chore(deps): update dependency streamdown to v1.6.9

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
streamdown (source)	1.4.0 -> 1.6.9

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Release Notes

vercel/streamdown (streamdown)

v1.6.9

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Patch Changes

• 57dec2a: Restores pan-zoom component to normal size when mermaid component is maximized
• a954419: Bump rehype-harden
• 99797c2: chore: move unified from devDependencies to dependencies

v1.6.8

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Patch Changes

• 6fc3fa0: fix excessive spacing above tables
• b2e832f: fix: validate languages in code blocks

v1.6.7

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Patch Changes

• cfc8c37: Fix p tags inside list items

• e4e5bb5: Fix unit tests

• 00ca9a9: Add PanZoom controls configurability for Mermaid diagrams.

  • Support controls.mermaid.panZoom (boolean) to toggle zoom controls globally
  • Support mermaid.config.panZoom (boolean or { showControls?: boolean }) per-instance
  • Keep defaults enabled; false explicitly hides the zoom controls

  This is a non-breaking enhancement that aligns with existing control predicates.

• a489949: fix: add missing tooltip support to action buttons

v1.6.6

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Patch Changes

• 74cac00: Fix code block data attributes

v1.6.5

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Patch Changes

• 1e547d4: Fix code blocks in dark mode

v1.6.4

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Patch Changes

• dbd198f: Restore original lucide imports

v1.6.3

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Patch Changes

• 49b6692: build for browser only (fixes ts-router)

v1.6.2

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Patch Changes

• 476167e: Conditional KaTeX CSS loading based on content detection
• 476167e: Bundle optimization through lazy loading and code splitting

v1.6.1

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Patch Changes

• bdca13b: Fix markdown parsing bug

v1.6.0

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Minor Changes

• 6f19ee0: Remove dependency on react-markdown
• 52db013: Implement Static mode

Patch Changes

• 4e12df6: Performance optimizations
• 606209d: Rebuild syntax highlighting
• 093cd5c: Remove urlTransform and defaultUrlTransform
• 28ab339: Fix incomplete link termination in code blocks
• b55cbdc: Fix security issues, improve performance
• 872da1a: Allow for custom error components for Mermaid diagrams
• 090c82e: Fix list CSS
• 22cbaeb: Added the ability to export mermaid diagrams to svg and png alongside mmd
• 936af5b: Add PanZoom component and tests for zoom and pan functionality

v1.5.1

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Patch Changes

• 40fe4c6: Fix documents and some test cases for CJK Friendly Emphasis
• 19da935: fix pnpm version mismatch

v1.5.0

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Minor Changes

• 5c4ad8b: Add fullscreen view button for Mermaid diagrams
• 2ebd886: Fix performance issues with large code streaming blocks

Patch Changes

• f7568e5: Export parseIncompleteMarkdown function to public API
• 5363a51: Stabilize Streamdown contexts
• f941fd6: Improved CJK support with remark-cjk-friendly and remark-cjk-friendly-gfm-strikethrough
• f4c9c1e: Add block-level customization hooks
• 171a824: fix base64 images
• e17bf80: fix: add overflow-hidden to TableDownloadDropdown
• ed0154a: Add TSV copy support to tables
• 75e9d40: Add documentation
• 75e9d40: Fix linting and formatting issues
• 7041497: Fix in-word asterisks
• fbdec4d: fix: add border-border to code block
• 75e9d40: Document styling
• 8a3fc5a: Dynamically load katex.min.css only when rehypeKatex is included in the rehypePlugins

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