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pansy/web
steveandClaude Opus 4.8 bfc5d9a871
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Make the canvas keyboard-reachable + trap focus in dialogs (#84)
The arrow-key nudge handler existed but only ever acted on a POINTER
selection, and nothing could select without a mouse — so the feature was
unusable by exactly the keyboard users it's for. This is the scoped first
slice: give the canvas a keyboard path in, and fix the Modal focus trap that
every destructive confirmation goes through.

Canvas:
- The <svg> gets role="application" + an aria-label describing the controls,
  and a <title> naming the garden — a screen reader now announces an
  interactive canvas rather than an empty graphic.
- Each object <g> is a focusable role="button" with an aria-label (name +
  kind) and aria-pressed reflecting selection. Enter/Space selects it — the
  step that was missing — which makes the existing arrow-key nudge reachable.
- A :focus-visible CSS rule draws a dashed accent ring on keyboard focus (and
  NOT on a mouse click, which is the point of :focus-visible). CSS rather than
  React state because onFocus on an SVG <g> is unreliable, and a CSS rule
  cleanly overrides the shape's inline stroke.

Modal (blast radius: DeleteGarden/ClearBed/DeletePlant/DeleteSeedLot/Share):
- Tab is trapped inside the dialog and wraps at the ends, instead of walking
  out into the page behind the backdrop.
- On close, focus returns to the element that opened the dialog rather than
  landing on <body>.

Verified live against the built binary with real keyboard input: Tab focuses
an object (SVG <g tabindex> genuinely takes focus), Enter flips aria-pressed
false→true, the focus-visible dash renders (computed stroke-dasharray "5px,
4px"), the dialog traps focus through 5 Tabs, and Escape closes it and
restores focus to the opener.

Follow-ups noted, not done here: object dimensions in the aria-label (needs the
garden's unit context this component doesn't hold), roving-tabindex between
plops inside a focused bed, and the EditorRail tablist semantics.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01H3zbym8Doka2d7D48maSgZ
2026-07-21 23:20:47 -04:00
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