥
+3. 安装依赖：`npm install`
+4. 启动：`npm start`
+
+## 已实现接口
+
+- `GET /health`
+- `GET /ready`
+- `POST /api/shared-cache/threads/lookup`
+- `POST /api/shared-cache/threads/upsert`
+- `POST /api/shared-cache/coverages/lookup`
+- `POST /api/shared-cache/coverages/upsert`
+- `POST /api/shared-cache/pages/lookup`
+- `POST /api/shared-cache/pages/upsert`
--- a/server/package-lock.json
+++ b/server/package-lock.json
@@ -0,0 +1,829 @@
+{
+  "name": "magnet-cloud-cache-server",
+  "version": "0.1.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "magnet-cloud-cache-server",
+      "version": "0.1.0",
+      "dependencies": {
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+        "@fastify/rate-limit": "^8.1.1",
+        "dotenv": "^16.4.5",
+        "fastify": "^4.29.0",
+        "mysql2": "^3.11.5",
+        "redis": "^4.7.0"
+      }
+    },
+    "node_modules/@fastify/ajv-compiler": {
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/@fastify/ajv-compiler/-/ajv-compiler-3.6.0.tgz",
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+      "license": "MIT",
+      "dependencies": {
+        "ajv": "^8.11.0",
+        "ajv-formats": "^2.1.1",
+        "fast-uri": "^2.0.0"
+      }
+    },
+    "node_modules/@fastify/cors": {
+      "version": "8.5.0",
+      "resolved": "https://registry.npmjs.org/@fastify/cors/-/cors-8.5.0.tgz",
+      "integrity": "sha512-/oZ1QSb02XjP0IK1U0IXktEsw/dUBTxJOW7IpIeO8c/tNalw/KjoNSJv1Sf6eqoBPO+TDGkifq6ynFK3v68HFQ==",
+      "license": "MIT",
+      "dependencies": {
+        "fastify-plugin": "^4.0.0",
+        "mnemonist": "0.39.6"
+      }
+    },
+    "node_modules/@fastify/error": {
+      "version": "3.4.1",
+      "resolved": "https://registry.npmjs.org/@fastify/error/-/error-3.4.1.tgz",
+      "integrity": "sha512-wWSvph+29GR783IhmvdwWnN4bUxTD01Vm5Xad4i7i1VuAOItLvbPAb69sb0IQ2N57yprvhNIwAP5B6xfKTmjmQ==",
+      "license": "MIT"
+    },
+    "node_modules/@fastify/fast-json-stringify-compiler": {
+      "version": "4.3.0",
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+      "license": "MIT",
+      "dependencies": {
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+      }
+    },
+    "node_modules/@fastify/merge-json-schemas": {
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+      }
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+      "license": "MIT",
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+      "resolved": "https://registry.npmjs.org/secure-json-parse/-/secure-json-parse-2.7.0.tgz",
+      "integrity": "sha512-6aU+Rwsezw7VR8/nyvKTx8QpWH9FrcYiXXlqC4z5d5XQBDRqtbfsRjnwGyqbi3gddNtWHuEk9OANUotL26qKUw==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/semver": {
+      "version": "7.7.4",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.7.4.tgz",
+      "integrity": "sha512-vFKC2IEtQnVhpT78h1Yp8wzwrf8CM+MzKMHGJZfBtzhZNycRFnXsHk6E5TxIkkMsgNS7mdX3AGB7x2QM2di4lA==",
+      "license": "ISC",
+      "bin": {
+        "semver": "bin/semver.js"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/set-cookie-parser": {
+      "version": "2.7.2",
+      "resolved": "https://registry.npmjs.org/set-cookie-parser/-/set-cookie-parser-2.7.2.tgz",
+      "integrity": "sha512-oeM1lpU/UvhTxw+g3cIfxXHyJRc/uidd3yK1P242gzHds0udQBYzs3y8j4gCCW+ZJ7ad0yctld8RYO+bdurlvw==",
+      "license": "MIT"
+    },
+    "node_modules/sonic-boom": {
+      "version": "4.2.1",
+      "resolved": "https://registry.npmjs.org/sonic-boom/-/sonic-boom-4.2.1.tgz",
+      "integrity": "sha512-w6AxtubXa2wTXAUsZMMWERrsIRAdrK0Sc+FUytWvYAhBJLyuI4llrMIC1DtlNSdI99EI86KZum2MMq3EAZlF9Q==",
+      "license": "MIT",
+      "dependencies": {
+        "atomic-sleep": "^1.0.0"
+      }
+    },
+    "node_modules/split2": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/split2/-/split2-4.2.0.tgz",
+      "integrity": "sha512-UcjcJOWknrNkF6PLX83qcHM6KHgVKNkV62Y8a5uYDVv9ydGQVwAHMKqHdJje1VTWpljG0WYpCDhrCdAOYH4TWg==",
+      "license": "ISC",
+      "engines": {
+        "node": ">= 10.x"
+      }
+    },
+    "node_modules/sql-escaper": {
+      "version": "1.3.3",
+      "resolved": "https://registry.npmjs.org/sql-escaper/-/sql-escaper-1.3.3.tgz",
+      "integrity": "sha512-BsTCV265VpTp8tm1wyIm1xqQCS+Q9NHx2Sr+WcnUrgLrQ6yiDIvHYJV5gHxsj1lMBy2zm5twLaZao8Jd+S8JJw==",
+      "license": "MIT",
+      "engines": {
+        "bun": ">=1.0.0",
+        "deno": ">=2.0.0",
+        "node": ">=12.0.0"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/mysqljs/sql-escaper?sponsor=1"
+      }
+    },
+    "node_modules/thread-stream": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/thread-stream/-/thread-stream-3.1.0.tgz",
+      "integrity": "sha512-OqyPZ9u96VohAyMfJykzmivOrY2wfMSf3C5TtFJVgN+Hm6aj+voFhlK+kZEIv2FBh1X6Xp3DlnCOfEQ3B2J86A==",
+      "license": "MIT",
+      "dependencies": {
+        "real-require": "^0.2.0"
+      }
+    },
+    "node_modules/tiny-lru": {
+      "version": "11.4.7",
+      "resolved": "https://registry.npmjs.org/tiny-lru/-/tiny-lru-11.4.7.tgz",
+      "integrity": "sha512-w/Te7uMUVeH0CR8vZIjr+XiN41V+30lkDdK+NRIDCUYKKuL9VcmaUEmaPISuwGhLlrTGh5yu18lENtR9axSxYw==",
+      "license": "BSD-3-Clause",
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/toad-cache": {
+      "version": "3.7.0",
+      "resolved": "https://registry.npmjs.org/toad-cache/-/toad-cache-3.7.0.tgz",
+      "integrity": "sha512-/m8M+2BJUpoJdgAHoG+baCwBT+tf2VraSfkBgl0Y00qIWt41DJ8R5B8nsEw0I58YwF5IZH6z24/2TobDKnqSWw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/undici-types": {
+      "version": "7.18.2",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.18.2.tgz",
+      "integrity": "sha512-AsuCzffGHJybSaRrmr5eHr81mwJU3kjw6M+uprWvCXiNeN9SOGwQ3Jn8jb8m3Z6izVgknn1R0FTCEAP2QrLY/w==",
+      "license": "MIT",
+      "peer": true
+    },
+    "node_modules/yallist": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
+      "license": "ISC"
+    }
+  }
+}
--- a/server/package.json
+++ b/server/package.json
@@ -0,0 +1,20 @@
+{
+  "name": "magnet-cloud-cache-server",
+  "version": "0.1.0",
+  "private": true,
+  "type": "commonjs",
+  "main": "src/index.js",
+  "scripts": {
+    "start": "node src/index.js",
+    "dev": "node src/index.js",
+    "check": "node --check src/index.js && node --check src/config.js && node --check src/db.js && node --check src/crypto.js && node --check src/auth.js && node --check src/routes/auth.js && node --check src/routes/vault.js && node --check src/routes/shared-cache.js"
+  },
+  "dependencies": {
+    "@fastify/cors": "^8.5.0",
+    "@fastify/rate-limit": "^8.1.1",
+    "dotenv": "^16.4.5",
+    "fastify": "^4.29.0",
+    "mysql2": "^3.11.5",
+    "redis": "^4.7.0"
+  }
+}
--- a/server/sql/001_init.sql
+++ b/server/sql/001_init.sql
@@ -0,0 +1,130 @@
+CREATE DATABASE IF NOT EXISTS magnet_cloud CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+USE magnet_cloud;
+
+CREATE TABLE IF NOT EXISTS users (
+  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
+  email VARCHAR(191) NOT NULL,
+  password_hash VARCHAR(255) NOT NULL,
+  status TINYINT NOT NULL DEFAULT 1,
+  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+  PRIMARY KEY (id),
+  UNIQUE KEY uk_users_email (email)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+CREATE TABLE IF NOT EXISTS devices (
+  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
+  user_id BIGINT UNSIGNED NOT NULL,
+  device_name VARCHAR(191) NOT NULL,
+  device_fingerprint VARCHAR(191) NOT NULL,
+  last_seen_at TIMESTAMP NULL DEFAULT NULL,
+  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  PRIMARY KEY (id),
+  UNIQUE KEY uk_devices_user_fp (user_id, device_fingerprint),
+  CONSTRAINT fk_devices_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+CREATE TABLE IF NOT EXISTS auth_tokens (
+  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
+  user_id BIGINT UNSIGNED NOT NULL,
+  token_hash CHAR(64) NOT NULL,
+  device_fingerprint VARCHAR(191) DEFAULT NULL,
+  expires_at TIMESTAMP NOT NULL,
+  last_seen_at TIMESTAMP NULL DEFAULT NULL,
+  revoked_at TIMESTAMP NULL DEFAULT NULL,
+  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  PRIMARY KEY (id),
+  UNIQUE KEY uk_auth_tokens_hash (token_hash),
+  KEY idx_auth_tokens_user (user_id),
+  KEY idx_auth_tokens_exp (expires_at),
+  CONSTRAINT fk_auth_tokens_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+CREATE TABLE IF NOT EXISTS user_keyrings (
+  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
+  user_id BIGINT UNSIGNED NOT NULL,
+  wrapped_dek TEXT NOT NULL,
+  kdf_salt VARCHAR(255) NOT NULL,
+  kdf_params JSON NULL,
+  key_version INT NOT NULL DEFAULT 1,
+  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  PRIMARY KEY (id),
+  UNIQUE KEY uk_user_keyrings_user (user_id),
+  CONSTRAINT fk_user_keyrings_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+CREATE TABLE IF NOT EXISTS vault_items (
+  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
+  user_id BIGINT UNSIGNED NOT NULL,
+  item_type VARCHAR(64) NOT NULL,
+  item_key VARCHAR(191) NOT NULL,
+  payload_ciphertext LONGTEXT NOT NULL,
+  payload_iv VARCHAR(64) NOT NULL,
+  payload_tag VARCHAR(64) NOT NULL,
+  payload_hash CHAR(64) NOT NULL,
+  key_version INT NOT NULL DEFAULT 1,
+  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+  PRIMARY KEY (id),
+  UNIQUE KEY uk_vault_user_item (user_id, item_type, item_key),
+  KEY idx_vault_user_type (user_id, item_type),
+  CONSTRAINT fk_vault_items_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+CREATE TABLE IF NOT EXISTS shared_thread_cache (
+  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
+  forum_key VARCHAR(128) NOT NULL,
+  thread_key VARCHAR(191) NOT NULL,
+  url_hash CHAR(64) NOT NULL,
+  title_hash CHAR(64) NOT NULL,
+  magnet_count INT NOT NULL DEFAULT 0,
+  payload_ciphertext LONGTEXT NOT NULL,
+  payload_iv VARCHAR(64) NOT NULL,
+  payload_tag VARCHAR(64) NOT NULL,
+  payload_hash CHAR(64) NOT NULL,
+  last_seen_at TIMESTAMP NULL DEFAULT NULL,
+  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+  PRIMARY KEY (id),
+  UNIQUE KEY uk_shared_thread (forum_key, thread_key),
+  KEY idx_shared_thread_seen (forum_key, last_seen_at),
+  KEY idx_shared_thread_hash (payload_hash)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+CREATE TABLE IF NOT EXISTS shared_coverage_cache (
+  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
+  forum_key VARCHAR(128) NOT NULL,
+  start_page INT NOT NULL,
+  end_page INT NOT NULL,
+  strategy VARCHAR(64) NOT NULL,
+  thread_count INT NOT NULL DEFAULT 0,
+  crawled_at TIMESTAMP NULL DEFAULT NULL,
+  payload_ciphertext LONGTEXT NOT NULL,
+  payload_iv VARCHAR(64) NOT NULL,
+  payload_tag VARCHAR(64) NOT NULL,
+  payload_hash CHAR(64) NOT NULL,
+  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+  PRIMARY KEY (id),
+  UNIQUE KEY uk_shared_coverage (forum_key, start_page, end_page, strategy),
+  KEY idx_shared_coverage_crawled (forum_key, crawled_at),
+  KEY idx_shared_coverage_hash (payload_hash)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+CREATE TABLE IF NOT EXISTS shared_page_cache (
+  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
+  forum_key VARCHAR(128) NOT NULL,
+  page INT NOT NULL,
+  thread_count INT NOT NULL DEFAULT 0,
+  crawled_at TIMESTAMP NULL DEFAULT NULL,
+  payload_ciphertext LONGTEXT NOT NULL,
+  payload_iv VARCHAR(64) NOT NULL,
+  payload_tag VARCHAR(64) NOT NULL,
+  payload_hash CHAR(64) NOT NULL,
+  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+  PRIMARY KEY (id),
+  UNIQUE KEY uk_shared_page (forum_key, page),
+  KEY idx_shared_page_crawled (forum_key, crawled_at),
+  KEY idx_shared_page_hash (payload_hash)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
--- a/server/src/auth.js
+++ b/server/src/auth.js
@@ -0,0 +1,146 @@
+const crypto = require('crypto');
+const db = require('./db');
+
+const TOKEN_TTL_DAYS = 30;
+
+function parseJsonMaybe(value) {
+  if (!value) {
+    return null;
+  }
+  if (typeof value === 'object') {
+    return value;
+  }
+  try {
+    return JSON.parse(value);
+  } catch (error) {
+    return null;
+  }
+}
+
+function sha256(value) {
+  return crypto.createHash('sha256').update(String(value || '')).digest('hex');
+}
+
+function randomToken(size) {
+  return crypto.randomBytes(size).toString('base64').replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/g, '');
+}
+
+function normalizeEmail(email) {
+  return String(email || '').trim().toLowerCase();
+}
+
+function hashPassword(password) {
+  return new Promise(function(resolve, reject) {
+    var salt = crypto.randomBytes(16).toString('base64');
+    crypto.scrypt(String(password), salt, 64, function(error, derivedKey) {
+      if (error) {
+        reject(error);
+        return;
+      }
+      resolve('scrypt$' + salt + '$' + derivedKey.toString('base64'));
+    });
+  });
+}
+
+function verifyPassword(password, storedHash) {
+  return new Promise(function(resolve, reject) {
+    var parts = String(storedHash || '').split('$');
+    if (parts.length !== 3 || parts[0] !== 'scrypt') {
+      resolve(false);
+      return;
+    }
+    var salt = parts[1];
+    var expected = Buffer.from(parts[2], 'base64');
+    crypto.scrypt(String(password), salt, expected.length, function(error, derivedKey) {
+      if (error) {
+        reject(error);
+        return;
+      }
+      resolve(crypto.timingSafeEqual(expected, derivedKey));
+    });
+  });
+}
+
+async function createAuthToken(userId, deviceFingerprint) {
+  var rawToken = randomToken(32);
+  var expiresAt = new Date(Date.now() + TOKEN_TTL_DAYS * 24 * 60 * 60 * 1000);
+  await db.execute(
+    'INSERT INTO auth_tokens (user_id, token_hash, device_fingerprint, expires_at, last_seen_at) VALUES (?, ?, ?, ?, CURRENT_TIMESTAMP)',
+    [userId, sha256(rawToken), deviceFingerprint || null, expiresAt]
+  );
+  return rawToken;
+}
+
+async function touchAuthToken(tokenHash) {
+  await db.execute('UPDATE auth_tokens SET last_seen_at = CURRENT_TIMESTAMP WHERE token_hash = ?', [tokenHash]);
+}
+
+async function revokeAuthToken(tokenHash) {
+  await db.execute('UPDATE auth_tokens SET revoked_at = CURRENT_TIMESTAMP WHERE token_hash = ? AND revoked_at IS NULL', [tokenHash]);
+}
+
+async function getAuthContextFromToken(rawToken) {
+  if (!rawToken) {
+    return null;
+  }
+  var tokenHash = sha256(rawToken);
+  var rows = await db.query(
+    'SELECT t.id AS token_id, t.user_id, t.token_hash, t.device_fingerprint, t.expires_at, t.revoked_at, u.email, u.status, k.wrapped_dek, k.kdf_salt, k.kdf_params, k.key_version FROM auth_tokens t INNER JOIN users u ON u.id = t.user_id LEFT JOIN user_keyrings k ON k.user_id = u.id WHERE t.token_hash = ? LIMIT 1',
+    [tokenHash]
+  );
+  if (!rows.length) {
+    return null;
+  }
+  var row = rows[0];
+  if (row.revoked_at) {
+    return null;
+  }
+  if (new Date(row.expires_at).getTime() <= Date.now()) {
+    return null;
+  }
+  if (Number(row.status || 0) !== 1) {
+    return null;
+  }
+  await touchAuthToken(tokenHash);
+  return {
+    tokenHash: tokenHash,
+    tokenId: row.token_id,
+    user: {
+      id: row.user_id,
+      email: row.email
+    },
+    keyring: row.wrapped_dek ? {
+      wrappedDek: row.wrapped_dek,
+      kdfSalt: row.kdf_salt,
+      kdfParams: parseJsonMaybe(row.kdf_params),
+      keyVersion: Number(row.key_version || 1)
+    } : null
+  };
+}
+
+async function requireAuth(request, reply) {
+  var header = request.headers.authorization || '';
+  var match = String(header).match(/^Bearer\s+(.+)$/i);
+  if (!match) {
+    reply.code(401);
+    throw new Error('未登录');
+  }
+  var authContext = await getAuthContextFromToken(match[1]);
+  if (!authContext) {
+    reply.code(401);
+    throw new Error('登录已失效');
+  }
+  request.authContext = authContext;
+}
+
+module.exports = {
+  createAuthToken,
+  getAuthContextFromToken,
+  hashPassword,
+  normalizeEmail,
+  parseJsonMaybe,
+  requireAuth,
+  revokeAuthToken,
+  sha256,
+  verifyPassword
+};
--- a/server/src/config.js
+++ b/server/src/config.js
@@ -0,0 +1,38 @@
+const fs = require('fs');
+const path = require('path');
+const dotenv = require('dotenv');
+
+const envPath = path.join(__dirname, '..', '.env');
+if (fs.existsSync(envPath)) {
+  dotenv.config({ path: envPath });
+}
+
+function numberFromEnv(name, fallback) {
+  const value = Number(process.env[name]);
+  return Number.isFinite(value) && value > 0 ? value : fallback;
+}
+
+module.exports = {
+  app: {
+    host: process.env.HOST || '127.0.0.1',
+    port: numberFromEnv('PORT', 3200),
+    logLevel: process.env.LOG_LEVEL || 'info'
+  },
+  db: {
+    host: process.env.MYSQL_HOST || '127.0.0.1',
+    port: numberFromEnv('MYSQL_PORT', 3306),
+    user: process.env.MYSQL_USER || '',
+    password: process.env.MYSQL_PASSWORD || '',
+    database: process.env.MYSQL_DATABASE || ''
+  },
+  crypto: {
+    secret: process.env.APP_ENCRYPTION_SECRET || ''
+  },
+  sharedCache: {
+    writeToken: process.env.SHARED_CACHE_WRITE_TOKEN || ''
+  },
+  redis: {
+    enabled: String(process.env.REDIS_ENABLED || 'true').toLowerCase() !== 'false',
+    url: process.env.REDIS_URL || 'redis://127.0.0.1:6379'
+  }
+};
--- a/server/src/crypto.js
+++ b/server/src/crypto.js
@@ -0,0 +1,49 @@
+const crypto = require('crypto');
+const config = require('./config');
+
+function getKey() {
+  if (!config.crypto.secret) {
+    throw new Error('APP_ENCRYPTION_SECRET 未配置');
+  }
+  return crypto.createHash('sha256').update(String(config.crypto.secret)).digest();
+}
+
+function encryptJson(value) {
+  const plainText = JSON.stringify(value);
+  const iv = crypto.randomBytes(12);
+  const cipher = crypto.createCipheriv('aes-256-gcm', getKey(), iv);
+  const encrypted = Buffer.concat([cipher.update(plainText, 'utf8'), cipher.final()]);
+  const tag = cipher.getAuthTag();
+  const payloadHash = crypto.createHash('sha256').update(plainText).digest('hex');
+
+  return {
+    ciphertext: encrypted.toString('base64'),
+    iv: iv.toString('base64'),
+    tag: tag.toString('base64'),
+    payloadHash
+  };
+}
+
+function decryptJson(record) {
+  const decipher = crypto.createDecipheriv(
+    'aes-256-gcm',
+    getKey(),
+    Buffer.from(record.iv, 'base64')
+  );
+  decipher.setAuthTag(Buffer.from(record.tag, 'base64'));
+  const decrypted = Buffer.concat([
+    decipher.update(Buffer.from(record.ciphertext, 'base64')),
+    decipher.final()
+  ]);
+  return JSON.parse(decrypted.toString('utf8'));
+}
+
+function sha256(value) {
+  return crypto.createHash('sha256').update(String(value || '')).digest('hex');
+}
+
+module.exports = {
+  encryptJson,
+  decryptJson,
+  sha256
+};
--- a/server/src/db.js
+++ b/server/src/db.js
@@ -0,0 +1,49 @@
+const mysql = require('mysql2/promise');
+const config = require('./config');
+
+let pool = null;
+
+function getPool() {
+  if (pool) {
+    return pool;
+  }
+
+  if (!config.db.host || !config.db.user || !config.db.database) {
+    throw new Error('MySQL 配置不完整');
+  }
+
+  pool = mysql.createPool({
+    host: config.db.host,
+    port: config.db.port,
+    user: config.db.user,
+    password: config.db.password,
+    database: config.db.database,
+    waitForConnections: true,
+    connectionLimit: 10,
+    queueLimit: 0,
+    charset: 'utf8mb4'
+  });
+
+  return pool;
+}
+
+async function query(sql, params) {
+  const [rows] = await getPool().query(sql, params || []);
+  return rows;
+}
+
+async function execute(sql, params) {
+  const [result] = await getPool().execute(sql, params || []);
+  return result;
+}
+
+async function ping() {
+  await query('SELECT 1 AS ok');
+}
+
+module.exports = {
+  getPool,
+  query,
+  execute,
+  ping
+};
--- a/server/src/index.js
+++ b/server/src/index.js
@@ -0,0 +1,61 @@
+const Fastify = require('fastify');
+const cors = require('@fastify/cors');
+const rateLimit = require('@fastify/rate-limit');
+const config = require('./config');
+const authRoutes = require('./routes/auth');
+const sharedCacheRoutes = require('./routes/shared-cache');
+const vaultRoutes = require('./routes/vault');
+
+async function buildApp() {
+  const app = Fastify({
+    logger: {
+      level: config.app.logLevel
+    },
+    bodyLimit: 1024 * 1024
+  });
+
+  await app.register(cors, {
+    origin: true,
+    credentials: false
+  });
+
+  await app.register(rateLimit, {
+    max: 120,
+    timeWindow: '1 minute'
+  });
+
+  app.get('/', async function () {
+    return {
+      ok: true,
+      service: 'magnet-cloud-cache-server',
+      version: '0.1.0'
+    };
+  });
+
+  await app.register(authRoutes);
+  await app.register(sharedCacheRoutes);
+  await app.register(vaultRoutes);
+  return app;
+}
+
+async function start() {
+  const app = await buildApp();
+  try {
+    await app.listen({
+      host: config.app.host,
+      port: config.app.port
+    });
+    app.log.info('server started');
+  } catch (error) {
+    app.log.error(error);
+    process.exit(1);
+  }
+}
+
+if (require.main === module) {
+  start();
+}
+
+module.exports = {
+  buildApp
+};
--- a/server/src/redis.js
+++ b/server/src/redis.js
@@ -0,0 +1,78 @@
+const { createClient } = require('redis');
+
+let clientPromise = null;
+
+async function getRedisClient(config) {
+  if (!config || !config.redis || !config.redis.enabled || !config.redis.url) {
+    return null;
+  }
+  if (clientPromise) {
+    return clientPromise;
+  }
+  clientPromise = (async function() {
+    const client = createClient({ url: config.redis.url });
+    client.on('error', function () {
+      return null;
+    });
+    await client.connect();
+    return client;
+  })().catch(function() {
+    clientPromise = null;
+    return null;
+  });
+  return clientPromise;
+}
+
+async function getJson(config, key) {
+  const client = await getRedisClient(config);
+  if (!client) {
+    return null;
+  }
+  try {
+    const value = await client.get(key);
+    return value ? JSON.parse(value) : null;
+  } catch (error) {
+    return null;
+  }
+}
+
+async function setJson(config, key, value, ttlSeconds) {
+  const client = await getRedisClient(config);
+  if (!client) {
+    return false;
+  }
+  try {
+    await client.set(key, JSON.stringify(value), {
+      EX: Math.max(1, Number(ttlSeconds) || 60)
+    });
+    return true;
+  } catch (error) {
+    return false;
+  }
+}
+
+async function delByPattern(config, pattern) {
+  const client = await getRedisClient(config);
+  if (!client) {
+    return 0;
+  }
+  try {
+    const keys = [];
+    for await (const key of client.scanIterator({ MATCH: pattern, COUNT: 100 })) {
+      keys.push(key);
+    }
+    if (keys.length > 0) {
+      await client.del(keys);
+    }
+    return keys.length;
+  } catch (error) {
+    return 0;
+  }
+}
+
+module.exports = {
+  getRedisClient,
+  getJson,
+  setJson,
+  delByPattern
+};
--- a/server/src/routes/auth.js
+++ b/server/src/routes/auth.js
@@ -0,0 +1,169 @@
+const db = require('../db');
+const {
+  createAuthToken,
+  getAuthContextFromToken,
+  hashPassword,
+  normalizeEmail,
+  parseJsonMaybe,
+  revokeAuthToken,
+  verifyPassword
+} = require('../auth');
+
+function normalizeString(value, limit) {
+  return String(value || '').trim().slice(0, limit);
+}
+
+function normalizeDeviceFingerprint(value) {
+  return normalizeString(value, 191);
+}
+
+function normalizeDeviceName(value) {
+  return normalizeString(value, 191) || 'Chrome Extension';
+}
+
+async function upsertDevice(userId, deviceName, deviceFingerprint) {
+  if (!deviceFingerprint) {
+    return;
+  }
+  await db.execute(
+    'INSERT INTO devices (user_id, device_name, device_fingerprint, last_seen_at) VALUES (?, ?, ?, CURRENT_TIMESTAMP) ON DUPLICATE KEY UPDATE device_name = VALUES(device_name), last_seen_at = CURRENT_TIMESTAMP',
+    [userId, deviceName, deviceFingerprint]
+  );
+}
+
+async function routes(fastify) {
+  fastify.post('/api/auth/register', async function (request, reply) {
+    var body = request.body || {};
+    var email = normalizeEmail(body.email);
+    var password = String(body.password || '');
+    var wrappedDek = normalizeString(body.wrappedDek, 5000);
+    var kdfSalt = normalizeString(body.kdfSalt, 255);
+    var keyVersion = Math.max(1, Number(body.keyVersion) || 1);
+    var deviceName = normalizeDeviceName(body.deviceName);
+    var deviceFingerprint = normalizeDeviceFingerprint(body.deviceFingerprint);
+    var kdfParams = body.kdfParams && typeof body.kdfParams === 'object' ? body.kdfParams : {};
+
+    if (!email || email.indexOf('@') === -1) {
+      reply.code(400);
+      return { ok: false, error: '请检查邮箱格式后再试' };
+    }
+    if (password.length < 6) {
+      reply.code(400);
+      return { ok: false, error: '密码长度还不够，请再确认一下' };
+    }
+    if (!wrappedDek || !kdfSalt) {
+      reply.code(400);
+      return { ok: false, error: '当前初始化信息不完整，请稍后再试' };
+    }
+
+    var existingRows = await db.query('SELECT id FROM users WHERE email = ? LIMIT 1', [email]);
+    if (existingRows.length > 0) {
+      reply.code(409);
+      return { ok: false, error: '这个邮箱已经可以直接登录了' };
+    }
+
+    var passwordHash = await hashPassword(password);
+    var userResult = await db.execute(
+      'INSERT INTO users (email, password_hash, status) VALUES (?, ?, 1)',
+      [email, passwordHash]
+    );
+    var userId = Number(userResult.insertId);
+    await db.execute(
+      'INSERT INTO user_keyrings (user_id, wrapped_dek, kdf_salt, kdf_params, key_version) VALUES (?, ?, ?, ?, ?)',
+      [userId, wrappedDek, kdfSalt, JSON.stringify(kdfParams), keyVersion]
+    );
+    await upsertDevice(userId, deviceName, deviceFingerprint);
+
+    var token = await createAuthToken(userId, deviceFingerprint);
+    return {
+      ok: true,
+      token: token,
+      user: { id: userId, email: email },
+      keyring: {
+        wrappedDek: wrappedDek,
+        kdfSalt: kdfSalt,
+        kdfParams: kdfParams,
+        keyVersion: keyVersion
+      }
+    };
+  });
+
+  fastify.post('/api/auth/login', async function (request, reply) {
+    var body = request.body || {};
+    var email = normalizeEmail(body.email);
+    var password = String(body.password || '');
+    var deviceName = normalizeDeviceName(body.deviceName);
+    var deviceFingerprint = normalizeDeviceFingerprint(body.deviceFingerprint);
+
+    var rows = await db.query(
+      'SELECT u.id, u.email, u.password_hash, u.status, k.wrapped_dek, k.kdf_salt, k.kdf_params, k.key_version FROM users u LEFT JOIN user_keyrings k ON k.user_id = u.id WHERE u.email = ? LIMIT 1',
+      [email]
+    );
+    if (!rows.length) {
+      reply.code(401);
+      return { ok: false, error: '账号信息没有对上，请再确认一下' };
+    }
+
+    var row = rows[0];
+    if (Number(row.status || 0) !== 1) {
+      reply.code(403);
+      return { ok: false, error: '当前账号暂时无法使用' };
+    }
+
+    var valid = await verifyPassword(password, row.password_hash);
+    if (!valid) {
+      reply.code(401);
+      return { ok: false, error: '账号信息没有对上，请再确认一下' };
+    }
+
+    await upsertDevice(row.id, deviceName, deviceFingerprint);
+    var token = await createAuthToken(row.id, deviceFingerprint);
+    return {
+      ok: true,
+      token: token,
+      user: { id: row.id, email: row.email },
+      keyring: {
+        wrappedDek: row.wrapped_dek,
+        kdfSalt: row.kdf_salt,
+        kdfParams: parseJsonMaybe(row.kdf_params) || {},
+        keyVersion: Number(row.key_version || 1)
+      }
+    };
+  });
+
+  fastify.get('/api/auth/me', async function (request, reply) {
+    var header = request.headers.authorization || '';
+    var match = String(header).match(/^Bearer\s+(.+)$/i);
+    if (!match) {
+      reply.code(401);
+      return { ok: false, error: '先登录后就可以继续了' };
+    }
+    var authContext = await getAuthContextFromToken(match[1]);
+    if (!authContext) {
+      reply.code(401);
+      return { ok: false, error: '登录状态需要重新确认一下' };
+    }
+    return {
+      ok: true,
+      user: authContext.user,
+      keyring: authContext.keyring
+    };
+  });
+
+  fastify.post('/api/auth/logout', async function (request, reply) {
+    var header = request.headers.authorization || '';
+    var match = String(header).match(/^Bearer\s+(.+)$/i);
+    if (!match) {
+      reply.code(400);
+      return { ok: false, error: '当前登录信息还没带上' };
+    }
+    var authContext = await getAuthContextFromToken(match[1]);
+    if (!authContext) {
+      return { ok: true };
+    }
+    await revokeAuthToken(authContext.tokenHash);
+    return { ok: true };
+  });
+}
+
+module.exports = routes;
--- a/server/src/routes/shared-cache.js
+++ b/server/src/routes/shared-cache.js
@@ -0,0 +1,477 @@
+const db = require('../db');
+const config = require('../config');
+const { encryptJson, decryptJson, sha256 } = require('../crypto');
+const redisCache = require('../redis');
+
+function requireSharedCacheWrite(request, reply) {
+  const token = String(request.headers['x-shared-cache-write-token'] || '');
+  if (!config.sharedCache.writeToken || token !== config.sharedCache.writeToken) {
+    reply.code(401);
+    return { ok: false, error: 'shared cache write unauthorized' };
+  }
+  return null;
+}
+
+function normalizeThread(thread) {
+  if (!thread || typeof thread !== 'object') return null;
+  const forumKey = typeof thread.forumKey === 'string' ? thread.forumKey.trim() : '';
+  const threadKey = typeof thread.threadKey === 'string' ? thread.threadKey.trim() : '';
+  const url = typeof thread.url === 'string' ? thread.url.trim() : '';
+  if (!forumKey || !threadKey) return null;
+  return {
+    forumKey,
+    threadKey,
+    url,
+    title: typeof thread.title === 'string' ? thread.title : '',
+    magnets: Array.isArray(thread.magnets) ? thread.magnets.filter(Boolean) : [],
+    lastSeenAt: Number(thread.lastSeenAt) || Date.now()
+  };
+}
+
+function normalizeCoverage(payload) {
+  const forumKey = typeof payload.forumKey === 'string' ? payload.forumKey.trim() : '';
+  const startPage = Math.max(1, Number(payload.startPage) || 1);
+  const endPage = Math.max(startPage, Number(payload.endPage) || startPage);
+  if (!forumKey) return null;
+  return {
+    forumKey,
+    startPage,
+    endPage,
+    strategy: typeof payload.strategy === 'string' && payload.strategy ? payload.strategy : 'full_live',
+    crawledAt: Number(payload.crawledAt) || Date.now(),
+    threads: Array.isArray(payload.threads) ? payload.threads : []
+  };
+}
+
+function normalizePageCoverage(payload) {
+  const forumKey = typeof payload.forumKey === 'string' ? payload.forumKey.trim() : '';
+  const page = Math.max(1, Number(payload.page) || 1);
+  if (!forumKey) return null;
+  return {
+    forumKey,
+    page,
+    crawledAt: Number(payload.crawledAt) || Date.now(),
+    threads: Array.isArray(payload.threads) ? payload.threads : []
+  };
+}
+
+function normalizePlanPayload(payload) {
+  const forumKey = typeof payload.forumKey === 'string' ? payload.forumKey.trim() : '';
+  const startPage = Math.max(1, Number(payload.startPage) || 1);
+  const endPage = Math.max(startPage, Number(payload.endPage) || startPage);
+  const frontRefreshPages = Math.max(0, Number(payload.frontRefreshPages) || 0);
+  if (!forumKey) return null;
+  return { forumKey, startPage, endPage, frontRefreshPages };
+}
+
+function buildPlanCacheKey(payload) {
+  return [
+    'coverage-plan',
+    payload.forumKey,
+    payload.startPage,
+    payload.endPage,
+    payload.frontRefreshPages
+  ].join(':');
+}
+
+async function getThreadMapForKeys(threadKeys) {
+  if (!Array.isArray(threadKeys) || threadKeys.length === 0) {
+    return [];
+  }
+  const placeholders = threadKeys.map(function () { return '?'; }).join(',');
+  const rows = await db.query(
+    'SELECT thread_key, payload_ciphertext, payload_iv, payload_tag FROM shared_thread_cache WHERE thread_key IN (' + placeholders + ')',
+    threadKeys
+  );
+  return rows.map(function (row) {
+    return decryptJson({
+      ciphertext: row.payload_ciphertext,
+      iv: row.payload_iv,
+      tag: row.payload_tag
+    });
+  }).filter(Boolean);
+}
+
+async function buildHydratedCoverageBlock(record, clippedStart, clippedEnd) {
+  const payload = decryptJson({
+    ciphertext: record.payload_ciphertext,
+    iv: record.payload_iv,
+    tag: record.payload_tag
+  });
+  const threads = Array.isArray(payload.threads) ? payload.threads : [];
+  if (!threads.length) {
+    return null;
+  }
+  return {
+    forumKey: record.forum_key,
+    startPage: clippedStart,
+    endPage: clippedEnd,
+    crawledAt: new Date(record.crawled_at).getTime(),
+    strategy: record.strategy || 'full_live',
+    frontRefreshPages: 0,
+    threads: threads
+  };
+}
+
+async function buildCoveragePlan(payload) {
+  const exactRows = await db.query(
+    'SELECT forum_key, start_page, end_page, strategy, thread_count, crawled_at, payload_ciphertext, payload_iv, payload_tag FROM shared_coverage_cache WHERE forum_key = ? AND start_page = ? AND end_page = ? ORDER BY crawled_at DESC LIMIT 1',
+    [payload.forumKey, payload.startPage, payload.endPage]
+  );
+  if (exactRows.length) {
+    const exactCoverage = await buildHydratedCoverageBlock(exactRows[0], payload.startPage, payload.endPage);
+    if (exactCoverage) {
+      return { ok: true, exactCoverage, cachedBlocks: [], shiftedCoverage: null, source: 'server_exact' };
+    }
+  }
+
+  const pageRows = await db.query(
+    'SELECT forum_key, page, crawled_at, payload_ciphertext, payload_iv, payload_tag FROM shared_page_cache WHERE forum_key = ? AND page BETWEEN ? AND ? ORDER BY page ASC',
+    [payload.forumKey, payload.startPage, payload.endPage]
+  );
+  const pageBlocks = [];
+  let currentBlock = null;
+  pageRows.forEach(function (row) {
+    const page = Number(row.page || 0);
+    if (!currentBlock || page !== currentBlock.endPage + 1) {
+      if (currentBlock) {
+        pageBlocks.push(currentBlock);
+      }
+      currentBlock = { startPage: page, endPage: page, rows: [row] };
+      return;
+    }
+    currentBlock.endPage = page;
+    currentBlock.rows.push(row);
+  });
+  if (currentBlock) {
+    pageBlocks.push(currentBlock);
+  }
+
+  const hydratedPageBlocks = pageBlocks.map(function (block) {
+    const merged = Object.create(null);
+    const threads = [];
+    let latestCrawledAt = 0;
+    block.rows.forEach(function (row) {
+      latestCrawledAt = Math.max(latestCrawledAt, new Date(row.crawled_at).getTime());
+      const payloadData = decryptJson({
+        ciphertext: row.payload_ciphertext,
+        iv: row.payload_iv,
+        tag: row.payload_tag
+      });
+      (Array.isArray(payloadData.threads) ? payloadData.threads : []).forEach(function (thread) {
+        const key = String(thread.threadKey || thread.url || '');
+        if (!key || merged[key]) {
+          return;
+        }
+        merged[key] = true;
+        threads.push(thread);
+      });
+    });
+    return {
+      forumKey: payload.forumKey,
+      startPage: block.startPage,
+      endPage: block.endPage,
+      crawledAt: latestCrawledAt,
+      strategy: 'assembled_pages',
+      frontRefreshPages: 0,
+      threads: threads
+    };
+  }).filter(function (block) {
+    return Array.isArray(block.threads) && block.threads.length > 0;
+  });
+
+  const coverageRows = await db.query(
+    'SELECT forum_key, start_page, end_page, strategy, thread_count, crawled_at, payload_ciphertext, payload_iv, payload_tag FROM shared_coverage_cache WHERE forum_key = ? AND start_page <= ? AND end_page >= ? ORDER BY start_page ASC, end_page DESC',
+    [payload.forumKey, payload.endPage, payload.startPage]
+  );
+  const hydratedCoverageBlocks = [];
+  for (const row of coverageRows) {
+    const clippedStart = Math.max(payload.startPage, Number(row.start_page || payload.startPage));
+    const clippedEnd = Math.min(payload.endPage, Number(row.end_page || payload.endPage));
+    if (clippedStart > clippedEnd) {
+      continue;
+    }
+    const block = await buildHydratedCoverageBlock(row, clippedStart, clippedEnd);
+    if (block) {
+      hydratedCoverageBlocks.push(block);
+    }
+  }
+
+  const allBlocks = hydratedPageBlocks.concat(hydratedCoverageBlocks).sort(function (a, b) {
+    const startDiff = Number(a.startPage || 0) - Number(b.startPage || 0);
+    if (startDiff !== 0) return startDiff;
+    return Number(b.endPage || 0) - Number(a.endPage || 0);
+  });
+
+  let shiftedCoverage = null;
+  if (payload.startPage === 1 && payload.frontRefreshPages > 0) {
+    const anchorRows = await db.query(
+      'SELECT forum_key, start_page, end_page, strategy, thread_count, crawled_at, payload_ciphertext, payload_iv, payload_tag FROM shared_coverage_cache WHERE forum_key = ? AND start_page = 1 ORDER BY crawled_at DESC, end_page DESC LIMIT 1',
+      [payload.forumKey]
+    );
+    if (anchorRows.length) {
+      const anchor = await buildHydratedCoverageBlock(anchorRows[0], 1, Math.min(payload.endPage, Number(anchorRows[0].end_page || payload.endPage)));
+      if (anchor) {
+        shiftedCoverage = {
+          forumKey: anchor.forumKey,
+          sourceStartPage: anchor.startPage,
+          sourceEndPage: Number(anchorRows[0].end_page || anchor.endPage),
+          crawledAt: anchor.crawledAt,
+          strategy: anchor.strategy,
+          threads: anchor.threads,
+          reusedStartPage: Math.min(payload.endPage, payload.startPage + payload.frontRefreshPages),
+          reusedEndPage: Math.min(payload.endPage, Number(anchorRows[0].end_page || payload.endPage) + payload.frontRefreshPages)
+        };
+        if (shiftedCoverage.reusedStartPage > shiftedCoverage.reusedEndPage) {
+          shiftedCoverage = null;
+        }
+      }
+    }
+  }
+
+  return {
+    ok: true,
+    exactCoverage: null,
+    cachedBlocks: allBlocks,
+    shiftedCoverage: shiftedCoverage,
+    source: 'server_plan'
+  };
+}
+
+async function getCloudStats() {
+  const countsRows = await db.query(
+    "SELECT (SELECT COUNT(*) FROM shared_thread_cache) AS thread_count, (SELECT COUNT(*) FROM shared_thread_cache WHERE magnet_count > 0) AS magnet_thread_count, (SELECT COUNT(*) FROM shared_coverage_cache) AS coverage_count, (SELECT COUNT(*) FROM shared_page_cache) AS page_count, (SELECT COUNT(*) FROM vault_items) AS vault_count, (SELECT COUNT(*) FROM users) AS user_count"
+  );
+  const latestRows = await db.query(
+    "SELECT (SELECT MAX(updated_at) FROM shared_thread_cache) AS latest_thread_time, (SELECT MAX(updated_at) FROM shared_coverage_cache) AS latest_coverage_time, (SELECT MAX(updated_at) FROM shared_page_cache) AS latest_page_time"
+  );
+  const sizeRows = await db.query(
+    "SELECT table_name, table_rows, ROUND((data_length + index_length) / 1024 / 1024, 2) AS size_mb FROM information_schema.tables WHERE table_schema = DATABASE() ORDER BY (data_length + index_length) DESC"
+  );
+
+  return {
+    ok: true,
+    counts: {
+      threads: Number(countsRows[0].thread_count || 0),
+      magnetThreads: Number(countsRows[0].magnet_thread_count || 0),
+      coverages: Number(countsRows[0].coverage_count || 0),
+      pages: Number(countsRows[0].page_count || 0),
+      vaultItems: Number(countsRows[0].vault_count || 0),
+      users: Number(countsRows[0].user_count || 0)
+    },
+    latest: {
+      threads: latestRows[0].latest_thread_time,
+      coverages: latestRows[0].latest_coverage_time,
+      pages: latestRows[0].latest_page_time
+    },
+    tables: sizeRows.map(function(row) {
+      return {
+        tableName: row.table_name,
+        rowCount: Number(row.table_rows || 0),
+        sizeMb: Number(row.size_mb || 0)
+      };
+    })
+  };
+}
+
+async function routes(fastify) {
+  fastify.get('/health', async function () {
+    return { ok: true, service: 'magnet-cloud-cache-server' };
+  });
+
+  fastify.get('/ready', async function (_, reply) {
+    try {
+      await db.ping();
+      return { ok: true };
+    } catch (error) {
+      reply.code(500);
+      return { ok: false, error: error.message };
+    }
+  });
+
+  fastify.get('/api/shared-cache/stats', async function () {
+    return getCloudStats();
+  });
+
+  fastify.post('/api/shared-cache/threads/lookup', async function (request) {
+    const items = Array.isArray(request.body && request.body.threads) ? request.body.threads : [];
+    const normalized = items.map(normalizeThread).filter(Boolean);
+    if (normalized.length === 0) {
+      return { ok: true, threads: [] };
+    }
+
+    const forumKey = normalized[0].forumKey;
+    const threadKeys = normalized.map(function (item) { return item.threadKey; });
+    const placeholders = threadKeys.map(function () { return '?'; }).join(',');
+    const rows = await db.query(
+      'SELECT forum_key, thread_key, payload_ciphertext, payload_iv, payload_tag, updated_at FROM shared_thread_cache WHERE forum_key = ? AND thread_key IN (' + placeholders + ')',
+      [forumKey].concat(threadKeys)
+    );
+
+    const result = rows.map(function (row) {
+      return decryptJson({
+        ciphertext: row.payload_ciphertext,
+        iv: row.payload_iv,
+        tag: row.payload_tag
+      });
+    });
+
+    return { ok: true, threads: result };
+  });
+
+  fastify.post('/api/shared-cache/threads/upsert', async function (request, reply) {
+    const denied = requireSharedCacheWrite(request, reply);
+    if (denied) return denied;
+    const items = Array.isArray(request.body && request.body.threads) ? request.body.threads : [];
+    const normalized = items.map(normalizeThread).filter(Boolean);
+    let saved = 0;
+
+    for (const item of normalized) {
+      const encrypted = encryptJson(item);
+      await db.execute(
+        'INSERT INTO shared_thread_cache (forum_key, thread_key, url_hash, title_hash, magnet_count, payload_ciphertext, payload_iv, payload_tag, payload_hash, last_seen_at) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, FROM_UNIXTIME(? / 1000)) ON DUPLICATE KEY UPDATE magnet_count = IF(VALUES(magnet_count) > 0 AND VALUES(last_seen_at) >= last_seen_at, VALUES(magnet_count), magnet_count), payload_ciphertext = IF(VALUES(magnet_count) > 0 AND VALUES(last_seen_at) >= last_seen_at, VALUES(payload_ciphertext), payload_ciphertext), payload_iv = IF(VALUES(magnet_count) > 0 AND VALUES(last_seen_at) >= last_seen_at, VALUES(payload_iv), payload_iv), payload_tag = IF(VALUES(magnet_count) > 0 AND VALUES(last_seen_at) >= last_seen_at, VALUES(payload_tag), payload_tag), payload_hash = IF(VALUES(magnet_count) > 0 AND VALUES(last_seen_at) >= last_seen_at, VALUES(payload_hash), payload_hash), last_seen_at = GREATEST(last_seen_at, VALUES(last_seen_at)), updated_at = IF(VALUES(magnet_count) > 0 AND VALUES(last_seen_at) >= last_seen_at, CURRENT_TIMESTAMP, updated_at)',
+        [
+          item.forumKey,
+          item.threadKey,
+          sha256(item.url),
+          sha256(item.title),
+          item.magnets.length,
+          encrypted.ciphertext,
+          encrypted.iv,
+          encrypted.tag,
+          encrypted.payloadHash,
+          item.lastSeenAt
+        ]
+      );
+      saved += 1;
+    }
+
+    return { ok: true, savedCount: saved };
+  });
+
+  fastify.post('/api/shared-cache/coverages/lookup', async function (request) {
+    const payload = normalizeCoverage(request.body || {});
+    if (!payload) {
+      return { ok: true, coverage: null };
+    }
+
+    const rows = await db.query(
+      'SELECT payload_ciphertext, payload_iv, payload_tag FROM shared_coverage_cache WHERE forum_key = ? AND start_page = ? AND end_page = ? AND strategy = ? LIMIT 1',
+      [payload.forumKey, payload.startPage, payload.endPage, payload.strategy]
+    );
+
+    if (!rows.length) {
+      return { ok: true, coverage: null };
+    }
+
+    return {
+      ok: true,
+      coverage: decryptJson({
+        ciphertext: rows[0].payload_ciphertext,
+        iv: rows[0].payload_iv,
+        tag: rows[0].payload_tag
+      })
+    };
+  });
+
+  fastify.post('/api/shared-cache/coverages/upsert', async function (request, reply) {
+    const denied = requireSharedCacheWrite(request, reply);
+    if (denied) return denied;
+    const payload = normalizeCoverage(request.body || {});
+    if (!payload) {
+      throw new Error('无效的 coverage 参数');
+    }
+
+    const encrypted = encryptJson(payload);
+    await db.execute(
+      'INSERT INTO shared_coverage_cache (forum_key, start_page, end_page, strategy, thread_count, crawled_at, payload_ciphertext, payload_iv, payload_tag, payload_hash) VALUES (?, ?, ?, ?, ?, FROM_UNIXTIME(? / 1000), ?, ?, ?, ?) ON DUPLICATE KEY UPDATE thread_count = IF(VALUES(crawled_at) >= crawled_at, VALUES(thread_count), thread_count), crawled_at = GREATEST(crawled_at, VALUES(crawled_at)), payload_ciphertext = IF(VALUES(crawled_at) >= crawled_at, VALUES(payload_ciphertext), payload_ciphertext), payload_iv = IF(VALUES(crawled_at) >= crawled_at, VALUES(payload_iv), payload_iv), payload_tag = IF(VALUES(crawled_at) >= crawled_at, VALUES(payload_tag), payload_tag), payload_hash = IF(VALUES(crawled_at) >= crawled_at, VALUES(payload_hash), payload_hash), updated_at = IF(VALUES(crawled_at) >= crawled_at, CURRENT_TIMESTAMP, updated_at)',
+      [
+        payload.forumKey,
+        payload.startPage,
+        payload.endPage,
+        payload.strategy,
+        payload.threads.length,
+        payload.crawledAt,
+        encrypted.ciphertext,
+        encrypted.iv,
+        encrypted.tag,
+        encrypted.payloadHash
+      ]
+    );
+
+    redisCache.delByPattern(config, 'coverage-plan:' + payload.forumKey + ':*').catch(function () {});
+
+    return { ok: true };
+  });
+
+  fastify.post('/api/shared-cache/pages/lookup', async function (request) {
+    const payload = normalizePageCoverage(request.body || {});
+    if (!payload) {
+      return { ok: true, coverage: null };
+    }
+
+    const rows = await db.query(
+      'SELECT payload_ciphertext, payload_iv, payload_tag FROM shared_page_cache WHERE forum_key = ? AND page = ? LIMIT 1',
+      [payload.forumKey, payload.page]
+    );
+
+    if (!rows.length) {
+      return { ok: true, coverage: null };
+    }
+
+    return {
+      ok: true,
+      coverage: decryptJson({
+        ciphertext: rows[0].payload_ciphertext,
+        iv: rows[0].payload_iv,
+        tag: rows[0].payload_tag
+      })
+    };
+  });
+
+  fastify.post('/api/shared-cache/pages/upsert', async function (request, reply) {
+    const denied = requireSharedCacheWrite(request, reply);
+    if (denied) return denied;
+    const payload = normalizePageCoverage(request.body || {});
+    if (!payload) {
+      throw new Error('无效的 page coverage 参数');
+    }
+
+    const encrypted = encryptJson(payload);
+    await db.execute(
+      'INSERT INTO shared_page_cache (forum_key, page, thread_count, crawled_at, payload_ciphertext, payload_iv, payload_tag, payload_hash) VALUES (?, ?, ?, FROM_UNIXTIME(? / 1000), ?, ?, ?, ?) ON DUPLICATE KEY UPDATE thread_count = IF(VALUES(crawled_at) >= crawled_at, VALUES(thread_count), thread_count), crawled_at = GREATEST(crawled_at, VALUES(crawled_at)), payload_ciphertext = IF(VALUES(crawled_at) >= crawled_at, VALUES(payload_ciphertext), payload_ciphertext), payload_iv = IF(VALUES(crawled_at) >= crawled_at, VALUES(payload_iv), payload_iv), payload_tag = IF(VALUES(crawled_at) >= crawled_at, VALUES(payload_tag), payload_tag), payload_hash = IF(VALUES(crawled_at) >= crawled_at, VALUES(payload_hash), payload_hash), updated_at = IF(VALUES(crawled_at) >= crawled_at, CURRENT_TIMESTAMP, updated_at)',
+      [
+        payload.forumKey,
+        payload.page,
+        payload.threads.length,
+        payload.crawledAt,
+        encrypted.ciphertext,
+        encrypted.iv,
+        encrypted.tag,
+        encrypted.payloadHash
+      ]
+    );
+
+    redisCache.delByPattern(config, 'coverage-plan:' + payload.forumKey + ':*').catch(function () {});
+
+    return { ok: true };
+  });
+
+  fastify.post('/api/shared-cache/coverages/plan', async function (request) {
+    const payload = normalizePlanPayload(request.body || {});
+    const cacheKey = payload ? buildPlanCacheKey(payload) : '';
+    let cachedPlan = null;
+    if (!payload) {
+      return { ok: false, error: 'invalid coverage plan payload' };
+    }
+    cachedPlan = await redisCache.getJson(config, cacheKey);
+    if (cachedPlan) {
+      return Object.assign({}, cachedPlan, { source: 'redis_plan' });
+    }
+    const plan = await buildCoveragePlan(payload);
+    await redisCache.setJson(config, cacheKey, plan, 90);
+    return plan;
+  });
+}
+
+module.exports = routes;
--- a/server/src/routes/vault.js
+++ b/server/src/routes/vault.js
@@ -0,0 +1,96 @@
+const db = require('../db');
+const { requireAuth } = require('../auth');
+
+function normalizeVaultItem(item) {
+  if (!item || typeof item !== 'object') {
+    return null;
+  }
+  var itemType = String(item.itemType || '').trim().slice(0, 64);
+  var itemKey = String(item.itemKey || '').trim().slice(0, 191);
+  var payloadCiphertext = String(item.payloadCiphertext || '').trim();
+  var payloadIv = String(item.payloadIv || '').trim().slice(0, 128);
+  var payloadTag = String(item.payloadTag || '').trim().slice(0, 128);
+  var payloadHash = String(item.payloadHash || '').trim().slice(0, 64);
+  var keyVersion = Math.max(1, Number(item.keyVersion) || 1);
+
+  if (!itemType || !itemKey || !payloadCiphertext || !payloadIv || !payloadTag || !payloadHash) {
+    return null;
+  }
+
+  return {
+    itemType: itemType,
+    itemKey: itemKey,
+    payloadCiphertext: payloadCiphertext,
+    payloadIv: payloadIv,
+    payloadTag: payloadTag,
+    payloadHash: payloadHash,
+    keyVersion: keyVersion
+  };
+}
+
+async function routes(fastify) {
+  fastify.addHook('preHandler', requireAuth);
+
+  fastify.post('/api/vault/push', async function (request, reply) {
+    var items = Array.isArray(request.body && request.body.items) ? request.body.items : [];
+    var normalized = items.map(normalizeVaultItem).filter(Boolean);
+    var index = 0;
+    var item = null;
+    if (normalized.length === 0) {
+      reply.code(400);
+      return { ok: false, error: '没有可保存的保险柜项目' };
+    }
+
+    for (index = 0; index < normalized.length; index++) {
+      item = normalized[index];
+      await db.execute(
+        'INSERT INTO vault_items (user_id, item_type, item_key, payload_ciphertext, payload_iv, payload_tag, payload_hash, key_version) VALUES (?, ?, ?, ?, ?, ?, ?, ?) ON DUPLICATE KEY UPDATE payload_ciphertext = VALUES(payload_ciphertext), payload_iv = VALUES(payload_iv), payload_tag = VALUES(payload_tag), payload_hash = VALUES(payload_hash), key_version = VALUES(key_version), updated_at = CURRENT_TIMESTAMP',
+        [
+          request.authContext.user.id,
+          item.itemType,
+          item.itemKey,
+          item.payloadCiphertext,
+          item.payloadIv,
+          item.payloadTag,
+          item.payloadHash,
+          item.keyVersion
+        ]
+      );
+    }
+
+    return { ok: true, savedCount: normalized.length };
+  });
+
+  fastify.post('/api/vault/pull', async function (request) {
+    var itemTypes = Array.isArray(request.body && request.body.itemTypes) ? request.body.itemTypes.map(function (itemType) {
+      return String(itemType || '').trim().slice(0, 64);
+    }).filter(Boolean) : [];
+
+    var sql = 'SELECT item_type, item_key, payload_ciphertext, payload_iv, payload_tag, payload_hash, key_version, updated_at FROM vault_items WHERE user_id = ?';
+    var params = [request.authContext.user.id];
+    if (itemTypes.length > 0) {
+      sql += ' AND item_type IN (' + itemTypes.map(function () { return '?'; }).join(',') + ')';
+      params = params.concat(itemTypes);
+    }
+    sql += ' ORDER BY updated_at DESC';
+
+    var rows = await db.query(sql, params);
+    return {
+      ok: true,
+      items: rows.map(function (row) {
+        return {
+          itemType: row.item_type,
+          itemKey: row.item_key,
+          payloadCiphertext: row.payload_ciphertext,
+          payloadIv: row.payload_iv,
+          payloadTag: row.payload_tag,
+          payloadHash: row.payload_hash,
+          keyVersion: Number(row.key_version || 1),
+          updatedAt: row.updated_at
+        };
+      })
+    };
+  });
+}
+
+module.exports = routes;
Author	SHA1	Message	Date
Developer	a7ff557942	feat(popup): 重做扩展云同步中心与项目文档 Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>	2026-03-18 00:28:14 +08:00
Developer	5d0611de60	feat(ui): 重构页面面板并增强抓取缓存与下载交互 Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>	2026-03-18 00:27:52 +08:00
Developer	1bf9c072c8	feat(ext): 接入云缓存、同步中心与状态统计链路 Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>	2026-03-18 00:27:27 +08:00
Developer	6764f4c53b	feat(server): 新增云端缓存与同步服务端骨架 Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>	2026-03-18 00:27:04 +08:00
Developer	df12a6ac72	fix: 修复所有CSS注释未用引号包裹的语法错误	2026-03-11 19:23:27 +08:00
Developer	4f6ccd2978	fix: 修复CSS语法错误和重复函数定义	2026-03-11 19:17:30 +08:00
Developer	51124bbb2e	fix(css): 修复CSS样式错误导致UI无法显示	2026-03-11 18:25:59 +08:00
Developer	1b702b1b93	feat: 新增进度条、收藏夹、历史记录、通知提醒功能 ## 新功能 1. 进度条 - 可视化抓取进度 2. 收藏夹 - 持久收藏磁力链接（♡按钮） 3. 历史记录 - 关键词搜索历史（点击输入框显示） 4. 通知提醒 - 完成时提示音 + 浏览器通知 ## 技术实现 - 使用 localStorage 存储收藏和历史 - 使用 Web Audio API 播放提示音 - 使用 Notification API 显示浏览器通知 - CSS 进度条动画效果	2026-03-11 18:23:06 +08:00
Developer	52304d10e0	fix(ui): 修复设置区域和状态栏的浅色样式 - 关键词输入框改用暗色主题 - 页码范围输入框改用暗色主题 - 按钮样式改用霓虹青渐变 - 速度选择器改用暗色主题 - 状态栏改用暗色主题配色 - 缓存加载提示改用暗色主题 - updateStatus函数改用暗色主题状态色	2026-03-10 23:25:50 +08:00
Developer	8953277de3	feat(ui): 全面重设计 - 暗色科技风UI ## 设计变更 - 全新暗色主题配色（深灰蓝 + 霓虹青强调色） - 引入 Rajdhani + Noto Sans SC 字体组合 - 悬浮球添加脉冲呼吸动画和发光效果 - 面板添加入场动画和玻璃拟态效果 - 列表项添加交错入场动画 - 按钮添加发光 hover 和按下反馈 - 自定义滚动条样式 - 优化状态栏颜色区分（加载/成功/错误） ## 文件变更 - content.js: 完全重写 CSS 样式系统 - popup.html: 重新设计弹窗界面 - manifest.json: 版本升级到 1.3 ## 版本管理 - master 分支保留原始版本 - ui-redesign 分支为当前工作版本 - 可通过 `git checkout master` 随时回滚	2026-03-10 23:20:30 +08:00