Merge remote-tracking branch 'upstream/master' into feat/web-inline-file-mentions

# Conflicts:
#	packages/client/ui-conversation/README.i18n.yaml
#	packages/client/ui-primitives/README.i18n.yaml

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: a5f35c9a41008921c6a1e3a4de3fd3f38af926c0
-README.zh.md: 54c70ed29e73e196a9be60ddb794c12187dbe0c5
+README.md: e6ca935426903ec0cc99f3fcacc1f937aa60b4ba
+README.zh.md: 4c23e7bd78a8ddde3e3cfe354203e81d3bb5b5e1

packages/client/ui-primitives/README.md

@@ -6,7 +6,7 @@ Pure React atoms (zero cordis): StateDot, ic_ds_* icons, Button/Pill/Menu/Modal/
 
 ## Hover cards
 
-`HoverCard` keeps its portaled preview reachable across the anchor gap with a pointer-leave grace. A consumer may also pass `copyText`: the card then exposes button semantics for pointer and keyboard activation, includes that value after the `copyLabel` prefix in its accessible name, writes the exact value through the package clipboard helper, and temporarily replaces its content with `copiedLabel` only after the host accepts the write. A non-collapsed text selection intersecting the card suppresses pointer-click activation, while success feedback retains the original card height and clears when the card closes or after one second. `copyLabel` and `copiedLabel` are label props because this zero-cordis atom cannot read the application locale; omitting `copyText` preserves the read/select-only card. Rationale: [the hover-card copy note](../../../.agents/notes/implemented/feature/2026-07-31-hover-card-click-copy.md).
+`HoverCard` keeps its portaled preview reachable across the anchor gap with a pointer-leave grace. A consumer may also pass `copyText`: the card then exposes button semantics for pointer and keyboard activation, includes that value after the `copyLabel` prefix in its accessible name, writes the exact value through the package clipboard helper, and temporarily replaces its content with `copiedLabel` only after the host accepts the write. A non-collapsed text selection intersecting the card suppresses pointer-click activation, while success feedback retains the original card height and clears when the card closes or after one second. `copyLabel` and `copiedLabel` are label props because this zero-cordis atom cannot read the application locale; omitting `copyText` preserves the read/select-only card. Historical rationale: [the archived hover-card copy note](../../../.agents/notes/archived/feature/2026-07-31-hover-card-click-copy.md).
 
 ## Markdown rendering
 

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

@@ -6,7 +6,7 @@
 
 ## 悬浮卡片
 
-`HoverCard` 通过指针离开宽限期，让采用 portal 渲染的预览在跨越与锚点之间的间隙时仍可抵达。消费方还可传入 `copyText`：此时卡片为指针与键盘激活提供按钮语义，其无障碍名称会在 `copyLabel` 前缀后包含该值，通过包内剪贴板辅助函数原样写入该值，并且只有宿主接受写入后，才会临时将内容替换为 `copiedLabel`。与卡片相交的非折叠文本选区会阻止指针点击激活；成功反馈保持卡片原有高度，并随卡片关闭或在一秒后清除。`copyLabel` 和 `copiedLabel` 采用 label prop，是因为这个 zero-cordis 原子组件无法读取应用 locale；省略 `copyText` 时，卡片维持只读且可选择文本的行为。理由见[悬浮卡片复制 Agent Note](../../../.agents/notes/implemented/feature/2026-07-31-hover-card-click-copy.md)。
+`HoverCard` 通过指针离开宽限期，让采用 portal 渲染的预览在跨越与锚点之间的间隙时仍可抵达。消费方还可传入 `copyText`：此时卡片为指针与键盘激活提供按钮语义，其无障碍名称会在 `copyLabel` 前缀后包含该值，通过包内剪贴板辅助函数原样写入该值，并且只有宿主接受写入后，才会临时将内容替换为 `copiedLabel`。与卡片相交的非折叠文本选区会阻止指针点击激活；成功反馈保持卡片原有高度，并随卡片关闭或在一秒后清除。`copyLabel` 和 `copiedLabel` 采用 label prop，是因为这个 zero-cordis 原子组件无法读取应用 locale；省略 `copyText` 时，卡片维持只读且可选择文本的行为。历史依据见[已归档的悬浮卡片复制 Agent Note](../../../.agents/notes/archived/feature/2026-07-31-hover-card-click-copy.md)。
 
 ## Markdown 渲染