Part of #394: Preferences for snapping, handles, rubber bands, pattern tiles, tints and type

Fourteen more Preferences options that were stored but read by nothing now
act, for the mouse and for agents (prefs.set, then pointer_gesture,
press_key or the commands):

- Selection & Anchor Display: Snap to Point and its distance (with Smart
  Guides off, View > Snap to Point lands a dragged selection's grabbed
  point, drawn points and reference points on anchors and ruler guides);
  Move Locked and Hidden Artwork with Artboard (artboard.move, the Artboard
  tool and Rearrange; off, hidden art now stays too); Enable Rubber Band for
  the Pen and Curvature tools; Handles (solid, hollow, large);
  Show handles when multiple anchors are selected (canvas and Direct
  Selection's handle picking); Hide Corner Widget for angles greater than.
- General: Transform Pattern Tiles is the default of a new `patterns`
  param on object.transform/move/rotate/scale/reflect/shear/transformEach
  (journalled when the art uses a pattern), and the transform dialogs get a
  Transform Patterns checkbox; Select Same Tint % (off, Select > Same
  Fill/Stroke Color takes every tint of a global or spot swatch).
- Type: new type.step {attribute, by} steps size, leading, tracking, kerning
  and baseline shift by the Size/Leading, Tracking and Baseline Shift
  increments; Increase/Decrease Font Size (Cmd+Shift+. and Cmd+Shift+,);
  the Type tool's Alt+arrows (kerning at a caret or tracking, leading,
  Shift for baseline shift, Cmd/Ctrl for five steps). Enable Missing Glyph
  Protection keeps characters a new font lacks in the font that had them
  (text.setStyle, text.setRangeStyle). Fill New Type Objects With
  Placeholder Text: type the Type tools place starts with placeholder text,
  selected (text.create / text.createInPath take `placeholder`).

Units > General, Stroke and Type were already the single source of truth
(units.rs). Auto Size New Area Type, Show Font Names in English and
Highlight Alternate Glyphs need subsystems the app doesn't have yet and
stay open with the rest of #394.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/doc/src/node.rs

@@ -252,6 +252,9 @@ pub struct Scaling {
     pub keep_type_strokes: bool,
     /// Live corner radii keep their size.
     pub keep_corners: bool,
+    /// Pattern fills and strokes move with the art (Transform Patterns; General › Transform
+    /// Pattern Tiles is its default): their tiles transform too, instead of staying put.
+    pub patterns: bool,
 }
 
 impl Scaling {
@@ -526,6 +529,12 @@ impl Node {
             _ => None,
         }
     }
+    /// Does this object or layer move with its artboard? Locked and hidden ones only with
+    /// `locked_and_hidden` (Selection & Anchor Display › Move Locked and Hidden Artwork with
+    /// Artboard).
+    pub fn rides_with_artboard(&self, locked_and_hidden: bool) -> bool {
+        locked_and_hidden || (!self.locked && self.visible)
+    }
     pub fn is_layer(&self) -> bool {
         matches!(self.kind, NodeKind::Layer { .. })
     }
@@ -721,6 +730,9 @@ impl Node {
             }
         }
         self.appearance.transform_gradients(a);
+        if sc.patterns {
+            crate::pattern::transform_pattern_paints(self, a);
+        }
         match &mut self.kind {
             NodeKind::Path { path, live, .. } => {
                 path.transform(a);
@@ -1318,7 +1330,7 @@ mod tests {
         }
     }
 
-    const KEEP_CORNERS: Scaling = Scaling { strokes: false, effects: None, keep_type_strokes: false, keep_corners: true };
+    const KEEP_CORNERS: Scaling = Scaling { strokes: false, effects: None, keep_type_strokes: false, keep_corners: true, patterns: false };
 
     #[test]
     fn uneven_scales_keep_live_corners_circular() {