Implement Phase 6 features for Stickman Editor

- Updated BUGS.md with new issues related to selection bounding box, touchpad panning speed, and zooming behavior.
- Enhanced PROJECT.md with detailed specifications for touchpad controls, recent colors in the color picker, and a status bar for project information.
- Modified project.godot to update compatibility version to 4.7.
- Added a status bar in stickman_editor.tscn to display cursor coordinates and snap status.
- Updated body_part_panel.gd to handle recent colors and cursor detection over drawing areas.
- Enhanced stickman_editor.gd to manage cursor coordinates display and recent colors tracking.
- Improved whole_stickman_preview.gd to render selection gizmos on top of other parts.
- Created master_rig.tscn for the stickman rig structure with bones and IK targets.
- Developed master_rig_builder.gd to automate the rig building process with remote transforms and IK modifications.

AGENTS.md

@@ -22,6 +22,21 @@ assembled in a "Whole Stickman" preview that supports translation, rotation, and
   Writes `FILE_VERSION "1.2"`; auto-migrates `"1.0"`/`"1.1"` files on load. Coordinates cross-panel
   selection so only one shape is selected at a time (`shape_selected` → deselect others).
   Collects per-part `{shapes[], position, rotation, scale}` for save/load.
+  - **Phase 6 recent colors:** stores `_recent_colors: Array[String]` (max 8,
+    most-recent-first), loads from `settings.json` (`recent_colors` key) in
+    `_load_settings()`, saves on each color selection via `_save_settings()`, and
+    broadcasts to all 10 panels via `_broadcast_recent_colors()`.
+  - `_on_color_selected(color, part_name)`: deduplicates, inserts the hex string at the
+    front, trims to 8 entries, saves settings, then broadcasts to all panels.
+  - `_broadcast_recent_colors()`: pushes `_recent_colors` to every panel via
+    `BodyPartPanel.set_recent_colors(_recent_colors)`.
+  - **Phase 6 status bar (cursor coords):** `_process()` polls
+    `get_global_mouse_position()` each frame, checks each panel via
+    `is_cursor_over_drawing(global_pos)` and the preview via
+    `is_cursor_over_preview(global_pos)`, converts to world space via
+    `global_to_world(global_pos)`, and writes `"X: ###  Y: ###"` to `_status_cursor_coords`.
+  - **Phase 6 snap status:** `_status_snap_status` displays `"SNAP: ON"` / `"SNAP: OFF"`,
+    set in `_ready()` and re-synced when snap is toggled (`_on_edit_menu_id_pressed`).
 - `scripts/body_part_panel.gd` — `class_name BodyPartPanel`, `extends PanelContainer`.
   Reusable per-part editor. Public API:
   - `set_shape_data(data: Variant)` — import shape data (Array or single Dictionary; used on Load/Clear)
@@ -31,6 +46,10 @@ assembled in a "Whole Stickman" preview that supports translation, rotation, and
   - `deselect()` — clear selection and cancel any in-progress vertex drag
   - `signal shape_changed(shapes: Array)` — emitted when any shape is created, modified, deleted, or reordered
   - `signal shape_selected()` — emitted on left-click; the editor deselects all other panels
+  - `signal color_selected(color: Color)` — emitted when the color is confirmed (OK button)
+  - `set_recent_colors(colors_hex: Array)` — clears existing ColorPicker presets and populates with the given hex colors
+  - `is_cursor_over_drawing(global_pos: Vector2) -> bool` — true if `global_pos` is over the drawing surface
+  - `global_to_world(global_pos: Vector2) -> Vector2` — maps a global position to drawing ("world") space
   - **Phase 2 vertex editing:** left-click on a shape selects it; drag a vertex handle to
     reshape in real time; with a shape selected, right-click near an outline edge offers
     "Create Point" (inserts a vertex flagged `1` at the edge midpoint). Original vertices
@@ -41,27 +60,23 @@ assembled in a "Whole Stickman" preview that supports translation, rotation, and
     is active for vertex editing.
   - **Per-panel zoom:** mouse wheel multiplies `_zoom` by 1.10, clamped to `[0.3, 3.0]`;
     drawing and input hit-testing both run in world space via `draw_set_transform`.
-  - **Drawing approach:** closedness is read from the `closed` flag (Phase 2), not
-    `shape_type`. Closed shapes are filled via `draw_colored_polygon(pts, color)` before a
-    2 px outline is drawn with `_draw_polyline(..., closed=true)`. Open shapes render
-    outline-only (`closed=false`). Shapes draw in array order (z-order).
-- `scripts/whole_stickman_preview.gd` — `class_name WholeStickmanPreview`,
-  `extends PanelContainer`. Assembles all parts and handles drag-to-reposition, rotation, scale.
-  - `set_body_parts(parts_data)`, `set_all_part_positions(pos)`, `get_part_position(name)`
-  - `get_part_rotation(name) -> float`, `set_part_rotation(name, degrees)`
-  - `get_part_scale(name) -> Vector2`, `set_part_scale(name, scale)`
-  - `_selected_part` (String) — part with white bounding box selected
-  - `_interaction` (enum: NONE, TRANSLATE, ROTATE, SCALE) — current gizmo interaction
-  - Rotation gizmo: filled circle centered below bounding box; Ctrl = 15° snap
-  - Scale gizmo: crosses at 4 corners; Ctrl = aspect ratio lock
-  - `signal part_moved(part_name, new_position)`
-  - Per-panel zoom via mouse wheel (×1.10, clamped to `[0.3, 3.0]`); drag hit-tests and
-    rendering run in world space.
+  - **Phase 6 touchpad:** `_gui_input` handles `InputEventMagnifyGesture` (pinch zoom)
+    and `InputEventPanGesture` (2-finger drag panning), both checked before
+    `InputEventMouseButton`. Pan gesture delta is multiplied by 3.0 for speed
+    parity with mouse panning.
+  - **Phase 6 cursor-centered zoom:** both mouse wheel and pinch zoom adjust
+    `_pan_offset` so the world point under the cursor stays fixed during zoom.
+  - **Selection gizmos always on top:** bounding box, rotation circle, and scale
+    crosses for the selected part are drawn in a second pass after all parts,
+    via `_selected_gizmo_bounds`, so they always render in front.
 - Scenes:
   - `scenes/stickman_editor.tscn` — main editor layout; unique-name nodes (`%Prefix`) used
     for typed `@onready` access: `%MenuBar`, `%StickmanNameEdit`, `%LeftColumn`,
     `%CenterColumn`, `%WholeStickmanPreview`, `%SaveDialog`, `%LoadDialog`,
-    `%ClearConfirmDialog`, `%ErrorDialog`.
+    `%ClearConfirmDialog`, `%ErrorDialog`, `%StatusBar`, `%CursorCoords`, `%SnapStatus`.
+    - **Phase 6 status bar:** `StatusBar` is an `HBoxContainer` bottom-anchored at 28 px
+      height containing `CursorCoords` (left) and `SnapStatus` (right); `MainLayout`
+      `offset_bottom` is `-28.0` to leave room for it.
   - `scenes/body_part_panel.tscn` — instantiated 10× at runtime (5 per column). Each panel
     sets `size_flags_vertical = SIZE_EXPAND_FILL` so the panels expand to fill the column
     height in their parent VBoxContainer.
@@ -83,6 +98,13 @@ assembled in a "Whole Stickman" preview that supports translation, rotation, and
 - The JSON `.stk` format is defined in `README.md` (versioned `"1.2"`, extensible;
   `"1.0"`/`"1.1"` files auto-migrate on load).
 
+### settings.json (Phase 6)
+- Persisted editor preferences written to `settings.json` via `_save_settings()` and
+  loaded in `_load_settings()`.
+- Keys: `version`, `grid_size`, `snap_to_grid`, `recent_colors`.
+- `recent_colors: Array[String]` — the last up-to-8 selected hex colors, most-recent-first.
+  Populated on load and flushed on every color selection.
+
 ### Legacy scene (do not delete)
 - `stick.tscn` — the original rigged/animated figure using `Skeleton2D` + IK targets +
   `RemoteTransform2D` + `Line2D` limbs, plus an embedded `@tool` script drawing the head