docs(plan): record acestep api correction at task c1

refactor(pipeline): rewrite for real acestep AceStepHandler+LLMHandler api

fix(pipeline): correct hf model id to acestep-v15-xl-sft

test(smoke): add gpu smoke for minimum generate path

fix(ui): inline-muted component labels + drop broken tablet rail mode

feat(app): wire generate tab end-to-end to ace-step backend

feat(ui): add generate tab builder with prompt/lyrics/duration/vocal mode

feat(backend): add ace-step studio backend with dispatch + zerogpu wrap

feat(modes): add generate mode handler with input validation

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