feat: Implement PF2e Alchemy and Rest system

Alchemy System:
- Versatile Vials tracking with refill functionality
- Research Field display (Bomber, Chirurgeon, Mutagenist, Toxicologist)
- Formula Book with search and level filtering
- Advanced Alchemy (daily preparation) for infused items
- Quick Alchemy using versatile vials
- Normal Alchemy for permanent crafted items
- Auto-upgrade system for formula variants (Lesser → Greater)
- Effect parsing with damage badges (damage type colors, splash, healing, bonus)
- German translations for all UI elements and item effects
- WebSocket sync for all alchemy state changes

Rest System:
- HP healing based on CON modifier × Level
- Condition management (Fatigued removed, Doomed/Drained reduced)
- Resource reset (spell slots, focus points, daily abilities)
- Alchemy reset (infused items expire, vials refilled)
- Rest modal with preview of changes

Database:
- CharacterAlchemyState model for vials and batch tracking
- CharacterFormula model for formula book
- CharacterPreparedItem model with isInfused flag
- Equipment effect field for variant-specific effects
- Translation germanEffect field for effect translations
- Scraped effect data from Archives of Nethys (205 items)

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

server/prisma/schema.prisma

@@ -97,6 +97,13 @@ enum TranslationQuality {
   LOW
 }
 
+enum ResearchField {
+  BOMBER
+  CHIRURGEON
+  MUTAGENIST
+  TOXICOLOGIST
+}
+
 // ==========================================
 // USER & AUTH
 // ==========================================
@@ -205,6 +212,11 @@ model Character {
   resources   CharacterResource[]
   battleTokens BattleToken[]
   documentAccess DocumentAccess[]
+
+  // Alchemy
+  alchemyState   CharacterAlchemyState?
+  formulas       CharacterFormula[]
+  preparedItems  CharacterPreparedItem[]
 }
 
 model CharacterAbility {
@@ -308,6 +320,56 @@ model CharacterResource {
   @@unique([characterId, name])
 }
 
+// ==========================================
+// ALCHEMY SYSTEM
+// ==========================================
+
+model CharacterAlchemyState {
+  id                      String         @id @default(uuid())
+  characterId             String         @unique
+  researchField           ResearchField?
+  versatileVialsCurrent   Int            @default(0)
+  versatileVialsMax       Int            @default(0)
+  advancedAlchemyBatch    Int            @default(0)
+  advancedAlchemyMax      Int            @default(0)
+  lastRestAt              DateTime?
+
+  character Character @relation(fields: [characterId], references: [id], onDelete: Cascade)
+}
+
+model CharacterFormula {
+  id            String  @id @default(uuid())
+  characterId   String
+  equipmentId   String
+  name          String
+  nameGerman    String?
+  learnedAt     Int     @default(1)
+  formulaSource String? // "Pathbuilder Import", "Purchased", "Found"
+
+  character Character @relation(fields: [characterId], references: [id], onDelete: Cascade)
+  equipment Equipment @relation(fields: [equipmentId], references: [id])
+
+  @@unique([characterId, equipmentId])
+  @@index([characterId])
+}
+
+model CharacterPreparedItem {
+  id              String   @id @default(uuid())
+  characterId     String
+  equipmentId     String
+  name            String
+  nameGerman      String?
+  quantity        Int      @default(1)
+  isQuickAlchemy  Boolean  @default(false)
+  isInfused       Boolean  @default(true)  // Infused items expire on rest, permanent items don't
+  createdAt       DateTime @default(now())
+
+  character Character @relation(fields: [characterId], references: [id], onDelete: Cascade)
+  equipment Equipment @relation(fields: [equipmentId], references: [id])
+
+  @@index([characterId])
+}
+
 // ==========================================
 // BATTLE SYSTEM
 // ==========================================
@@ -558,8 +620,11 @@ model Equipment {
   activation      String? // "Cast A Spell", "[one-action]", etc.
   duration        String?
   usage           String?
+  effect          String? // Specific effect text for item variants (Lesser, Moderate, Greater, Major)
 
-  characterItems CharacterItem[]
+  characterItems   CharacterItem[]
+  formulas         CharacterFormula[]
+  preparedItems    CharacterPreparedItem[]
 }
 
 model Spell {
@@ -596,6 +661,7 @@ model Translation {
   germanName          String
   germanSummary       String?
   germanDescription   String?
+  germanEffect        String?            // Translated effect text for alchemical items
   quality             TranslationQuality @default(MEDIUM)
   translatedBy        String             @default("claude-api")
   createdAt           DateTime           @default(now())