build(vendor): rescope the vendored Cordis packages into @deepseek-ai

Machine-produced by `pnpm run rescope-vendor --apply` plus the regeneration it
prints: `pnpm install` for the lockfile, `pnpm run gen-third-party-notices`,
`verify-translation-pairing --write` for the touched bilingual pairs,
`gen-doc-graphs`, and one typert snapshot whose ids embed character offsets.
`pnpm run rescope-vendor --check` verifies the result.

Renames nine vendored packages (cordis, cosmokit, schemastery and the six
@cordisjs plugins) and every reference that resolves them: manifest names and
dependency keys, module specifiers including declare-module merges, cordis.yml
plugin names, tsconfig paths, every Markdown fence, and `docs/` prose.
Directory names, upstream versions, and dependency ranges are unchanged, so
vendor/README.md still reads as an upstream snapshot; its manifest table gains
an upstream-name column so THIRD_PARTY_NOTICES keeps MIT attribution pointed
at each fork's origin.

The tutorial tier follows the rename end to end: its yaml fences named plugins
the Loader can no longer resolve, its `ts ignore-check` fences disagreed with
the compiled fences beside them, and its prose quoted both. The contracts that
told readers to keep upstream names — the root convention and the vendoring
cookbook's tree comment and manifest invariant — now say to rescope instead.

Two rules read `@deepseek-ai/` as "another workspace plugin": the client bundle
purity gate now names the vendored libraries a browser bundle inlines, and the
files where a bare `cordis` is an agent-preset id keep that product data.

packages/host/directory-picker/package.json

@@ -26,10 +26,10 @@
   "license": "BSD-3-Clause",
   "peerDependencies": {
     "@deepseek-ai/dsh-invariants": "^0.0.1",
-    "cordis": "^4.0.0-rc.7"
+    "@deepseek-ai/cordis": "^4.0.0-rc.7"
   },
   "devDependencies": {
     "@deepseek-ai/dsh-invariants": "workspace:^",
-    "cordis": "^4.0.0-rc.7"
+    "@deepseek-ai/cordis": "^4.0.0-rc.7"
   }
 }

packages/host/directory-picker/src/index.ts

@@ -11,7 +11,7 @@
  * @module @deepseek-ai/dsh-host-directory-picker
  */
 
-import { Context, Service } from 'cordis'
+import { Context, Service } from '@deepseek-ai/cordis'
 
 /** The native interaction: one OS directory chooser on the host display. */
 export interface DirectoryPickerNativeCapability {
@@ -115,7 +115,7 @@ export class DirectoryPickerError extends Error {
   }
 }
 
-declare module 'cordis' {
+declare module '@deepseek-ai/cordis' {
   interface Context {
     directoryPicker: DirectoryPicker
   }

packages/host/directory-picker/src/invariant.ts

@@ -1,6 +1,6 @@
 /** Package-owned invariant companion for the directory-picker seam. @module @deepseek-ai/dsh-host-directory-picker/invariant */
 
-import type { Context } from 'cordis'
+import type { Context } from '@deepseek-ai/cordis'
 import type { InvariantInstaller } from '@deepseek-ai/dsh-invariants'
 
 const PACKAGE_NAME = '@deepseek-ai/dsh-host-directory-picker'

packages/host/directory-picker/tests/seam.spec.ts

@@ -1,7 +1,7 @@
 /** Contract behavior the seam itself owns: registration identity and typed failures. */
 
 import { describe, expect, it } from 'vitest'
-import { Context } from 'cordis'
+import { Context } from '@deepseek-ai/cordis'
 import { DirectoryPicker, DirectoryPickerError } from '../src/index.ts'
 import type { DirectoryPickerCapability } from '../src/index.ts'