Add Modern UI and Cross-Platform Mobile Support

[vaibhavmannq]

🎨 Modern UI Redesign

• Implemented sleek dark theme with cyan/teal and purple color scheme
• Added rounded corners and flat design elements for contemporary look
• Enhanced visual hierarchy with improved typography and spacing

📱 Cross-Platform Mobile Support

• Added responsive mobile interface optimized for portrait orientation
• Created platform-adaptive UI scaling

⚙️ Technical Improvements

• Enhanced argument parsing with mobile mode support
• Improved platform detection and configuration system
• Better grid layout calculations with bounds checking

[Copilot]

Pull Request Overview

This PR modernizes the Minesweeper UI with a dark flat theme and adds cross-platform mobile support by introducing dynamic configurations and rendering logic.

• Updated color palettes, tile/border radii, fonts, and button styles for a contemporary look.
• Added mobile detection and platform-adaptive constants to adjust grid dimensions, padding, and rendering.
• Refactored drawing methods in tile.py, grid.py, and game.py to use new constants and responsive layouts; simplified main.py argument parsing.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
minesweeper/tile.py	Replaced image blits with vector drawing for tiles and flags.
minesweeper/grid.py	Switched to modern palette and minimal spacing in draw_grid.
minesweeper/game.py	Introduced IS_MOBILE detection, adaptive constants, refactored layouts and UI methods.
main.py	Simplified CLI parsing and added --mobile flag support.

Comments suppressed due to low confidence (3)

minesweeper/game.py:23

• The code references sys.argv for mobile detection but sys is not imported in this file, which will cause a NameError. Add import sys at the top.

            '--mobile' in sys.argv or 

main.py:8

• The code uses argparse (and later sys) in this file without importing these modules, which will cause NameErrors. Add import argparse and import sys at the top of main.py.

    parser = argparse.ArgumentParser(description='Run Minesweeper game')

minesweeper/game.py:564

• The updated get_tile_at_pos no longer accounts for the horizontal grid offset, but callers still expect positioning to consider GRID_X_OFFSET. This will miscompute columns when the grid is centered. Reintroduce offset handling or adjust callers accordingly.

    def get_tile_at_pos(mouse_x: int, mouse_y: int, tile_size: int, buffer: int) -> tuple[int, int]: