feat(terminal): press R to reconnect disconnected sessions

[htazq]

Summary

• allow R / r to reconnect only the active disconnected terminal
• keep connected terminal input unchanged and ignore modified, repeated, or IME key events
• honor the existing Auto Reconnect setting when a PTY connection closes
• show localized manual reconnect guidance after automatic reconnect is disabled or exhausted

Verification

• pnpm test src/__tests__/pty-terminal-activation.test.tsx src/__tests__/terminal-tab-portals.test.tsx src/__tests__/keyboard-shortcuts-hook.test.tsx src/__tests__/keyboard-shortcuts.test.ts (40 passed)
• pnpm exec tsc --noEmit
• pnpm exec eslint src/components/pty-terminal.tsx src/components/terminal/terminal-tab-portals.tsx --quiet
• pnpm i18n:check
• pnpm build

Full pnpm test: 476 passed; the 7 existing src/__tests__/connection.test.ts cases still require a Tauri runtime and fail in plain Vitest because window.__TAURI_INTERNALS__.invoke is unavailable.

Closes #12

[Copilot]

Pull request overview

This PR adds a keyboard-first reconnect workflow for terminal tabs by allowing R/r to trigger reconnect only when the active terminal is in a disconnected state, while also aligning PTY disconnect messaging with the existing Auto Reconnect setting and new localized guidance strings.

Changes:

• Add a scoped onKeyDown handler so R/r reconnects only the active disconnected terminal tab (ignoring repeats, modifiers, and IME/composition events).
• Respect the persisted Auto Reconnect setting when the PTY WebSocket closes; when disabled, stop retrying and prompt for manual reconnect.
• Introduce localized terminal guidance strings for manual reconnect and exhausted auto-reconnect attempts (EN + zh-CN), and add test coverage for the new behaviors.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/components/terminal/terminal-tab-portals.tsx	Adds the R/r reconnect key handler gated to active + disconnected terminal tabs.
src/components/pty-terminal.tsx	Honors Auto Reconnect on WS close and prints localized manual reconnect guidance when applicable.
src/locales/en.json	Adds new ptyTerminal.* strings for reconnect guidance.
src/locales/zh-CN.json	Adds Chinese translations for the new reconnect guidance strings.
src/tests/terminal-tab-portals.test.tsx	Tests that only the active disconnected tab reconnects on an unmodified R key.
src/tests/pty-terminal-activation.test.tsx	Tests that auto-reconnect stops when disabled and manual guidance is printed.