Implement complete inventory system with equipment database

Features:
- HP Control component with damage/heal/direct modes (mobile-optimized)
- Conditions system with PF2e condition database
- Equipment database with 5,482 items from PF2e (weapons, armor, equipment)
- AddItemModal with search, category filters, and pagination
- Bulk tracking with encumbered/overburdened status display
- Item management (add, remove, toggle equipped)

Backend:
- Equipment module with search/filter endpoints
- Prisma migration for equipment detail fields
- Equipment seed script importing from JSON data files
- Extended Equipment model (damage, hands, AC, etc.)

Frontend:
- New components: HpControl, AddConditionModal, AddItemModal
- Improved character sheet with tabbed interface
- API methods for equipment search and item management

Documentation:
- CLAUDE.md with project philosophy and architecture decisions

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

server/prisma/schema.prisma

@@ -482,18 +482,41 @@ model Equipment {
   id              String  @id @default(uuid())
   name            String  @unique
   traits          String[]
-  itemCategory    String
+  itemCategory    String  // "Weapons", "Armor", "Consumables", "Shields", etc.
   itemSubcategory String?
-  bulk            String?
+  bulk            String? // "L" for light, "1", "2", etc.
   url             String?
   summary         String?
-  activation      String?
-  hands           String?
-  damage          String?
-  range           String?
-  weaponCategory  String?
-  price           Int?    // In CP
   level           Int?
+  price           Int?    // In CP
+
+  // Weapon-specific fields
+  hands           String?
+  damage          String? // "1d8 S", "1d6 P", etc.
+  damageType      String? // "S", "P", "B" (Slashing, Piercing, Bludgeoning)
+  range           String?
+  reload          String?
+  weaponCategory  String? // "Simple", "Martial", "Advanced", "Ammunition"
+  weaponGroup     String? // "Sword", "Axe", "Bow", etc.
+
+  // Armor-specific fields
+  ac              Int?
+  dexCap          Int?
+  checkPenalty    Int?
+  speedPenalty    Int?
+  strength        Int?    // Strength requirement
+  armorCategory   String? // "Unarmored", "Light", "Medium", "Heavy"
+  armorGroup      String? // "Leather", "Chain", "Plate", etc.
+
+  // Shield-specific fields
+  shieldHp        Int?
+  shieldHardness  Int?
+  shieldBt        Int?    // Broken Threshold
+
+  // Consumable/Equipment-specific fields
+  activation      String? // "Cast A Spell", "[one-action]", etc.
+  duration        String?
+  usage           String?
 
   characterItems CharacterItem[]
 }