fix(rebase): migrate the replayed stack onto current master APIs

The linear replay carried each commit's own lineage, so this checkpoint
restores the master-owned surfaces the conflicted regions clobbered and
migrates branch-owned code to master's post-rebase APIs:

- rebuild subprocess-local spawn.ts on master's tree-exit-observer
  machinery, keeping the branch's win32 childEnv key semantics and the
  Linux zombie-quiescence probe; the zombie test reaps its survivor
  directly since a confirmed-absent verdict is a permanent
  no-more-signals boundary
- migrate pty-local test stubs to the Inbox-model Agent interface,
  Session.create, runnerFailureRules, and the new turn/start payload
- implement the seam's resolveExecutable/spawnTerminal abstracts in the
  new pwsh-local and tool-fs-search test fakes
- restore code-runtime, atomic-write, pwsh-local, and app-boot to
  master's exact content (the net-zero code-runtime churn is pruned
  from this history) and drop rename-detection graft debris
- re-apply the PR's architecture rows and execution-world paragraph,
  re-record bilingual pairings, regenerate catalogs, and reconcile the
  lockfile

packages/ui/app-boot/tsdown.config.ts

@@ -1,6 +1,9 @@
 import { defineConfig } from 'tsdown'
 
-/** Bundle the host plugin and its dependency-free eval runner. */
+/**
+ * Embed Include while keeping Loader external so the built include tree and
+ * app host bind to one Loader peer.
+ */
 export default defineConfig({
   entry: ['lib/types/index.js', 'lib/types/invariant.js'],
   outDir: 'lib',
@@ -10,4 +13,7 @@ export default defineConfig({
   fixedExtension: false,
   dts: false,
   clean: false,
+  deps: {
+    alwaysBundle: ['@cordisjs/plugin-include'],
+  },
 })