fix: sync archived sessions and macOS locale

[wisdomqin]

What changed

• Refresh the mobile session list from the workspace archive state, so sessions archived on Desktop disappear on phone after refresh.
• Configure Electron native dialogs with the resolved DSH locale and package both Electron Chinese locale name variants.
• On first launch, use the first macOS preferred system language when no explicit DSH language preference exists.

Root cause

The mobile page read archived IDs from session.list while the authoritative archive state is returned with workspace.list. The Desktop locale helper also treated a settings file without an explicit language as English, and Electron was not given a locale before native dialogs were created.

User impact

• Desktop-archived sessions no longer remain visible on the phone after refresh.
• Native file selection follows Chinese when DSH resolves to Chinese.
• A fresh Mac installation follows the system preferred language instead of defaulting to English. Explicit user language choices still take precedence.

Validation

• pnpm test: 17 files, 84 tests passed
• pnpm typecheck
• pnpm build
• git diff --check