fix(editor): let live preview resolve link targets through the host app

[jian45154]

Fixes #559

What

Local attachment links (FILE://) lost their <a href> rendering in live preview after the Milkdown → CodeMirror migration: buildDecorations in preview.ts hardcoded resolveSafeLinkTarget, so only http/https/mailto/tel and scheme-less targets could render as anchors, with no way for the host app to allow its local-attachment scheme.

• Add an optional resolveLinkTarget hook to LivePreviewConfig (mirrors linksPlugin.resolveTarget and imagePreviewPlugin.resolveSource, including the try/catch + trim semantics of resolvedLinkSource). Default behavior is unchanged when the hook is not provided.
• Pass the existing app resolver from CodeMirrorPaperSurface so imported attachments render as anchors again.
• Align the clears finalized image source editing app test with the current CodeMirror widget UX (preview stays visible, inline source row opens); its old expectations described removed Milkdown behavior and always failed.
• Test-infra: raise asyncUtilTimeout to 5s and testTimeout to 15s in @markra/app — on slower machines the 1s/5s defaults produced rotating timeout flakes across the suite. Feel free to drop this commit if you prefer.

Why it went unnoticed

ci.yml only triggers on main, so pushes to v2 never ran the frontend suite. Two App.test.tsx tests covering this behavior fail deterministically on v2:

• imports local attachments into an unsaved document when external files are not copied
• clears finalized image source editing when document search opens

(The pre-existing typecheck:test failure in packages/editor/src/codemirror/ai-preview.test.ts on v2 is unrelated and left untouched.)

Verification

• @markra/editor tests: 245 passed (adds 2 focused tests for the new hook: resolver-allowed target renders an anchor, resolver-rejected target renders a plain span).
• @markra/app tests: 1357 passed, including the two previously failing tests.
• pnpm build passes.

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated (UTC)
markra-web	Ready	Preview, Comment	Jul 22, 2026 11:18am

[murongg]

Thanks for the fix — local attachment links now render correctly in the regular live preview. There is one remaining rendering path that needs the same resolver before this is complete.

Visual table cells use the separate renderInlineMarkdown path. That renderer still hardcodes resolveSafeLinkTarget, while renderVisualTableCell only forwards the image resolver. As a result, the same link still loses its anchor semantics inside a visual table:

| Attachment |
| --- |
| [Reference.pdf](FILE:///mock-files/Reference.pdf) |

I reproduced this with a focused table test using tablePreviewPlugin({ links: { resolveTarget } }): expected A, received SPAN.

Please pass the link resolver through InlineMarkdownRenderOptions and the table rendering path, including the current editor state/view context, and add a regression test for a custom-resolved link inside a visual table cell.

Non-blocking: the global asyncUtilTimeout / testTimeout increase is unrelated to the link fix and would be easier to evaluate as a separate PR (or can be dropped here).