feat(games): add 3 new games + local bug reporting system

- Paddle Clash: 2P Pong with power-ups, spin, and fast rallies
- Neon Snake: Competitive head-to-head snake on shared grid
- Brick Bash: Classic breakout with power-ups and juicy feedback

All follow same principles: single-file, no build, instant play, local multiplayer friendly.

+ Bug Reports section on index using sql.js (pure client-side SQLite)
  - Stores in localStorage
  - Simple form with game + severity
  - View/clear locally (non-secure by design, git-resettable)

Updated gallery index with new cards and bug section.