fix(rebase): migrate the replayed E2B branch onto the rebased parent

The linear replay carried old-lineage content over parent-owned files;
this checkpoint restores them and adapts the branch to the parent's
post-rebase seam:

- restore all pty/lsp/subprocess/code-runtime surfaces to the parent's
  exact content (this branch claims none of them) and drop the net-zero
  code-runtime-e2b/pty-e2b/lsp-e2b residue and its registrations
- widen serializeRemoteEnvironment to the seam's NodeJS.ProcessEnv
  tombstone contract: an explicit undefined removes an ambient entry
- migrate the two E2B fixture Agent stubs to the Inbox-model interface
  and Session.create
- re-apply the branch's gen-doc-graphs roles, THIRD_PARTY_NOTICES e2b
  row, and packages/README group row (trimmed to the doc budget);
  regenerate catalogs and re-record bilingual pairings

docs/config-catalog.md

@@ -399,6 +399,22 @@ export interface Config {
 
 Source: [`packages/credentials/credentials-local/src/index.ts:54`](../packages/credentials/credentials-local/src/index.ts)
 
+## `@deepseek-ai/dsh-e2b`
+
+```ts config-catalog
+/** Configuration for the shared E2B sandbox owner. */
+export interface Config {
+  /** API key; omission reads `E2B_API_KEY`. It is never forwarded into the sandbox. */
+  apiKey?: string
+  /** Shared remote working directory, created before adapters receive the sandbox. */
+  cwd?: string
+  /** E2B sandbox lifetime in milliseconds; expiry always deletes the sandbox. */
+  timeoutMs?: number
+}
+```
+
+Source: [`packages/e2b/e2b/src/index.ts:43`](../packages/e2b/e2b/src/index.ts)
+
 ## `@deepseek-ai/dsh-frontend-static`
 
 Requires: `httpServer`
@@ -2587,6 +2603,7 @@ These load from a `cordis.yml` entry with no `config:` block; they declare no co
 - `@deepseek-ai/dsh-command-feedback` — requires `commands` ([`packages/feedback/command-feedback/src/index.ts`](../packages/feedback/command-feedback/src/index.ts))
 - `@deepseek-ai/dsh-command-goal` — requires `commands` · `goals` ([`packages/goal/command-goal/src/index.ts`](../packages/goal/command-goal/src/index.ts))
 - `@deepseek-ai/dsh-commands` ([`packages/ui/commands/src/index.ts`](../packages/ui/commands/src/index.ts))
+- `@deepseek-ai/dsh-fs-e2b` — requires `e2b` ([`packages/e2b/fs-e2b/src/index.ts`](../packages/e2b/fs-e2b/src/index.ts))
 - `@deepseek-ai/dsh-fs-policy` ([`packages/fs/fs-policy/src/index.ts`](../packages/fs/fs-policy/src/index.ts))
 - `@deepseek-ai/dsh-goal-session` — requires `agents` · `goals` · `sessions` ([`packages/goal/goal-session/src/index.ts`](../packages/goal/goal-session/src/index.ts))
 - `@deepseek-ai/dsh-host-directory-picker-auto` — requires `httpServer` · `loader` ([`packages/host/directory-picker-auto/src/index.ts`](../packages/host/directory-picker-auto/src/index.ts))