feat(crm): add company detail overhaul with industries, account types, relationship types

- Backend: new CRUD services/controllers for Industries, AccountTypes,
  RelationshipTypes, CompanyRelationships with Prisma schema migration
- Frontend: new hooks, API functions, and types for all config entities
- CompanyDetailPage redesign with ActivityFeed, RelationshipsCard
- CompanyFormModal extended with industry, account type, owner fields
- Activities service now supports companyId filter + includeContacts

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/crm-service/Summarize.md

@@ -1,6 +1,6 @@
 # CRM-Service - Zusammenfassung
 
-## Stand: 2026-03-10
+## Stand: 2026-03-11
 
 ### Was wurde erstellt
 
@@ -26,13 +26,17 @@ packages/crm-service/
     redis/              — RedisService (Token-Blocklist, Cache, Distributed Locks)
     auth/               — JWT Strategy (RS256), JwtAuthGuard, RolesGuard, TenantGuard
     common/             — Decorators (@Public, @Roles, @CurrentUser), Pagination, ExceptionFilter
-    companies/          — CRUD: Unternehmen (mit Lexware ERP-Push bei Update)
+    companies/          — CRUD: Unternehmen (mit Lexware ERP-Push, industryId, accountTypeId, ownerId)
     contacts/           — CRUD: Kontakte (mit Lexware ERP-Push bei Update)
-    activities/         — CRUD: Aktivitaeten (NOTE, CALL, EMAIL, MEETING, TASK)
+    activities/         — CRUD: Aktivitaeten (NOTE, CALL, EMAIL, MEETING, TASK; contactId+companyId optional)
     pipelines/          — CRUD: Sales-Pipelines mit Stages (inkl. Stage-Update)
     deals/              — CRUD: Vorgaenge mit Pipeline/Stage/Contact/Company + DealVouchers
+    industries/         — CRUD: Branchen (admin-konfigurierbar, mit Farbe)
+    account-types/      — CRUD: Kontotypen (admin-konfigurierbar)
+    relationship-types/ — CRUD: Beziehungstypen (admin-konfigurierbar)
+    company-relationships/ — Company-zu-Company Beziehungen (N:M, bidirektional)
     health/             — Health-Check (DB, Redis, Lexware)
-    lexware/            — Lexware Office Integration (NEU)
+    lexware/            — Lexware Office Integration
       lexware.module.ts              — Feature Module (HttpModule + ScheduleModule)
       lexware-client.service.ts      — Rate-limitierter HTTP Client (Token Bucket, 2 req/s)
       lexware-contacts.service.ts    — Kontakt-Suche, Link, Import, Push, Sync
@@ -49,29 +53,40 @@ packages/crm-service/
 
 ### Datenbank-Modelle (app_crm Schema)
 
-- **Company** — Unternehmen mit Lexware-Verknuepfung (lexwareContactId, lexwareContactVersion, lexwareSyncedAt)
+- **Company** — Unternehmen mit industryId, accountTypeId, ownerId, Lexware-Verknuepfung
 - **Contact** — Kontakte mit optionaler Lexware-Verknuepfung
-- **Activity** — Aktivitaeten verknuepft mit Kontakten
+- **Activity** — Aktivitaeten verknuepft mit Kontakten UND/ODER Companies (contactId + companyId beide optional, min. 1)
 - **Pipeline** — Konfigurierbare Sales-Pipelines pro Tenant
 - **PipelineStage** — Stufen innerhalb einer Pipeline
 - **Deal** — Vorgaenge mit dealVouchers-Relation zu Lexware-Belegen
-- **LexwareVoucher** (NEU) — Gecachte Belege aus Lexware Office (Angebote, Auftraege, Rechnungen, Gutschriften)
+- **Industry** — Admin-konfigurierbare Branchen mit Farbe (unique pro Tenant)
-- **DealVoucher** (NEU) — Join-Table Deal <-> Beleg (m:n mit Audit-Trail)
+- **AccountType** — Admin-konfigurierbare Kontotypen (unique pro Tenant)
+- **RelationshipType** — Admin-konfigurierbare Beziehungstypen (unique pro Tenant)
+- **CompanyRelationship** — N:M Company-zu-Company Beziehungen mit Typ und Notizen
+- **Contract** — Vertraege (DB-Modell vorhanden, UI-Platzhalter)
+- **LexwareVoucher** — Gecachte Belege aus Lexware Office
+- **DealVoucher** — Join-Table Deal <-> Beleg (m:n mit Audit-Trail)
 
 ### Entity-Beziehungen
 
 ```
-Company (1) --< (n) Contact          — companyId (optional, SetNull)
+Company (1) --< (n) Contact              — companyId (optional, SetNull)
-Company (1) --< (n) Deal             — companyId (optional, SetNull)
+Company (1) --< (n) Deal                 — companyId (optional, SetNull)
-Company (1) --< (n) LexwareVoucher   — companyId (optional, SetNull)
+Company (1) --< (n) Activity             — companyId (optional, SetNull)
-Contact (1) --< (n) Activity         — contactId (Cascade)
+Company (1) --< (n) LexwareVoucher       — companyId (optional, SetNull)
-Contact (1) --< (n) Deal             — contactId (optional, SetNull)
+Company (n) >--< (n) Company             — via CompanyRelationship (bidirektional)
-Contact (1) --< (n) LexwareVoucher   — contactId (optional, SetNull)
+Company (1) --< (n) Contract             — companyId (Cascade)
-Pipeline (1) --< (n) PipelineStage   — pipelineId (Cascade)
+Company (n) -->  (1) Industry            — industryId (optional, SetNull)
-Pipeline (1) --< (n) Deal            — pipelineId (Cascade)
+Company (n) -->  (1) AccountType         — accountTypeId (optional, SetNull)
-PipelineStage (1) --< (n) Deal       — stageId
+Contact (1) --< (n) Activity             — contactId (optional, SetNull)
-Deal (1) --< (n) DealVoucher         — dealId (Cascade)
+Contact (1) --< (n) Deal                 — contactId (optional, SetNull)
-LexwareVoucher (1) --< (n) DealVoucher — voucherId (Cascade)
+Contact (1) --< (n) LexwareVoucher       — contactId (optional, SetNull)
+Pipeline (1) --< (n) PipelineStage       — pipelineId (Cascade)
+Pipeline (1) --< (n) Deal                — pipelineId (Cascade)
+PipelineStage (1) --< (n) Deal           — stageId
+Deal (1) --< (n) DealVoucher             — dealId (Cascade)
+LexwareVoucher (1) --< (n) DealVoucher   — voucherId (Cascade)
+RelationshipType (1) --< (n) CompanyRelationship — relationshipTypeId
 ```
 
 ### API-Endpunkte
@@ -82,8 +97,17 @@ LexwareVoucher (1) --< (n) DealVoucher — voucherId (Cascade)
 | GET/PATCH/DELETE | /api/v1/crm/companies/:id | Detail / Update / Delete |
 | GET/POST | /api/v1/crm/contacts | Liste / Erstellen |
 | GET/PATCH/DELETE | /api/v1/crm/contacts/:id | Detail / Update / Delete |
-| GET/POST | /api/v1/crm/activities | Liste / Erstellen |
+| GET/POST | /api/v1/crm/activities | Liste / Erstellen (companyId+includeContacts fuer aggregierten Feed) |
 | GET/PATCH/DELETE | /api/v1/crm/activities/:id | Detail / Update / Delete |
+| GET/POST | /api/v1/crm/industries | Branchen verwalten |
+| PATCH/DELETE | /api/v1/crm/industries/:id | Branche bearbeiten / loeschen |
+| GET/POST | /api/v1/crm/account-types | Kontotypen verwalten |
+| PATCH/DELETE | /api/v1/crm/account-types/:id | Kontotyp bearbeiten / loeschen |
+| GET/POST | /api/v1/crm/relationship-types | Beziehungstypen verwalten |
+| PATCH/DELETE | /api/v1/crm/relationship-types/:id | Beziehungstyp bearbeiten / loeschen |
+| GET/POST | /api/v1/crm/companies/:id/relationships | Beziehungen verwalten |
+| DELETE | /api/v1/crm/companies/:id/relationships/:relId | Beziehung loeschen |
+| GET | /api/v1/crm/users | Tenant-User fuer Owner-Dropdown |
 | GET/POST | /api/v1/crm/pipelines | Liste / Erstellen |
 | GET/PATCH/DELETE | /api/v1/crm/pipelines/:id | Detail / Update / Delete |
 | POST/DELETE | /api/v1/crm/pipelines/:id/stages | Stage hinzufuegen/entfernen |
@@ -141,14 +165,17 @@ LexwareVoucher (1) --< (n) DealVoucher — voucherId (Cascade)
 - Prisma Migrationen:
   - `20260310163211_init` — Initiales Schema
   - `20260310183117_add_companies` — Company-Entity
-  - `20260310_add_lexware_integration` — Lexware Office Integration (AUSSTEHEND)
+  - `20260310_add_lexware_integration` — Lexware Office Integration
+  - `20260311_add_company_detail_overhaul` — Company Detail Overhaul (Industry, AccountType, RelationshipType, CompanyRelationship, Contract, Activity companyId)
 
 ### Naechste Schritte
 
-1. Migration `20260310_add_lexware_integration` auf Server anwenden
+1. Migration `20260311_add_company_detail_overhaul` auf Server anwenden
-2. `LEXWARE_API_KEY` in `.env` auf Server setzen
+2. Seed-Data (Industries, AccountTypes, RelationshipTypes) ausfuehren
 3. Container neu bauen und deployen
-4. Lexware-Endpunkte auf Server testen
+4. Frontend testen: CompanyDetailPage 3-Spalten Layout
-5. Frontend: Lexware-Integration in Company/Contact/Deal-Detail-Seiten
+5. CRM-Einstellungen: Branchen/Kontotypen/Beziehungstypen verwalten
-6. Activity-Liste komplett laden (UI-Button "Alle anzeigen")
+6. CompanyFormModal: Dropdowns testen
-7. Kanban-Board fuer Vorgaenge
+7. Activity Feed: Aggregierten Feed testen
+8. Kanban-Board fuer Vorgaenge
+9. Vertraege-UI implementieren (DB-Modell bereits vorhanden)

packages/crm-service/prisma/crm.schema.prisma

@@ -17,6 +17,64 @@ datasource db {
   schemas   = ["app_crm"]
 }
 
+// --------------------------------------------------------
+// Industry - Branche (admin-konfigurierbar pro Tenant)
+// --------------------------------------------------------
+model Industry {
+  id        String   @id @default(uuid()) @db.Uuid
+  tenantId  String   @map("tenant_id") @db.Uuid
+  name      String   @db.VarChar(100)
+  color     String   @default("#6B7280") @db.VarChar(7)
+  sortOrder Int      @default(0) @map("sort_order")
+  createdAt DateTime @default(now()) @map("created_at")
+  updatedAt DateTime @updatedAt @map("updated_at")
+
+  companies Company[]
+
+  @@unique([tenantId, name])
+  @@index([tenantId])
+  @@map("industries")
+  @@schema("app_crm")
+}
+
+// --------------------------------------------------------
+// AccountType - Kontotyp (admin-konfigurierbar pro Tenant)
+// --------------------------------------------------------
+model AccountType {
+  id        String   @id @default(uuid()) @db.Uuid
+  tenantId  String   @map("tenant_id") @db.Uuid
+  name      String   @db.VarChar(100)
+  sortOrder Int      @default(0) @map("sort_order")
+  createdAt DateTime @default(now()) @map("created_at")
+  updatedAt DateTime @updatedAt @map("updated_at")
+
+  companies Company[]
+
+  @@unique([tenantId, name])
+  @@index([tenantId])
+  @@map("account_types")
+  @@schema("app_crm")
+}
+
+// --------------------------------------------------------
+// RelationshipType - Beziehungstyp (admin-konfigurierbar)
+// --------------------------------------------------------
+model RelationshipType {
+  id        String   @id @default(uuid()) @db.Uuid
+  tenantId  String   @map("tenant_id") @db.Uuid
+  name      String   @db.VarChar(100)
+  sortOrder Int      @default(0) @map("sort_order")
+  createdAt DateTime @default(now()) @map("created_at")
+  updatedAt DateTime @updatedAt @map("updated_at")
+
+  relationships CompanyRelationship[]
+
+  @@unique([tenantId, name])
+  @@index([tenantId])
+  @@map("relationship_types")
+  @@schema("app_crm")
+}
+
 // --------------------------------------------------------
 // Company - Unternehmen (uebergeordnete Entity)
 // --------------------------------------------------------
@@ -27,6 +85,12 @@ model Company {
   name     String  @db.VarChar(200)
   industry String? @db.VarChar(100)
 
+  // Admin-konfigurierbare Felder
+  industryId    String? @map("industry_id") @db.Uuid
+  accountTypeId String? @map("account_type_id") @db.Uuid
+  ownerId       String? @map("owner_id") @db.Uuid
+  ownerName     String? @map("owner_name") @db.VarChar(200)
+
   // Kontaktdaten
   email   String? @db.VarChar(255)
   phone   String? @db.VarChar(50)
@@ -58,14 +122,22 @@ model Company {
   updatedAt DateTime @updatedAt @map("updated_at")
 
   // Relationen
-  contacts        Contact[]
+  industryRef          Industry?              @relation(fields: [industryId], references: [id], onDelete: SetNull)
-  deals           Deal[]
+  accountType          AccountType?           @relation(fields: [accountTypeId], references: [id], onDelete: SetNull)
-  lexwareVouchers LexwareVoucher[]
+  contacts             Contact[]
+  deals                Deal[]
+  activities           Activity[]
+  lexwareVouchers      LexwareVoucher[]
+  relationships        CompanyRelationship[]  @relation("companyRelationships")
+  relatedRelationships CompanyRelationship[]  @relation("relatedCompanyRelationships")
+  contracts            Contract[]
 
   @@unique([tenantId, lexwareContactId])
   @@index([tenantId])
   @@index([tenantId, name])
   @@index([tenantId, industry])
+  @@index([tenantId, industryId])
+  @@index([tenantId, accountTypeId])
   @@index([tenantId, isActive])
   @@map("companies")
   @@schema("app_crm")
@@ -149,7 +221,8 @@ enum ContactType {
 model Activity {
   id          String       @id @default(uuid()) @db.Uuid
   tenantId    String       @map("tenant_id") @db.Uuid
-  contactId   String       @map("contact_id") @db.Uuid
+  contactId   String?      @map("contact_id") @db.Uuid
+  companyId   String?      @map("company_id") @db.Uuid
   type        ActivityType
   subject     String       @db.VarChar(500)
   description String?      @db.Text
@@ -166,10 +239,12 @@ model Activity {
   updatedAt DateTime @updatedAt @map("updated_at")
 
   // Relationen
-  contact Contact @relation(fields: [contactId], references: [id], onDelete: Cascade)
+  contact Contact? @relation(fields: [contactId], references: [id], onDelete: Cascade)
+  company Company? @relation(fields: [companyId], references: [id], onDelete: Cascade)
 
   @@index([tenantId])
   @@index([tenantId, contactId])
+  @@index([tenantId, companyId])
   @@index([tenantId, type])
   @@index([tenantId, scheduledAt])
   @@map("activities")
@@ -186,6 +261,67 @@ enum ActivityType {
   @@schema("app_crm")
 }
 
+// --------------------------------------------------------
+// CompanyRelationship - Beziehungen zwischen Unternehmen (N:M)
+// --------------------------------------------------------
+model CompanyRelationship {
+  id                 String   @id @default(uuid()) @db.Uuid
+  tenantId           String   @map("tenant_id") @db.Uuid
+  companyId          String   @map("company_id") @db.Uuid
+  relatedCompanyId   String   @map("related_company_id") @db.Uuid
+  relationshipTypeId String   @map("relationship_type_id") @db.Uuid
+  notes              String?  @db.Text
+  createdBy          String   @map("created_by") @db.Uuid
+  createdAt          DateTime @default(now()) @map("created_at")
+
+  // Relationen
+  company          Company          @relation("companyRelationships", fields: [companyId], references: [id], onDelete: Cascade)
+  relatedCompany   Company          @relation("relatedCompanyRelationships", fields: [relatedCompanyId], references: [id], onDelete: Cascade)
+  relationshipType RelationshipType @relation(fields: [relationshipTypeId], references: [id], onDelete: Restrict)
+
+  @@unique([companyId, relatedCompanyId, relationshipTypeId])
+  @@index([tenantId])
+  @@index([tenantId, companyId])
+  @@index([tenantId, relatedCompanyId])
+  @@map("company_relationships")
+  @@schema("app_crm")
+}
+
+// --------------------------------------------------------
+// Contract - Vertraege (Platzhalter fuer zukuenftiges Modul)
+// --------------------------------------------------------
+model Contract {
+  id        String         @id @default(uuid()) @db.Uuid
+  tenantId  String         @map("tenant_id") @db.Uuid
+  companyId String         @map("company_id") @db.Uuid
+  title     String         @db.VarChar(255)
+  status    ContractStatus @default(DRAFT)
+  startDate DateTime?      @map("start_date")
+  endDate   DateTime?      @map("end_date")
+  value     Decimal?       @db.Decimal(15, 2)
+  currency  String         @default("EUR") @db.VarChar(3)
+  notes     String?        @db.Text
+  createdBy String         @map("created_by") @db.Uuid
+  createdAt DateTime       @default(now()) @map("created_at")
+  updatedAt DateTime       @updatedAt @map("updated_at")
+
+  // Relationen
+  company Company @relation(fields: [companyId], references: [id], onDelete: Cascade)
+
+  @@index([tenantId, companyId])
+  @@map("contracts")
+  @@schema("app_crm")
+}
+
+enum ContractStatus {
+  DRAFT
+  ACTIVE
+  EXPIRED
+  CANCELLED
+
+  @@schema("app_crm")
+}
+
 // --------------------------------------------------------
 // Pipeline - Sales-Pipelines (konfigurierbar pro Tenant)
 // --------------------------------------------------------

packages/crm-service/prisma/migrations/20260311_add_company_detail_overhaul/migration.sql

@@ -0,0 +1,217 @@
+-- ============================================================
+-- Company Detail Overhaul - Schema Migration
+-- ============================================================
+-- Neue Tabellen: industries, account_types, relationship_types,
+--                company_relationships, contracts
+-- Neue Enums: ContractStatus
+-- Erweiterte Tabellen: companies (industryId, accountTypeId, ownerId),
+--                      activities (contactId optional, companyId neu)
+-- ============================================================
+
+-- ContractStatus Enum
+CREATE TYPE "app_crm"."ContractStatus" AS ENUM ('DRAFT', 'ACTIVE', 'EXPIRED', 'CANCELLED');
+
+-- --------------------------------------------------------
+-- Industries (Branchen, admin-konfigurierbar)
+-- --------------------------------------------------------
+CREATE TABLE "app_crm"."industries" (
+  "id" UUID NOT NULL DEFAULT gen_random_uuid(),
+  "tenant_id" UUID NOT NULL,
+  "name" VARCHAR(100) NOT NULL,
+  "color" VARCHAR(7) NOT NULL DEFAULT '#6B7280',
+  "sort_order" INTEGER NOT NULL DEFAULT 0,
+  "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  "updated_at" TIMESTAMP(3) NOT NULL,
+
+  CONSTRAINT "industries_pkey" PRIMARY KEY ("id")
+);
+
+CREATE UNIQUE INDEX "industries_tenant_id_name_key"
+  ON "app_crm"."industries"("tenant_id", "name");
+
+CREATE INDEX "industries_tenant_id_idx"
+  ON "app_crm"."industries"("tenant_id");
+
+-- --------------------------------------------------------
+-- AccountTypes (Kontotypen, admin-konfigurierbar)
+-- --------------------------------------------------------
+CREATE TABLE "app_crm"."account_types" (
+  "id" UUID NOT NULL DEFAULT gen_random_uuid(),
+  "tenant_id" UUID NOT NULL,
+  "name" VARCHAR(100) NOT NULL,
+  "sort_order" INTEGER NOT NULL DEFAULT 0,
+  "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  "updated_at" TIMESTAMP(3) NOT NULL,
+
+  CONSTRAINT "account_types_pkey" PRIMARY KEY ("id")
+);
+
+CREATE UNIQUE INDEX "account_types_tenant_id_name_key"
+  ON "app_crm"."account_types"("tenant_id", "name");
+
+CREATE INDEX "account_types_tenant_id_idx"
+  ON "app_crm"."account_types"("tenant_id");
+
+-- --------------------------------------------------------
+-- RelationshipTypes (Beziehungstypen, admin-konfigurierbar)
+-- --------------------------------------------------------
+CREATE TABLE "app_crm"."relationship_types" (
+  "id" UUID NOT NULL DEFAULT gen_random_uuid(),
+  "tenant_id" UUID NOT NULL,
+  "name" VARCHAR(100) NOT NULL,
+  "sort_order" INTEGER NOT NULL DEFAULT 0,
+  "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  "updated_at" TIMESTAMP(3) NOT NULL,
+
+  CONSTRAINT "relationship_types_pkey" PRIMARY KEY ("id")
+);
+
+CREATE UNIQUE INDEX "relationship_types_tenant_id_name_key"
+  ON "app_crm"."relationship_types"("tenant_id", "name");
+
+CREATE INDEX "relationship_types_tenant_id_idx"
+  ON "app_crm"."relationship_types"("tenant_id");
+
+-- --------------------------------------------------------
+-- Company: Neue Felder hinzufuegen
+-- --------------------------------------------------------
+ALTER TABLE "app_crm"."companies"
+  ADD COLUMN "industry_id" UUID,
+  ADD COLUMN "account_type_id" UUID,
+  ADD COLUMN "owner_id" UUID,
+  ADD COLUMN "owner_name" VARCHAR(200);
+
+-- Indizes fuer neue FK-Felder
+CREATE INDEX "companies_tenant_id_industry_id_idx"
+  ON "app_crm"."companies"("tenant_id", "industry_id");
+
+CREATE INDEX "companies_tenant_id_account_type_id_idx"
+  ON "app_crm"."companies"("tenant_id", "account_type_id");
+
+-- Foreign Keys
+ALTER TABLE "app_crm"."companies"
+  ADD CONSTRAINT "companies_industry_id_fkey"
+    FOREIGN KEY ("industry_id") REFERENCES "app_crm"."industries"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+ALTER TABLE "app_crm"."companies"
+  ADD CONSTRAINT "companies_account_type_id_fkey"
+    FOREIGN KEY ("account_type_id") REFERENCES "app_crm"."account_types"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- --------------------------------------------------------
+-- Activity: contactId optional machen, companyId hinzufuegen
+-- --------------------------------------------------------
+ALTER TABLE "app_crm"."activities"
+  ALTER COLUMN "contact_id" DROP NOT NULL;
+
+ALTER TABLE "app_crm"."activities"
+  ADD COLUMN "company_id" UUID;
+
+-- Index fuer companyId
+CREATE INDEX "activities_tenant_id_company_id_idx"
+  ON "app_crm"."activities"("tenant_id", "company_id");
+
+-- Foreign Key fuer companyId
+ALTER TABLE "app_crm"."activities"
+  ADD CONSTRAINT "activities_company_id_fkey"
+    FOREIGN KEY ("company_id") REFERENCES "app_crm"."companies"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- --------------------------------------------------------
+-- CompanyRelationship (N:M Beziehungen zwischen Unternehmen)
+-- --------------------------------------------------------
+CREATE TABLE "app_crm"."company_relationships" (
+  "id" UUID NOT NULL DEFAULT gen_random_uuid(),
+  "tenant_id" UUID NOT NULL,
+  "company_id" UUID NOT NULL,
+  "related_company_id" UUID NOT NULL,
+  "relationship_type_id" UUID NOT NULL,
+  "notes" TEXT,
+  "created_by" UUID NOT NULL,
+  "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+  CONSTRAINT "company_relationships_pkey" PRIMARY KEY ("id")
+);
+
+CREATE UNIQUE INDEX "company_relationships_company_id_related_company_id_relationship_type_id_key"
+  ON "app_crm"."company_relationships"("company_id", "related_company_id", "relationship_type_id");
+
+CREATE INDEX "company_relationships_tenant_id_idx"
+  ON "app_crm"."company_relationships"("tenant_id");
+
+CREATE INDEX "company_relationships_tenant_id_company_id_idx"
+  ON "app_crm"."company_relationships"("tenant_id", "company_id");
+
+CREATE INDEX "company_relationships_tenant_id_related_company_id_idx"
+  ON "app_crm"."company_relationships"("tenant_id", "related_company_id");
+
+ALTER TABLE "app_crm"."company_relationships"
+  ADD CONSTRAINT "company_relationships_company_id_fkey"
+    FOREIGN KEY ("company_id") REFERENCES "app_crm"."companies"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+ALTER TABLE "app_crm"."company_relationships"
+  ADD CONSTRAINT "company_relationships_related_company_id_fkey"
+    FOREIGN KEY ("related_company_id") REFERENCES "app_crm"."companies"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+ALTER TABLE "app_crm"."company_relationships"
+  ADD CONSTRAINT "company_relationships_relationship_type_id_fkey"
+    FOREIGN KEY ("relationship_type_id") REFERENCES "app_crm"."relationship_types"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
+
+-- --------------------------------------------------------
+-- Contract (Vertraege - Platzhalter)
+-- --------------------------------------------------------
+CREATE TABLE "app_crm"."contracts" (
+  "id" UUID NOT NULL DEFAULT gen_random_uuid(),
+  "tenant_id" UUID NOT NULL,
+  "company_id" UUID NOT NULL,
+  "title" VARCHAR(255) NOT NULL,
+  "status" "app_crm"."ContractStatus" NOT NULL DEFAULT 'DRAFT',
+  "start_date" TIMESTAMP(3),
+  "end_date" TIMESTAMP(3),
+  "value" DECIMAL(15,2),
+  "currency" VARCHAR(3) NOT NULL DEFAULT 'EUR',
+  "notes" TEXT,
+  "created_by" UUID NOT NULL,
+  "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  "updated_at" TIMESTAMP(3) NOT NULL,
+
+  CONSTRAINT "contracts_pkey" PRIMARY KEY ("id")
+);
+
+CREATE INDEX "contracts_tenant_id_company_id_idx"
+  ON "app_crm"."contracts"("tenant_id", "company_id");
+
+ALTER TABLE "app_crm"."contracts"
+  ADD CONSTRAINT "contracts_company_id_fkey"
+    FOREIGN KEY ("company_id") REFERENCES "app_crm"."companies"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- --------------------------------------------------------
+-- Daten-Migration: Bestehende industry-Freitext-Werte migrieren
+-- --------------------------------------------------------
+-- Hinweis: Diese Migration erstellt Industry-Records aus bestehenden
+-- Freitext-Werten. Das alte industry-Feld bleibt bestehen als Fallback.
+-- In einer spaeteren Migration kann es entfernt werden.
+
+-- Schritt 1: Unique industry-Werte als Industry-Records erstellen
+INSERT INTO "app_crm"."industries" ("id", "tenant_id", "name", "color", "sort_order", "created_at", "updated_at")
+SELECT
+  gen_random_uuid(),
+  c."tenant_id",
+  c."industry",
+  '#6B7280',
+  0,
+  NOW(),
+  NOW()
+FROM (
+  SELECT DISTINCT "tenant_id", "industry"
+  FROM "app_crm"."companies"
+  WHERE "industry" IS NOT NULL AND "industry" != ''
+) c
+ON CONFLICT ("tenant_id", "name") DO NOTHING;
+
+-- Schritt 2: industry_id auf Companies setzen
+UPDATE "app_crm"."companies" co
+SET "industry_id" = i."id"
+FROM "app_crm"."industries" i
+WHERE co."tenant_id" = i."tenant_id"
+  AND co."industry" = i."name"
+  AND co."industry" IS NOT NULL
+  AND co."industry" != '';

packages/crm-service/prisma/seed-config-data.sql

@@ -0,0 +1,46 @@
+-- ============================================================
+-- INSIGHT CRM - Default Konfigurationsdaten (Seed)
+-- ============================================================
+-- Ausfuehrung: Manuell nach Migration auf dem Server
+-- Hinweis: {TENANT_ID} muss durch die echte Tenant-UUID ersetzt werden
+-- ============================================================
+
+-- Ersetze diese Variable mit der echten Tenant-ID:
+-- SET session my.tenant_id = 'DEINE-TENANT-UUID-HIER';
+
+-- --------------------------------------------------------
+-- Default Industries (Branchen)
+-- --------------------------------------------------------
+INSERT INTO "app_crm"."industries" ("id", "tenant_id", "name", "color", "sort_order", "created_at", "updated_at")
+VALUES
+  (gen_random_uuid(), '{TENANT_ID}', 'IT & Software', '#3B82F6', 1, NOW(), NOW()),
+  (gen_random_uuid(), '{TENANT_ID}', 'Produktion', '#F59E0B', 2, NOW(), NOW()),
+  (gen_random_uuid(), '{TENANT_ID}', 'Handel', '#10B981', 3, NOW(), NOW()),
+  (gen_random_uuid(), '{TENANT_ID}', 'Dienstleistung', '#8B5CF6', 4, NOW(), NOW()),
+  (gen_random_uuid(), '{TENANT_ID}', 'Gesundheit', '#EF4444', 5, NOW(), NOW()),
+  (gen_random_uuid(), '{TENANT_ID}', 'Finanzen', '#6366F1', 6, NOW(), NOW()),
+  (gen_random_uuid(), '{TENANT_ID}', 'Bildung', '#EC4899', 7, NOW(), NOW()),
+  (gen_random_uuid(), '{TENANT_ID}', 'Oeffentlicher Sektor', '#6B7280', 8, NOW(), NOW())
+ON CONFLICT ("tenant_id", "name") DO NOTHING;
+
+-- --------------------------------------------------------
+-- Default AccountTypes (Kontotypen)
+-- --------------------------------------------------------
+INSERT INTO "app_crm"."account_types" ("id", "tenant_id", "name", "sort_order", "created_at", "updated_at")
+VALUES
+  (gen_random_uuid(), '{TENANT_ID}', 'Interessent', 1, NOW(), NOW()),
+  (gen_random_uuid(), '{TENANT_ID}', 'Endkunde', 2, NOW(), NOW()),
+  (gen_random_uuid(), '{TENANT_ID}', 'Personaldienstleister', 3, NOW(), NOW()),
+  (gen_random_uuid(), '{TENANT_ID}', 'Partner', 4, NOW(), NOW())
+ON CONFLICT ("tenant_id", "name") DO NOTHING;
+
+-- --------------------------------------------------------
+-- Default RelationshipTypes (Beziehungstypen)
+-- --------------------------------------------------------
+INSERT INTO "app_crm"."relationship_types" ("id", "tenant_id", "name", "sort_order", "created_at", "updated_at")
+VALUES
+  (gen_random_uuid(), '{TENANT_ID}', 'Endkunde', 1, NOW(), NOW()),
+  (gen_random_uuid(), '{TENANT_ID}', 'Abrechnungspartner', 2, NOW(), NOW()),
+  (gen_random_uuid(), '{TENANT_ID}', 'Muttergesellschaft', 3, NOW(), NOW()),
+  (gen_random_uuid(), '{TENANT_ID}', 'Tochtergesellschaft', 4, NOW(), NOW())
+ON CONFLICT ("tenant_id", "name") DO NOTHING;

packages/crm-service/src/account-types/account-types.controller.ts

@@ -0,0 +1,100 @@
+import {
+  Controller,
+  Get,
+  Post,
+  Patch,
+  Delete,
+  Body,
+  Param,
+  ParseUUIDPipe,
+  HttpCode,
+  HttpStatus,
+  UseGuards,
+} from '@nestjs/common';
+import {
+  ApiTags,
+  ApiOperation,
+  ApiBearerAuth,
+  ApiParam,
+} from '@nestjs/swagger';
+import { AccountTypesService } from './account-types.service';
+import { CreateAccountTypeDto } from './dto/create-account-type.dto';
+import { UpdateAccountTypeDto } from './dto/update-account-type.dto';
+import { CurrentUser, JwtPayload } from '../common/decorators';
+import { TenantGuard } from '../auth/guards/tenant.guard';
+import { singleResponse } from '../common/dto/pagination.dto';
+
+@ApiTags('Account Types')
+@ApiBearerAuth('access-token')
+@UseGuards(TenantGuard)
+@Controller('account-types')
+export class AccountTypesController {
+  constructor(private readonly accountTypesService: AccountTypesService) {}
+
+  @Post()
+  @HttpCode(HttpStatus.CREATED)
+  @ApiOperation({ summary: 'Kontotyp erstellen' })
+  async create(
+    @CurrentUser() user: JwtPayload,
+    @Body() dto: CreateAccountTypeDto,
+  ) {
+    const accountType = await this.accountTypesService.create(
+      user.tenantId!,
+      dto,
+    );
+    return singleResponse(accountType);
+  }
+
+  @Get()
+  @ApiOperation({ summary: 'Alle Kontotypen auflisten' })
+  async findAll(@CurrentUser() user: JwtPayload) {
+    const accountTypes = await this.accountTypesService.findAll(
+      user.tenantId!,
+    );
+    return { data: accountTypes };
+  }
+
+  @Get(':id')
+  @ApiOperation({ summary: 'Kontotyp abrufen' })
+  @ApiParam({ name: 'id', type: 'string', format: 'uuid' })
+  async findOne(
+    @CurrentUser() user: JwtPayload,
+    @Param('id', ParseUUIDPipe) id: string,
+  ) {
+    const accountType = await this.accountTypesService.findOne(
+      user.tenantId!,
+      id,
+    );
+    return singleResponse(accountType);
+  }
+
+  @Patch(':id')
+  @ApiOperation({ summary: 'Kontotyp aktualisieren' })
+  @ApiParam({ name: 'id', type: 'string', format: 'uuid' })
+  async update(
+    @CurrentUser() user: JwtPayload,
+    @Param('id', ParseUUIDPipe) id: string,
+    @Body() dto: UpdateAccountTypeDto,
+  ) {
+    const accountType = await this.accountTypesService.update(
+      user.tenantId!,
+      id,
+      dto,
+    );
+    return singleResponse(accountType);
+  }
+
+  @Delete(':id')
+  @ApiOperation({ summary: 'Kontotyp loeschen' })
+  @ApiParam({ name: 'id', type: 'string', format: 'uuid' })
+  async remove(
+    @CurrentUser() user: JwtPayload,
+    @Param('id', ParseUUIDPipe) id: string,
+  ) {
+    const accountType = await this.accountTypesService.remove(
+      user.tenantId!,
+      id,
+    );
+    return singleResponse(accountType);
+  }
+}

packages/crm-service/src/account-types/account-types.module.ts

@@ -0,0 +1,10 @@
+import { Module } from '@nestjs/common';
+import { AccountTypesController } from './account-types.controller';
+import { AccountTypesService } from './account-types.service';
+
+@Module({
+  controllers: [AccountTypesController],
+  providers: [AccountTypesService],
+  exports: [AccountTypesService],
+})
+export class AccountTypesModule {}

packages/crm-service/src/account-types/account-types.service.ts

@@ -0,0 +1,92 @@
+import {
+  Injectable,
+  NotFoundException,
+  ConflictException,
+} from '@nestjs/common';
+import { CrmPrismaService } from '../prisma/crm-prisma.service';
+import { CreateAccountTypeDto } from './dto/create-account-type.dto';
+import { UpdateAccountTypeDto } from './dto/update-account-type.dto';
+
+@Injectable()
+export class AccountTypesService {
+  constructor(private readonly prisma: CrmPrismaService) {}
+
+  async create(tenantId: string, dto: CreateAccountTypeDto) {
+    const existing = await this.prisma.accountType.findUnique({
+      where: { tenantId_name: { tenantId, name: dto.name } },
+    });
+    if (existing) {
+      throw new ConflictException(
+        `Kontotyp "${dto.name}" existiert bereits`,
+      );
+    }
+
+    return this.prisma.accountType.create({
+      data: {
+        tenantId,
+        name: dto.name,
+        sortOrder: dto.sortOrder ?? 0,
+      },
+    });
+  }
+
+  async findAll(tenantId: string) {
+    return this.prisma.accountType.findMany({
+      where: { tenantId },
+      orderBy: [{ sortOrder: 'asc' }, { name: 'asc' }],
+      include: {
+        _count: { select: { companies: true } },
+      },
+    });
+  }
+
+  async findOne(tenantId: string, id: string) {
+    const accountType = await this.prisma.accountType.findFirst({
+      where: { id, tenantId },
+      include: {
+        _count: { select: { companies: true } },
+      },
+    });
+
+    if (!accountType) {
+      throw new NotFoundException('Kontotyp nicht gefunden');
+    }
+
+    return accountType;
+  }
+
+  async update(tenantId: string, id: string, dto: UpdateAccountTypeDto) {
+    await this.findOne(tenantId, id);
+
+    if (dto.name) {
+      const existing = await this.prisma.accountType.findFirst({
+        where: { tenantId, name: dto.name, NOT: { id } },
+      });
+      if (existing) {
+        throw new ConflictException(
+          `Kontotyp "${dto.name}" existiert bereits`,
+        );
+      }
+    }
+
+    return this.prisma.accountType.update({
+      where: { id },
+      data: dto,
+      include: {
+        _count: { select: { companies: true } },
+      },
+    });
+  }
+
+  async remove(tenantId: string, id: string) {
+    const accountType = await this.findOne(tenantId, id);
+
+    if (accountType._count.companies > 0) {
+      throw new ConflictException(
+        `Kontotyp kann nicht geloescht werden — ${accountType._count.companies} Unternehmen zugeordnet`,
+      );
+    }
+
+    return this.prisma.accountType.delete({ where: { id } });
+  }
+}

packages/crm-service/src/account-types/dto/create-account-type.dto.ts

@@ -0,0 +1,15 @@
+import { IsString, IsOptional, IsInt, MaxLength, Min } from 'class-validator';
+import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
+
+export class CreateAccountTypeDto {
+  @ApiProperty({ maxLength: 100, description: 'Name des Kontotyps' })
+  @IsString()
+  @MaxLength(100)
+  name!: string;
+
+  @ApiPropertyOptional({ default: 0, description: 'Sortierreihenfolge' })
+  @IsOptional()
+  @IsInt()
+  @Min(0)
+  sortOrder?: number;
+}

packages/crm-service/src/account-types/dto/update-account-type.dto.ts

@@ -0,0 +1,16 @@
+import { IsString, IsOptional, IsInt, MaxLength, Min } from 'class-validator';
+import { ApiPropertyOptional } from '@nestjs/swagger';
+
+export class UpdateAccountTypeDto {
+  @ApiPropertyOptional({ maxLength: 100 })
+  @IsOptional()
+  @IsString()
+  @MaxLength(100)
+  name?: string;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsInt()
+  @Min(0)
+  sortOrder?: number;
+}

packages/crm-service/src/activities/activities.service.ts

@@ -1,4 +1,8 @@
-import { Injectable, NotFoundException } from '@nestjs/common';
+import {
+  Injectable,
+  NotFoundException,
+  BadRequestException,
+} from '@nestjs/common';
 import { CrmPrismaService } from '../prisma/crm-prisma.service';
 import { CreateActivityDto } from './dto/create-activity.dto';
 import { UpdateActivityDto } from './dto/update-activity.dto';
@@ -10,18 +14,38 @@ export class ActivitiesService {
   constructor(private readonly prisma: CrmPrismaService) {}
 
   async create(tenantId: string, userId: string, dto: CreateActivityDto) {
-    // Pruefen ob der Kontakt existiert und zum Tenant gehoert
+    // Mindestens contactId oder companyId muss gesetzt sein
-    const contact = await this.prisma.contact.findFirst({
+    if (!dto.contactId && !dto.companyId) {
-      where: { id: dto.contactId, tenantId },
+      throw new BadRequestException(
-    });
+        'Mindestens contactId oder companyId muss angegeben werden',
-    if (!contact) {
+      );
-      throw new NotFoundException('Kontakt nicht gefunden');
+    }
+
+    // Kontakt validieren (falls gesetzt)
+    if (dto.contactId) {
+      const contact = await this.prisma.contact.findFirst({
+        where: { id: dto.contactId, tenantId },
+      });
+      if (!contact) {
+        throw new NotFoundException('Kontakt nicht gefunden');
+      }
+    }
+
+    // Unternehmen validieren (falls gesetzt)
+    if (dto.companyId) {
+      const company = await this.prisma.company.findFirst({
+        where: { id: dto.companyId, tenantId },
+      });
+      if (!company) {
+        throw new NotFoundException('Unternehmen nicht gefunden');
+      }
     }
 
     return this.prisma.activity.create({
       data: {
         tenantId,
         contactId: dto.contactId,
+        companyId: dto.companyId,
         type: dto.type,
         subject: dto.subject,
         description: dto.description,
@@ -29,7 +53,14 @@ export class ActivitiesService {
         completedAt: dto.completedAt ? new Date(dto.completedAt) : undefined,
         createdBy: userId,
       },
-      include: { contact: true },
+      include: {
+        contact: {
+          select: { id: true, firstName: true, lastName: true, companyName: true },
+        },
+        company: {
+          select: { id: true, name: true },
+        },
+      },
     });
   }
 
@@ -39,9 +70,27 @@ export class ActivitiesService {
 
     const where: Prisma.ActivityWhereInput = { tenantId };
 
-    if (query.contactId) {
+    // Aggregierter Company-Feed: direkte + verknuepfte Kontakt-Aktivitaeten
+    if (query.companyId && query.includeContacts) {
+      const contactIds = await this.prisma.contact
+        .findMany({
+          where: { tenantId, companyId: query.companyId },
+          select: { id: true },
+        })
+        .then((contacts) => contacts.map((c) => c.id));
+
+      where.OR = [
+        { companyId: query.companyId },
+        ...(contactIds.length > 0
+          ? [{ contactId: { in: contactIds } }]
+          : []),
+      ];
+    } else if (query.companyId) {
+      where.companyId = query.companyId;
+    } else if (query.contactId) {
       where.contactId = query.contactId;
     }
+
     if (query.type) {
       where.type = query.type;
     }
@@ -57,7 +106,14 @@ export class ActivitiesService {
         skip: (page - 1) * pageSize,
         take: pageSize,
         orderBy: { [sortField]: query.order ?? 'desc' },
-        include: { contact: { select: { id: true, firstName: true, lastName: true, companyName: true } } },
+        include: {
+          contact: {
+            select: { id: true, firstName: true, lastName: true, companyName: true },
+          },
+          company: {
+            select: { id: true, name: true },
+          },
+        },
       }),
       this.prisma.activity.count({ where }),
     ]);
@@ -68,7 +124,10 @@ export class ActivitiesService {
   async findOne(tenantId: string, id: string) {
     const activity = await this.prisma.activity.findFirst({
       where: { id, tenantId },
-      include: { contact: true },
+      include: {
+        contact: true,
+        company: { select: { id: true, name: true } },
+      },
     });
 
     if (!activity) {
@@ -94,7 +153,14 @@ export class ActivitiesService {
         completedAt: dto.completedAt ? new Date(dto.completedAt) : undefined,
         updatedBy: userId,
       },
-      include: { contact: true },
+      include: {
+        contact: {
+          select: { id: true, firstName: true, lastName: true, companyName: true },
+        },
+        company: {
+          select: { id: true, name: true },
+        },
+      },
     });
   }
 

packages/crm-service/src/activities/dto/create-activity.dto.ts

@@ -5,6 +5,7 @@ import {
   IsUUID,
   IsDateString,
   MaxLength,
+  ValidateIf,
 } from 'class-validator';
 import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
 
@@ -17,9 +18,17 @@ export enum ActivityType {
 }
 
 export class CreateActivityDto {
-  @ApiProperty({ format: 'uuid' })
+  @ApiPropertyOptional({ format: 'uuid', description: 'Kontakt-ID (optional wenn companyId gesetzt)' })
+  @IsOptional()
+  @ValidateIf((o) => !o.companyId)
   @IsUUID()
-  contactId!: string;
+  contactId?: string;
+
+  @ApiPropertyOptional({ format: 'uuid', description: 'Unternehmens-ID (optional wenn contactId gesetzt)' })
+  @IsOptional()
+  @ValidateIf((o) => !o.contactId)
+  @IsUUID()
+  companyId?: string;
 
   @ApiProperty({ enum: ActivityType })
   @IsEnum(ActivityType)

packages/crm-service/src/activities/dto/query-activities.dto.ts

@@ -1,5 +1,6 @@
-import { IsString, IsOptional, IsEnum, IsUUID } from 'class-validator';
+import { IsString, IsOptional, IsEnum, IsUUID, IsBoolean } from 'class-validator';
 import { ApiPropertyOptional } from '@nestjs/swagger';
+import { Transform } from 'class-transformer';
 import { PaginationDto } from '../../common/dto/pagination.dto';
 import { ActivityType } from './create-activity.dto';
 
@@ -9,6 +10,20 @@ export class QueryActivitiesDto extends PaginationDto {
   @IsUUID()
   contactId?: string;
 
+  @ApiPropertyOptional({ format: 'uuid', description: 'Filter nach Unternehmen' })
+  @IsOptional()
+  @IsUUID()
+  companyId?: string;
+
+  @ApiPropertyOptional({
+    description: 'Kontakt-Aktivitaeten inkludieren (nur bei companyId)',
+    default: false,
+  })
+  @IsOptional()
+  @Transform(({ value }) => value === 'true' || value === true)
+  @IsBoolean()
+  includeContacts?: boolean;
+
   @ApiPropertyOptional({ enum: ActivityType })
   @IsOptional()
   @IsEnum(ActivityType)

packages/crm-service/src/app.module.ts

@@ -15,6 +15,10 @@ import { PipelinesModule } from './pipelines/pipelines.module';
 import { DealsModule } from './deals/deals.module';
 import { CompaniesModule } from './companies/companies.module';
 import { LexwareModule } from './lexware/lexware.module';
+import { IndustriesModule } from './industries/industries.module';
+import { AccountTypesModule } from './account-types/account-types.module';
+import { RelationshipTypesModule } from './relationship-types/relationship-types.module';
+import { CompanyRelationshipsModule } from './company-relationships/company-relationships.module';
 
 @Module({
   imports: [
@@ -33,6 +37,10 @@ import { LexwareModule } from './lexware/lexware.module';
     DealsModule,
     CompaniesModule,
     LexwareModule,
+    IndustriesModule,
+    AccountTypesModule,
+    RelationshipTypesModule,
+    CompanyRelationshipsModule,
   ],
   providers: [
     {

packages/crm-service/src/companies/companies.service.ts

@@ -22,6 +22,10 @@ export class CompaniesService {
         createdBy: userId,
         name: dto.name,
         industry: dto.industry,
+        industryId: dto.industryId,
+        accountTypeId: dto.accountTypeId,
+        ownerId: dto.ownerId,
+        ownerName: dto.ownerName,
         email: dto.email,
         phone: dto.phone,
         website: dto.website,
@@ -35,6 +39,8 @@ export class CompaniesService {
         isActive: dto.isActive ?? true,
       },
       include: {
+        industryRef: true,
+        accountType: true,
         _count: { select: { contacts: true, deals: true } },
       },
     });
@@ -77,6 +83,8 @@ export class CompaniesService {
         take: pageSize,
         orderBy: { [sortField]: query.order ?? 'desc' },
         include: {
+          industryRef: true,
+          accountType: true,
           _count: { select: { contacts: true, deals: true } },
         },
       }),
@@ -90,6 +98,8 @@ export class CompaniesService {
     const company = await this.prisma.company.findFirst({
       where: { id, tenantId },
       include: {
+        industryRef: true,
+        accountType: true,
         contacts: {
           where: { isActive: true },
           orderBy: { createdAt: 'desc' },
@@ -112,8 +122,34 @@ export class CompaniesService {
             stage: { select: { id: true, name: true, color: true } },
           },
         },
+        relationships: {
+          include: {
+            relatedCompany: {
+              select: { id: true, name: true, industry: true, city: true },
+            },
+            relationshipType: {
+              select: { id: true, name: true },
+            },
+          },
+          orderBy: { createdAt: 'desc' },
+        },
+        relatedRelationships: {
+          include: {
+            company: {
+              select: { id: true, name: true, industry: true, city: true },
+            },
+            relationshipType: {
+              select: { id: true, name: true },
+            },
+          },
+          orderBy: { createdAt: 'desc' },
+        },
+        contracts: {
+          orderBy: { createdAt: 'desc' },
+          take: 10,
+        },
         _count: {
-          select: { contacts: true, deals: true, lexwareVouchers: true },
+          select: { contacts: true, deals: true, lexwareVouchers: true, contracts: true },
         },
       },
     });
@@ -140,6 +176,8 @@ export class CompaniesService {
         updatedBy: userId,
       },
       include: {
+        industryRef: true,
+        accountType: true,
         _count: { select: { contacts: true, deals: true } },
       },
     });

packages/crm-service/src/companies/dto/create-company.dto.ts

@@ -4,6 +4,7 @@ import {
   IsBoolean,
   IsEmail,
   IsUrl,
+  IsUUID,
   IsArray,
   MaxLength,
 } from 'class-validator';
@@ -15,12 +16,33 @@ export class CreateCompanyDto {
   @MaxLength(200)
   name!: string;
 
-  @ApiPropertyOptional({ maxLength: 100 })
+  @ApiPropertyOptional({ maxLength: 100, description: 'Freitext-Branche (Legacy)' })
   @IsOptional()
   @IsString()
   @MaxLength(100)
   industry?: string;
 
+  @ApiPropertyOptional({ format: 'uuid', description: 'Branchen-ID' })
+  @IsOptional()
+  @IsUUID()
+  industryId?: string;
+
+  @ApiPropertyOptional({ format: 'uuid', description: 'Kontotyp-ID' })
+  @IsOptional()
+  @IsUUID()
+  accountTypeId?: string;
+
+  @ApiPropertyOptional({ format: 'uuid', description: 'Zustaendiger User (Owner-ID)' })
+  @IsOptional()
+  @IsUUID()
+  ownerId?: string;
+
+  @ApiPropertyOptional({ maxLength: 200, description: 'Name des zustaendigen Users' })
+  @IsOptional()
+  @IsString()
+  @MaxLength(200)
+  ownerName?: string;
+
   @ApiPropertyOptional({ maxLength: 255 })
   @IsOptional()
   @IsEmail()

packages/crm-service/src/companies/dto/update-company.dto.ts

@@ -4,6 +4,7 @@ import {
   IsBoolean,
   IsEmail,
   IsUrl,
+  IsUUID,
   IsArray,
   MaxLength,
 } from 'class-validator';
@@ -22,6 +23,27 @@ export class UpdateCompanyDto {
   @MaxLength(100)
   industry?: string;
 
+  @ApiPropertyOptional({ format: 'uuid', description: 'Branchen-ID' })
+  @IsOptional()
+  @IsUUID()
+  industryId?: string;
+
+  @ApiPropertyOptional({ format: 'uuid', description: 'Kontotyp-ID' })
+  @IsOptional()
+  @IsUUID()
+  accountTypeId?: string;
+
+  @ApiPropertyOptional({ format: 'uuid', description: 'Zustaendiger User (Owner-ID)' })
+  @IsOptional()
+  @IsUUID()
+  ownerId?: string;
+
+  @ApiPropertyOptional({ maxLength: 200, description: 'Name des zustaendigen Users' })
+  @IsOptional()
+  @IsString()
+  @MaxLength(200)
+  ownerName?: string;
+
   @ApiPropertyOptional({ maxLength: 255 })
   @IsOptional()
   @IsEmail()

packages/crm-service/src/company-relationships/company-relationships.controller.ts

@@ -0,0 +1,82 @@
+import {
+  Controller,
+  Get,
+  Post,
+  Delete,
+  Body,
+  Param,
+  ParseUUIDPipe,
+  HttpCode,
+  HttpStatus,
+  UseGuards,
+} from '@nestjs/common';
+import {
+  ApiTags,
+  ApiOperation,
+  ApiBearerAuth,
+  ApiParam,
+} from '@nestjs/swagger';
+import { CompanyRelationshipsService } from './company-relationships.service';
+import { CreateRelationshipDto } from './dto/create-relationship.dto';
+import { CurrentUser, JwtPayload } from '../common/decorators';
+import { TenantGuard } from '../auth/guards/tenant.guard';
+import { singleResponse } from '../common/dto/pagination.dto';
+
+@ApiTags('Company Relationships')
+@ApiBearerAuth('access-token')
+@UseGuards(TenantGuard)
+@Controller('companies/:companyId/relationships')
+export class CompanyRelationshipsController {
+  constructor(
+    private readonly companyRelationshipsService: CompanyRelationshipsService,
+  ) {}
+
+  @Post()
+  @HttpCode(HttpStatus.CREATED)
+  @ApiOperation({ summary: 'Unternehmensbeziehung erstellen' })
+  @ApiParam({ name: 'companyId', type: 'string', format: 'uuid' })
+  async create(
+    @CurrentUser() user: JwtPayload,
+    @Param('companyId', ParseUUIDPipe) companyId: string,
+    @Body() dto: CreateRelationshipDto,
+  ) {
+    const rel = await this.companyRelationshipsService.create(
+      user.tenantId!,
+      companyId,
+      user.sub,
+      dto,
+    );
+    return singleResponse(rel);
+  }
+
+  @Get()
+  @ApiOperation({ summary: 'Beziehungen eines Unternehmens auflisten' })
+  @ApiParam({ name: 'companyId', type: 'string', format: 'uuid' })
+  async findAll(
+    @CurrentUser() user: JwtPayload,
+    @Param('companyId', ParseUUIDPipe) companyId: string,
+  ) {
+    const relationships = await this.companyRelationshipsService.findByCompany(
+      user.tenantId!,
+      companyId,
+    );
+    return { data: relationships };
+  }
+
+  @Delete(':relationshipId')
+  @ApiOperation({ summary: 'Unternehmensbeziehung loeschen' })
+  @ApiParam({ name: 'companyId', type: 'string', format: 'uuid' })
+  @ApiParam({ name: 'relationshipId', type: 'string', format: 'uuid' })
+  async remove(
+    @CurrentUser() user: JwtPayload,
+    @Param('companyId', ParseUUIDPipe) companyId: string,
+    @Param('relationshipId', ParseUUIDPipe) relationshipId: string,
+  ) {
+    const rel = await this.companyRelationshipsService.remove(
+      user.tenantId!,
+      companyId,
+      relationshipId,
+    );
+    return singleResponse(rel);
+  }
+}

packages/crm-service/src/company-relationships/company-relationships.module.ts

@@ -0,0 +1,10 @@
+import { Module } from '@nestjs/common';
+import { CompanyRelationshipsController } from './company-relationships.controller';
+import { CompanyRelationshipsService } from './company-relationships.service';
+
+@Module({
+  controllers: [CompanyRelationshipsController],
+  providers: [CompanyRelationshipsService],
+  exports: [CompanyRelationshipsService],
+})
+export class CompanyRelationshipsModule {}

packages/crm-service/src/company-relationships/company-relationships.service.ts

@@ -0,0 +1,154 @@
+import {
+  Injectable,
+  NotFoundException,
+  ConflictException,
+  BadRequestException,
+} from '@nestjs/common';
+import { CrmPrismaService } from '../prisma/crm-prisma.service';
+import { CreateRelationshipDto } from './dto/create-relationship.dto';
+
+@Injectable()
+export class CompanyRelationshipsService {
+  constructor(private readonly prisma: CrmPrismaService) {}
+
+  async create(
+    tenantId: string,
+    companyId: string,
+    userId: string,
+    dto: CreateRelationshipDto,
+  ) {
+    // Selbst-Referenz verhindern
+    if (companyId === dto.relatedCompanyId) {
+      throw new BadRequestException(
+        'Ein Unternehmen kann keine Beziehung zu sich selbst haben',
+      );
+    }
+
+    // Company validieren
+    const company = await this.prisma.company.findFirst({
+      where: { id: companyId, tenantId },
+    });
+    if (!company) {
+      throw new NotFoundException('Unternehmen nicht gefunden');
+    }
+
+    // Related Company validieren
+    const relatedCompany = await this.prisma.company.findFirst({
+      where: { id: dto.relatedCompanyId, tenantId },
+    });
+    if (!relatedCompany) {
+      throw new NotFoundException('Verknuepftes Unternehmen nicht gefunden');
+    }
+
+    // RelationshipType validieren
+    const relType = await this.prisma.relationshipType.findFirst({
+      where: { id: dto.relationshipTypeId, tenantId },
+    });
+    if (!relType) {
+      throw new NotFoundException('Beziehungstyp nicht gefunden');
+    }
+
+    // Duplikat pruefen
+    const existing = await this.prisma.companyRelationship.findUnique({
+      where: {
+        companyId_relatedCompanyId_relationshipTypeId: {
+          companyId,
+          relatedCompanyId: dto.relatedCompanyId,
+          relationshipTypeId: dto.relationshipTypeId,
+        },
+      },
+    });
+    if (existing) {
+      throw new ConflictException('Diese Beziehung existiert bereits');
+    }
+
+    return this.prisma.companyRelationship.create({
+      data: {
+        tenantId,
+        companyId,
+        relatedCompanyId: dto.relatedCompanyId,
+        relationshipTypeId: dto.relationshipTypeId,
+        notes: dto.notes,
+        createdBy: userId,
+      },
+      include: {
+        relatedCompany: {
+          select: { id: true, name: true, industry: true, city: true },
+        },
+        relationshipType: {
+          select: { id: true, name: true },
+        },
+      },
+    });
+  }
+
+  async findByCompany(tenantId: string, companyId: string) {
+    // Beziehungen in beide Richtungen laden
+    const [outgoing, incoming] = await Promise.all([
+      this.prisma.companyRelationship.findMany({
+        where: { tenantId, companyId },
+        include: {
+          relatedCompany: {
+            select: { id: true, name: true, industry: true, city: true },
+          },
+          relationshipType: {
+            select: { id: true, name: true },
+          },
+        },
+        orderBy: { createdAt: 'desc' },
+      }),
+      this.prisma.companyRelationship.findMany({
+        where: { tenantId, relatedCompanyId: companyId },
+        include: {
+          company: {
+            select: { id: true, name: true, industry: true, city: true },
+          },
+          relationshipType: {
+            select: { id: true, name: true },
+          },
+        },
+        orderBy: { createdAt: 'desc' },
+      }),
+    ]);
+
+    // Eingehende Beziehungen umformatieren (damit relatedCompany immer die "andere" Seite ist)
+    const normalizedIncoming = incoming.map((rel) => ({
+      id: rel.id,
+      tenantId: rel.tenantId,
+      companyId: rel.relatedCompanyId,
+      relatedCompanyId: rel.companyId,
+      relationshipTypeId: rel.relationshipTypeId,
+      notes: rel.notes,
+      createdBy: rel.createdBy,
+      createdAt: rel.createdAt,
+      relatedCompany: rel.company,
+      relationshipType: rel.relationshipType,
+      direction: 'incoming' as const,
+    }));
+
+    const normalizedOutgoing = outgoing.map((rel) => ({
+      ...rel,
+      direction: 'outgoing' as const,
+    }));
+
+    return [...normalizedOutgoing, ...normalizedIncoming];
+  }
+
+  async remove(tenantId: string, companyId: string, relationshipId: string) {
+    const rel = await this.prisma.companyRelationship.findFirst({
+      where: {
+        id: relationshipId,
+        tenantId,
+        OR: [{ companyId }, { relatedCompanyId: companyId }],
+      },
+    });
+
+    if (!rel) {
+      throw new NotFoundException('Beziehung nicht gefunden');
+    }
+
+    return this.prisma.companyRelationship.delete({
+      where: { id: relationshipId },
+    });
+  }
+}

packages/crm-service/src/company-relationships/dto/create-relationship.dto.ts

@@ -0,0 +1,17 @@
+import { IsString, IsOptional, IsUUID } from 'class-validator';
+import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
+
+export class CreateRelationshipDto {
+  @ApiProperty({ format: 'uuid', description: 'ID des verknuepften Unternehmens' })
+  @IsUUID()
+  relatedCompanyId!: string;
+
+  @ApiProperty({ format: 'uuid', description: 'ID des Beziehungstyps' })
+  @IsUUID()
+  relationshipTypeId!: string;
+
+  @ApiPropertyOptional({ description: 'Notizen zur Beziehung' })
+  @IsOptional()
+  @IsString()
+  notes?: string;
+}

packages/crm-service/src/industries/dto/create-industry.dto.ts

@@ -0,0 +1,35 @@
+import {
+  IsString,
+  IsOptional,
+  IsInt,
+  MaxLength,
+  Matches,
+  Min,
+} from 'class-validator';
+import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
+
+export class CreateIndustryDto {
+  @ApiProperty({ maxLength: 100, description: 'Name der Branche' })
+  @IsString()
+  @MaxLength(100)
+  name!: string;
+
+  @ApiPropertyOptional({
+    maxLength: 7,
+    default: '#6B7280',
+    description: 'Hex-Farbcode (z.B. #3B82F6)',
+  })
+  @IsOptional()
+  @IsString()
+  @MaxLength(7)
+  @Matches(/^#[0-9A-Fa-f]{6}$/, {
+    message: 'color muss ein gueltiger Hex-Farbcode sein (z.B. #3B82F6)',
+  })
+  color?: string;
+
+  @ApiPropertyOptional({ default: 0, description: 'Sortierreihenfolge' })
+  @IsOptional()
+  @IsInt()
+  @Min(0)
+  sortOrder?: number;
+}

packages/crm-service/src/industries/dto/update-industry.dto.ts

@@ -0,0 +1,32 @@
+import {
+  IsString,
+  IsOptional,
+  IsInt,
+  MaxLength,
+  Matches,
+  Min,
+} from 'class-validator';
+import { ApiPropertyOptional } from '@nestjs/swagger';
+
+export class UpdateIndustryDto {
+  @ApiPropertyOptional({ maxLength: 100 })
+  @IsOptional()
+  @IsString()
+  @MaxLength(100)
+  name?: string;
+
+  @ApiPropertyOptional({ maxLength: 7 })
+  @IsOptional()
+  @IsString()
+  @MaxLength(7)
+  @Matches(/^#[0-9A-Fa-f]{6}$/, {
+    message: 'color muss ein gueltiger Hex-Farbcode sein (z.B. #3B82F6)',
+  })
+  color?: string;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsInt()
+  @Min(0)
+  sortOrder?: number;
+}

packages/crm-service/src/industries/industries.controller.ts

@@ -0,0 +1,98 @@
+import {
+  Controller,
+  Get,
+  Post,
+  Patch,
+  Delete,
+  Body,
+  Param,
+  ParseUUIDPipe,
+  HttpCode,
+  HttpStatus,
+  UseGuards,
+} from '@nestjs/common';
+import {
+  ApiTags,
+  ApiOperation,
+  ApiBearerAuth,
+  ApiParam,
+} from '@nestjs/swagger';
+import { IndustriesService } from './industries.service';
+import { CreateIndustryDto } from './dto/create-industry.dto';
+import { UpdateIndustryDto } from './dto/update-industry.dto';
+import { CurrentUser, JwtPayload } from '../common/decorators';
+import { TenantGuard } from '../auth/guards/tenant.guard';
+import { singleResponse } from '../common/dto/pagination.dto';
+
+@ApiTags('Industries')
+@ApiBearerAuth('access-token')
+@UseGuards(TenantGuard)
+@Controller('industries')
+export class IndustriesController {
+  constructor(private readonly industriesService: IndustriesService) {}
+
+  @Post()
+  @HttpCode(HttpStatus.CREATED)
+  @ApiOperation({ summary: 'Branche erstellen' })
+  async create(
+    @CurrentUser() user: JwtPayload,
+    @Body() dto: CreateIndustryDto,
+  ) {
+    const industry = await this.industriesService.create(
+      user.tenantId!,
+      dto,
+    );
+    return singleResponse(industry);
+  }
+
+  @Get()
+  @ApiOperation({ summary: 'Alle Branchen auflisten' })
+  async findAll(@CurrentUser() user: JwtPayload) {
+    const industries = await this.industriesService.findAll(user.tenantId!);
+    return { data: industries };
+  }
+
+  @Get(':id')
+  @ApiOperation({ summary: 'Branche abrufen' })
+  @ApiParam({ name: 'id', type: 'string', format: 'uuid' })
+  async findOne(
+    @CurrentUser() user: JwtPayload,
+    @Param('id', ParseUUIDPipe) id: string,
+  ) {
+    const industry = await this.industriesService.findOne(
+      user.tenantId!,
+      id,
+    );
+    return singleResponse(industry);
+  }
+
+  @Patch(':id')
+  @ApiOperation({ summary: 'Branche aktualisieren' })
+  @ApiParam({ name: 'id', type: 'string', format: 'uuid' })
+  async update(
+    @CurrentUser() user: JwtPayload,
+    @Param('id', ParseUUIDPipe) id: string,
+    @Body() dto: UpdateIndustryDto,
+  ) {
+    const industry = await this.industriesService.update(
+      user.tenantId!,
+      id,
+      dto,
+    );
+    return singleResponse(industry);
+  }
+
+  @Delete(':id')
+  @ApiOperation({ summary: 'Branche loeschen' })
+  @ApiParam({ name: 'id', type: 'string', format: 'uuid' })
+  async remove(
+    @CurrentUser() user: JwtPayload,
+    @Param('id', ParseUUIDPipe) id: string,
+  ) {
+    const industry = await this.industriesService.remove(
+      user.tenantId!,
+      id,
+    );
+    return singleResponse(industry);
+  }
+}

packages/crm-service/src/industries/industries.module.ts

@@ -0,0 +1,10 @@
+import { Module } from '@nestjs/common';
+import { IndustriesController } from './industries.controller';
+import { IndustriesService } from './industries.service';
+
+@Module({
+  controllers: [IndustriesController],
+  providers: [IndustriesService],
+  exports: [IndustriesService],
+})
+export class IndustriesModule {}

packages/crm-service/src/industries/industries.service.ts

@@ -0,0 +1,96 @@
+import {
+  Injectable,
+  NotFoundException,
+  ConflictException,
+} from '@nestjs/common';
+import { CrmPrismaService } from '../prisma/crm-prisma.service';
+import { CreateIndustryDto } from './dto/create-industry.dto';
+import { UpdateIndustryDto } from './dto/update-industry.dto';
+
+@Injectable()
+export class IndustriesService {
+  constructor(private readonly prisma: CrmPrismaService) {}
+
+  async create(tenantId: string, dto: CreateIndustryDto) {
+    // Pruefen ob Name bereits existiert
+    const existing = await this.prisma.industry.findUnique({
+      where: { tenantId_name: { tenantId, name: dto.name } },
+    });
+    if (existing) {
+      throw new ConflictException(
+        `Branche "${dto.name}" existiert bereits`,
+      );
+    }
+
+    return this.prisma.industry.create({
+      data: {
+        tenantId,
+        name: dto.name,
+        color: dto.color ?? '#6B7280',
+        sortOrder: dto.sortOrder ?? 0,
+      },
+    });
+  }
+
+  async findAll(tenantId: string) {
+    return this.prisma.industry.findMany({
+      where: { tenantId },
+      orderBy: [{ sortOrder: 'asc' }, { name: 'asc' }],
+      include: {
+        _count: { select: { companies: true } },
+      },
+    });
+  }
+
+  async findOne(tenantId: string, id: string) {
+    const industry = await this.prisma.industry.findFirst({
+      where: { id, tenantId },
+      include: {
+        _count: { select: { companies: true } },
+      },
+    });
+
+    if (!industry) {
+      throw new NotFoundException('Branche nicht gefunden');
+    }
+
+    return industry;
+  }
+
+  async update(tenantId: string, id: string, dto: UpdateIndustryDto) {
+    await this.findOne(tenantId, id);
+
+    // Name-Uniqueness pruefen falls Name geaendert wird
+    if (dto.name) {
+      const existing = await this.prisma.industry.findFirst({
+        where: { tenantId, name: dto.name, NOT: { id } },
+      });
+      if (existing) {
+        throw new ConflictException(
+          `Branche "${dto.name}" existiert bereits`,
+        );
+      }
+    }
+
+    return this.prisma.industry.update({
+      where: { id },
+      data: dto,
+      include: {
+        _count: { select: { companies: true } },
+      },
+    });
+  }
+
+  async remove(tenantId: string, id: string) {
+    const industry = await this.findOne(tenantId, id);
+
+    // Pruefen ob noch Unternehmen zugeordnet sind
+    if (industry._count.companies > 0) {
+      throw new ConflictException(
+        `Branche kann nicht geloescht werden — ${industry._count.companies} Unternehmen zugeordnet`,
+      );
+    }
+
+    return this.prisma.industry.delete({ where: { id } });
+  }
+}

packages/crm-service/src/relationship-types/dto/create-relationship-type.dto.ts

@@ -0,0 +1,15 @@
+import { IsString, IsOptional, IsInt, MaxLength, Min } from 'class-validator';
+import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
+
+export class CreateRelationshipTypeDto {
+  @ApiProperty({ maxLength: 100, description: 'Name des Beziehungstyps' })
+  @IsString()
+  @MaxLength(100)
+  name!: string;
+
+  @ApiPropertyOptional({ default: 0, description: 'Sortierreihenfolge' })
+  @IsOptional()
+  @IsInt()
+  @Min(0)
+  sortOrder?: number;
+}

packages/crm-service/src/relationship-types/dto/update-relationship-type.dto.ts

@@ -0,0 +1,16 @@
+import { IsString, IsOptional, IsInt, MaxLength, Min } from 'class-validator';
+import { ApiPropertyOptional } from '@nestjs/swagger';
+
+export class UpdateRelationshipTypeDto {
+  @ApiPropertyOptional({ maxLength: 100 })
+  @IsOptional()
+  @IsString()
+  @MaxLength(100)
+  name?: string;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsInt()
+  @Min(0)
+  sortOrder?: number;
+}

packages/crm-service/src/relationship-types/relationship-types.controller.ts

@@ -0,0 +1,102 @@
+import {
+  Controller,
+  Get,
+  Post,
+  Patch,
+  Delete,
+  Body,
+  Param,
+  ParseUUIDPipe,
+  HttpCode,
+  HttpStatus,
+  UseGuards,
+} from '@nestjs/common';
+import {
+  ApiTags,
+  ApiOperation,
+  ApiBearerAuth,
+  ApiParam,
+} from '@nestjs/swagger';
+import { RelationshipTypesService } from './relationship-types.service';
+import { CreateRelationshipTypeDto } from './dto/create-relationship-type.dto';
+import { UpdateRelationshipTypeDto } from './dto/update-relationship-type.dto';
+import { CurrentUser, JwtPayload } from '../common/decorators';
+import { TenantGuard } from '../auth/guards/tenant.guard';
+import { singleResponse } from '../common/dto/pagination.dto';
+
+@ApiTags('Relationship Types')
+@ApiBearerAuth('access-token')
+@UseGuards(TenantGuard)
+@Controller('relationship-types')
+export class RelationshipTypesController {
+  constructor(
+    private readonly relationshipTypesService: RelationshipTypesService,
+  ) {}
+
+  @Post()
+  @HttpCode(HttpStatus.CREATED)
+  @ApiOperation({ summary: 'Beziehungstyp erstellen' })
+  async create(
+    @CurrentUser() user: JwtPayload,
+    @Body() dto: CreateRelationshipTypeDto,
+  ) {
+    const relType = await this.relationshipTypesService.create(
+      user.tenantId!,
+      dto,
+    );
+    return singleResponse(relType);
+  }
+
+  @Get()
+  @ApiOperation({ summary: 'Alle Beziehungstypen auflisten' })
+  async findAll(@CurrentUser() user: JwtPayload) {
+    const relTypes = await this.relationshipTypesService.findAll(
+      user.tenantId!,
+    );
+    return { data: relTypes };
+  }
+
+  @Get(':id')
+  @ApiOperation({ summary: 'Beziehungstyp abrufen' })
+  @ApiParam({ name: 'id', type: 'string', format: 'uuid' })
+  async findOne(
+    @CurrentUser() user: JwtPayload,
+    @Param('id', ParseUUIDPipe) id: string,
+  ) {
+    const relType = await this.relationshipTypesService.findOne(
+      user.tenantId!,
+      id,
+    );
+    return singleResponse(relType);
+  }
+
+  @Patch(':id')
+  @ApiOperation({ summary: 'Beziehungstyp aktualisieren' })
+  @ApiParam({ name: 'id', type: 'string', format: 'uuid' })
+  async update(
+    @CurrentUser() user: JwtPayload,
+    @Param('id', ParseUUIDPipe) id: string,
+    @Body() dto: UpdateRelationshipTypeDto,
+  ) {
+    const relType = await this.relationshipTypesService.update(
+      user.tenantId!,
+      id,
+      dto,
+    );
+    return singleResponse(relType);
+  }
+
+  @Delete(':id')
+  @ApiOperation({ summary: 'Beziehungstyp loeschen' })
+  @ApiParam({ name: 'id', type: 'string', format: 'uuid' })
+  async remove(
+    @CurrentUser() user: JwtPayload,
+    @Param('id', ParseUUIDPipe) id: string,
+  ) {
+    const relType = await this.relationshipTypesService.remove(
+      user.tenantId!,
+      id,
+    );
+    return singleResponse(relType);
+  }
+}

packages/crm-service/src/relationship-types/relationship-types.module.ts

@@ -0,0 +1,10 @@
+import { Module } from '@nestjs/common';
+import { RelationshipTypesController } from './relationship-types.controller';
+import { RelationshipTypesService } from './relationship-types.service';
+
+@Module({
+  controllers: [RelationshipTypesController],
+  providers: [RelationshipTypesService],
+  exports: [RelationshipTypesService],
+})
+export class RelationshipTypesModule {}

packages/crm-service/src/relationship-types/relationship-types.service.ts

@@ -0,0 +1,92 @@
+import {
+  Injectable,
+  NotFoundException,
+  ConflictException,
+} from '@nestjs/common';
+import { CrmPrismaService } from '../prisma/crm-prisma.service';
+import { CreateRelationshipTypeDto } from './dto/create-relationship-type.dto';
+import { UpdateRelationshipTypeDto } from './dto/update-relationship-type.dto';
+
+@Injectable()
+export class RelationshipTypesService {
+  constructor(private readonly prisma: CrmPrismaService) {}
+
+  async create(tenantId: string, dto: CreateRelationshipTypeDto) {
+    const existing = await this.prisma.relationshipType.findUnique({
+      where: { tenantId_name: { tenantId, name: dto.name } },
+    });
+    if (existing) {
+      throw new ConflictException(
+        `Beziehungstyp "${dto.name}" existiert bereits`,
+      );
+    }
+
+    return this.prisma.relationshipType.create({
+      data: {
+        tenantId,
+        name: dto.name,
+        sortOrder: dto.sortOrder ?? 0,
+      },
+    });
+  }
+
+  async findAll(tenantId: string) {
+    return this.prisma.relationshipType.findMany({
+      where: { tenantId },
+      orderBy: [{ sortOrder: 'asc' }, { name: 'asc' }],
+      include: {
+        _count: { select: { relationships: true } },
+      },
+    });
+  }
+
+  async findOne(tenantId: string, id: string) {
+    const relType = await this.prisma.relationshipType.findFirst({
+      where: { id, tenantId },
+      include: {
+        _count: { select: { relationships: true } },
+      },
+    });
+
+    if (!relType) {
+      throw new NotFoundException('Beziehungstyp nicht gefunden');
+    }
+
+    return relType;
+  }
+
+  async update(tenantId: string, id: string, dto: UpdateRelationshipTypeDto) {
+    await this.findOne(tenantId, id);
+
+    if (dto.name) {
+      const existing = await this.prisma.relationshipType.findFirst({
+        where: { tenantId, name: dto.name, NOT: { id } },
+      });
+      if (existing) {
+        throw new ConflictException(
+          `Beziehungstyp "${dto.name}" existiert bereits`,
+        );
+      }
+    }
+
+    return this.prisma.relationshipType.update({
+      where: { id },
+      data: dto,
+      include: {
+        _count: { select: { relationships: true } },
+      },
+    });
+  }
+
+  async remove(tenantId: string, id: string) {
+    const relType = await this.findOne(tenantId, id);
+
+    if (relType._count.relationships > 0) {
+      throw new ConflictException(
+        `Beziehungstyp kann nicht geloescht werden — ${relType._count.relationships} Beziehungen zugeordnet`,
+      );
+    }
+
+    return this.prisma.relationshipType.delete({ where: { id } });
+  }
+}

packages/frontend/src/crm/activities/ActivityFormModal.tsx

@@ -6,7 +6,8 @@ import type { Activity, ActivityType } from '../types';
 interface ActivityFormModalProps {
   isOpen: boolean;
   onClose: () => void;
-  contactId: string;
+  contactId?: string;
+  companyId?: string;
   activity?: Activity | null;
   onSuccess: () => void;
 }
@@ -51,6 +52,7 @@ export function ActivityFormModal({
   isOpen,
   onClose,
   contactId,
+  companyId,
   activity,
   onSuccess,
 }: ActivityFormModalProps) {
@@ -127,7 +129,8 @@ export function ActivityFormModal({
     } else {
       createMutation.mutate(
         {
-          contactId,
+          ...(contactId ? { contactId } : {}),
+          ...(companyId ? { companyId } : {}),
           type,
           subject: subject.trim(),
           ...(description ? { description } : {}),

packages/frontend/src/crm/api.ts

@@ -26,6 +26,18 @@ import type {
   CreateCompanyPayload,
   UpdateCompanyPayload,
   CompaniesQueryParams,
+  Industry,
+  CreateIndustryPayload,
+  UpdateIndustryPayload,
+  AccountType,
+  CreateAccountTypePayload,
+  UpdateAccountTypePayload,
+  RelationshipType,
+  CreateRelationshipTypePayload,
+  UpdateRelationshipTypePayload,
+  CompanyRelationship,
+  CreateCompanyRelationshipPayload,
+  TenantUser,
   LexwareContact,
   LexwareContactSearchParams,
   LexwareVoucher,
@@ -205,6 +217,126 @@ export const companiesApi = {
       .then((r) => r.data),
 };
 
+// --- Industries ---
+
+export const industriesApi = {
+  list: () =>
+    api
+      .get<{ success: boolean; data: Industry[]; meta: { timestamp: string } }>(
+        '/crm/industries',
+      )
+      .then((r) => r.data),
+
+  create: (data: CreateIndustryPayload) =>
+    api
+      .post<SingleResponse<Industry>>('/crm/industries', data)
+      .then((r) => r.data),
+
+  update: (id: string, data: UpdateIndustryPayload) =>
+    api
+      .patch<SingleResponse<Industry>>(`/crm/industries/${id}`, data)
+      .then((r) => r.data),
+
+  delete: (id: string) =>
+    api
+      .delete<SingleResponse<Industry>>(`/crm/industries/${id}`)
+      .then((r) => r.data),
+};
+
+// --- Account Types ---
+
+export const accountTypesApi = {
+  list: () =>
+    api
+      .get<{ success: boolean; data: AccountType[]; meta: { timestamp: string } }>(
+        '/crm/account-types',
+      )
+      .then((r) => r.data),
+
+  create: (data: CreateAccountTypePayload) =>
+    api
+      .post<SingleResponse<AccountType>>('/crm/account-types', data)
+      .then((r) => r.data),
+
+  update: (id: string, data: UpdateAccountTypePayload) =>
+    api
+      .patch<SingleResponse<AccountType>>(`/crm/account-types/${id}`, data)
+      .then((r) => r.data),
+
+  delete: (id: string) =>
+    api
+      .delete<SingleResponse<AccountType>>(`/crm/account-types/${id}`)
+      .then((r) => r.data),
+};
+
+// --- Relationship Types ---
+
+export const relationshipTypesApi = {
+  list: () =>
+    api
+      .get<{ success: boolean; data: RelationshipType[]; meta: { timestamp: string } }>(
+        '/crm/relationship-types',
+      )
+      .then((r) => r.data),
+
+  create: (data: CreateRelationshipTypePayload) =>
+    api
+      .post<SingleResponse<RelationshipType>>('/crm/relationship-types', data)
+      .then((r) => r.data),
+
+  update: (id: string, data: UpdateRelationshipTypePayload) =>
+    api
+      .patch<SingleResponse<RelationshipType>>(
+        `/crm/relationship-types/${id}`,
+        data,
+      )
+      .then((r) => r.data),
+
+  delete: (id: string) =>
+    api
+      .delete<SingleResponse<RelationshipType>>(
+        `/crm/relationship-types/${id}`,
+      )
+      .then((r) => r.data),
+};
+
+// --- Company Relationships ---
+
+export const companyRelationshipsApi = {
+  list: (companyId: string) =>
+    api
+      .get<{ success: boolean; data: CompanyRelationship[]; meta: { timestamp: string } }>(
+        `/crm/companies/${companyId}/relationships`,
+      )
+      .then((r) => r.data),
+
+  create: (companyId: string, data: CreateCompanyRelationshipPayload) =>
+    api
+      .post<SingleResponse<CompanyRelationship>>(
+        `/crm/companies/${companyId}/relationships`,
+        data,
+      )
+      .then((r) => r.data),
+
+  delete: (companyId: string, relationshipId: string) =>
+    api
+      .delete<SingleResponse<CompanyRelationship>>(
+        `/crm/companies/${companyId}/relationships/${relationshipId}`,
+      )
+      .then((r) => r.data),
+};
+
+// --- Tenant Users ---
+
+export const usersApi = {
+  list: () =>
+    api
+      .get<{ success: boolean; data: TenantUser[]; meta: { timestamp: string } }>(
+        '/crm/users',
+      )
+      .then((r) => r.data),
+};
+
 // --- Lexware Office: Contacts ---
 
 export const lexwareContactsApi = {

packages/frontend/src/crm/companies/ActivityFeed.tsx

@@ -0,0 +1,230 @@
+import { useState } from 'react';
+import { useCompanyActivities, useCreateActivity } from '../hooks';
+import type { Activity, ActivityType } from '../types';
+import styles from './CompanyDetailPage.module.css';
+
+// ============================================================
+//  Constants
+// ============================================================
+
+const ACTIVITY_TYPE_LABELS: Record<ActivityType, string> = {
+  NOTE: 'Notiz',
+  CALL: 'Anruf',
+  EMAIL: 'E-Mail',
+  MEETING: 'Meeting',
+  TASK: 'Aufgabe',
+};
+
+const iconSvgProps = {
+  width: 14,
+  height: 14,
+  stroke: 'currentColor',
+  fill: 'none',
+  strokeWidth: 1.5,
+  strokeLinecap: 'round' as const,
+  strokeLinejoin: 'round' as const,
+};
+
+function ActivityIcon({ type }: { type: ActivityType }) {
+  switch (type) {
+    case 'NOTE':
+      return (
+        <svg {...iconSvgProps} viewBox="0 0 16 16">
+          <rect x="2" y="2" width="12" height="12" rx="1" />
+          <path d="M5 5h6M5 8h6M5 11h3" />
+        </svg>
+      );
+    case 'CALL':
+      return (
+        <svg {...iconSvgProps} viewBox="0 0 16 16">
+          <path d="M3 2h3l1.5 3L6 6.5c.7 1.4 2.1 2.8 3.5 3.5L11 8.5l3 1.5v3a1 1 0 01-1 1C7 14 2 9 2 3a1 1 0 011-1z" />
+        </svg>
+      );
+    case 'EMAIL':
+      return (
+        <svg {...iconSvgProps} viewBox="0 0 16 16">
+          <rect x="1" y="3" width="14" height="10" rx="1" />
+          <path d="M1 4l7 5 7-5" />
+        </svg>
+      );
+    case 'MEETING':
+      return (
+        <svg {...iconSvgProps} viewBox="0 0 16 16">
+          <circle cx="5" cy="5" r="2" />
+          <circle cx="11" cy="5" r="2" />
+          <path d="M1 12c0-2 2-3 4-3s4 1 4 3M7 12c0-2 2-3 4-3s4 1 4 3" />
+        </svg>
+      );
+    case 'TASK':
+      return (
+        <svg {...iconSvgProps} viewBox="0 0 16 16">
+          <rect x="2" y="2" width="12" height="12" rx="1" />
+          <path d="M5 8l2 2 4-4" />
+        </svg>
+      );
+    default:
+      return null;
+  }
+}
+
+function formatDateTime(iso: string): string {
+  return new Date(iso).toLocaleDateString('de-DE', {
+    day: '2-digit',
+    month: '2-digit',
+    year: 'numeric',
+    hour: '2-digit',
+    minute: '2-digit',
+  });
+}
+
+function contactDisplayName(a: Activity): string | null {
+  if (!a.contact) return null;
+  const parts = [a.contact.firstName, a.contact.lastName].filter(Boolean);
+  return parts.length > 0 ? parts.join(' ') : a.contact.companyName ?? null;
+}
+
+// ============================================================
+//  Feed Tabs
+// ============================================================
+
+type FeedTab = 'NOTE' | 'EMAIL' | 'TASK';
+
+const FEED_TABS: { key: FeedTab; label: string; enabled: boolean }[] = [
+  { key: 'NOTE', label: 'Notiz', enabled: true },
+  { key: 'EMAIL', label: 'E-Mail', enabled: false },
+  { key: 'TASK', label: 'Aufgabe', enabled: false },
+];
+
+// ============================================================
+//  Component
+// ============================================================
+
+interface ActivityFeedProps {
+  companyId: string;
+}
+
+export function ActivityFeed({ companyId }: ActivityFeedProps) {
+  const { data, isLoading } = useCompanyActivities(companyId);
+  const createMut = useCreateActivity();
+
+  const [activeTab, setActiveTab] = useState<FeedTab>('NOTE');
+  const [subject, setSubject] = useState('');
+  const [description, setDescription] = useState('');
+
+  const activities: Activity[] = data?.data ?? [];
+
+  const handleSubmit = () => {
+    if (!subject.trim()) return;
+    createMut.mutate(
+      {
+        companyId,
+        type: activeTab as ActivityType,
+        subject: subject.trim(),
+        ...(description.trim() ? { description: description.trim() } : {}),
+      },
+      {
+        onSuccess: () => {
+          setSubject('');
+          setDescription('');
+        },
+      },
+    );
+  };
+
+  return (
+    <div className={styles.card}>
+      <h2 className={styles.cardTitle}>Aktivitäten</h2>
+
+      {/* Input Area */}
+      <div className={styles.feedInputArea}>
+        <div className={styles.feedTabs}>
+          {FEED_TABS.map((tab) => (
+            <button
+              key={tab.key}
+              className={`${styles.feedTab} ${activeTab === tab.key ? styles.feedTabActive : ''}`}
+              onClick={() => tab.enabled && setActiveTab(tab.key)}
+              disabled={!tab.enabled}
+              style={!tab.enabled ? { opacity: 0.4, cursor: 'not-allowed' } : undefined}
+              title={!tab.enabled ? 'Bald verfügbar' : undefined}
+            >
+              {tab.label}
+            </button>
+          ))}
+        </div>
+
+        <div className={styles.feedForm}>
+          <input
+            className={styles.feedSubjectInput}
+            value={subject}
+            onChange={(e) => setSubject(e.target.value)}
+            placeholder="Betreff..."
+            onKeyDown={(e) => {
+              if (e.key === 'Enter' && !e.shiftKey) {
+                e.preventDefault();
+                handleSubmit();
+              }
+            }}
+          />
+          <textarea
+            className={styles.feedTextarea}
+            value={description}
+            onChange={(e) => setDescription(e.target.value)}
+            placeholder="Beschreibung (optional)..."
+            rows={2}
+          />
+          <div className={styles.feedSubmitRow}>
+            <button
+              className={styles.feedSubmitBtn}
+              onClick={handleSubmit}
+              disabled={!subject.trim() || createMut.isPending}
+            >
+              {createMut.isPending ? 'Speichern...' : 'Hinzufügen'}
+            </button>
+          </div>
+        </div>
+      </div>
+
+      {/* Activity List */}
+      {isLoading ? (
+        <p style={{ color: 'var(--color-text-muted)', fontSize: '0.875rem' }}>
+          Laden...
+        </p>
+      ) : activities.length === 0 ? (
+        <div className={styles.feedEmpty}>
+          Noch keine Aktivitäten vorhanden
+        </div>
+      ) : (
+        <div className={styles.feedList}>
+          {activities.map((activity) => {
+            const viaName = contactDisplayName(activity);
+            return (
+              <div key={activity.id} className={styles.feedItem}>
+                <div className={styles.feedIcon}>
+                  <ActivityIcon type={activity.type} />
+                </div>
+                <div className={styles.feedContent}>
+                  <div className={styles.feedSubject}>{activity.subject}</div>
+                  <div className={styles.feedMeta}>
+                    <span>{ACTIVITY_TYPE_LABELS[activity.type]}</span>
+                    <span>·</span>
+                    <span>{formatDateTime(activity.createdAt)}</span>
+                    {viaName && activity.contactId && !activity.companyId && (
+                      <span className={styles.feedViaBadge}>
+                        via {viaName}
+                      </span>
+                    )}
+                  </div>
+                  {activity.description && (
+                    <div className={styles.feedDesc}>
+                      {activity.description}
+                    </div>
+                  )}
+                </div>
+              </div>
+            );
+          })}
+        </div>
+      )}
+    </div>
+  );
+}

packages/frontend/src/crm/companies/CompanyDetailPage.module.css

@@ -1,5 +1,5 @@
 /* ============================================================
-   CompanyDetailPage – Layout & Komponenten
+   CompanyDetailPage – 3-Spalten Layout & Komponenten
    ============================================================ */
 
 .backLink {
@@ -39,19 +39,45 @@
   color: var(--color-text);
 }
 
+.industryBadge {
+  display: inline-block;
+  padding: 0.125rem 0.5rem;
+  border-radius: 9999px;
+  font-size: 0.75rem;
+  font-weight: 500;
+  color: white;
+}
+
+/* ============================================================
+   3-Spalten Grid
+   ============================================================ */
+
 .layout {
   display: grid;
-  grid-template-columns: 1fr 400px;
+  grid-template-columns: 300px 1fr 360px;
   gap: 1.5rem;
   align-items: start;
 }
 
-@media (max-width: 960px) {
+@media (max-width: 1200px) {
+  .layout {
+    grid-template-columns: 1fr 360px;
+  }
+  .layout > :first-child {
+    grid-column: 1 / -1;
+  }
+}
+
+@media (max-width: 768px) {
   .layout {
     grid-template-columns: 1fr;
   }
 }
 
+/* ============================================================
+   Cards
+   ============================================================ */
+
 .card {
   background: var(--color-bg-card);
   border-radius: var(--radius-md);
@@ -67,21 +93,38 @@
   color: var(--color-text);
 }
 
+.cardTitleRow {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: 1rem;
+}
+
+.cardTitleRow h2 {
+  margin: 0;
+}
+
+/* ============================================================
+   Info Grid (linke Spalte)
+   ============================================================ */
+
 .infoGrid {
   display: grid;
-  grid-template-columns: 120px 1fr;
+  grid-template-columns: 100px 1fr;
-  gap: 0.5rem 1rem;
+  gap: 0.5rem 0.75rem;
-  font-size: 0.875rem;
+  font-size: 0.8125rem;
 }
 
 .infoLabel {
   color: var(--color-text-muted);
   font-weight: 500;
+  font-size: 0.8125rem;
 }
 
 .infoValue {
   color: var(--color-text);
   word-break: break-word;
+  font-size: 0.8125rem;
 }
 
 .tags {
@@ -96,7 +139,7 @@
   background: var(--color-bg);
   border: 1px solid var(--color-border);
   border-radius: 9999px;
-  font-size: 0.75rem;
+  font-size: 0.6875rem;
   color: var(--color-text-secondary);
 }
 
@@ -107,9 +150,339 @@
 }
 
 .notesText {
-  font-size: 0.875rem;
+  font-size: 0.8125rem;
   color: var(--color-text-secondary);
   white-space: pre-wrap;
   line-height: 1.5;
   margin: 0;
 }
+
+/* ============================================================
+   Activity Feed (mittlere Spalte)
+   ============================================================ */
+
+.feedContainer {
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+}
+
+.feedInputArea {
+  margin-bottom: 1rem;
+}
+
+.feedTabs {
+  display: flex;
+  gap: 0;
+  border-bottom: 1px solid var(--color-border);
+  margin-bottom: 0.75rem;
+}
+
+.feedTab {
+  padding: 0.5rem 1rem;
+  font-size: 0.8125rem;
+  font-weight: 500;
+  color: var(--color-text-muted);
+  background: none;
+  border: none;
+  border-bottom: 2px solid transparent;
+  cursor: pointer;
+  transition: color 0.15s, border-color 0.15s;
+}
+
+.feedTab:hover {
+  color: var(--color-text);
+}
+
+.feedTabActive {
+  color: var(--color-primary);
+  border-bottom-color: var(--color-primary);
+}
+
+.feedForm {
+  display: flex;
+  flex-direction: column;
+  gap: 0.5rem;
+}
+
+.feedSubjectInput {
+  padding: 0.5rem 0.75rem;
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-sm);
+  font-size: 0.8125rem;
+  outline: none;
+  background: var(--color-bg-card);
+  color: var(--color-text);
+}
+
+.feedSubjectInput:focus {
+  border-color: var(--color-primary);
+}
+
+.feedTextarea {
+  padding: 0.5rem 0.75rem;
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-sm);
+  font-size: 0.8125rem;
+  outline: none;
+  resize: vertical;
+  min-height: 60px;
+  background: var(--color-bg-card);
+  color: var(--color-text);
+}
+
+.feedTextarea:focus {
+  border-color: var(--color-primary);
+}
+
+.feedSubmitRow {
+  display: flex;
+  justify-content: flex-end;
+}
+
+.feedSubmitBtn {
+  padding: 0.375rem 0.75rem;
+  font-size: 0.8125rem;
+  font-weight: 500;
+  background: var(--color-primary);
+  color: white;
+  border: none;
+  border-radius: var(--radius-sm);
+  cursor: pointer;
+  transition: opacity 0.15s;
+}
+
+.feedSubmitBtn:hover {
+  opacity: 0.9;
+}
+
+.feedSubmitBtn:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+.feedList {
+  display: flex;
+  flex-direction: column;
+  gap: 0;
+  max-height: 600px;
+  overflow-y: auto;
+}
+
+.feedItem {
+  display: flex;
+  gap: 0.75rem;
+  padding: 0.75rem 0;
+  border-bottom: 1px solid var(--color-border);
+}
+
+.feedItem:last-child {
+  border-bottom: none;
+}
+
+.feedIcon {
+  flex-shrink: 0;
+  width: 32px;
+  height: 32px;
+  border-radius: 50%;
+  background: var(--color-bg);
+  border: 1px solid var(--color-border);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  color: var(--color-text-muted);
+}
+
+.feedContent {
+  flex: 1;
+  min-width: 0;
+}
+
+.feedSubject {
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: var(--color-text);
+}
+
+.feedMeta {
+  font-size: 0.75rem;
+  color: var(--color-text-muted);
+  margin-top: 0.125rem;
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  flex-wrap: wrap;
+}
+
+.feedViaBadge {
+  display: inline-block;
+  padding: 0 0.375rem;
+  border-radius: 9999px;
+  font-size: 0.6875rem;
+  background: #e0e7ff;
+  color: #3730a3;
+  font-weight: 500;
+}
+
+:global([data-theme='dark']) .feedViaBadge {
+  background: #312e81;
+  color: #c7d2fe;
+}
+
+.feedDesc {
+  font-size: 0.8125rem;
+  color: var(--color-text-secondary);
+  margin-top: 0.375rem;
+  white-space: pre-wrap;
+}
+
+.feedEmpty {
+  padding: 2rem 1rem;
+  text-align: center;
+  color: var(--color-text-muted);
+  font-size: 0.875rem;
+}
+
+/* ============================================================
+   Relationships Card (rechte Spalte)
+   ============================================================ */
+
+.relationItem {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 0.5rem 0;
+  border-bottom: 1px solid var(--color-border);
+}
+
+.relationItem:last-child {
+  border-bottom: none;
+}
+
+.relationInfo {
+  display: flex;
+  flex-direction: column;
+  gap: 0.125rem;
+}
+
+.relationName {
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: var(--color-primary);
+  cursor: pointer;
+}
+
+.relationName:hover {
+  text-decoration: underline;
+}
+
+.relationTypeBadge {
+  display: inline-block;
+  padding: 0 0.375rem;
+  border-radius: 9999px;
+  font-size: 0.6875rem;
+  background: var(--color-bg);
+  border: 1px solid var(--color-border);
+  color: var(--color-text-secondary);
+}
+
+.relationDeleteBtn {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 24px;
+  height: 24px;
+  border: none;
+  border-radius: var(--radius-sm);
+  background: transparent;
+  color: var(--color-text-muted);
+  cursor: pointer;
+  transition: background 0.15s, color 0.15s;
+}
+
+.relationDeleteBtn:hover {
+  background: #fef2f2;
+  color: #dc2626;
+}
+
+:global([data-theme='dark']) .relationDeleteBtn:hover {
+  background: #450a0a;
+  color: #fca5a5;
+}
+
+/* ============================================================
+   Placeholder Card
+   ============================================================ */
+
+.placeholderCard {
+  opacity: 0.6;
+  text-align: center;
+  padding: 1.5rem;
+}
+
+.placeholderCard p {
+  color: var(--color-text-muted);
+  font-size: 0.8125rem;
+  margin: 0;
+}
+
+/* ============================================================
+   Small Add Button in Cards
+   ============================================================ */
+
+.smallAddBtn {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.25rem;
+  padding: 0.25rem 0.5rem;
+  font-size: 0.75rem;
+  font-weight: 500;
+  color: var(--color-primary);
+  background: transparent;
+  border: 1px solid var(--color-primary);
+  border-radius: var(--radius-sm);
+  cursor: pointer;
+  transition: background 0.15s, color 0.15s;
+}
+
+.smallAddBtn:hover {
+  background: var(--color-primary);
+  color: white;
+}
+
+/* ============================================================
+   Compact Table (rechte Spalte)
+   ============================================================ */
+
+.compactTable {
+  width: 100%;
+  border-collapse: collapse;
+  font-size: 0.8125rem;
+}
+
+.compactTable th {
+  text-align: left;
+  padding: 0.375rem 0;
+  font-size: 0.6875rem;
+  text-transform: uppercase;
+  color: var(--color-text-muted);
+  border-bottom: 1px solid var(--color-border);
+  font-weight: 500;
+}
+
+.compactTable td {
+  padding: 0.375rem 0;
+  border-bottom: 1px solid var(--color-border);
+}
+
+.compactTable tr:last-child td {
+  border-bottom: none;
+}
+
+.compactTable tr[data-clickable='true'] {
+  cursor: pointer;
+}
+
+.compactTable tr[data-clickable='true']:hover td {
+  background: var(--color-bg);
+}

packages/frontend/src/crm/companies/CompanyDetailPage.tsx

@@ -2,11 +2,18 @@ import { useState } from 'react';
 import { useParams, Link, useNavigate } from 'react-router-dom';
 import { useCompany, useDeleteCompany } from '../hooks';
 import { CompanyFormModal } from './CompanyFormModal';
+import { ActivityFeed } from './ActivityFeed';
+import { CompanyRelationshipsCard } from './CompanyRelationshipsCard';
+import { ContractsCard } from './ContractsCard';
 import { Modal } from '../../components/Modal';
 import { LexwareSection } from '../lexware/LexwareSection';
 import type { DealStatus } from '../types';
 import styles from './CompanyDetailPage.module.css';
 
+// ============================================================
+//  Constants
+// ============================================================
+
 const STATUS_COLORS: Record<DealStatus, { bg: string; color: string }> = {
   OPEN: { bg: '#dbeafe', color: '#1e40af' },
   WON: { bg: '#d1fae5', color: '#065f46' },
@@ -32,6 +39,10 @@ function formatDate(iso: string): string {
   });
 }
 
+// ============================================================
+//  Page Component
+// ============================================================
+
 export function CompanyDetailPage() {
   const { id } = useParams<{ id: string }>();
   const navigate = useNavigate();
@@ -53,6 +64,10 @@ export function CompanyDetailPage() {
   const contacts = company.contacts ?? [];
   const deals = company.deals ?? [];
 
+  // Industry badge color
+  const industryColor = company.industryRef?.color ?? '#6366f1';
+  const industryName = company.industryRef?.name ?? company.industry;
+
   return (
     <div>
       {/* Zurück */}
@@ -74,19 +89,12 @@ export function CompanyDetailPage() {
       <div className={styles.header}>
         <div className={styles.headerLeft}>
           <h1 className={styles.name}>{company.name}</h1>
-          {company.industry && (
+          {industryName && (
             <span
-              style={{
+              className={styles.industryBadge}
-                display: 'inline-block',
+              style={{ backgroundColor: industryColor }}
-                padding: '0.125rem 0.5rem',
-                borderRadius: '9999px',
-                fontSize: '0.75rem',
-                fontWeight: 500,
-                background: '#e0e7ff',
-                color: '#3730a3',
-              }}
             >
-              {company.industry}
+              {industryName}
             </span>
           )}
           <span
@@ -134,13 +142,25 @@ export function CompanyDetailPage() {
         </div>
       </div>
 
-      {/* 2-Spalten Layout */}
+      {/* 3-Spalten Layout */}
       <div className={styles.layout}>
-        {/* Links: Info */}
+        {/* ======== Linke Spalte: Stammdaten ======== */}
         <div>
           <div className={styles.card}>
             <h2 className={styles.cardTitle}>Unternehmensdaten</h2>
             <div className={styles.infoGrid}>
+              {company.accountType && (
+                <>
+                  <span className={styles.infoLabel}>Kontotyp</span>
+                  <span className={styles.infoValue}>{company.accountType.name}</span>
+                </>
+              )}
+              {company.ownerName && (
+                <>
+                  <span className={styles.infoLabel}>Zuständig</span>
+                  <span className={styles.infoValue}>{company.ownerName}</span>
+                </>
+              )}
               {company.email && (
                 <>
                   <span className={styles.infoLabel}>E-Mail</span>
@@ -187,7 +207,7 @@ export function CompanyDetailPage() {
                   </span>
                 </>
               )}
-              <span className={styles.infoLabel}>Erstellt am</span>
+              <span className={styles.infoLabel}>Erstellt</span>
               <span className={styles.infoValue}>
                 {formatDate(company.createdAt)}
               </span>
@@ -227,59 +247,30 @@ export function CompanyDetailPage() {
           </div>
         </div>
 
-        {/* Rechts: Kontakte + Vorgänge + Lexware */}
+        {/* ======== Mittlere Spalte: Activity Feed ======== */}
+        <div>
+          <ActivityFeed companyId={company.id} />
+        </div>
+
+        {/* ======== Rechte Spalte: Relations ======== */}
         <div style={{ display: 'flex', flexDirection: 'column', gap: '1.5rem' }}>
           {/* Kontakte */}
           <div className={styles.card}>
-            <h2 className={styles.cardTitle}>
+            <div className={styles.cardTitleRow}>
-              Kontakte ({company._count?.contacts ?? contacts.length})
+              <h2 className={styles.cardTitle} style={{ marginBottom: 0 }}>
-            </h2>
+                Kontakte ({company._count?.contacts ?? contacts.length})
+              </h2>
+            </div>
             {contacts.length === 0 ? (
-              <p
+              <p style={{ color: 'var(--color-text-muted)', fontSize: '0.8125rem' }}>
-                style={{
-                  color: 'var(--color-text-muted)',
-                  fontSize: '0.875rem',
-                }}
-              >
                 Keine Kontakte vorhanden
               </p>
             ) : (
-              <table style={{ width: '100%', borderCollapse: 'collapse' }}>
+              <table className={styles.compactTable}>
                 <thead>
-                  <tr style={{ borderBottom: '1px solid var(--color-border)' }}>
+                  <tr>
-                    <th
+                    <th>Name</th>
-                      style={{
+                    <th>Position</th>
-                        padding: '0.5rem 0',
-                        textAlign: 'left',
-                        fontSize: '0.75rem',
-                        color: 'var(--color-text-muted)',
-                        textTransform: 'uppercase',
-                      }}
-                    >
-                      Name
-                    </th>
-                    <th
-                      style={{
-                        padding: '0.5rem 0',
-                        textAlign: 'left',
-                        fontSize: '0.75rem',
-                        color: 'var(--color-text-muted)',
-                        textTransform: 'uppercase',
-                      }}
-                    >
-                      Position
-                    </th>
-                    <th
-                      style={{
-                        padding: '0.5rem 0',
-                        textAlign: 'left',
-                        fontSize: '0.75rem',
-                        color: 'var(--color-text-muted)',
-                        textTransform: 'uppercase',
-                      }}
-                    >
-                      E-Mail
-                    </th>
                   </tr>
                 </thead>
                 <tbody>
@@ -290,38 +281,13 @@ export function CompanyDetailPage() {
                     return (
                       <tr
                         key={c.id}
-                        style={{
+                        data-clickable="true"
-                          borderBottom: '1px solid var(--color-border)',
-                          cursor: 'pointer',
-                        }}
                         onClick={() => navigate(`/crm/contacts/${c.id}`)}
                       >
-                        <td
+                        <td style={{ fontWeight: 500 }}>{name}</td>
-                          style={{
+                        <td style={{ color: 'var(--color-text-secondary)' }}>
-                            padding: '0.5rem 0',
-                            fontSize: '0.875rem',
-                          }}
-                        >
-                          {name}
-                        </td>
-                        <td
-                          style={{
-                            padding: '0.5rem 0',
-                            fontSize: '0.8125rem',
-                            color: 'var(--color-text-secondary)',
-                          }}
-                        >
                           {c.position ?? '—'}
                         </td>
-                        <td
-                          style={{
-                            padding: '0.5rem 0',
-                            fontSize: '0.8125rem',
-                            color: 'var(--color-text-secondary)',
-                          }}
-                        >
-                          {c.email ?? '—'}
-                        </td>
                       </tr>
                     );
                   })}
@@ -332,81 +298,40 @@ export function CompanyDetailPage() {
 
           {/* Vorgänge */}
           <div className={styles.card}>
-            <h2 className={styles.cardTitle}>
+            <div className={styles.cardTitleRow}>
-              Vorgänge ({company._count?.deals ?? deals.length})
+              <h2 className={styles.cardTitle} style={{ marginBottom: 0 }}>
-            </h2>
+                Vorgänge ({company._count?.deals ?? deals.length})
+              </h2>
+            </div>
             {deals.length === 0 ? (
-              <p
+              <p style={{ color: 'var(--color-text-muted)', fontSize: '0.8125rem' }}>
-                style={{
-                  color: 'var(--color-text-muted)',
-                  fontSize: '0.875rem',
-                }}
-              >
                 Keine Vorgänge vorhanden
               </p>
             ) : (
-              <table style={{ width: '100%', borderCollapse: 'collapse' }}>
+              <table className={styles.compactTable}>
                 <thead>
-                  <tr style={{ borderBottom: '1px solid var(--color-border)' }}>
+                  <tr>
-                    <th
+                    <th>Titel</th>
-                      style={{
+                    <th>Stufe</th>
-                        padding: '0.5rem 0',
+                    <th style={{ textAlign: 'right' }}>Wert</th>
-                        textAlign: 'left',
-                        fontSize: '0.75rem',
-                        color: 'var(--color-text-muted)',
-                        textTransform: 'uppercase',
-                      }}
-                    >
-                      Titel
-                    </th>
-                    <th
-                      style={{
-                        padding: '0.5rem 0',
-                        textAlign: 'left',
-                        fontSize: '0.75rem',
-                        color: 'var(--color-text-muted)',
-                        textTransform: 'uppercase',
-                      }}
-                    >
-                      Stage
-                    </th>
-                    <th
-                      style={{
-                        padding: '0.5rem 0',
-                        textAlign: 'right',
-                        fontSize: '0.75rem',
-                        color: 'var(--color-text-muted)',
-                        textTransform: 'uppercase',
-                      }}
-                    >
-                      Wert
-                    </th>
                   </tr>
                 </thead>
                 <tbody>
                   {deals.map((deal) => (
                     <tr
                       key={deal.id}
-                      style={{
+                      data-clickable="true"
-                        borderBottom: '1px solid var(--color-border)',
-                        cursor: 'pointer',
-                      }}
                       onClick={() => navigate(`/crm/deals/${deal.id}`)}
                     >
-                      <td
+                      <td>
-                        style={{
+                        <div style={{ display: 'flex', alignItems: 'center', gap: '0.375rem' }}>
-                          padding: '0.5rem 0',
+                          <span style={{ fontWeight: 500 }}>{deal.title}</span>
-                          fontSize: '0.875rem',
-                        }}
-                      >
-                        <div style={{ display: 'flex', alignItems: 'center', gap: '0.5rem' }}>
-                          {deal.title}
                           <span
                             style={{
                               display: 'inline-block',
-                              padding: '0 0.375rem',
+                              padding: '0 0.25rem',
                               borderRadius: '9999px',
-                              fontSize: '0.6875rem',
+                              fontSize: '0.625rem',
                               fontWeight: 500,
                               background: STATUS_COLORS[deal.status].bg,
                               color: STATUS_COLORS[deal.status].color,
@@ -416,20 +341,19 @@ export function CompanyDetailPage() {
                           </span>
                         </div>
                       </td>
-                      <td style={{ padding: '0.5rem 0' }}>
+                      <td style={{ minWidth: 80 }}>
                         {deal.stage && (
                           <span
                             style={{
                               display: 'inline-flex',
                               alignItems: 'center',
-                              gap: '0.375rem',
+                              gap: '0.25rem',
-                              fontSize: '0.8125rem',
                             }}
                           >
                             <span
                               style={{
-                                width: 8,
+                                width: 6,
-                                height: 8,
+                                height: 6,
                                 borderRadius: '50%',
                                 background: deal.stage.color,
                                 display: 'inline-block',
@@ -439,14 +363,7 @@ export function CompanyDetailPage() {
                           </span>
                         )}
                       </td>
-                      <td
+                      <td style={{ textAlign: 'right', fontWeight: 500, whiteSpace: 'nowrap' }}>
-                        style={{
-                          padding: '0.5rem 0',
-                          textAlign: 'right',
-                          fontSize: '0.875rem',
-                          fontWeight: 500,
-                        }}
-                      >
                         {deal.value
                           ? currencyFormatter.format(parseFloat(deal.value))
                           : '—'}
@@ -458,6 +375,15 @@ export function CompanyDetailPage() {
             )}
           </div>
 
+          {/* Beziehungen */}
+          <CompanyRelationshipsCard companyId={company.id} />
+
+          {/* Verträge (Platzhalter) */}
+          <ContractsCard
+            companyId={company.id}
+            contractCount={company._count?.contracts ?? 0}
+          />
+
           {/* Lexware Office */}
           <LexwareSection
             entityType="company"

packages/frontend/src/crm/companies/CompanyFormModal.tsx

@@ -1,6 +1,12 @@
 import { useState, useEffect } from 'react';
 import { Modal } from '../../components/Modal';
-import { useCreateCompany, useUpdateCompany } from '../hooks';
+import {
+  useCreateCompany,
+  useUpdateCompany,
+  useIndustries,
+  useAccountTypes,
+  useTenantUsers,
+} from '../hooks';
 import type { Company } from '../types';
 
 interface CompanyFormModalProps {
@@ -30,6 +36,11 @@ const inputStyle: React.CSSProperties = {
   color: 'var(--color-text)',
 };
 
+const selectStyle: React.CSSProperties = {
+  ...inputStyle,
+  cursor: 'pointer',
+};
+
 const rowStyle: React.CSSProperties = {
   display: 'grid',
   gridTemplateColumns: '1fr 1fr',
@@ -47,9 +58,20 @@ export function CompanyFormModal({
   const updateMutation = useUpdateCompany();
   const mutation = isEditMode ? updateMutation : createMutation;
 
+  // Dropdown data
+  const { data: industriesData } = useIndustries();
+  const { data: accountTypesData } = useAccountTypes();
+  const { data: usersData } = useTenantUsers();
+
+  const industries = industriesData?.data ?? [];
+  const accountTypes = accountTypesData?.data ?? [];
+  const tenantUsers = usersData?.data ?? [];
+
   const [error, setError] = useState('');
   const [name, setName] = useState('');
-  const [industry, setIndustry] = useState('');
+  const [industryId, setIndustryId] = useState('');
+  const [accountTypeId, setAccountTypeId] = useState('');
+  const [ownerId, setOwnerId] = useState('');
   const [email, setEmail] = useState('');
   const [phone, setPhone] = useState('');
   const [website, setWebsite] = useState('');
@@ -65,7 +87,9 @@ export function CompanyFormModal({
       setError('');
       if (company) {
         setName(company.name);
-        setIndustry(company.industry ?? '');
+        setIndustryId(company.industryId ?? '');
+        setAccountTypeId(company.accountTypeId ?? '');
+        setOwnerId(company.ownerId ?? '');
         setEmail(company.email ?? '');
         setPhone(company.phone ?? '');
         setWebsite(company.website ?? '');
@@ -77,7 +101,9 @@ export function CompanyFormModal({
         setTagsInput(company.tags?.join(', ') ?? '');
       } else {
         setName('');
-        setIndustry('');
+        setIndustryId('');
+        setAccountTypeId('');
+        setOwnerId('');
         setEmail('');
         setPhone('');
         setWebsite('');
@@ -105,9 +131,19 @@ export function CompanyFormModal({
       .map((t) => t.trim())
       .filter(Boolean);
 
+    // Resolve ownerName from selected ownerId
+    const selectedUser = ownerId
+      ? tenantUsers.find((u) => u.id === ownerId)
+      : null;
+    const ownerName = selectedUser
+      ? [selectedUser.firstName, selectedUser.lastName].filter(Boolean).join(' ') || selectedUser.email
+      : undefined;
+
     const payload = {
       name: name.trim(),
-      ...(industry ? { industry } : {}),
+      ...(industryId ? { industryId } : {}),
+      ...(accountTypeId ? { accountTypeId } : {}),
+      ...(ownerId ? { ownerId, ownerName } : {}),
       ...(email ? { email } : {}),
       ...(phone ? { phone } : {}),
       ...(website ? { website } : {}),
@@ -183,12 +219,55 @@ export function CompanyFormModal({
           </div>
           <div>
             <label style={labelStyle}>Branche</label>
-            <input
+            <select
-              style={inputStyle}
+              style={selectStyle}
-              value={industry}
+              value={industryId}
-              onChange={(e) => setIndustry(e.target.value)}
+              onChange={(e) => setIndustryId(e.target.value)}
-              placeholder="z.B. Enterprise Software"
+            >
-            />
+              <option value="">— Keine —</option>
+              {industries.map((ind) => (
+                <option key={ind.id} value={ind.id}>
+                  {ind.name}
+                </option>
+              ))}
+            </select>
+          </div>
+        </div>
+
+        {/* Kontotyp + Zuständigkeit */}
+        <div style={{ ...rowStyle, marginBottom: '1rem' }}>
+          <div>
+            <label style={labelStyle}>Kontotyp</label>
+            <select
+              style={selectStyle}
+              value={accountTypeId}
+              onChange={(e) => setAccountTypeId(e.target.value)}
+            >
+              <option value="">— Keine —</option>
+              {accountTypes.map((at) => (
+                <option key={at.id} value={at.id}>
+                  {at.name}
+                </option>
+              ))}
+            </select>
+          </div>
+          <div>
+            <label style={labelStyle}>Zuständigkeit</label>
+            <select
+              style={selectStyle}
+              value={ownerId}
+              onChange={(e) => setOwnerId(e.target.value)}
+            >
+              <option value="">— Kein Owner —</option>
+              {tenantUsers.map((u) => {
+                const label = [u.firstName, u.lastName].filter(Boolean).join(' ') || u.email;
+                return (
+                  <option key={u.id} value={u.id}>
+                    {label}
+                  </option>
+                );
+              })}
+            </select>
           </div>
         </div>
 

packages/frontend/src/crm/companies/CompanyRelationshipsCard.tsx

@@ -0,0 +1,311 @@
+import { useState } from 'react';
+import { useNavigate } from 'react-router-dom';
+import { Modal } from '../../components/Modal';
+import {
+  useCompanyRelationships,
+  useCreateCompanyRelationship,
+  useDeleteCompanyRelationship,
+  useRelationshipTypes,
+  useCompanies,
+} from '../hooks';
+import type { CompanyRelationship } from '../types';
+import styles from './CompanyDetailPage.module.css';
+
+// ============================================================
+//  Props
+// ============================================================
+
+interface CompanyRelationshipsCardProps {
+  companyId: string;
+}
+
+// ============================================================
+//  Component
+// ============================================================
+
+export function CompanyRelationshipsCard({ companyId }: CompanyRelationshipsCardProps) {
+  const navigate = useNavigate();
+  const { data, isLoading } = useCompanyRelationships(companyId);
+  const deleteMut = useDeleteCompanyRelationship();
+
+  const [isAddOpen, setAddOpen] = useState(false);
+
+  const relationships: CompanyRelationship[] = data?.data ?? [];
+
+  const handleDelete = (relId: string) => {
+    if (window.confirm('Beziehung wirklich entfernen?')) {
+      deleteMut.mutate({ companyId, relationshipId: relId });
+    }
+  };
+
+  return (
+    <div className={styles.card}>
+      <div className={styles.cardTitleRow}>
+        <h2 className={styles.cardTitle} style={{ marginBottom: 0 }}>
+          Beziehungen ({relationships.length})
+        </h2>
+        <button className={styles.smallAddBtn} onClick={() => setAddOpen(true)}>
+          + Neu
+        </button>
+      </div>
+
+      {isLoading ? (
+        <p style={{ color: 'var(--color-text-muted)', fontSize: '0.8125rem' }}>
+          Laden...
+        </p>
+      ) : relationships.length === 0 ? (
+        <p style={{ color: 'var(--color-text-muted)', fontSize: '0.8125rem' }}>
+          Keine Beziehungen vorhanden
+        </p>
+      ) : (
+        <div>
+          {relationships.map((rel) => (
+            <div key={rel.id} className={styles.relationItem}>
+              <div className={styles.relationInfo}>
+                <span
+                  className={styles.relationName}
+                  onClick={() =>
+                    navigate(`/crm/companies/${rel.relatedCompany.id}`)
+                  }
+                >
+                  {rel.relatedCompany.name}
+                </span>
+                <div style={{ display: 'flex', alignItems: 'center', gap: '0.375rem' }}>
+                  <span className={styles.relationTypeBadge}>
+                    {rel.relationshipType.name}
+                  </span>
+                  {rel.direction === 'incoming' && (
+                    <span
+                      style={{
+                        fontSize: '0.6875rem',
+                        color: 'var(--color-text-muted)',
+                      }}
+                    >
+                      (eingehend)
+                    </span>
+                  )}
+                </div>
+              </div>
+              <button
+                className={styles.relationDeleteBtn}
+                onClick={() => handleDelete(rel.id)}
+                title="Entfernen"
+              >
+                <svg
+                  width="12"
+                  height="12"
+                  viewBox="0 0 12 12"
+                  fill="none"
+                  stroke="currentColor"
+                  strokeWidth="1.5"
+                  strokeLinecap="round"
+                >
+                  <path d="M3 3l6 6M9 3l-6 6" />
+                </svg>
+              </button>
+            </div>
+          ))}
+        </div>
+      )}
+
+      {/* Add Modal */}
+      <AddRelationshipModal
+        isOpen={isAddOpen}
+        onClose={() => setAddOpen(false)}
+        companyId={companyId}
+      />
+    </div>
+  );
+}
+
+// ============================================================
+//  Add Relationship Modal
+// ============================================================
+
+interface AddRelationshipModalProps {
+  isOpen: boolean;
+  onClose: () => void;
+  companyId: string;
+}
+
+const labelStyle: React.CSSProperties = {
+  fontSize: '0.875rem',
+  fontWeight: 500,
+  color: 'var(--color-text)',
+  marginBottom: '0.25rem',
+  display: 'block',
+};
+
+const selectStyle: React.CSSProperties = {
+  width: '100%',
+  padding: '0.625rem 0.75rem',
+  border: '1px solid var(--color-border)',
+  borderRadius: 'var(--radius-sm)',
+  fontSize: '0.9375rem',
+  outline: 'none',
+  boxSizing: 'border-box',
+  background: 'var(--color-bg-card)',
+  color: 'var(--color-text)',
+  cursor: 'pointer',
+};
+
+function AddRelationshipModal({ isOpen, onClose, companyId }: AddRelationshipModalProps) {
+  const createMut = useCreateCompanyRelationship();
+  const { data: typesData } = useRelationshipTypes();
+  const { data: companiesData } = useCompanies({ page: 1, pageSize: 200 });
+
+  const types = typesData?.data ?? [];
+  const companies = (companiesData?.data ?? []).filter((c) => c.id !== companyId);
+
+  const [relatedCompanyId, setRelatedCompanyId] = useState('');
+  const [relationshipTypeId, setRelationshipTypeId] = useState('');
+  const [notes, setNotes] = useState('');
+  const [error, setError] = useState('');
+
+  const handleSubmit = (e: React.FormEvent) => {
+    e.preventDefault();
+    setError('');
+
+    if (!relatedCompanyId || !relationshipTypeId) {
+      setError('Bitte wähle ein Unternehmen und einen Beziehungstyp.');
+      return;
+    }
+
+    createMut.mutate(
+      {
+        companyId,
+        data: {
+          relatedCompanyId,
+          relationshipTypeId,
+          ...(notes.trim() ? { notes: notes.trim() } : {}),
+        },
+      },
+      {
+        onSuccess: () => {
+          setRelatedCompanyId('');
+          setRelationshipTypeId('');
+          setNotes('');
+          onClose();
+        },
+        onError: (err: unknown) => {
+          const msg =
+            (err as { response?: { data?: { error?: { message?: string } } } })
+              ?.response?.data?.error?.message ?? 'Fehler beim Erstellen';
+          setError(msg);
+        },
+      },
+    );
+  };
+
+  return (
+    <Modal
+      isOpen={isOpen}
+      onClose={onClose}
+      title="Beziehung hinzufügen"
+      maxWidth="460px"
+    >
+      <form onSubmit={handleSubmit}>
+        {error && (
+          <div
+            style={{
+              padding: '0.75rem',
+              background: '#fef2f2',
+              border: '1px solid #fecaca',
+              borderRadius: 'var(--radius-sm)',
+              color: 'var(--color-error)',
+              fontSize: '0.875rem',
+              marginBottom: '1rem',
+            }}
+          >
+            {error}
+          </div>
+        )}
+
+        <div style={{ marginBottom: '1rem' }}>
+          <label style={labelStyle}>Unternehmen *</label>
+          <select
+            style={selectStyle}
+            value={relatedCompanyId}
+            onChange={(e) => setRelatedCompanyId(e.target.value)}
+            required
+          >
+            <option value="">— Unternehmen wählen —</option>
+            {companies.map((c) => (
+              <option key={c.id} value={c.id}>
+                {c.name}
+              </option>
+            ))}
+          </select>
+        </div>
+
+        <div style={{ marginBottom: '1rem' }}>
+          <label style={labelStyle}>Beziehungstyp *</label>
+          <select
+            style={selectStyle}
+            value={relationshipTypeId}
+            onChange={(e) => setRelationshipTypeId(e.target.value)}
+            required
+          >
+            <option value="">— Typ wählen —</option>
+            {types.map((t) => (
+              <option key={t.id} value={t.id}>
+                {t.name}
+              </option>
+            ))}
+          </select>
+        </div>
+
+        <div style={{ marginBottom: '1.5rem' }}>
+          <label style={labelStyle}>Notizen</label>
+          <textarea
+            style={{
+              ...selectStyle,
+              cursor: 'text',
+              minHeight: 60,
+              resize: 'vertical',
+            }}
+            value={notes}
+            onChange={(e) => setNotes(e.target.value)}
+            placeholder="Optionale Notizen..."
+          />
+        </div>
+
+        <div style={{ display: 'flex', justifyContent: 'flex-end', gap: '0.75rem' }}>
+          <button
+            type="button"
+            onClick={onClose}
+            disabled={createMut.isPending}
+            style={{
+              padding: '0.5rem 1rem',
+              background: 'transparent',
+              border: '1px solid var(--color-border)',
+              borderRadius: 'var(--radius-sm)',
+              fontSize: '0.875rem',
+              cursor: 'pointer',
+              color: 'var(--color-text-secondary)',
+            }}
+          >
+            Abbrechen
+          </button>
+          <button
+            type="submit"
+            disabled={createMut.isPending}
+            style={{
+              padding: '0.5rem 1rem',
+              background: 'var(--color-primary)',
+              color: 'white',
+              border: 'none',
+              borderRadius: 'var(--radius-sm)',
+              fontSize: '0.875rem',
+              fontWeight: 600,
+              cursor: createMut.isPending ? 'wait' : 'pointer',
+              opacity: createMut.isPending ? 0.7 : 1,
+            }}
+          >
+            {createMut.isPending ? 'Erstellen...' : 'Erstellen'}
+          </button>
+        </div>
+      </form>
+    </Modal>
+  );
+}

packages/frontend/src/crm/companies/ContractsCard.tsx

@@ -0,0 +1,17 @@
+import styles from './CompanyDetailPage.module.css';
+
+interface ContractsCardProps {
+  companyId: string;
+  contractCount?: number;
+}
+
+export function ContractsCard({ contractCount = 0 }: ContractsCardProps) {
+  return (
+    <div className={`${styles.card} ${styles.placeholderCard}`}>
+      <h2 className={styles.cardTitle}>
+        Verträge{contractCount > 0 ? ` (${contractCount})` : ''}
+      </h2>
+      <p>Modul in Entwicklung – bald verfügbar.</p>
+    </div>
+  );
+}

packages/frontend/src/crm/deals/DealsPage.tsx

@@ -213,8 +213,8 @@ export function DealsPage() {
               <th style={thStyle}>Kontakt</th>
               <th style={thStyle}>Unternehmen</th>
               <th style={thStyle}>Pipeline</th>
-              <th style={thStyle}>Stage</th>
+              <th style={{ ...thStyle, minWidth: 120 }}>Stage</th>
-              <th style={{ ...thStyle, textAlign: 'right' }}>Wert</th>
+              <th style={{ ...thStyle, textAlign: 'right', minWidth: 100 }}>Wert</th>
               <th style={thStyle}>Status</th>
               <th style={thStyle}>Aktionen</th>
             </tr>

packages/frontend/src/crm/hooks.ts

@@ -9,6 +9,11 @@ import {
   pipelinesApi,
   activitiesApi,
   companiesApi,
+  industriesApi,
+  accountTypesApi,
+  relationshipTypesApi,
+  companyRelationshipsApi,
+  usersApi,
   lexwareContactsApi,
   lexwareVouchersApi,
 } from './api';
@@ -29,6 +34,13 @@ import type {
   CompaniesQueryParams,
   CreateCompanyPayload,
   UpdateCompanyPayload,
+  CreateIndustryPayload,
+  UpdateIndustryPayload,
+  CreateAccountTypePayload,
+  UpdateAccountTypePayload,
+  CreateRelationshipTypePayload,
+  UpdateRelationshipTypePayload,
+  CreateCompanyRelationshipPayload,
   LexwareContactSearchParams,
   LexwareVouchersQueryParams,
 } from './types';
@@ -65,6 +77,27 @@ export const crmKeys = {
       ['crm', 'companies', 'list', params] as const,
     detail: (id: string) => ['crm', 'companies', 'detail', id] as const,
   },
+  industries: {
+    all: ['crm', 'industries'] as const,
+    list: () => ['crm', 'industries', 'list'] as const,
+  },
+  accountTypes: {
+    all: ['crm', 'accountTypes'] as const,
+    list: () => ['crm', 'accountTypes', 'list'] as const,
+  },
+  relationshipTypes: {
+    all: ['crm', 'relationshipTypes'] as const,
+    list: () => ['crm', 'relationshipTypes', 'list'] as const,
+  },
+  companyRelationships: {
+    all: ['crm', 'companyRelationships'] as const,
+    list: (companyId: string) =>
+      ['crm', 'companyRelationships', 'list', companyId] as const,
+  },
+  users: {
+    all: ['crm', 'users'] as const,
+    list: () => ['crm', 'users', 'list'] as const,
+  },
   lexware: {
     all: ['crm', 'lexware'] as const,
     contactSearch: (params: LexwareContactSearchParams) =>
@@ -392,6 +425,226 @@ export function useDeleteCompany() {
   });
 }
 
+// ============================================================
+//  Industries
+// ============================================================
+
+export function useIndustries() {
+  return useQuery({
+    queryKey: crmKeys.industries.list(),
+    queryFn: () => industriesApi.list(),
+    staleTime: 10 * 60 * 1000,
+  });
+}
+
+export function useCreateIndustry() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: (data: CreateIndustryPayload) => industriesApi.create(data),
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: crmKeys.industries.all });
+    },
+  });
+}
+
+export function useUpdateIndustry() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: ({ id, data }: { id: string; data: UpdateIndustryPayload }) =>
+      industriesApi.update(id, data),
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: crmKeys.industries.all });
+    },
+  });
+}
+
+export function useDeleteIndustry() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: (id: string) => industriesApi.delete(id),
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: crmKeys.industries.all });
+    },
+  });
+}
+
+// ============================================================
+//  Account Types
+// ============================================================
+
+export function useAccountTypes() {
+  return useQuery({
+    queryKey: crmKeys.accountTypes.list(),
+    queryFn: () => accountTypesApi.list(),
+    staleTime: 10 * 60 * 1000,
+  });
+}
+
+export function useCreateAccountType() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: (data: CreateAccountTypePayload) =>
+      accountTypesApi.create(data),
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: crmKeys.accountTypes.all });
+    },
+  });
+}
+
+export function useUpdateAccountType() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: ({
+      id,
+      data,
+    }: {
+      id: string;
+      data: UpdateAccountTypePayload;
+    }) => accountTypesApi.update(id, data),
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: crmKeys.accountTypes.all });
+    },
+  });
+}
+
+export function useDeleteAccountType() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: (id: string) => accountTypesApi.delete(id),
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: crmKeys.accountTypes.all });
+    },
+  });
+}
+
+// ============================================================
+//  Relationship Types
+// ============================================================
+
+export function useRelationshipTypes() {
+  return useQuery({
+    queryKey: crmKeys.relationshipTypes.list(),
+    queryFn: () => relationshipTypesApi.list(),
+    staleTime: 10 * 60 * 1000,
+  });
+}
+
+export function useCreateRelationshipType() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: (data: CreateRelationshipTypePayload) =>
+      relationshipTypesApi.create(data),
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: crmKeys.relationshipTypes.all });
+    },
+  });
+}
+
+export function useUpdateRelationshipType() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: ({
+      id,
+      data,
+    }: {
+      id: string;
+      data: UpdateRelationshipTypePayload;
+    }) => relationshipTypesApi.update(id, data),
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: crmKeys.relationshipTypes.all });
+    },
+  });
+}
+
+export function useDeleteRelationshipType() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: (id: string) => relationshipTypesApi.delete(id),
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: crmKeys.relationshipTypes.all });
+    },
+  });
+}
+
+// ============================================================
+//  Company Relationships
+// ============================================================
+
+export function useCompanyRelationships(companyId: string) {
+  return useQuery({
+    queryKey: crmKeys.companyRelationships.list(companyId),
+    queryFn: () => companyRelationshipsApi.list(companyId),
+    enabled: !!companyId,
+  });
+}
+
+export function useCreateCompanyRelationship() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: ({
+      companyId,
+      data,
+    }: {
+      companyId: string;
+      data: CreateCompanyRelationshipPayload;
+    }) => companyRelationshipsApi.create(companyId, data),
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: crmKeys.companyRelationships.all });
+      qc.invalidateQueries({ queryKey: crmKeys.companies.all });
+    },
+  });
+}
+
+export function useDeleteCompanyRelationship() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: ({
+      companyId,
+      relationshipId,
+    }: {
+      companyId: string;
+      relationshipId: string;
+    }) => companyRelationshipsApi.delete(companyId, relationshipId),
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: crmKeys.companyRelationships.all });
+      qc.invalidateQueries({ queryKey: crmKeys.companies.all });
+    },
+  });
+}
+
+// ============================================================
+//  Tenant Users
+// ============================================================
+
+export function useTenantUsers() {
+  return useQuery({
+    queryKey: crmKeys.users.list(),
+    queryFn: () => usersApi.list(),
+    staleTime: 10 * 60 * 1000,
+  });
+}
+
+// ============================================================
+//  Company Activities (Aggregated Feed)
+// ============================================================
+
+export function useCompanyActivities(
+  companyId: string,
+  params: Omit<ActivitiesQueryParams, 'companyId' | 'includeContacts'> = {},
+) {
+  const fullParams: ActivitiesQueryParams = {
+    ...params,
+    companyId,
+    includeContacts: true,
+    pageSize: params.pageSize ?? 50,
+  };
+  return useQuery({
+    queryKey: crmKeys.activities.list(fullParams),
+    queryFn: () => activitiesApi.list(fullParams),
+    enabled: !!companyId,
+  });
+}
+
 // ============================================================
 //  Lexware Office — Contacts
 // ============================================================

packages/frontend/src/crm/types.ts

@@ -7,6 +7,113 @@
 export type ContactType = 'PERSON' | 'ORGANIZATION';
 export type DealStatus = 'OPEN' | 'WON' | 'LOST';
 export type ActivityType = 'NOTE' | 'CALL' | 'EMAIL' | 'MEETING' | 'TASK';
+export type ContractStatus = 'DRAFT' | 'ACTIVE' | 'EXPIRED' | 'CANCELLED';
+
+// --- Admin-konfigurierbare Entitaeten ---
+
+export interface Industry {
+  id: string;
+  tenantId: string;
+  name: string;
+  color: string;
+  sortOrder: number;
+  createdAt: string;
+  updatedAt: string;
+  _count?: { companies: number };
+}
+
+export interface AccountType {
+  id: string;
+  tenantId: string;
+  name: string;
+  sortOrder: number;
+  createdAt: string;
+  updatedAt: string;
+  _count?: { companies: number };
+}
+
+export interface RelationshipType {
+  id: string;
+  tenantId: string;
+  name: string;
+  sortOrder: number;
+  createdAt: string;
+  updatedAt: string;
+  _count?: { relationships: number };
+}
+
+export interface CompanyRelationship {
+  id: string;
+  tenantId: string;
+  companyId: string;
+  relatedCompanyId: string;
+  relationshipTypeId: string;
+  notes: string | null;
+  createdBy: string;
+  createdAt: string;
+  relatedCompany: {
+    id: string;
+    name: string;
+    industry: string | null;
+    city: string | null;
+  };
+  relationshipType: {
+    id: string;
+    name: string;
+  };
+  direction?: 'outgoing' | 'incoming';
+}
+
+export interface Contract {
+  id: string;
+  tenantId: string;
+  companyId: string;
+  title: string;
+  status: ContractStatus;
+  startDate: string | null;
+  endDate: string | null;
+  value: string | null;
+  currency: string;
+  notes: string | null;
+  createdBy: string;
+  createdAt: string;
+  updatedAt: string;
+}
+
+export interface TenantUser {
+  id: string;
+  firstName: string | null;
+  lastName: string | null;
+  email: string;
+}
+
+export interface CreateIndustryPayload {
+  name: string;
+  color?: string;
+  sortOrder?: number;
+}
+
+export type UpdateIndustryPayload = Partial<CreateIndustryPayload>;
+
+export interface CreateAccountTypePayload {
+  name: string;
+  sortOrder?: number;
+}
+
+export type UpdateAccountTypePayload = Partial<CreateAccountTypePayload>;
+
+export interface CreateRelationshipTypePayload {
+  name: string;
+  sortOrder?: number;
+}
+
+export type UpdateRelationshipTypePayload = Partial<CreateRelationshipTypePayload>;
+
+export interface CreateCompanyRelationshipPayload {
+  relatedCompanyId: string;
+  relationshipTypeId: string;
+  notes?: string;
+}
 
 // --- Contact ---
 
@@ -76,7 +183,8 @@ export type UpdateContactPayload = Partial<CreateContactPayload>;
 export interface Activity {
   id: string;
   tenantId: string;
-  contactId: string;
+  contactId: string | null;
+  companyId: string | null;
   type: ActivityType;
   subject: string;
   description: string | null;
@@ -91,11 +199,16 @@ export interface Activity {
     firstName: string | null;
     lastName: string | null;
     companyName: string | null;
-  };
+  } | null;
+  company?: {
+    id: string;
+    name: string;
+  } | null;
 }
 
 export interface CreateActivityPayload {
-  contactId: string;
+  contactId?: string;
+  companyId?: string;
   type: ActivityType;
   subject: string;
   description?: string;
@@ -103,7 +216,7 @@ export interface CreateActivityPayload {
   completedAt?: string;
 }
 
-export type UpdateActivityPayload = Partial<Omit<CreateActivityPayload, 'contactId'>>;
+export type UpdateActivityPayload = Partial<Omit<CreateActivityPayload, 'contactId' | 'companyId'>>;
 
 // --- Pipeline + Stage ---
 
@@ -208,6 +321,10 @@ export interface Company {
   tenantId: string;
   name: string;
   industry: string | null;
+  industryId: string | null;
+  accountTypeId: string | null;
+  ownerId: string | null;
+  ownerName: string | null;
   email: string | null;
   phone: string | null;
   website: string | null;
@@ -226,7 +343,9 @@ export interface Company {
   lexwareContactId: string | null;
   lexwareContactVersion: number | null;
   lexwareSyncedAt: string | null;
-  _count?: { contacts: number; deals: number; lexwareVouchers?: number };
+  industryRef?: Industry | null;
+  accountType?: AccountType | null;
+  _count?: { contacts: number; deals: number; lexwareVouchers?: number; contracts?: number };
   contacts?: {
     id: string;
     firstName: string | null;
@@ -237,11 +356,18 @@ export interface Company {
     isActive: boolean;
   }[];
   deals?: Deal[];
+  relationships?: CompanyRelationship[];
+  relatedRelationships?: CompanyRelationship[];
+  contracts?: Contract[];
 }
 
 export interface CreateCompanyPayload {
   name: string;
   industry?: string;
+  industryId?: string;
+  accountTypeId?: string;
+  ownerId?: string;
+  ownerName?: string;
   email?: string;
   phone?: string;
   website?: string;
@@ -307,6 +433,8 @@ export interface ActivitiesQueryParams {
   page?: number;
   pageSize?: number;
   contactId?: string;
+  companyId?: string;
+  includeContacts?: boolean;
   type?: ActivityType;
   sort?: string;
   order?: 'asc' | 'desc';