Aim Flashlight, Water Currents, and Deep-Sea Atmosphere Update

Hi divers,

This build focuses on making deep dives feel clearer, more atmospheric, and more rewarding.

## Key Changes

### Deeper Underwater Atmosphere
The ocean now has stronger visual depth and mood.

- Improved lighting changes as you dive deeper
- Added darker deep-sea fog and clearer points of light
- Added more water movement and screen distortion for a stronger underwater feel

### New Aim Flashlight
Aiming in deep darkness now activates a focused light beam.

- Helps reveal what is directly ahead in dark zones
- Makes deep exploration easier to read without removing the danger
- Adds stronger tension when aiming near threats

### Dynamic Water Currents
Some areas now contain active water currents.

- Currents can push the diver while passing through them
- Current zones have clearer visual feedback
- Propulsion upgrades help reduce their impact

### Improved Seafloor Layout
Exploration spaces now feel more natural and varied.

- Added richer rock wall shapes
- Added seaweed and coral-covered wall textures
- Improved placement of chests, supply stations, and key rewards

### Supply Station Update
Supply stations are now easier to read and more useful during a dive.

- Added a visible charge progress ring
- Added stronger glow and particle feedback
- Stations can help restore oxygen while charging

### Fish and Reward Tuning
Catching sea life now has clearer rewards.

- Fish now grant more readable coin rewards
- Aggressive creatures have clearer risk and reward
- Elite targets have stronger visual and reward feedback

### Dive Feedback Improvements
Moment-to-moment dive feedback has been improved.

- Added stronger low-oxygen and pressure warnings
- Improved capture, hit, pickup, and upgrade feedback sounds
- Improved camera movement during swimming, aiming, pressure, and major events

### Fixes
- Fixed fish death animations facing the wrong direction
- Cleaned up several HUD elements so the dive view is less cluttered
- Updated textures and compression settings for more consistent visuals