M3: stroke on type, Stroke panel units, mixed values and Control bar (M3.40, M3.41)

[bflatastic]

Part of M3 (Paint & appearance). The Stroke panel now edits the stroke of type characters, and it follows the stroke units, shows mixed values blank and reaches the Control bar.

• M3.40: stroke on type.
  • Model: CharStyle gains stroke_cap, stroke_join, stroke_miter_limit (default 10) and stroke_dash, defaulted and only written when set. One CharStyle::appearance() builds the characters' fill and stroke, keeping the overprint flags and the stroke options.
  • stroke.set: with type selected and no item, it sets weight, cap, join, miter limit and dashes on every run; an explicit item edits an object stroke. Unknown cap or join names are now rejected.
  • Typing: text.setRangeStyle {strokeOptions} styles a range of characters, and the Stroke panel uses it while the Type tool edits text.
  • Output: character strokes and object strokes on type go through the shared stroke code on the canvas, in PDF and in SVG, so dashes, joins, profiles, opacity, blend and brushes all apply.
    • Object fills and strokes sit under or over the characters by their place relative to the Characters row (M3: group, layer and type appearance with Contents and Characters rows (M3.68) #26).
    • SVG writes and reads back the character stroke options.
  • Other features: Create Outlines, the Eyedropper and graphic styles keep the options.
  • Behaviour change: character strokes now default to a miter join like object strokes, instead of always drawing round joins.
• M3.41: Stroke panel usability.
  • Units: weight and dash fields follow Units ▸ Stroke in the Stroke panel, the Control bar and the Properties panel.
  • Mixed selections: values the selection doesn't share show blank (DocState::stroke_mixed, cached per revision).
  • Align: Inside/Outside are disabled for open paths and type.
  • Control bar: a weight spinner with presets from 0.25 to 100 pt and a profile dropdown. Its Stroke link opens the Stroke panel as an anchored popover, as does the Properties panel's "…" button.
  • Groups: stroke.set on a group skips images and symbol instances.
  • Inspect: document.inspect reports strokeOptions (cap, join, miter limit, align, dash, offset, alignment, arrowheads, profile), including for groups and layers that carry their own stroke.

docs/mcp.md has a "Strokes on type" section.

Known limits:

• With type selected, the arrowhead and profile controls stay enabled but have no effect.
• Mixed values aren't computed for a typed range.

Checks

Rebased onto 09778f2 (#27). cargo xtask ci passes all 7 steps on this branch: 1,550 tests, 0 failed.

• New tests:
  • engine;
  • render (round joins without spikes, dashes, opacity);
  • SVG (an object-stroke dash) and PDF;
  • a UI typing-range test;
  • a native round-trip and loading an older file;
  • the panel checks: a 1 pt stroke shown in mm, disabled buttons, a blank mixed weight, inspect fields, presets 0.25 and 100, and skipping images and symbols in groups.
• Checked in the running app: a dashed type stroke, the blank mixed weight, the Control bar and the anchored popover.

🤖 Generated with Claude Code