ui: restore top-view intermediate image outputs

ui: input top-left, floorplan top-right, output image bottom

feat: two-step image gen, Dockerfile builds floorplan whl at deploy time

feat: integrate FloorPlan component into main app

feat: add FloorPlan demo app with default floor plan and 2 furnitures

fix: default FloorPlan to interactive mode

feat: add FloorPlan Svelte component with SVG rendering and drag interaction

chore: fix pyproject.toml metadata

feat: scaffold FloorPlan custom component, add Python backend

chore: ignore .worktrees directory

Update FloorPlan spec: fix coord mapping, clamping, pointercancel, label placement

Add FloorPlan component design spec

Add simple Gradio 6.9 app with basic image input

initial commit