### New Features
- Added the "Mentor's Trial" minigame. After 10 consecutive failed main-quest submissions, players enter a particle sorting challenge; completing it resets the patience progress and returns the game to the normal flow.
- Expanded the particle and liquid presentation systems. Water, wine, blood, and alcohol now have dedicated liquid particle parameters, while wood ash now has a particle-container setup and custom fragment assets.
- Improved loading, opening, and scene handoff behavior. A new `LoadingOverlay` autoload reduces the risk of black screens or flicker during scene transitions.
### Changes And Improvements
- Changed the Level 2 main objective to `Water` + `WoodAsh`, bringing the new liquid and wood ash particle workflows into the current core progression.
- Adjusted some Level 1 and Level 2 rewards and timeline spawns: the peppermint bottle now spawns through material configuration, and blood, water, alcohol, and wood ash have been added to the reward chain.
- Adjusted inventory slot alignment and unique node IDs to improve item return consistency and save/load placement.
- Improved tool-following and mouse-label positioning. Labels now use the active tool's visual bounds so they do not sit too close to the tool graphic.
- Improved lifting platform and submit-zone detection. Submit-zone candidates are refreshed and the submit area under the lifting tray is now handled more reliably.
- Adjusted the opening black cover, loading progress, and full-scene handoff flow so the transition from resource loading to gameplay feels more continuous.
### Fixes
- Fixed particle containers potentially shifting, disappearing, or failing to track the target inventory slot when items return after a failed submission.
- Fixed long typewriter dialogue boxes calculating too little height, which could squeeze text into a narrow strip.
- Fixed physics/visual coordinate mismatches for particle containers under different parents, scales, and clipping areas, with extra debug output added for diagnosing abnormal particles.
- Fixed overly high item layering inside the lifting tray area, which could create unnatural overlap.
- Fixed main-quest error counts not clearing immediately after a successful submission, preventing stale patience progress from lingering.
- Fixed loading-scene leftovers, old-scene cleanup, and unstable opening black-cover states when entering the game from a save.