The Sessions chooser already shows every running session with a live thumbnail
and Open + New session, so fold delete into it and drop the separate page:
- add a Kill ✕ button to each session card (DELETE /live-sessions/:id + refresh),
reusing makePreviewCard's extraActions and the existing .mg-kill style
- remove public/manage.html + public/manage.ts and the esbuild manage entry
- remove the 🗂 toolbar button (main.ts) and the 🗂 Manage header link (launcher.ts)
Backend DELETE/preview routes stay (used by the launcher kill, thumbnails, and
the project pages). Frontend + build-config only.
Verified: full suite 453 green, web typecheck clean, build:web emits only main
(no manage.* artifacts), and in-browser the Sessions cards have Open + Kill (2→1
on kill), no Manage entry, and GET /manage.html → 404.
bf5241e87b