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/interaction/README.zh.md

@@ -0,0 +1,15 @@
+# interaction/：人机协作平面
+
+[English](README.md) | 中文
+
+人与运行中的 agent（智能体）协作所经由的各个 seam——提问、审批、权限预设、命令。这些是**产品**包（package）：由用户直接操作的真实接口。
+
+| 包 | 职责 | ctx 键 |
+|---|---|---|
+| [`commands/`](commands/README.md) | 为交互式适配器注册并分派用户命令。 | `ctx.commands` |
+| [`user-approval/`](user-approval/README.md) | 协调一次性审批决策。 | `ctx.approval` |
+| [`permission/`](permission/README.md) | 呈现并持久化面向用户的权限预设。 | `ctx.permission` |
+| [`user-interaction/`](user-interaction/README.md) | 定义与提供方无关的用户问答 seam。 | `ctx.userInteraction` |
+| [`tool-ask-user/`](tool-ask-user/README.md) | 向模型公开用户问题。 | （注册到 `ctx.tools`） |
+
+这些包通过现有的 agent（智能体）和会话契约集成，而不改变循环。交互式应用提供具体的命令、审批和提问适配器；自动化使用 [`acp/`](../acp/README.md)，可运行的演示组合包位于 [`examples/`](../examples/README.md)。产品 [`dsh`](../../apps/cli/README.md) CLI（命令行界面）直接组合这些包。