修复热键设置加载失败后永久 loading

[H-Chris233]

User description

变更内容

• 修复 HotkeySettingsContext.refresh() 任一 IPC 失败后 loading 永远不释放的问题。
• 新增 context 级 error，refresh() 使用 finally 保证退出 loading，并保留成功返回的 prefs/capability 半边状态。
• 在翻译页展示“设置加载失败”错误和重试按钮，避免用户只看到永久加载态。
• 补齐新增错误/重试文案的简中、繁中、英文、日文、韩文翻译。

验证

• git diff --check
• cd openless-all/app && npm run build
• cd openless-all/app && cargo check --manifest-path src-tauri/Cargo.toml（仅既有 warning）

Closes #316

---

PR Type

Bug fix, Enhancement

---

Description

• Fix permanent loading state on IPC failure using Promise.allSettled and finally

  • Always release loading even when one call rejects
  • Keep partially successful data (prefs or capability)

• Add error state to HotkeySettingsContext for consumers

• Show localized error alert and retry button in Translation page

• Add retry and settingsLoadFailed keys to all five locales

---

Diagram Walkthrough

flowchart LR
  A["HotkeySettingsProvider.refresh()"] --> B["Promise.allSettled(getSettings, getHotkeyCapability)"]
  B -- "fulfilled" --> C["setPrefs / setCapability (partial success)"]
  B -- "rejected" --> D["setError(reason)"]
  C --> E["finally { setLoading(false) }"]
  D --> E
  E --> F["Context value updated with error"]
  F --> G["Translation page shows alert + retry button"]

Loading

File Walkthrough

	Relevant files
Enhancement	5 files en.ts Add retry and load failure i18n keys                                          +2/-0      ja.ts Add retry and load failure i18n keys                                          +2/-0      ko.ts Add retry and load failure i18n keys                                          +2/-0      zh-CN.ts Add retry and load failure i18n keys                                          +2/-0      zh-TW.ts Add retry and load failure i18n keys                                          +2/-0
Bug fix	2 files Translation.tsx Display error alert and retry on load failure                        +69/-2    HotkeySettingsContext.tsx Handle IPC failures with error state and finally                  +34/-5

---

[github-actions]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

🎫 Ticket compliance analysis ✅ 316 - PR Code Verified Compliant requirements: refresh() now always clears loading in finally. Context value now exposes error. Translation renders a localized failure message and retry button. Localized retry and settingsLoadFailed strings were added. Partial prefs/capability updates are preserved on mixed success/failure. Requires further human verification: Verify the new error/retry UI in Translation behaves correctly in the browser after failed, partial, and successful refreshes.

⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ No major issues detected