docs: generate each subsystem's cordis surface into its own page; delete the flat catalogs

Rebuild of the region machinery (PR3) on the post-#904 Typert projection:
renderPageRegion/renderInheritedPage live in dsh-typert-generator beside the
projection; scripts/gen-cordis-catalog.ts owns the curated SERVICE_PAGE /
EVENT_SCOPE_PAGE / SERVICE_WALK_EXEMPTIONS / LINK_MAP partition (fail-loud in
both directions, with the independent Context-merge scan backstopping the
projection's blind spot), spliceRegion, and the guarded pair auto-record.
docs/cordis-catalog/ is deleted: the flat events/services catalogs dissolve
into per-page regions and docs/cordis-catalog/core moves to docs/cordis-api/
with the inherited tier as its own generated page. The partition absorbs the
post-regrouping surface: ctx.typert → invariants.md, ctx.directoryPicker →
workspace.md, skills/* events → skills.md, and the four launcher-provided tui
accessor values join the named exemptions.

docs/cordis-tutorial/03-services.zh.md

@@ -91,7 +91,7 @@ export function apply(ctx: Context) {
 
 ## 命名
 
-每个应用中的服务名称共用一个扁平命名空间。请为自有服务添加有辨识度的前缀或命名空间（harness 已占用 `tools` 和 `llm` 等普通名称）；生成的[服务目录](../cordis-catalog/services.md)列出 harness 注册的每个名称。
+每个应用中的服务名称共用一个扁平命名空间。请为自有服务添加有辨识度的前缀或命名空间（harness 已占用 `tools` 和 `llm` 等普通名称）；[子系统页面](../subsystems/core.md)上生成的 `cordis-surface` 区块列出 harness 注册的每个名称。
 
 下一章：[事件](04-events.md)：无需共享服务即可通信。