* Polish design system home flows
* Polish home prompt presets
* Polish home working directory controls
* test: align home hero chrome smoke
* fix: stabilize home composer ci checks
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Co-authored-by: qiongyu1999 <2694684348@qq.com>
* feat(web): redesign Designs tab cards — covers, tags, overflow menu, multi-select
- Render real previews on project cards: HTML iframe / image / video / hashed gradient fallback with project initial; lazily fetches the project's primary file when metadata.entryFile is unset, prefers index.html → newest html → image → video.
- Live artifact card thumbnails embed the rendered artifact URL via sandboxed iframe.
- Replace the per-card close button with a `…` overflow menu (Rename, Delete) that opens on hover/click; click-outside and Esc close it.
- Add multi-select mode (toolbar toggle → checkbox per card → "N selected · Delete · Cancel" pill) with batch delete via the existing onDelete prop.
- Add a category tag to every card (Prototype / Live Artifact / Slide / Media) derived from project.metadata.intent / kind / skillId.
- Replace browser prompt() and confirm() with custom modals (rename input + danger-confirm) reusing the existing .modal shell.
- Add `more-horizontal` icon and 16 new i18n keys across all 18 locales (zh-CN/zh-TW localized; others fall back to English).
* test(e2e): update home delete flow for overflow menu + custom confirm modal
The previous flow targeted a per-card X button labelled "delete project <name>"
and asserted on a native `dialog` event. The card UI now exposes a `…` overflow
menu and a styled confirm modal, so reach delete via the menu and assert against
the modal's Cancel / Delete buttons instead.
* fix(web): harden Designs tab preview sandbox
* fix(web): hide Designs select mode in kanban
