feat: add desktop localization and memory view

[SudoJacky]

Summary

• add persistent English and Simplified Chinese app language settings using an extensible i18n resource structure
• add a desktop Memory page backed by a native memory snapshot command
• remove the obsolete stdio worker transport and other unreachable Rust APIs while retaining active diagnostics

Why

Tinybot needed a device-local language preference and a way to inspect current long-term memory. The Rust backend also retained a complete stdio worker path after the desktop runtime moved in-process, which produced widespread dead-code warnings and increased maintenance and test compilation overhead.

Impact

• users can switch the desktop UI between English and Simplified Chinese
• users can review user and workspace memory from the app
• default and all-feature Rust builds are warning-free
• the native source and test surface is reduced by about 2.8k lines without removing active diagnostics

Validation

• npm test -- --run (82 files, 530 tests)
• npm run build
• cargo test --manifest-path src-tauri/Cargo.toml --lib (884 tests)
• cargo check --manifest-path src-tauri/Cargo.toml --all-features --all-targets
• cargo build --manifest-path src-tauri/Cargo.toml --release

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Pass the selected locale to sidebar timestamps

When the user selects Chinese, session titles and controls in this sidebar are translated, but this call still omits the locale and localized no-date label. formatRelativeUpdatedTime therefore uses its English fallback strings such as 4 min, 2 hr, and No date, leaving every sidebar session timestamp untranslated; pass the active i18n language and translated no-date text here as the search results do.

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