fix(web): keep the approval scenario's goldens platform-neutral

The answered-transcript golden captured the OS's own refusal of the denied
first attempt — "bash: notes.txt: Operation not permitted" on macOS against
"bash: line 1: notes.txt: Read-only file system" on Linux — so it passed
locally and failed the Linux snapshot lane.

The scenario now keeps one golden (the waiting panel, platform-neutral) and
asserts the answered state on the world instead: the decided outcome, the file
the escalated command actually wrote, DONE, the panel gone, and the composer
re-enabled. The file assertion is stronger evidence than the transcript dump
it replaces — it proves the grant reached the executor.

.agents/notes/implemented/bug-fix/2026-07-30-approval-panel-command-cap.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 .agents/notes/implemented/bug-fix/2026-07-30-approval-panel-command-cap.md
-2026-07-30-approval-panel-command-cap.md: a9282f132e655833cfe687409c287c5afd538d50
-2026-07-30-approval-panel-command-cap.zh.md: 7eb40942e10134d43478e53e06c584bb97d3bb8f
+2026-07-30-approval-panel-command-cap.md: f16edd337a568bc5eb8e2f0d5ca04158a77f6cdf
+2026-07-30-approval-panel-command-cap.zh.md: c41589d07dd617f61c89ce2182d274477ea78b86

.agents/notes/implemented/bug-fix/2026-07-30-approval-panel-command-cap.md

@@ -43,6 +43,8 @@ Confirmed both directions against the built client. With the cap reverted, the r
 
 Reproducing the off-screen buttons needs a card taller than the scrollport, not merely a tall card. The composer seat is `position: sticky; bottom: 0`, so while the card still fits it stays pinned to the viewport bottom and the buttons remain visible — at 900x1000 the uncapped card ate the whole transcript yet kept its action row on screen. Only once the card outgrows the scrollport does sticky stop being able to hold the bottom edge, and the row goes under.
 
-The geometry block and the goldens are replay-only, so record mode reaches the fixture write instead of aborting on layout.
+The geometry block and the golden are replay-only, so record mode reaches the fixture write instead of aborting on layout.
+
+The scenario keeps exactly one golden — the waiting panel — and asserts the answered state on the world instead (the decided outcome, the file the escalated command wrote, `DONE`, the panel gone, the composer re-enabled). An answered-transcript golden was recorded first and failed on Linux CI: the denied first attempt renders the OS's own refusal, and that text is platform-specific (`bash: notes.txt: Operation not permitted` on macOS against `bash: line 1: notes.txt: Read-only file system` on Linux). Any scenario whose transcript contains a sandbox-denied command inherits that, so the denial belongs in assertions, never in a golden.
 
 The panel ships as a client-module bundle: `pnpm run build:web` alone does not pick up a change to `ApprovalPanel.module.css` or a new `data-` hook in `ApprovalPanel.tsx` — the package build must run first, or the browser lane asserts against an older client than the tree.

.agents/notes/implemented/bug-fix/2026-07-30-approval-panel-command-cap.zh.md

@@ -45,4 +45,6 @@ Status: implemented
 
 几何断言块与 golden 仅在回放模式下执行，这样录制模式才能走到写入 fixture 那一步，而不是在布局检查处中断。
 
+该场景只保留一份 golden —— 等待中的面板；回应之后的状态改为对世界作断言（决策结果、越权命令写出的那个文件、`DONE`、面板消失、输入框重新可用）。最初还录了一份"已回应会话流"的 golden，它在 Linux CI 上失败了：第一次被拒绝的尝试渲染的是操作系统自己的拒绝文本，而这段文本因平台而异（macOS 为 `bash: notes.txt: Operation not permitted`，Linux 为 `bash: line 1: notes.txt: Read-only file system`）。任何会话流中含有被沙箱拒绝命令的场景都会继承这一点，因此这类拒绝只能进断言，绝不能进 golden。
+
 该面板以客户端模组包的形式发布：单跑 `pnpm run build:web` 不会带上对 `ApprovalPanel.module.css` 的改动，也不会带上 `ApprovalPanel.tsx` 中新增的 `data-` 钩子——必须先执行包构建，否则浏览器测试通道会对着一个比工作树更旧的客户端做断言。