feat: Create HTML structure and canvas setup for Flappy Bird game

[cyrusagent]

Summary

This PR implements the foundational HTML structure and canvas setup for the Flappy Bird game as specified in TEST-125.

Changes Made

• ✅ Created index.html with proper DOCTYPE and HTML5 structure
• ✅ Added canvas element with 320x480 dimensions
• ✅ Implemented responsive design with viewport meta tag
• ✅ Created game container div with modern glass-morphism styling
• ✅ Added gradient background and professional page styling
• ✅ Included mobile-friendly media queries for screens <400px

Technical Details

• Canvas: 320x480 pixels with ID gameCanvas for JavaScript access
• Styling: Modern CSS with flexbox centering, gradient backgrounds, and visual effects
• Mobile: Responsive design with adaptive canvas sizing
• Container: Glass-morphism effect with backdrop blur and rounded corners

Acceptance Criteria Status

All acceptance criteria from TEST-125 have been fully met:

• Create index.html with proper DOCTYPE and meta tags
• Add a canvas element with appropriate dimensions (e.g., 320x480)
• Include basic CSS for centering the canvas and setting background
• Create a simple game container div
• Add viewport meta tag for mobile responsiveness
• Include title and basic page styling

Next Steps

This provides the foundation for implementing:

• Game logic and bird physics
• Pipe generation and collision detection
• Score tracking and game states
• User input handling

Resolves TEST-125

🤖 Generated with Claude Code