refactor(packages): dissolve ui/ and rename sdk/ to scaffold/

git mv per the regrouping RFC: the five human-collaboration seams and
tui join packages/interaction/, app-boot becomes packages/boot/, and
jsonrpc joins the renamed scaffold/ (formerly sdk/) as its server half
beside client/protocol/create-sdk/helper/scripts/telemetry, whose
folders drop the legacy sdk- prefix. Three new group README triplets
replace the ui/ and sdk/ ones; tsconfig references/paths/globs,
knip keys, vitest globs, gate scripts, catalogs, docs, and the
lockfile follow. Adds the four settled FIXME rename markers
(dsh-sdk-server, dsh-sdk-telemetry, dsh-sdk-helper, dsh-sdk-scripts).

The scaffold folders diverge from their npm names until those renames
land, so tsconfig.base.json maps the three affected names explicitly
beside the group wildcard. Also repairs two pre-existing stale-path
classes the strengthened sweep surfaced: docs/web-styling.md's retired
web-ui host package and type-model spec fixture-literal joins.

app-boot's three Loader-composition specs time out at the default 5s
under full-suite parallel load on this filesystem (pre-existing;
pass isolated with --testTimeout=30000); interaction/scaffold/boot
suites otherwise green (687 passed).

packages/scaffold/README.zh.md

@@ -0,0 +1,17 @@
+# scaffold/：从外部创建、启动、驱动项目
+
+[English](README.md) | 中文
+
+本组包含 Harness 项目的开发者工具，以及从另一进程驱动 Harness 运行时的客户端栈。目录按角色命名，不带遗留的 `sdk-` 前缀；npm 名则经由[重新分组 Agent Note（agent 决策记录）](../../.agents/notes/proposed/architecture/2026-07-29-package-regrouping.md)中 FIXME 跟踪的改名收敛为 `dsh-sdk-*`。
+
+| 包 | 职责 |
+|---|---|
+| [`helper/`](helper/README.md) | 提供共享的项目编辑领域 |
+| [`scripts/`](scripts/README.md) | 提供 `dsh-sdk` 项目命令 |
+| [`create-sdk/`](create-sdk/README.md) | 创建新的 SDK 项目 |
+| [`protocol/`](protocol/README.md) | 定义 SDK 运行时通信协议 |
+| [`client/`](client/README.md) | 通过 TypeScript 客户端 API 驱动 Harness 运行时 |
+| [`server/`](server/README.md) | 通过 stdio JSON-RPC 为进程外 SDK 客户端提供服务 |
+| [`telemetry/`](telemetry/README.md) | 提供启动器 telemetry、同意与脱敏原语 |
+
+`@deepseek-ai/create-sdk` 遵循 npm 的 scoped initializer 命名约定；其余包遵循仓库的 `@deepseek-ai/dsh-*` 约定。参见[开发者项目工作流](../../.agents/notes/proposed/feature/2026-07-14-sdk-developer-projects.md)、[项目编辑架构](../../.agents/notes/proposed/architecture/2026-07-15-sdk-project-editing-architecture.md)与 [TypeScript SDK 设计](../../.agents/notes/implemented/feature/2026-07-27-typescript-sdk-and-sdk-subagent-backend.md)。