Agent chat: the minimap's hover card is glass, not a solid card

Merged
TE
15d ago
+41-2

Leo, 2026-10-21: hovering a mark in the transcript's minimap shows a SOLID card (title, bookmark, three-line preview).

Change

  • .acpmux-minimap__card (threadMinimap.css) used to fill with --acpmux-minimap-card, which is opaque. It is now glass, like the chat's other hover cards (the link preview card and the tooltips): background: var(--tooltip-tint, …) over backdrop-filter: var(--surface-blur).
  • It keeps its hairline rim and the raised elevation, --elevation-2 (subtle-elevation.test.ts).
  • Reduce Transparency makes the tint the solid popup surface and turns the blur off through the shared tokens (pages/shared/desktop.css).
  • No accent color, no orange.
  • The minimap itself is off by default after #23735. This PR changes the card for the full and compact arms that dogfood keeps.

Testing

  • Command: bun test test/thread-minimap-card-glass.test.ts.
    • Red on 19e562874fd (test only): "the minimap card is the tooltip glass" fails.
    • Green at the head, together with test/subtle-elevation.test.ts: 38 pass.
  • bun run check passes at the head (oxfmt, oxlint, type check, check-layers). prepush-gate is clean.

Observed / Not run

  • Observed: the tests and checks above, run on huge-blue.
  • Not run: a gallery capture. The gallery advisory run on this PR renders agent-pane.thread-minimap with the hover card under each arm.

Changelog

  • Changed: the thread minimap's hover card is frosted glass instead of a solid card.

Webview only; no native UI change.

Agent session: cosmic-gray

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Summary by cubic

Changes the thread minimap's hover card from a solid opaque fill to the same frosted-glass treatment as the chat's other hover cards (link preview, tooltips): the tooltip tint over the shared blur. It keeps its hairline rim and raised elevation; Reduce Transparency swaps the glass for the solid popup surface through the shared tokens. The minimap remains off by default, so this affects only the full and compact arms. Adds a test asserting the card uses the tooltip glass and draws no accent.