v0.2.1

Bug-fix + polish release.

Fixes

Plugin now loads when installed as @beihaizb/dsh-notebook (#1)
- cordis.patch.yml referenced the unscoped dsh-notebook, which could not resolve against the scoped npm package, taking down the whole plugin tree (Failed to load plugins).
- Both the host patch name and the client self-register id now use @beihaizb/dsh-notebook, matching @beihaizb/dsh-envsel's working setup.
"Hand to AI" now actually reaches the agent
- A local variable (var t) shadowed the i18n translator t() after the v0.2.0 i18n refactor, throwing TypeError before the draft was submitted — the AI never received the cell code or request. Renamed the local to txt.

Theme-aware cell editor: the CodeMirror editor follows the DSH light/dark theme — oneDark in dark mode, a clean light scheme with soft-gray line numbers in light mode — and re-themes live (MutationObserver) when you switch themes.
Localized CPU-hint snippet: the copy-ready psutil snippet's comments now follow the UI language (EN / 中文) instead of being hardcoded Chinese.
@codemirror/language added as an explicit dependency for the light-mode syntax highlighting.

dsh plugin --profile web add @beihaizb/dsh-notebook

Then restart dsh web. A Notebook tab appears at the top of the session.