feat(ux): 三个小改进——Esc 立即收起胶囊 / 概览复制按钮 / 历史页 ⌘R 刷新

[bigsongeth]

User description

三个互相独立的小体验改进，打包在一个 PR 里（各一个 commit）。

① Esc / 主动取消时胶囊立即消失

所有终止态原本共用 2000ms 延迟收起。给「主动取消」（Esc / 点 ✕）单开一条零延迟路径（CAPSULE_CANCEL_HIDE_DELAY_MS = 0），按 Esc 立刻回 Idle、由前端淡出动画收尾，观感「按下即消失」。完成 / 出错仍保留 2 秒（需要让用户看清结果 / 错误）。

② 概览「最近识别」每行加复制按钮

Overview.tsx 的 RecentRow 右侧加复制按钮，复用 History 的规则（润色文本为空时回退到识别原文），点击后图标变 ✓ 并显示「已复制」1.5s。顺带把共享 Btn 的 children 改为可选以便复用。

③ 历史页 ⌘R 刷新

History.tsx 已有键盘监听，加 ⌘R：preventDefault() 拦掉 webview 整页 reload，改为只重拉 listHistory()。

均通过 cargo check / tsc。

Co-Authored-By: Claude Opus 4.8 noreply@anthropic.com

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PR Type

Enhancement, Bug fix

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Description

• Esc / cancel immediately hides capsule (0ms delay)

• Overview "Recent" rows gain a copy button (fallback to raw transcript)

• History page ⌘R refreshes list without full reload

• Fix cancelled processing sessions not properly finishing (session id check)

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File Walkthrough

	Relevant files
Enhancement	coordinator.rs Add cancel-specific capsule hide delay constant                    openless-all/app/src-tauri/src/coordinator.rs Added CAPSULE_CANCEL_HIDE_DELAY_MS = 0 constant for immediate hide on cancel Updated comments to distinguish auto-hide vs cancel hide delays +7/-2      coordinator_state.rs Add state function for cancelled processing finish              openless-all/app/src-tauri/src/coordinator_state.rs Added finish_cancelled_processing_state with session id validation Added unit tests for matching and stale sessions +58/-0    History.tsx Add ⌘R refresh shortcut to history page                                    openless-all/app/src/pages/History.tsx Added ⌘R key binding to refresh history (preventDefault) Added refresh to useEffect dependency array +9/-2      Overview.tsx Add copy button to recent recognitions                                      openless-all/app/src/pages/Overview.tsx Added copy button to RecentRow with copied state and timeout Falls back to raw transcript if final text is empty Shows "copied"/"copy" text via Btn component +29/-3    _atoms.tsx Make Btn children optional                                                              openless-all/app/src/pages/_atoms.tsx Made children prop optional in BtnProps (added ?) +1/-1
Bug fix	dictation.rs Introduce finish_cancelled_processing for clean cancellation openless-all/app/src-tauri/src/coordinator/dictation.rs Added finish_cancelled_processing helper function Replaced direct set_phase_idle calls with finish_cancelled_processing for cancelled paths Used CAPSULE_CANCEL_HIDE_DELAY_MS for cancelled sessions +24/-13

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Persistent review updated to latest commit 9a0d230