[euforic]

Summary

• replace the archived MarkdownUI dependency with MarkdownView 3.0
• keep Streamdown responsible for streaming parsing, stable block reuse, code and table rendering, controls, and safe-link interception
• disable the optional LaTeX dependency trait and remove obsolete MarkdownUI theme caching
• preserve reduced-motion and bounded code-rendering behavior

Validation

• swift test — 102 tests passed
• git diff --check
• resolved dependency graph contains MarkdownView and no SwiftMath

Impact

Consumers retain the existing Streamdown API while Markdown blocks use the maintained MarkdownView renderer.

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