v2.1: Add dynamic weather effects, clothing inventory, and bug fixes

Features:
- Add dynamic weather effects system (snow, rain, mist, sunshine, storm, wind, blizzard)
- Add separate Clothing tab in inventory system
- Weather effects auto-update based on Info Box weather field
- Combined effects for storm (rain+lightning) and blizzard (snow+wind)

Improvements:
- Settings migration system for automatic feature enablement
- Weather effects positioned behind chat interface (z-index: 1)
- Dynamic weather enabled by default for new users

Bug Fixes:
- Fix tab visibility issues (disabled tabs now properly hide)
- Fix theme-aware borders (remove hardcoded blue colors)
- Fix double scrollbar in Edit Trackers window
- Fix scroll position jumping when editing Present Characters
- Fix dynamic weather toggle hiding issue

Technical:
- Update inventory schema to v2.1 with clothing field
- Add automatic migration for existing v2 inventories
- Update parsers and prompts to handle clothing separately
- Add translations (EN/ZH-TW) for new features

src/types/inventory.js

@@ -8,6 +8,7 @@
  * @typedef {Object} InventoryV2
  * @property {number} version - Schema version (always 2)
  * @property {string} onPerson - Items currently carried/worn by the character (plaintext list)
+ * @property {string} clothing - Clothing and armor currently worn (plaintext list)
  * @property {Object.<string, string>} stored - Items stored at named locations (location name → plaintext list)
  * @property {string} assets - Character's vehicles, property, and major possessions (plaintext list)
  */