fix(editor): stabilize quote and callout list editing

[murongg]

Summary

• Align ordinary blockquote Enter behavior with callouts: non-empty lines continue inside the quote, while blank quote lines exit.
• Stabilize list editing in blockquotes and callouts, including Enter, Tab, Shift+Tab, empty list deletion, and sibling indentation preservation.
• Finalize live markdown and continue the Enter action in the same keystroke for quote/callout content.

Why

• Follow-up feedback on [Bug]: GitHub 风格警告框的bug #224 reported ordinary blockquote list regressions and callout/quote Enter/list indentation behavior that differed from Typora-style expectations.

Validation

• pnpm --filter @markra/app exec vitest run src/components/MarkdownPaper.test.tsx passed (344 tests)
• pnpm --filter @markra/app exec vitest run src/components/MarkdownPaper.test.tsx -t "quote formatting|quote list|callout body|callout list|callouts on Enter|callout.*Enter|live markdown inside|typed quote content|typed callout content|Shift\\+Tab|Tab like ordinary|list continuation|without reducing|nests only the current" passed (59 tests)
• pnpm --filter @markra/editor test passed (3 tests)
• pnpm -r --if-present test passed
• pnpm -r --if-present build passed
• git diff --check HEAD passed

Risk

• The changed surface is editor keyboard handling inside lists, blockquotes, and callouts; the main residual risk is platform-specific desktop key/caret behavior not captured by jsdom.

Related Issues

• Refs [Bug]: GitHub 风格警告框的bug #224

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Project	Deployment	Actions	Updated (UTC)
markra-web	Ready	Preview, Comment	Jun 12, 2026 2:31am