Type Object Selection by Path Only: every baseline, Type tool and Eyedropper (review of #475)

- Type is picked on the baseline of any of its lines (point type and area
  type, besides area type's frame), as in Illustrator, not only the first
  one: the layout's baselines are cached with its bounds
  (`TextObject::cached_baselines`, from `TextLayout::baselines`), with the
  first one across the bounds as the fallback. Vertical type's runs down
  each column's centre line.
- Type in perspective is picked where it is drawn (through its projection).
- The bounds rule type out before its path is built, so hovering stays
  free of allocations away from type.
- The Type tools still edit type clicked among its characters (they made
  new type there with the preference on), and the Eyedropper still samples
  it there, as it does inside fills with Object Selection by Path Only.
- Tests for all of it; docs/mcp.md and ROADMAP say so.

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

crates/tools/src/text.rs

@@ -230,7 +230,7 @@ impl TypeTool {
 
     /// Path under `p` for the Area Type / Type on a Path tools.
     fn path_at(cx: &ToolContext, p: Point, closed: bool) -> Option<NodeId> {
-        let h = hit_test(cx.doc, p, vectorcraft_doc::hit::HitOptions { tol: cx.tol(4.0), outline: true, path_only: false, type_path_only: false })?;
+        let h = hit_test(cx.doc, p, vectorcraft_doc::hit::HitOptions { tol: cx.tol(4.0), outline: true, ..Default::default() })?;
         match &cx.doc.node(h.leaf)?.kind {
             NodeKind::Path { path, .. } if !closed || path.is_closed() => Some(h.leaf),
             _ => None,
@@ -238,9 +238,10 @@ impl TypeTool {
     }
 
     /// Start editing the type under `p` with the caret there → the actions (ending the previous
-    /// edit, selecting the type); None when no type is under `p`.
+    /// edit, selecting the type); None when no type is under `p`. A click among the characters
+    /// edits them, whatever Type Object Selection by Path Only says.
     fn edit_at(&mut self, cx: &ToolContext, p: Point) -> Option<Vec<Action>> {
-        let h = hit_test(cx.doc, p, cx.hit_options())?;
+        let h = hit_test(cx.doc, p, vectorcraft_doc::hit::HitOptions { type_path_only: false, ..cx.hit_options() })?;
         let Some(NodeKind::Text(t)) = cx.doc.node(h.leaf).map(|n| &n.kind) else { return None };
         let lay = self.layout(t);
         let byte = vectorcraft_text::hit_byte(&lay, t.xf.inverse() * p);

crates/tools/src/xform/eyedropper.rs

@@ -70,7 +70,9 @@ impl Tool for EyedropperTool {
         if ev.kind != PointerKind::Down {
             return vec![];
         }
-        let opts = vectorcraft_doc::hit::HitOptions { path_only: false, ..cx.hit_options() };
+        // A click inside a fill or among characters samples it too, whatever Object and Type
+        // Object Selection by Path Only say.
+        let opts = vectorcraft_doc::hit::HitOptions { path_only: false, type_path_only: false, ..cx.hit_options() };
         let Some(h) = hit_test(cx.doc, ev.pos, opts) else { return vec![] };
         let src = paint_owner(cx.doc, h.leaf);
         let Some(n) = cx.doc.node(src) else { return vec![] };