Day 366 Project Rance — Skills Loadout & UI Refinement

26/10/2026 Added an optional active-skill loadout mode. Characters must equip learned active skills to use their abilities and effects; passive skills and the original mode remain unchanged. Added configurable slot limits, starting slots, level-based unlocks, per-character overrides, and saved loadouts so I can easily control the slots. Implemented skill drag-and-drop for equipping, replacing, moving, and removing skills. Refined Skills UI to match Inventory and Quests style. Fixed slot flashing during learning/equipping, incorrect slot display when switching characters, and unwanted hover scaling. Removed unnecessary markers and slot-count labels. Simplified multilevel tooltips: requirement separators, dimmed completed requirements, green/red current requirements, and locked future levels. Effects now highlight only the next level to learn; fully learned skills have no extra green background. Added optional frame alignment between the character list and skill tree. Added a subtle configurable frame connecting expanded slots to their character entry.