feat(schema): Phase 1 Symbol Architecture — SymbolTemplate, TenantCategory, TenantSymbol refactor + seed + migration scripts

prisma/schema.prisma

@@ -90,6 +90,7 @@ model Tenant {
   iconCategories    IconCategory[]
   iconAssets        IconAsset[]
   tenantSymbols     TenantSymbol[]
+  tenantCategories  TenantCategory[]
   upgradeRequests   UpgradeRequest[]
   dictionaryEntries DictionaryEntry[]
   rapports          Rapport[]
@@ -392,10 +393,53 @@ model TenantSymbol {
   iconId String
   icon   IconAsset @relation(fields: [iconId], references: [id], onDelete: Cascade)
 
+  // New fields for Phase 1 Symbol Architecture
+  categoryId String?
+  category   TenantCategory? @relation(fields: [categoryId], references: [id], onDelete: SetNull)
+
+  name       String?  // Display name (migrated from customName || icon.name)
+  svgPath    String?  // e.g. "signaturen/TLF.svg" or tenant-specific MinIO key
+  isUploaded Boolean  @default(false)
+  migratedFromIconId String?
+
   @@index([tenantId])
+  @@index([categoryId])
   @@map("tenant_symbols")
 }
 
+// ─── Symbol Templates (global read-only packages) ─────────
+
+model SymbolTemplate {
+  id           String   @id @default(uuid())
+  packageId    String   // e.g. "feuerwehr-ch"
+  packageName  String   // e.g. "Feuerwehr Schweiz"
+  categoryName String   // e.g. "Fahrzeuge"
+  name         String
+  svgPath      String   // relative path in public/ or MinIO key
+  tags         String[] @default([])
+  sortOrder    Int      @default(0)
+
+  @@index([packageId])
+  @@map("symbol_templates")
+}
+
+// ─── Tenant Categories (per-tenant, user-managed) ─────────
+
+model TenantCategory {
+  id        String   @id @default(uuid())
+  tenantId  String
+  tenant    Tenant   @relation(fields: [tenantId], references: [id], onDelete: Cascade)
+  name      String
+  sortOrder Int      @default(0)
+  icon      String?  // Optional emoji or Lucide icon name for UI
+
+  symbols   TenantSymbol[]
+
+  @@unique([tenantId, name])
+  @@index([tenantId])
+  @@map("tenant_categories")
+}
+
 // ─── Dictionary (Global + Tenant word library) ────────────
 
 model DictionaryEntry {