emrg: GUI new-session dialog + delete-project protected guard — P5 slice 2 (GUI multi-session rant P5)

[argszero]

P5 slice 2 of the GUI multi-session rant (2026-08-10T15:07:19): new-session dialog + delete-project with protected guard.

New-session dialog (showNewSessionDialog)

• Pick an existing project (active order) → App.newSession({projectPath}) creates a session in that project
• Bottom "＋ New project…" → pickProjectDir → registerProject (G121 writability check) → new session in the new project (lightweight command implicit _touch_project, no init_auto_evolve)
• Entry: "＋ New session…" button at top of the open-session dialog + #new-session-dialog in index.html

Delete project (open-session dialog project rows)

• Protected guard: built-in project emrg / built-in task emrg-task → "system project cannot be deleted" hint, API not called; .emrg is a _touch_project history record (NOT built-in) → deletable
• Confirm dialog (on-disk data kept, re-registerable) → new emrg:removeProject IPC → daemon remove_project (P1) → closes that project's open session connections + removes bookkeeping + persists (debounced gui_state) + broadcast; if the active session was closed, renderer switches to nearest open session or creates a new one

Slice-1 gap fixed: per-session projectPath threading — switchSession/sendMessage now use the session's project path as cwd (not the global projectDir), so cross-project open/resume and first-message creation land in the correct project dir.

i18n zh/en 11 keys; +3 renderer.smoke tests (52→55); GUI 169→172, 680 pytest green, doc counts synced.

[argszero]

✅ LGTM — cycle 20260810-182448. P5 slice 2 complete: new-session dialog (existing/new project, G121 + implicit _touch_project, no init_auto_evolve), delete-project with protected guard (emrg/emrg-task; .emrg deletable) + confirm + active-switch-away, and the slice-1 gap fix (per-session projectPath threading through switchSession/sendMessage so cross-project sessions use the correct cwd). GUI 172/172, pytest 680, doc counts synced.

[argszero]

✅ LGTM — cycle 20260810-184049. Re-verified on head 7453d0a: GUI 172/172 pass, pytest 680, CI green. New-session dialog (existing/new project with G121 + implicit _touch_project), delete-project protected guard (emrg/emrg-task; .emrg deletable), per-session projectPath threading — all correct.

[argszero]

✅ LGTM — cycle 20260810-184006. Reviewed full diff: new-session dialog (existing project → newSession({projectPath}); new project → pickProjectDir + registerProject + new), delete-project protected guard (emrg/emrg-task protected, .emrg deletable) with confirm dialog + active-session switch-away, removeProject IPC closes that project's open connections + persists + broadcasts, and the slice-1 gap fix (per-session projectPath threaded through switchSession/sendMessage/newSession so cross-project sessions use the correct cwd). evolution_prompt.md entries for #641/#642 match merged state. Verified locally: node --check clean; GUI 172/172 (169+3); pytest 680/680 incl. doc-count guard.

[pm25coder]

Tested P5 slice 2 end-to-end on the branch (base c283e14, 2 commits incl. the quick-ref PR-number fix):