chore: prepare GoodBuddy 0.12.7 and Agent 0.11.21 releases

Set the approved Desktop and Agent versions and package the approved Chinese
and English notes without changing published release history. Keep OpenCode
pinned to 1.18.29 and require Desktop 0.12.7 before the new Agent package.

Align both feature lists and affected design documents with reference-image
editing, inherited expert work modes, preview boundaries, and remaining
release acceptance. Application navigation remains design-only. No LoongArch
preview is planned for this release; Agent publication remains non-Latest.

The first candidate full run exposed a browser test clicking Send before it
was enabled. Wait for startup readiness using the existing test convention;
production code is unchanged by this release-preparation commit.

Validation: final full suite 3597 passed, 0 failed, 61 skipped across 338 files.
Typecheck, lint, bilingual release-note validation, version consistency,
unchanged historical notes, whitespace and relative-link checks passed.
No additional real model calls, local production builds, pushes or tags.
Concurrent navigation, workbar and roadmap design edits are not included.

docs/features/direct-model-agent/technical-design.md

@@ -19,7 +19,9 @@
 - `ModelToolProvider` 的直连模型内置工具、浏览器、Web、知识和自定义 MCP 聚合。
 - `WorkspaceAccess` 的本机和远端工作区抽象。
 - 跨平台子进程树终止辅助函数。
-- 面向用户专家协作的 `SubagentScheduler`、状态事件和只读模型调用。
+- 面向用户专家协作的 `SubagentScheduler` 和状态事件。专家使用具备已启用本机能力的
+  直连模型 Runtime，继承父请求 Ask/Execute 及 authorizer，工具事件记入子任务；
+  Ask 保持只读，不把这些本机工具表述为远程 OpenCode 子会话。
 - OpenCode、Continue 和 DeepSeek Harness 各自的 Shell/Agent 能力。
 - 直连模型 `process_execute` 和 `subagent_delegate`。
 - 不创建顶层 Task/Conversation 的编程 Subagent actor 与活动归并。