feat(pipeline): lazy ace-step singleton with device-aware load

docs(plan): update task c5 wiring for sidebar architecture

docs: track spec + mockups + model research

docs(plan): add wireframe compliance section + correct task b3

fix(ui): replace gr.Tabs with sidebar nav per wireframes

chore(fmt): apply ruff format and remove unused import in conftest

feat(app): bootstrap gradio blocks with brutalist mono chrome

feat(ui): add brutalist mono theme tokens and responsive css

feat(pipeline): add device autodetect with mps-safe vram limit

ci: add github actions for ruff + pytest l1+l2

test: add pytest scaffolding

docs: add readme with hf space frontmatter and quick start

docs: add claude/agents/skills guides with sole-author rule

chore: pin deps with mac vs cuda ace-step branching

chore: add setup.sh with mac vs cuda branching

chore: add pyproject with ruff and pytest config

chore: init repo with mit license and gitignore