Add a no-build, same-origin web frontend so an operator can open a URL,
see every agent's state, and answer a paused question with no terminal
(Phase 3 DoD). The UI is a client of the existing API — no endpoint,
schema, or auth change — so the 106 existing tests pass unchanged.
- app.py serves the bundled UI from / and /static, gated on UI_ENABLED
(default on); optional CORS_ORIGINS (default empty => no middleware)
for hosting the UI on a separate origin. Dedicated /static prefix +
explicit / route so API routes are never shadowed. Zero new runtime
deps (StaticFiles/CORSMiddleware ship with Starlette).
- static/: vanilla fetch + plain CSS + vendored alpine.min.js (v3.14.8,
no CDN). Token captured once into localStorage; all API values render
via x-text (never x-html) to block agent-authored markup injection.
Project switcher, agent list, checkmark panel, paginated log, shared
feed, and Answer / Answer & Resume. Polling scoped to the selected
agent to avoid an N+1 over the fleet.
- config.py: ui_enabled, cors_origins (+ cors_origin_list); documented
in .env.example.
- tests/test_api_ui.py: serving, unauthenticated shell, non-shadowing
401 regression, CORS toggle, UI_ENABLED=false. 114 tests, ruff clean.
The static assets ship in the wheel by default (they live inside the
packaged src/handler tree) — no force-include needed.
