Add LaTeX math support to MarkdownText with Unicode rendering and pre…

[samrudha01codespace]

This pull request significantly enhances the MarkdownText composable in MarkdownText.kt by adding support for rendering LaTeX-style mathematical expressions within Markdown, converting them to Unicode symbols for display. It also introduces new helper functions, UI improvements, and preview examples.

LaTeX/Math Support and Processing:

• Added a convertLatexToUnicode helper function that maps common LaTeX commands (Greek letters, math operators, superscripts, subscripts, fractions) to their Unicode equivalents, enabling basic math rendering without a LaTeX engine.
• Updated MarkdownText to process and replace inline ($...) and block ($...$`) LaTeX expressions in the input text, displaying them as Unicode math symbols.
• Introduced a MathExpression composable for rendering block and inline math in a styled manner, including background and font adjustments.

UI and Theming Improvements:

• Improved code block and link styling in Markdown using RichTextStyle and TextLinkStyles, and updated color and typography handling for better readability and theme integration.
• Replaced references to customColors with theme-aware color selection and added underline styling to links. (Fc29d3b2L

[samrudha01codespace]

Markdown Enhancement

Add Lightweight LaTeX Math Rendering Support to MarkdownText

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Overview

This pull request enhances the MarkdownText composable by introducing lightweight LaTeX-style mathematical rendering without requiring a full LaTeX engine.

The implementation focuses on practical, commonly used mathematical expressions while keeping the solution Compose-native and efficient.

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What’s Included

1. LaTeX / Math Support

• Support for inline math expressions using $...$.

• Support for block math expressions.

• New convertLatexToUnicode() helper function that maps common LaTeX commands to Unicode equivalents, including:

  • Greek letters
  • Superscripts and subscripts
  • Basic mathematical operators
  • Fractions

This enables basic math rendering directly inside Markdown without external rendering engines.

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2. New Composable

• Introduced MathExpression composable for rendering inline and block math.

• Styled rendering with:

  • Background adjustments
  • Typography tuning
  • Improved readability

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3. UI & Theming Improvements

• Improved code block styling using RichTextStyle.
• Enhanced link styling with underline support.
• Replaced custom color references with theme-aware color handling.
• Refined typography for better consistency and readability.

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Why This Change

• Enables mathematical content inside Markdown.
• Avoids dependency on heavy LaTeX engines.
• Improves support for technical documentation and educational content.
• Maintains lightweight and extensible architecture.

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Scope

The implementation focuses on commonly used mathematical constructs and is designed for future extensibility.

No breaking changes introduced.