docs: integrate Learning removal

.project-docs/20-architecture/system-overview.md

@@ -13,7 +13,7 @@ Makelore 是 Electron 桌面客户端。Renderer 负责项目操作与状态展
 | Project Configuration & Template | 保存不可变 `ProjectType`，原子生成新项目骨架 | 小游戏/小程序生成受控 Vite 模板；自定义保持最小项目空间 |
 | Project Release Builder | Main-owned 安全快照、本地 npm/Vite 构建、双归档与 artifact contract | 固定 npm 11.6.2；Vite 由项目 lockfile 锁定；产物与预检使用同一内存字节 |
 | Works Session & Remembered Password | Main-owned 登录、刷新、注销、七天真实活动滑动续期与可选密码回填 | 登录、刷新、注销统一经过 Works Square；轮换凭据由 Main 安全持有和持久化。记住密码使用独立的 packaged-only OS 加密记录，不进入 Renderer 持久状态或 Works Square；客户端不携带 OAuth client secret |
-| Module Access Policy | Main-owned `/api/auth/me` projection → Renderer auth state → module chooser/router | Renderer 只接收 Code/Canvas/Learning/Robot 四个布尔值；缺失对象或字段默认开启，服务端 `design` 映射客户端 `painting` |
+| Module Access Policy | Main-owned `/api/auth/me` projection → Renderer auth state → module chooser/router | Renderer 只接收 Code/Canvas/Robot 三个布尔值；缺失对象或字段默认开启，服务端 `design` 映射客户端 `painting`，额外旧字段被忽略 |
 | Submission Binding | 保存云端已接受的精确 app/version/review/hash 绑定 | schema v2 只记录成功提交；旧中间态迁移为 `legacy_retired`，不恢复后台任务 |
 | Play URL Projection | 校验服务端公共播放地址 | 只接受同源 HTTPS 和精确 `/apps/{app_id}/`；优先 `play_url`，`runtime_url` 仅一版本回退 |
 | Built Artifact Preflight | 在上传前对最终 built snapshot 做桌面/移动 UX fail-fast | Main 使用临时 loopback origin 与 Electron WebContents/CDP；不使用 Playwright、不生成可信证明 |
@@ -31,9 +31,6 @@ Makelore 是 Electron 桌面客户端。Renderer 负责项目操作与状态展
 | AI Design Quote & Task Controls | 精确 Specification revision 编译出的不可变 Quote 与 Workspace Tasks | 客户端只展示 public output summary、warnings、expiry 与 Token Points，并以 Quote ID 确认；Provider Prompt/model/route/storage/billing atoms 不下发 |
 | AI Design Assets | Workspace 已完成作品或本地上传的真实 Asset | Asset 通过 typed binding 写入 Specification；生成结果经 Main-owned asset download 保存 |
 | Prompt Museum | Canvas “获取灵感”页面 → Main Host API → Works Square | 服务端驱动的审核内容、筛选和分页；Renderer 不持有 Works Token 或内置数据集，“使用此 Prompt”只回填输入框 |
-| Learning Project Catalog | 服务端分页项目卡片、README 详情与用户选择的 ZIP 下载 | Renderer 只持有安全项目 DTO 和 Markdown；不提供生成、进度、本地课程库或播放器 |
-| Learning Main Boundary | 固定 Host API → Works Square project list/detail/media/archive | Main 持有 Works Bearer、封面/历史媒体代理、原生保存路径、受控重定向、临时文件、SHA-256/ZIP 签名校验与原子落盘；归档下载不执行大小校验，README 图片节点可直接加载无凭据 HTTPS URL，Renderer 不获得任意归档 URL 或本地路径 |
-
 | Robot Workspace | Account-scoped agent configuration, device activation/binding, assignment, and credential-recovery UI | Renderer receives only safe Works Square projections. Configuration choices come from the USER-scoped safe catalog; unavailable current values remain editable without exposing provider credentials or configuration internals. |
 | AI Hardware Main Route | Fixed `/api/works/ai-hardware` Host API to Works Square proxy | Main owns Bearer auth, stable operation IDs, bounded retry, ETag/If-Match, request/response limits, error redaction, and the fixed no-store configuration-catalog proxy. Versioned responses accept only canonical strong or weak numeric ETags that equal the DTO revision; mutations always emit strong `If-Match`. It never forwards Renderer authorization headers. |
 | Robot Hotspot Module | Main-owned bounded scan/connect/verify interface with Windows WLAN and macOS CoreWLAN/CoreLocation adapters | Accepts only short-lived opaque candidates from the latest scan, exposes no BSSID/interface/profile/native diagnostic, and retains the system-Wi-Fi fallback. |
@@ -43,13 +40,15 @@ Makelore 是 Electron 桌面客户端。Renderer 负责项目操作与状态展
 
 - Renderer 只能通过 Main Host API 发起认证操作。Electron Main 是 access/refresh token 的唯一客户端所有者；登录、刷新、注销统一经过 Works Square 固定路由，客户端不得直连 one-feel/custom 身份服务，也不得保存 confidential OAuth client secret。
 - 可选的记住密码记录属于 Electron Main 的独立本机边界，只能在正式安装包且 OS 凭据加密可用时落盘；Renderer 不得持久化账号密码，Works Square 不得接收记住标志或新增密码持久化。
-- Code、Canvas、Learning 与 Robot 是四个已启用顶层产品模块；Robot 仍是唯一硬件产品模块，不存在单独 Hardware 卡片。
-- 每个登录用户可由 Works `module_access` 关闭任意顶层模块入口。Main 只投影四个布尔值；被关闭卡片置灰不可点，根/深层/别名路由在 `MainLayout` 和模块初始化前拦截。Code provider 必须等待 auth policy hydration，而全局 `/settings` 不属于 Code policy guard。
+- Code、Canvas 与 Robot 是三个已启用顶层产品模块；Robot 仍是唯一硬件产品模块，不存在单独 Hardware 卡片。
+- 每个登录用户可由 Works `module_access` 关闭任意顶层模块入口。Main 只投影三个布尔值；被关闭卡片置灰不可点，根/深层/别名路由在 `MainLayout` 和模块初始化前拦截。Code provider 必须等待 auth policy hydration，而全局 `/settings` 不属于 Code policy guard。
 - 模块入口策略是用户交互与客户端初始化边界，不是服务端 API 授权。终止性 `/api/auth/me` `401` 必须清理 Main 和 Renderer 会话；各模块 API 仍须独立强制认证与授权。
 - Product UI language is Chinese-only. Unsupported system or persisted language values normalize to `zh`; removed locale files are not runtime fallbacks.
 - Canvas is cloud-only in development and packaged builds. The removed local Workspace adapter and V1 DTOs are not fallback paths.
 - Prompt Museum is a read-only curated inspiration surface, not a user-content community. Main owns Works authentication and forwards only the bounded list/detail routes; the client never bundles museum content or automatically submits a selected Prompt.
-- Learning uses a Main-owned read-only project-catalog boundary. Renderer does not receive Works credentials, object-storage identifiers, arbitrary archive URLs, temporary/final paths, or an arbitrary network proxy. README raw HTML is disabled; Markdown image nodes alone may load validated credential-free HTTPS URLs directly, including SVG and other formats Electron supports. Main continues to validate covers/historical media and streams a selected project ZIP through bounded same-origin redirects, SHA-256, ZIP signature, and atomic rename before returning only `saved` or `cancelled`; it ignores archive size metadata and applies no client download-size ceiling.
+- Learning is retired. No Learning route, Renderer surface, Main Host API, download service,
+  shared DTO, packaging asset, or fallback remains. Historical downloaded course data is
+  not read, migrated, or automatically deleted.
 - AI hardware network access is Main-owned. Renderer cannot hold Works Square or Xiaozhi credentials and cannot select arbitrary upstream paths or headers.
 - Robot model, language, and voice choices are dynamically projected from the Xiaozhi USER catalog through Works Square and Electron Main; the catalog is bounded, account-scoped, and `private, no-store` at each public hop.
 - One local account maps to one server-side Xiaozhi account binding. Agents and devices are resources beneath that account binding, not separate Xiaozhi users.
@@ -97,7 +96,7 @@ Makelore 是 Electron 桌面客户端。Renderer 负责项目操作与状态展
 
 ## Related Decisions
 
-- 当前长期边界记录于 README、ADR-002 至 ADR-007（ADR-001 已由 ADR-007 supersede）及各 Integration Gate；后续如改变唯一入口、凭据所有权、构建执行边界、Living Form/Specification 状态归属、Pi 单 runtime/worker/lease 边界、Learning/Marketplace/Web Search 分发边界、Robot 配网边界或重新引入客户端部署协调器，应新增 ADR。
+- 当前长期边界记录于 README、ADR-002 至 ADR-007（ADR-001 与 ADR-005 已 supersede）及各 Integration Gate；后续如改变唯一入口、凭据所有权、构建执行边界、Living Form/Specification 状态归属、Pi 单 runtime/worker/lease 边界、Marketplace/Web Search 分发边界、Robot 配网边界、重新引入 Learning 或重新引入客户端部署协调器，应新增 ADR。
 
 ## Last Updated