Add visual harmonization tests for editor UI components and ground finish chooser

- Implemented `test_editor_visual_harmonization.gd` to validate the Stickman editor and prop editor UI layouts, ensuring proper functionality and visual consistency.
- Created `test_editor_visual_theme.gd` to verify the loading and application of visual themes in the editor, including semantic overrides and default values.
- Introduced `test_phase19_ground_finish_chooser.gd` to test the ground finish chooser's functionality, including layout responsiveness, selection behavior, and interaction with the stage.
- Added new scripts for ground finish preview and chooser UI components to enhance the editor's visual representation of ground finishes.

docs/architecture/tech_debt_and_optimizations.md

@@ -88,6 +88,9 @@ This document tracks known technical debt, optimization opportunities, and minor
 | 76  | **Camera-aware Sky redraws vector motifs while framing changes** — the former static Sky drew motifs only when the preset or viewport changed. | Low | Planned | The Phase 19 Sky addition keeps one screen-space `StageSkyView`, redraws only when a bound camera's effective framing changes, and caches reusable cloud/moon curve samples where practical. Measure sustained pan/zoom cost in a rendered Stage before adding a raster or shader path. The fixed reference frame and bounded response can saturate at distant camera positions; that is an accepted composition trade-off, not scene state to persist. See `docs/specs/phase_19_scenery_backgrounds_surface_finishes.md#phase-19-addition-camera-aware-sky-details`. (2026-10-21) |
 | 77  | **Starter surfaces guarantee a finite pan envelope, not arbitrary camera framing** — the two bundled sets use a fixed authored width to keep their scene data simple. | Low | Implemented; visual review pending | The authored envelope is a 1,280-logical-pixel viewport at zoom 0.5, ±1,000 world units of travel, and 100 units of margin per side. User review prompted an opaque Town Grass Background ground and separate scale-1 tile rows. Twenty-five 192-unit tiles cover the 4,760-unit minimum; Asphalt has 27 tiles (5,184 units) so the road extends one tile beyond the sidewalk at both ends. Navigation merges contiguous tile tops and routes the 32-unit curb step at the exposed ends without merging Ground objects or colliders. The focused suite passes 515 assertions, including the curb step and PLAY landing. The camera remains unrestricted, so wider viewports, farther pans, and zoomed-out shots can reveal finite ends. Rendered seam review remains pending. See docs/specs/phase_19_starter_scene_composition.md. (2026-10-21)
 | 78  | **Plain Background adds a second backdrop kind while Sky remains a separate renderer** — live Stage, starter previews, and chooser cards must agree on kind and remembered color. | Medium | Spec prepared; implementation pending | Phase 19 composes one shared `StageBackgroundView` from the existing Sky view and an opaque fill. Scene v1.7 stores active kind, last Sky ID, and confirmed plain color; all older scenes migrate as Sky. `SandboxStage` owns the transient custom-picker draft, which must never enter Save or autosave. The existing chooser's four-Sky layout and 42 px compact swatches need targeted extension, and grid/gizmo contrast needs theme-backed treatment for light and dark fills. Rendered pan/zoom/resize, legacy migration, and every draft-cancel exit remain verification gates. See `docs/specs/phase_19_plain_background.md`. (2026-10-22) |
+| 79  | **Editor chrome has two existing token sources and scene-level literals** — PropTheme owns current Prop UI values while Stickman scenes hardcode bars, labels, and borders. | Medium | Spec prepared; implementation pending | Add one validated `EditorVisualTheme` source for shared semantic chrome and editor-local `Theme` instances. Retain PropTheme for prop material/primitive/canvas values and keep Stickman canvas drawing tokens in a separate namespace. Migrate legacy Prop `ui` accessors deliberately so a chrome role has one final authority; use SandboxTheme values as a visual reference without a runtime dependency or Stage inspector component reuse. See `docs/specs/editor_visual_harmonization.md`. (2026-10-23) |
+| 80  | **Stickman panel nodes currently own both document shapes and local view state** — rebuilding a panel for a focused layout would reset selection, zoom, and pan and risk save/preview drift. | Medium | Spec prepared; implementation pending | Move the same ten BodyPartPanel instances between Overview and Focus hosts, retain one permanent WholeStickmanPreview sibling, and defer switching while a drag or popup is active. The controller owns session-only view choice and active part; manually chosen views survive resize, and narrow Overview remains scrollable. A future document-model extraction is warranted only if new editor features make live-node ownership limiting. See `docs/specs/editor_visual_harmonization.md`. (2026-10-23) |
+| 81  | **Stickman authored transforms lack a complete dirty-state boundary** — preview translation emits `part_moved`, while rotation and scale currently have no commit signal; Save/Load/Clear do not track unsaved work. | Medium | Spec prepared; implementation pending | Add a controller-observable transform commit path for position, rotation, and scale, plus `_dirty`/`_current_path` and Save/Discard Changes/Cancel transactions for replacement and close. Keep Overview/Focus, guide, grid, selection, and zoom/pan as session UI state that never marks dirty. Preserve the `.stk` format. See `docs/specs/editor_visual_harmonization.md`. (2026-10-23) |
 
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