Ad Hoc: Fix Markdown Link Rendering in Copilot Streaming Messages (Issue #40)

• Ad Hoc: Fix Markdown Link Rendering in Copilot Streaming Messages (Issue #40)
  • Identified root cause: Copilot streaming chunks with markdown links were sent as plain text instead of formatted HTML
  • Added hasMarkdownLinks() helper function to detect markdown links in text chunks using regex pattern
  • Modified Copilot streaming callback to route chunks with markdown to HTML formatting using existing sendMarkdownMessage() helper
  • Created comprehensive test suite to verify markdown detection, HTML formatting, and end-to-end streaming behavior
  • Ensured fix is surgical and targeted - only affects Copilot status messages with GitHub links, preserves all existing functionality
  • All 106 tests passing, confirming no regressions introduced
  • Follow-up: Refactored function naming based on user feedback
    • Enhanced existing sendMarkdownMessage() function to automatically detect markdown content instead of creating new sendMessageSmart() function
    • Avoided function naming changes to reduce cognitive overhead and merge conflict potential
    • Generalized markdown detection to include links, code blocks, bold, italic, and headings
    • Replaced all message sending calls to use enhanced smart detection while preserving existing function names
    • All 110 tests continue to pass with comprehensive markdown support