feat(apes-sidebar): Phase 0 工程骨架 — host/client 分裂 + i18n + 不变量面

从 0 重写的 v2.0.0 DSH 侧边栏插件第一阶段：
- 工程骨架：tsdown 双构建（host ESM + client CJS closure）、vitest、strict TS
- host 半：namespace 插件形状（name/inject/apply，无 default），minimal apply
- client 半：closure factory 注册 5 个 apes:* tab 占位 + zh/en i18n
- 不变量面：assert/semver/peer guard（dsh-better-sidebar >= 0.18.0）
- 依赖策略：dsh-better-sidebar=peerDependency（不打包），cordis=devDependency（仅类型）
- 门禁：pnpm typecheck + build + test 全绿（14 单测通过）
- AGENTS.md 工程约定 + .gitignore（排除 lib/node_modules/maxkb-integration）

模板：dsh-better-sidebar。作用域锁定信息层（tasks/agents/apps/messages/profile），
不含 file/terminal/browser（归 better-sidebar）、不含 team/room（归 background-agents）。

src/context-types.ts

@@ -0,0 +1,109 @@
+/**
+ * Structural types for the cordis services apes-sidebar consumes, plus the
+ * Context face both halves share.
+ *
+ * The type base is the `@deepseek-ai/cordis` Context; the service members
+ * this plugin touches are restated below as structural mirrors and combined
+ * with the base by INTERSECTION. Intersection (not `declare module`
+ * augmentation) is deliberate: DSH's own packages already augment
+ * `@deepseek-ai/cordis` and the host and client packages declare *different*
+ * types for the same member — intersecting keeps every face available.
+ *
+ * This file must stay FREE of Node.js types: it is part of the
+ * CLIENT-reachable declaration graph (the `Context` in TabComponentProps and
+ * the `apesSidebar` augmentation), so a Node import here would leak into
+ * browser-only consumer builds.
+ */
+import type { Context as CordisContext } from '@deepseek-ai/cordis'
+
+/** One session row the sidebar reads (client sessions list feed). */
+export interface ApesSessionSummary {
+  id: string
+  cwd?: string
+  displayTitle: string
+  /** Coarse durable origin for navigation filtering (subagent children). */
+  origin?: 'subagent'
+  /** Durable direct parent session id (present on subagent children). */
+  parentId?: string
+  /** Whether the session's agent is currently running. */
+  running?: boolean
+}
+
+/** The client session list snapshot the sidebar subscribes to. */
+export interface ApesSessionList {
+  current: string | undefined
+  byId: Record<string, ApesSessionSummary>
+}
+
+/** The client sessions service face (only the list feed + open are needed). */
+export interface ApesSessionsService {
+  list: {
+    getSnapshot(): ApesSessionList
+    subscribe(fn: () => void): () => void
+  }
+  /** Select a listed session as current. */
+  open?(id: string): void
+}
+
+/** The client locale service face (mirror of dsh-client-locale's LocaleRuntime). */
+export interface ApesLocaleService {
+  getSnapshot(): { active: string }
+  subscribe(fn: () => void): () => void
+  register(ns: string, locale: string, dict: Record<string, string>): () => void
+}
+
+/** The client slots service face (register returns the disposer). */
+export interface ApesSlotsService {
+  register(options: Record<string, unknown>, component: unknown): () => void
+  inject(key: string, callback: () => () => void): () => void
+}
+
+/**
+ * The `ctx.apesSidebar` service face: a registry that lets apes-sidebar
+ * (and future sibling plugins) contribute sidebar tab descriptors to the
+ * better-sidebar host. For Phase 0 this is a minimal self-registry; in
+ * Phase 1 it is re-exported from the better-sidebar `BetterSidebarService`
+ * (type-only import through `dsh-better-sidebar/client/service`).
+ *
+ * NOTE: this is a PLACEHOLDER contract for the skeleton. Phase 1 replaces
+ * it with the real better-sidebar `BetterSidebarService` + `TabDescriptor`
+ * types (type-only imports, which are erased and never reach the bundle
+ * purity gate).
+ */
+export interface ApesSidebarTabDescriptor {
+  /** Unique id; also the `SidebarTab.type` value (`'apes:tasks'`, …). */
+  id: string
+  title: string | (() => string)
+  icon?: unknown
+  /** + menu sort order (ascending); default 100. */
+  order?: number
+  hidden?: boolean
+  /** Single-instance sugar. */
+  single?: boolean
+  /** Tab-strip badge: a number renders as a count, a string as-is. */
+  badge?: (ctx: ApesContext, state: unknown) => string | number | null | undefined
+  component: (props: Record<string, unknown>) => unknown
+}
+
+/** The `ctx.apesSidebar` service face (Phase 0 placeholder). */
+export interface ApesSidebarService {
+  registerTab(descriptor: ApesSidebarTabDescriptor): () => void
+  getTabs(): readonly ApesSidebarTabDescriptor[]
+  subscribe(listener: () => void): () => void
+}
+
+/**
+ * The Context face this plugin's code resolves against. Intersecting the
+ * cordis base with the structural service mirrors keeps every face
+ * available without module-level conflicts.
+ */
+export type ApesContext = CordisContext & {
+  /** The client-side registry (client half only). */
+  apesSidebar?: ApesSidebarService
+  /** The client sessions feed (client half only). */
+  sessions?: ApesSessionsService
+  /** The client locale runtime (client half only). */
+  locale?: ApesLocaleService
+  /** The client slots service (client half only). */
+  slots?: ApesSlotsService
+}