feat: add wikilink hover cards

[ocavue]

Hovering a rendered wiki link opens a passive hover card after a 300ms dwell: core gains a transaction-aware defineWikilinkHoverHandler, and @meowdown/react gains WikilinkHoverCard, built on Base UI's PreviewCard, whose render prop returns the card body from the hovered hit (or null for no card). An open card follows the pointer across links without a new dwell, sliding to the new anchor, and MarkdownView gets an interactive prop for inert local previews. Redoes #288 with a smaller API surface, and fixes adjacent wide-alias wikilink labels resolving clicks to their neighbor.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
meowdown	Ready	Preview	Jul 12, 2026 10:02am

[pkg-pr-new]

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npm i https://pkg.pr.new/prosekit/meowdown/@meowdown/core@291

npm i https://pkg.pr.new/prosekit/meowdown/@meowdown/react@291

commit: cebe554

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	93.95%	3624 / 3857
🔵	Statements	91.62%	4037 / 4406
🔵	Functions	91.84%	878 / 956
🔵	Branches	85.8%	2472 / 2881

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
packages/core/src/index.ts	0%	0%	0%	0%
packages/core/src/extensions/link-hover.ts	100%	100%	100%	100%
packages/core/src/extensions/mark-click.ts	91.66%	87.5%	100%	100%	35
packages/core/src/extensions/mark-hover.ts	88.37%	87.09%	100%	94.44%	54, 61, 70, 98-99
packages/core/src/extensions/wikilink-click.ts	85.71%	75%	83.33%	91.66%	39, 56
packages/core/src/extensions/wikilink-hover.ts	100%	100%	100%	100%
packages/react/src/index.ts	0%	0%	0%	0%
packages/react/src/components/markdown-view.tsx	93.75%	82.14%	92.85%	98.59%	133, 137, 187, 222, 224, 280, 293, 383, 393, 440
packages/react/src/components/wikilink-hover-card.module.css	0%	0%	0%	0%
packages/react/src/components/wikilink-hover-card.module.d.css.ts	0%	0%	0%	0%
packages/react/src/components/wikilink-hover-card.tsx	94.73%	85.71%	91.66%	96.77%	76
packages/vitest/src/setup-console.ts	0%	100%	0%	0%	3-10

Generated in workflow #1185 for commit cebe554 by the Vitest Coverage Report Action