UI Overhaul & Smoother Fish Swimming

This update gives the game a cleaner, more modern look and improves how your fish move.

User Interface
- Redesigned the entire UI with a refreshed color palette and consistent, modern styling.
- New compact info panel (level, money, EXP, tank capacity) that takes up less space and is easier to read.
- Reworked the fish detail panel: action buttons now stack neatly with no empty gaps.
- Cleaned up the Store, Settings, and How to Play menus for a more professional feel.
- Bottom menu buttons now use clear text labels instead of icons (fully localized).
- Fixed the language dropdown so the options are now clearly readable.

Gameplay
- Replaced the old jittery fish animation with a smooth, natural swimming motion. Fish now gently glide and tilt as they swim up and down.

Thanks for playing!