Implements the complete frontend for BetterLoot profile management:
- Pinia store (loot.ts) with CRUD, import/export, apply-to-server actions
- LootBuilderView orchestrator with profile bar, modals, two-column layout
- LootContainerSidebar with categorized container list, search, config indicators
- LootItemEditor for per-container item settings and ungrouped item table
- LootItemPicker modal with searchable/filterable Rust item grid
- LootGroupEditor for reusable loot group management
- Router integration at /loot-builder
- Sidebar nav item with Crosshair icon and loot.view permission
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
