Abyss Dragon, Living Ecosystem, Equipment Growth, and Localization Update

Hi divers,

This build expands the deep-sea journey with new threats, stronger progression, richer rewards, and more ways to tune the game to your play style.

## Key Changes

### New Settings and Control Options
The game is now easier to configure before and during dives.

- Added resolution, fullscreen, windowed, and borderless display options
- Added volume controls for a better audio mix
- Added key binding support for player controls

### Living Deep-Sea Ecosystem
The ocean now feels more alive and reactive.

- Fish and deep-sea creatures have improved movement and behavior
- Creature populations now vary more clearly by depth
- Deep-sea resources, coral, seaweed, and terrain features are better integrated into exploration

### Abyss Dragon Encounter
A major abyssal threat has been added.

- Added the Abyss Dragon boss encounter
- Added clearer boss health and attack feedback
- Added new abyss rewards tied to major victories and high-risk dives

### Equipment and Workbench Progression
Long-term progression has been expanded.

- Added a broader equipment system with clearer upgrade paths
- Added powerful high-tier equipment effects
- Added new ring effects and rare abyss-related drops
- Improved equipment, backpack, and workbench UI flow

### Fish Coins and Reward Updates
Rewards are now clearer and more consistent.

- Updated the main reward currency to fish coins
- Improved reward feedback from catches, chests, and special drops
- Added new upgrade materials and rare reward opportunities
- Added reward bubbles and oxygen-related bonuses from advanced gear

### New Events, Buffs, and Deep-Dive Pressure
Dives can now shift in more dramatic ways.

- Added new dive events such as sudden fish surges and abyss crossing moments
- Added buff and danger states with clearer UI feedback
- Added oxygen leak pressure during risky encounters
- Added abyss gaze effects around key late-game moments

### Tutorial, Achievements, and Player Guidance
The game now gives players clearer goals.

- Added a starter tutorial for catching fish and collecting materials
- Added many new achievements for depth, returns, boss victories, gear, and challenge runs
- Improved guidance around important dive objectives and completion moments

### Localization and UI Improvements
More players can now enjoy the game comfortably.

- Added Traditional Chinese, Japanese, and Korean support
- Improved menu responsiveness and visual consistency
- Improved main menu, equipment previews, buff tooltips, and HUD readability

### Fixes and Polish
Several parts of the dive experience were cleaned up.

- Improved performance during dives
- Improved fish capture, death, and movement feedback
- Improved boss, oxygen failure, and return flow handling
- Fixed water current behavior in some edge cases
- Cleaned up older UI elements and outdated scene flow