Merge refreshed typed Code Mode results into result card fix

# Conflicts:
#	.agents/notes/implemented/architecture/2026-07-20-canonical-tool-output-contract.i18n.yaml
#	.agents/notes/implemented/feature/2026-07-20-code-mode-typed-tool-returns.i18n.yaml
#	examples/acp-agent/tests/snapshots/code-mode-workspace-context/session.jsonl
#	examples/tui-agent/tests/snapshots/code-mode/terminal.expected.txt

.agents/notes/implemented/architecture/2026-07-20-canonical-tool-output-contract.zh.md

@@ -54,6 +54,7 @@ type ToolExecutionResult =
 | `skill` | `{ name, provider, resourceBase?, content }` |
 | `todo_write` | `{ todos, counts }` |
 | `ask_user_question` | `{ answers: [{ id, selected, custom? }] }` |
+| `exit_plan_mode` | `{ approved: true }` |
 | `cordis_inspect` ／ `cordis_mount` ／ `cordis_unmount` | 检查文本或类型化的动态挂载句柄 |
 | `structured_output` | `{ recorded: true }` |
 | `run_code` | `{ logs: string[], result?: JsonValue }` |