fix(client-web): reject unknown web kind, lock fixture to contract, observe web card in boot smoke

- webCardModel returns null for an unknown web `kind` (wire from a newer host)
  instead of drawing it as a malformed fetch, matching the unknown-`card` and
  terminal-model wire-boundary default.
- Fixture WEB_SEARCH_RESULT/WEB_FETCH_RESULT and the source type derive from the
  contract's ToolResultView via Extract, so a new contract field fails at the
  type level rather than drifting silently.
- built-boot smoke asserts the web_search/web_fetch turns render their keyed
  WebRow cards, giving the registration and wire projection an assembled check.
- DetailsPanel comment no longer claims the card omits content for search.
- ui-primitives README inline-Chinese limitation now lists WebBlock's controls.

packages/client/ui-primitives/README.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/client/ui-primitives/README.md
-README.md: b5b79f7f0d01afb2d06fb18bf30131cbdda75ca2
-README.zh.md: b10183496479249346da5da808f5ab3b6d2eef67
+README.md: 099da3ae3d4e2b45507fd18d279650ef0525f36a
+README.zh.md: dc7fa5f78ea758cea75e86eefb0c06ebe92e61d2

packages/client/ui-primitives/README.md

@@ -29,5 +29,5 @@ None; this package neither assembles nor sends a provider request.
 - **Glyph-level icons are redrawn approximations** — the fish logo (and the sparkle held by ui-conversation) come from font glyphs whose vector geometry is not exportable from the local design data; hand-authored recreations stand in until an exact export path exists.
 - **Pill and Input have no design source** — both atoms are self-defined; the sidebar search field and view-tab strip that resemble them are consumer-owned compositions, not these atoms.
 - **StateDot `Active` variant is a hidden placeholder in the design** — not implemented; the four shipped states (done/warning/ongoing/error) are the complete P-I surface.
-- **This package's user-facing copy is inline Chinese, not localized** — the atoms are zero-cordis and so cannot reach `ctx.locale`; `TerminalBlock`'s exit-code and signal pills, its copy and expand controls, and `CodeBlock`'s copy control are all hardcoded. This matches the repo-wide state the locale package records (only the Settings surface is translated); extracting these into the `zh`/`en` dictionaries needs a localization channel for zero-cordis atoms and belongs to that repo-wide extraction.
+- **This package's user-facing copy is inline Chinese, not localized** — the atoms are zero-cordis and so cannot reach `ctx.locale`; `TerminalBlock`'s exit-code and signal pills, its copy and expand controls, `CodeBlock`'s copy control, and `WebBlock`'s source expand/collapse controls and its source-list and fetch truncation notes are all hardcoded. This matches the repo-wide state the locale package records (only the Settings surface is translated); extracting these into the `zh`/`en` dictionaries needs a localization channel for zero-cordis atoms and belongs to that repo-wide extraction.
 - **`TerminalBlock` is not a terminal emulator** — it renders settled or still-running command output, not an interactive session: SGR color and attributes are honored, and so are the in-line cursor movements a progress line uses — carriage return, backspace, erase-in-line, tab stops and character width. Absolute cursor positioning, screen clearing, and alternate-screen sequences are stripped. Basic-16 magenta and cyan have no token equivalent and stay literal rgb.

packages/client/ui-primitives/README.zh.md

@@ -28,5 +28,5 @@
 - **字形级图标是重新绘制的近似版本**：鱼形标志（以及 ui-conversation 持有的闪光图标）来自字体字形，而本地设计数据无法导出其矢量几何；在获得精确导出路径前，使用手工重建版本代替。
 - **Pill 与 Input 没有设计来源**：两个原子组件均自行定义；与其相似的侧边栏搜索字段和视图标签条由消费方组合，不是这些原子组件。
 - **StateDot 的 `Active` 变体是设计中的隐藏占位符**：尚未实现；已交付的四种状态（done/warning/ongoing/error）构成完整的 P-I 表层。
-- **本包面向用户的文案是内联中文，未做本地化**：这些原子组件是 zero-cordis 的，因此拿不到 `ctx.locale`；`TerminalBlock` 的退出码与信号胶囊、它的复制与展开控件，以及 `CodeBlock` 的复制控件全部硬编码。这与 locale 包记录的全仓现状一致（只有 Settings 表面做了翻译）；把它们抽取进 `zh`/`en` 字典需要为 zero-cordis 原子组件提供一条本地化通道，属于那次全仓抽取的范围。
+- **本包面向用户的文案是内联中文，未做本地化**：这些原子组件是 zero-cordis 的，因此拿不到 `ctx.locale`；`TerminalBlock` 的退出码与信号胶囊、它的复制与展开控件、`CodeBlock` 的复制控件，以及 `WebBlock` 的来源展开/收起控件与它的来源列表与 fetch 截断提示，全部硬编码。这与 locale 包记录的全仓现状一致（只有 Settings 表面做了翻译）；把它们抽取进 `zh`/`en` 字典需要为 zero-cordis 原子组件提供一条本地化通道，属于那次全仓抽取的范围。
 - **`TerminalBlock` 不是终端模拟器**：它渲染已结束或仍在运行的命令输出，而不是交互式会话：SGR 颜色与属性会被遵循，进度行所用的行内光标移动同样被遵循——回车、退格、行内擦除、制表位与字符宽度。绝对光标定位、清屏与备用屏幕序列会被剥离。基础 16 色中的洋红与青色没有对应 token，保持字面 rgb。