From 7e55a336f244956941ab7069e894c6ebc1390da8 Mon Sep 17 00:00:00 2001
From: Denis Lugowski <denis.lugowski@gmail.com>
Date: Sat, 9 Aug 2025 10:09:00 +0200
Subject: [PATCH] feat(fullstack): Add notifications, user is now an entity,
 add testcontainers, rework custom permissions, get user from JWT in endpoints

---
 .run/local-server-backend-h2.run.xml          |   2 +-
 .../api/legalconsenthub.yml                   | 303 ++++++++++++++++--
 legalconsenthub-backend/build.gradle          |  11 +
 .../application_form/ApplicationForm.kt       |  20 +-
 .../application_form/ApplicationFormMapper.kt |  18 +-
 .../ApplicationFormService.kt                 |  58 +++-
 .../legalconsenthub/comment/Comment.kt        |  10 +-
 .../legalconsenthub/comment/CommentMapper.kt  |   6 +-
 .../legalconsenthub/config/SecurityConfig.kt  |   3 +
 .../config/TestContainersConfig.kt            |  40 +++
 .../legalconsenthub/error/ExceptionHandler.kt |  18 +-
 .../error/UserAlreadyExistsException.kt       |   3 +
 .../error/UserNotFoundException.kt            |   3 +
 .../notification/Notification.kt              |  52 +++
 .../notification/NotificationController.kt    | 102 ++++++
 .../notification/NotificationMapper.kt        |  38 +++
 .../notification/NotificationRepository.kt    |  47 +++
 .../notification/NotificationService.kt       |  87 +++++
 .../notification/PagedNotificationMapper.kt   |  25 ++
 .../legalconsenthub/user/User.kt              |  34 +-
 .../legalconsenthub/user/UserController.kt    |  29 ++
 .../legalconsenthub/user/UserMapper.kt        |   4 +
 .../legalconsenthub/user/UserRepository.kt    |   7 +
 .../legalconsenthub/user/UserService.kt       |  46 +++
 ...tion-local-h2.yaml => application-h2.yaml} |   0
 .../resources/application-testcontainers.yaml |  35 ++
 .../resources/db/migrations/001-schema.sql    |  76 ++++-
 ....998Z.sql => 2025-08-07T06-04-32.922Z.sql} |   0
 .../components/NotificationsSlideover.vue     |  89 +++++
 legalconsenthub/composables/index.ts          |   4 +
 .../notification/useNotification.ts           | 118 +++++++
 .../notification/useNotificationApi.ts        |  55 ++++
 legalconsenthub/composables/useAuth.ts        |   4 +-
 legalconsenthub/composables/usePermissions.ts |  12 +-
 legalconsenthub/composables/user/useUser.ts   |  58 ++++
 .../composables/user/useUserApi.ts            |  39 +++
 legalconsenthub/layouts/default.vue           |  15 +
 legalconsenthub/package.json                  |   6 +-
 legalconsenthub/pages/index.vue               |  22 +-
 legalconsenthub/pages/signup.vue              |  24 +-
 legalconsenthub/pnpm-lock.yaml                |  41 ++-
 legalconsenthub/server/utils/auth.ts          |  44 ++-
 legalconsenthub/server/utils/permissions.ts   | 100 ++++--
 testdata.json                                 |   2 -
 44 files changed, 1571 insertions(+), 139 deletions(-)
 create mode 100644 legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/config/TestContainersConfig.kt
 create mode 100644 legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/error/UserAlreadyExistsException.kt
 create mode 100644 legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/error/UserNotFoundException.kt
 create mode 100644 legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/Notification.kt
 create mode 100644 legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/NotificationController.kt
 create mode 100644 legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/NotificationMapper.kt
 create mode 100644 legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/NotificationRepository.kt
 create mode 100644 legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/NotificationService.kt
 create mode 100644 legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/PagedNotificationMapper.kt
 create mode 100644 legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/UserController.kt
 create mode 100644 legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/UserRepository.kt
 create mode 100644 legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/UserService.kt
 rename legalconsenthub-backend/src/main/resources/{application-local-h2.yaml => application-h2.yaml} (100%)
 create mode 100644 legalconsenthub-backend/src/main/resources/application-testcontainers.yaml
 rename legalconsenthub/better-auth_migrations/{2025-05-29T08-34-09.998Z.sql => 2025-08-07T06-04-32.922Z.sql} (100%)
 create mode 100644 legalconsenthub/components/NotificationsSlideover.vue
 create mode 100644 legalconsenthub/composables/notification/useNotification.ts
 create mode 100644 legalconsenthub/composables/notification/useNotificationApi.ts
 create mode 100644 legalconsenthub/composables/user/useUser.ts
 create mode 100644 legalconsenthub/composables/user/useUserApi.ts

diff --git a/.run/local-server-backend-h2.run.xml b/.run/local-server-backend-h2.run.xml
index 0a60a7a..ff394c8 100644
--- a/.run/local-server-backend-h2.run.xml
+++ b/.run/local-server-backend-h2.run.xml
@@ -1,6 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="local-server-backend-h2" type="SpringBootApplicationConfigurationType" factoryName="Spring Boot">
-    <option name="ACTIVE_PROFILES" value="local-h2" />
+    <option name="ACTIVE_PROFILES" value="h2" />
     <option name="ALTERNATIVE_JRE_PATH" value="ms-21" />
     <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="true" />
     <module name="com.betriebsratkanzlei.legalconsenthub.main" />
diff --git a/legalconsenthub-backend/api/legalconsenthub.yml b/legalconsenthub-backend/api/legalconsenthub.yml
index 73d0be3..8ba9b2b 100644
--- a/legalconsenthub-backend/api/legalconsenthub.yml
+++ b/legalconsenthub-backend/api/legalconsenthub.yml
@@ -339,6 +339,34 @@ paths:
           $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/ServiceUnavailable"
 
   ####### Users #######
+  /users:
+    post:
+      summary: Create a new user
+      operationId: createUser
+      tags:
+        - user
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/CreateUserDto"
+      responses:
+        "201":
+          description: User successfully created
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/UserDto"
+        "400":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/BadRequest"
+        "401":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/Unauthorized"
+        "500":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/ServerError"
+        "503":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/ServiceUnavailable"
+
   /users/{id}:
     parameters:
       - name: id
@@ -346,7 +374,6 @@ paths:
         required: true
         schema:
           type: string
-          format: uuid
     get:
       summary: Get a specific user
       operationId: getUserById
@@ -602,6 +629,142 @@ paths:
         "503":
           $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/ServiceUnavailable"
 
+  ####### Notifications #######
+  /notifications:
+    get:
+      summary: Get notifications for the current user
+      operationId: getNotifications
+      tags:
+        - notification
+      parameters:
+        - in: query
+          name: page
+          schema:
+            type: integer
+            default: 0
+          description: Page number
+        - in: query
+          name: size
+          schema:
+            type: integer
+            default: 20
+          description: Page size
+      responses:
+        "200":
+          description: Paged list of notifications
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/PagedNotificationDto"
+        "401":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/Unauthorized"
+        "500":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/ServerError"
+    post:
+      summary: Create a new notification
+      operationId: createNotification
+      tags:
+        - notification
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/CreateNotificationDto"
+      responses:
+        "201":
+          description: Successfully created notification
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/NotificationDto"
+        "400":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/BadRequest"
+        "401":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/Unauthorized"
+        "500":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/ServerError"
+
+  /notifications/unread:
+    get:
+      summary: Get unread notifications for the current user
+      operationId: getUnreadNotifications
+      tags:
+        - notification
+      responses:
+        "200":
+          description: List of unread notifications
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: "#/components/schemas/NotificationDto"
+        "401":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/Unauthorized"
+        "500":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/ServerError"
+
+  /notifications/unread/count:
+    get:
+      summary: Get count of unread notifications for the current user
+      operationId: getUnreadNotificationCount
+      tags:
+        - notification
+      responses:
+        "200":
+          description: Count of unread notifications
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int64
+        "401":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/Unauthorized"
+        "500":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/ServerError"
+
+  /notifications/mark-all-read:
+    put:
+      summary: Mark all notifications as read for the current user
+      operationId: markAllNotificationsAsRead
+      tags:
+        - notification
+      responses:
+        "204":
+          description: All notifications marked as read
+        "401":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/Unauthorized"
+        "500":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/ServerError"
+
+  /notifications/{id}/mark-read:
+    parameters:
+      - name: id
+        in: path
+        required: true
+        schema:
+          type: string
+          format: uuid
+    put:
+      summary: Mark a specific notification as read
+      operationId: markNotificationAsRead
+      tags:
+        - notification
+      responses:
+        "200":
+          description: Notification marked as read
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/NotificationDto"
+        "404":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/NotFound"
+        "401":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/Unauthorized"
+        "500":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/ServerError"
+
   ####### Files #######
   /files:
     get:
@@ -751,7 +914,6 @@ components:
           type: string
         status:
           $ref: "#/components/schemas/ApplicationFormStatus"
-          default: DRAFT
 
     PagedApplicationFormDto:
       type: object
@@ -886,11 +1048,51 @@ components:
       required:
         - id
         - name
+        - status
       properties:
         id:
           type: string
         name:
           type: string
+        status:
+          $ref: "#/components/schemas/UserStatus"
+        role:
+          $ref: "#/components/schemas/UserRole"
+
+    CreateUserDto:
+      type: object
+      required:
+        - id
+        - name
+        - status
+        - role
+      properties:
+        id:
+          type: string
+        name:
+          type: string
+        status:
+          $ref: "#/components/schemas/UserStatus"
+        role:
+          $ref: "#/components/schemas/UserRole"
+
+    UserStatus:
+      type: string
+      enum:
+        - INVITED
+        - ACTIVE
+        - BLOCKED
+        - SUSPENDED_SUBSCRIPTION
+
+    UserRole:
+      type: string
+      description: "User's role in the organization"
+      enum:
+        - owner
+        - admin
+        - employer
+        - works_council_member
+        - employee
 
     ####### CommentDto #######
     CommentDto:
@@ -968,6 +1170,85 @@ components:
         name:
           type: string
 
+    ####### Notification #######
+    NotificationDto:
+      type: object
+      required:
+        - id
+        - title
+        - message
+        - clickTarget
+        - isRead
+        - targetGroup
+        - type
+        - createdAt
+      properties:
+        id:
+          type: string
+          format: uuid
+        title:
+          type: string
+        message:
+          type: string
+        clickTarget:
+          type: string
+        isRead:
+          type: boolean
+        recipient:
+          nullable: true
+          allOf:
+            - $ref: "#/components/schemas/UserDto"
+        targetGroup:
+          type: string
+        type:
+          $ref: "#/components/schemas/NotificationType"
+        createdAt:
+          type: string
+          format: date-time
+
+    CreateNotificationDto:
+      type: object
+      required:
+        - title
+        - message
+        - clickTarget
+        - targetGroup
+        - type
+      properties:
+        title:
+          type: string
+        message:
+          type: string
+        clickTarget:
+          type: string
+        recipient:
+          nullable: true
+          allOf:
+            - $ref: "#/components/schemas/UserDto"
+        targetGroup:
+          type: string
+        type:
+          $ref: "#/components/schemas/NotificationType"
+
+    PagedNotificationDto:
+      type: object
+      allOf:
+        - $ref: "#/components/schemas/Page"
+      required:
+        - content
+      properties:
+        content:
+          type: array
+          items:
+            $ref: "#/components/schemas/NotificationDto"
+
+    NotificationType:
+      type: string
+      enum:
+        - INFO
+        - WARNING
+        - ERROR
+
     ####### FileDto #######
     FileDto:
       type: object
@@ -1004,24 +1285,6 @@ components:
           type: string
           format: binary
 
-    ####### Notification #######
-    NotificationDto:
-      type: object
-      required:
-        - id
-        - notificationType
-      properties:
-        id:
-          type: string
-          format: uuid
-        notificationType:
-          $ref: "#/components/schemas/NotificationType"
-
-    NotificationType:
-      type: string
-      enum:
-        - EMAIL
-
     ####### Miscellaneous #######
     ProcessingPurpose:
       type: string
diff --git a/legalconsenthub-backend/build.gradle b/legalconsenthub-backend/build.gradle
index 5ca194c..8e153d9 100644
--- a/legalconsenthub-backend/build.gradle
+++ b/legalconsenthub-backend/build.gradle
@@ -24,6 +24,12 @@ ext {
     openHtmlVersion = '1.0.10'
 }
 
+//dependencyManagement {
+//    imports {
+//        mavenBom 'eu.europa.ec.joinup.sd-dss:dss-bom:6.2'
+//    }
+//}
+
 dependencies {
     implementation 'com.fasterxml.jackson.module:jackson-module-kotlin'
     implementation 'org.jetbrains.kotlin:kotlin-reflect'
@@ -42,8 +48,13 @@ dependencies {
     implementation "com.openhtmltopdf:openhtmltopdf-slf4j:$openHtmlVersion"
     implementation "com.openhtmltopdf:openhtmltopdf-svg-support:$openHtmlVersion"
     runtimeOnly 'com.h2database:h2'
+    runtimeOnly 'org.postgresql:postgresql'
+    implementation 'org.springframework.boot:spring-boot-testcontainers'
+    implementation 'org.testcontainers:postgresql'
     testImplementation 'org.jetbrains.kotlin:kotlin-test-junit5'
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
+//    implementation 'eu.europa.ec.joinup.sd-dss:dss-validation'
+//    implementation 'eu.europa.ec.joinup.sd-dss:dss-pades'
     testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
 }
 
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form/ApplicationForm.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form/ApplicationForm.kt
index 5a27f18..fa22b2c 100644
--- a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form/ApplicationForm.kt
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form/ApplicationForm.kt
@@ -3,8 +3,8 @@ package com.betriebsratkanzlei.legalconsenthub.application_form
 import com.betriebsratkanzlei.legalconsenthub.form_element.FormElementSection
 import com.betriebsratkanzlei.legalconsenthub.user.User
 import com.betriebsratkanzlei.legalconsenthub_api.model.ApplicationFormStatus
-import jakarta.persistence.AttributeOverride
-import jakarta.persistence.AttributeOverrides
+import jakarta.persistence.JoinColumn
+import jakarta.persistence.ManyToOne
 import jakarta.persistence.CascadeType
 import jakarta.persistence.Column
 import jakarta.persistence.Entity
@@ -14,7 +14,7 @@ import jakarta.persistence.EnumType
 import jakarta.persistence.GeneratedValue
 import jakarta.persistence.Id
 import jakarta.persistence.OneToMany
-import jakarta.persistence.Embedded
+
 import org.springframework.data.annotation.CreatedDate
 import org.springframework.data.annotation.LastModifiedDate
 import org.springframework.data.jpa.domain.support.AuditingEntityListener
@@ -43,18 +43,12 @@ class ApplicationForm(
     @Column(nullable = false)
     var status: ApplicationFormStatus = ApplicationFormStatus.DRAFT,
 
-    @Embedded
-    @AttributeOverrides(
-        AttributeOverride(name = "id", column = Column(name = "created_by_id", nullable = false)),
-        AttributeOverride(name = "name", column = Column(name = "created_by_name", nullable = false))
-    )
+    @ManyToOne
+    @JoinColumn(name = "created_by_id", nullable = false)
     var createdBy: User,
 
-    @Embedded
-    @AttributeOverrides(
-        AttributeOverride(name = "id", column = Column(name = "last_modified_by_id", nullable = false)),
-        AttributeOverride(name = "name", column = Column(name = "last_modified_by_name", nullable = false))
-    )
+    @ManyToOne
+    @JoinColumn(name = "last_modified_by_id", nullable = false)
     var lastModifiedBy: User,
 
     @CreatedDate
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form/ApplicationFormMapper.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form/ApplicationFormMapper.kt
index 4c22b95..5c03eb9 100644
--- a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form/ApplicationFormMapper.kt
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form/ApplicationFormMapper.kt
@@ -1,17 +1,20 @@
 package com.betriebsratkanzlei.legalconsenthub.application_form
 
 import com.betriebsratkanzlei.legalconsenthub.form_element.FormElementSectionMapper
-import com.betriebsratkanzlei.legalconsenthub.security.CustomJwtTokenPrincipal
 import com.betriebsratkanzlei.legalconsenthub.user.User
 import com.betriebsratkanzlei.legalconsenthub.user.UserMapper
+import com.betriebsratkanzlei.legalconsenthub.user.UserService
 import com.betriebsratkanzlei.legalconsenthub_api.model.ApplicationFormDto
 import com.betriebsratkanzlei.legalconsenthub_api.model.CreateApplicationFormDto
-import org.springframework.security.core.context.SecurityContextHolder
 import org.springframework.stereotype.Component
 import java.time.LocalDateTime
 
 @Component
-class ApplicationFormMapper(private val formElementSectionMapper: FormElementSectionMapper, private val userMapper: UserMapper) {
+class ApplicationFormMapper(
+    private val formElementSectionMapper: FormElementSectionMapper, 
+    private val userMapper: UserMapper,
+    private val userService: UserService
+) {
     fun toApplicationFormDto(applicationForm: ApplicationForm): ApplicationFormDto {
         return ApplicationFormDto(
             id = applicationForm.id ?: throw IllegalStateException("ApplicationForm ID must not be null!"),
@@ -43,18 +46,15 @@ class ApplicationFormMapper(private val formElementSectionMapper: FormElementSec
     }
 
     fun toApplicationForm(createApplicationFormDto: CreateApplicationFormDto): ApplicationForm {
-        // TODO: Move this in upper layer
-        val principal = SecurityContextHolder.getContext().authentication.principal as CustomJwtTokenPrincipal
-        val createdBy = User(principal.name ?: "UNKNOWN USER", principal.id ?: "")
-        val lastModifiedBy = User(principal.name ?: "UNKNOWN USER", principal.id ?: "")
+        val currentUser = userService.getCurrentUser()
 
         val applicationForm = ApplicationForm(
             name = createApplicationFormDto.name,
             isTemplate = createApplicationFormDto.isTemplate,
             organizationId = createApplicationFormDto.organizationId ?: "",
             status = createApplicationFormDto.status ?: com.betriebsratkanzlei.legalconsenthub_api.model.ApplicationFormStatus.DRAFT,
-            createdBy = createdBy,
-            lastModifiedBy = lastModifiedBy,
+            createdBy = currentUser,
+            lastModifiedBy = currentUser,
         )
         applicationForm.formElementSections = createApplicationFormDto.formElementSections
             .map { formElementSectionMapper.toFormElementSection(it, applicationForm) }
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form/ApplicationFormService.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form/ApplicationFormService.kt
index 187acd1..6ad4d86 100644
--- a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form/ApplicationFormService.kt
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form/ApplicationFormService.kt
@@ -5,9 +5,11 @@ import com.betriebsratkanzlei.legalconsenthub.error.ApplicationFormNotCreatedExc
 import com.betriebsratkanzlei.legalconsenthub.error.ApplicationFormNotDeletedException
 import com.betriebsratkanzlei.legalconsenthub.error.ApplicationFormNotFoundException
 import com.betriebsratkanzlei.legalconsenthub.error.ApplicationFormNotUpdatedException
+import com.betriebsratkanzlei.legalconsenthub.notification.NotificationService
 import com.betriebsratkanzlei.legalconsenthub_api.model.ApplicationFormDto
 import com.betriebsratkanzlei.legalconsenthub_api.model.ApplicationFormStatus
 import com.betriebsratkanzlei.legalconsenthub_api.model.CreateApplicationFormDto
+import com.betriebsratkanzlei.legalconsenthub_api.model.NotificationType
 import org.springframework.data.domain.Page
 import org.springframework.data.domain.PageRequest
 import org.springframework.stereotype.Service
@@ -16,7 +18,8 @@ import java.util.UUID
 @Service
 class ApplicationFormService(
     private val applicationFormRepository: ApplicationFormRepository,
-    private val applicationFormMapper: ApplicationFormMapper
+    private val applicationFormMapper: ApplicationFormMapper,
+    private val notificationService: NotificationService
 ) {
 
     fun createApplicationForm(createApplicationFormDto: CreateApplicationFormDto): ApplicationForm {
@@ -76,10 +79,61 @@ class ApplicationFormService(
 
         applicationForm.status = ApplicationFormStatus.SUBMITTED
 
-        return try {
+        val savedApplicationForm = try {
             applicationFormRepository.save(applicationForm)
         } catch (e: Exception) {
             throw ApplicationFormNotUpdatedException(e, id)
         }
+
+        // Create notifications for relevant users
+        createSubmissionNotifications(savedApplicationForm)
+
+        return savedApplicationForm
+    }
+
+    private fun createSubmissionNotifications(applicationForm: ApplicationForm) {
+        val title = "Neuer Mitbestimmungsantrag eingereicht"
+        val message = "Ein neuer Mitbestimmungsantrag '${applicationForm.name}' wurde von ${applicationForm.createdBy.name} eingereicht und wartet auf Ihre Bearbeitung."
+        val clickTarget = "/application-forms/${applicationForm.id}/0"
+
+        // Create notification for admin users
+        notificationService.createNotificationForUser(
+            title = title,
+            message = message,
+            clickTarget = clickTarget,
+            recipient = null,
+            targetGroup = "admin",
+            type = NotificationType.INFO
+        )
+
+        // Create notification for works council members
+        notificationService.createNotificationForUser(
+            title = title,
+            message = message,
+            clickTarget = clickTarget,
+            recipient = null,
+            targetGroup = "works_council_member",
+            type = NotificationType.INFO
+        )
+
+        // Create notification for employer
+        notificationService.createNotificationForUser(
+            title = title,
+            message = message,
+            clickTarget = clickTarget,
+            recipient = null,
+            targetGroup = "employer",
+            type = NotificationType.INFO
+        )
+
+        // Create notification for employee
+        notificationService.createNotificationForUser(
+            title = title,
+            message = message,
+            clickTarget = clickTarget,
+            recipient = null,
+            targetGroup = "employee",
+            type = NotificationType.INFO
+        )
     }
 }
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/comment/Comment.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/comment/Comment.kt
index f15e50b..bb8e8bf 100644
--- a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/comment/Comment.kt
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/comment/Comment.kt
@@ -3,10 +3,7 @@ package com.betriebsratkanzlei.legalconsenthub.comment;
 import com.betriebsratkanzlei.legalconsenthub.application_form.ApplicationForm
 import com.betriebsratkanzlei.legalconsenthub.form_element.FormElement
 import com.betriebsratkanzlei.legalconsenthub.user.User
-import jakarta.persistence.AttributeOverride
-import jakarta.persistence.AttributeOverrides
 import jakarta.persistence.Column
-import jakarta.persistence.Embedded
 import jakarta.persistence.Entity
 import jakarta.persistence.EntityListeners
 import jakarta.persistence.GeneratedValue;
@@ -30,11 +27,8 @@ class Comment(
     @Column(nullable = false)
     var message: String = "",
 
-    @Embedded
-    @AttributeOverrides(
-        AttributeOverride(name = "id", column = Column(name = "created_by_id", nullable = false)),
-        AttributeOverride(name = "name", column = Column(name = "created_by_name", nullable = false))
-    )
+    @ManyToOne
+    @JoinColumn(name = "created_by_id", nullable = false)
     var createdBy: User,
 
     @CreatedDate
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/comment/CommentMapper.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/comment/CommentMapper.kt
index 894c612..0ea3a78 100644
--- a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/comment/CommentMapper.kt
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/comment/CommentMapper.kt
@@ -5,6 +5,7 @@ import com.betriebsratkanzlei.legalconsenthub.error.ApplicationFormNotFoundExcep
 import com.betriebsratkanzlei.legalconsenthub.error.FormElementNotFoundException
 import com.betriebsratkanzlei.legalconsenthub.form_element.FormElementRepository
 import com.betriebsratkanzlei.legalconsenthub.user.UserMapper
+import com.betriebsratkanzlei.legalconsenthub.user.UserService
 import com.betriebsratkanzlei.legalconsenthub_api.model.CommentDto
 import com.betriebsratkanzlei.legalconsenthub_api.model.CreateCommentDto
 import org.springframework.stereotype.Component
@@ -14,6 +15,7 @@ import java.util.UUID
 @Component
 class CommentMapper(
     private val userMapper: UserMapper,
+    private val userService: UserService,
     private val applicationFormRepository: ApplicationFormRepository,
     private val formElementRepository: FormElementRepository
 ) {
@@ -53,9 +55,11 @@ class CommentMapper(
         val formElement = formElementRepository.findById(formElementId)
             .orElseThrow { FormElementNotFoundException(formElementId) }
 
+        val currentUser = userService.getCurrentUser()
+
         return Comment(
             message = commentDto.message,
-            createdBy = userMapper.toUser(commentDto.createdBy),
+            createdBy = currentUser,
             applicationForm = applicationForm,
             formElement = formElement
         )
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/config/SecurityConfig.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/config/SecurityConfig.kt
index e6b9246..9cf3f50 100644
--- a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/config/SecurityConfig.kt
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/config/SecurityConfig.kt
@@ -9,6 +9,7 @@ import org.springframework.security.oauth2.jose.jws.SignatureAlgorithm
 import org.springframework.security.oauth2.jwt.JwtDecoder
 import org.springframework.security.oauth2.jwt.NimbusJwtDecoder
 import org.springframework.security.web.SecurityFilterChain
+import org.springframework.http.HttpMethod
 
 @Configuration
 @EnableWebSecurity
@@ -24,6 +25,8 @@ class SecurityConfig {
             authorizeHttpRequests {
                 authorize("/swagger-ui/**", permitAll)
                 authorize("/v3/**", permitAll)
+                // For user registration
+                authorize(HttpMethod.POST, "/users", permitAll)
                 authorize(anyRequest, authenticated)
             }
             oauth2ResourceServer {
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/config/TestContainersConfig.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/config/TestContainersConfig.kt
new file mode 100644
index 0000000..abade63
--- /dev/null
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/config/TestContainersConfig.kt
@@ -0,0 +1,40 @@
+package com.betriebsratkanzlei.legalconsenthub.config
+
+import com.github.dockerjava.api.model.ExposedPort
+import com.github.dockerjava.api.model.HostConfig
+import com.github.dockerjava.api.model.PortBinding
+import com.github.dockerjava.api.model.Ports
+import org.springframework.boot.testcontainers.service.connection.ServiceConnection
+import org.springframework.context.annotation.Bean
+import org.springframework.context.annotation.Configuration
+import org.springframework.context.annotation.Profile
+import org.testcontainers.containers.PostgreSQLContainer;
+import org.testcontainers.utility.DockerImageName
+
+@Configuration
+@Profile("testcontainers")
+class TestContainersConfig {
+
+    @Bean
+    @ServiceConnection
+    fun postgresContainer(): PostgreSQLContainer<*> {
+        return PostgreSQLContainer(DockerImageName.parse("postgres:17-alpine"))
+            .withDatabaseName("legalconsenthub")
+            .withUsername("legalconsenthub")
+            .withPassword("legalconsenthub")
+            .withExposedPorts(5432)
+            .withCreateContainerCmdModifier { cmd ->
+                cmd.withHostConfig(
+                    HostConfig().apply {
+                        this.withPortBindings(
+                            PortBinding(
+                                Ports.Binding.bindPort(5432),
+                                ExposedPort(5432)
+                            )
+                        )
+                    }
+                )
+            }
+            .withReuse(true)
+    }
+}
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/error/ExceptionHandler.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/error/ExceptionHandler.kt
index 48490e0..e486765 100644
--- a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/error/ExceptionHandler.kt
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/error/ExceptionHandler.kt
@@ -16,7 +16,7 @@ class ExceptionHandler {
     var logger = LoggerFactory.getLogger(ExceptionHandler::class.java)
 
     @ResponseBody
-    @ExceptionHandler(ApplicationFormNotFoundException::class)
+    @ExceptionHandler(ApplicationFormNotFoundException::class, UserNotFoundException::class)
     @ResponseStatus(HttpStatus.NOT_FOUND)
     fun handleNotFoundError(e: Exception): ResponseEntity<ProblemDetails> {
         logger.warn(e.message, e)
@@ -47,6 +47,22 @@ class ExceptionHandler {
             )
     }
 
+    @ResponseBody
+    @ExceptionHandler(UserAlreadyExistsException::class)
+    @ResponseStatus(HttpStatus.CONFLICT)
+    fun handleUserAlreadyExistsError(e: UserAlreadyExistsException): ResponseEntity<ProblemDetails> {
+        logger.warn(e.message, e)
+        return ResponseEntity.status(HttpStatus.CONFLICT).contentType(MediaType.APPLICATION_PROBLEM_JSON)
+            .body(
+                ProblemDetails(
+                    title = "Conflict",
+                    status = HttpStatus.CONFLICT.value(),
+                    type = URI.create("about:blank"),
+                    detail = e.message ?: "Resource already exists"
+                )
+            )
+    }
+
     @ResponseBody
     @ExceptionHandler(
         ApplicationFormNotCreatedException::class,
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/error/UserAlreadyExistsException.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/error/UserAlreadyExistsException.kt
new file mode 100644
index 0000000..2a1aa07
--- /dev/null
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/error/UserAlreadyExistsException.kt
@@ -0,0 +1,3 @@
+package com.betriebsratkanzlei.legalconsenthub.error
+
+class UserAlreadyExistsException(id: String): RuntimeException("User with ID $id already exists") 
\ No newline at end of file
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/error/UserNotFoundException.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/error/UserNotFoundException.kt
new file mode 100644
index 0000000..eaf0729
--- /dev/null
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/error/UserNotFoundException.kt
@@ -0,0 +1,3 @@
+package com.betriebsratkanzlei.legalconsenthub.error
+
+class UserNotFoundException(id: String): RuntimeException("Couldn't find user with ID: $id") 
\ No newline at end of file
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/Notification.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/Notification.kt
new file mode 100644
index 0000000..6a401df
--- /dev/null
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/Notification.kt
@@ -0,0 +1,52 @@
+package com.betriebsratkanzlei.legalconsenthub.notification
+
+import com.betriebsratkanzlei.legalconsenthub.user.User
+import com.betriebsratkanzlei.legalconsenthub_api.model.NotificationType
+import jakarta.persistence.Column
+import jakarta.persistence.JoinColumn
+import jakarta.persistence.ManyToOne
+import jakarta.persistence.Entity
+import jakarta.persistence.EntityListeners
+import jakarta.persistence.Enumerated
+import jakarta.persistence.EnumType
+import jakarta.persistence.GeneratedValue
+import jakarta.persistence.Id
+import org.springframework.data.annotation.CreatedDate
+import org.springframework.data.jpa.domain.support.AuditingEntityListener
+import java.time.LocalDateTime
+import java.util.UUID
+
+@Entity
+@EntityListeners(AuditingEntityListener::class)
+class Notification(
+    @Id
+    @GeneratedValue
+    var id: UUID? = null,
+
+    @Column(nullable = false)
+    var title: String = "",
+
+    @Column(nullable = false, columnDefinition = "TEXT")
+    var message: String = "",
+
+    @Column(nullable = false)
+    var clickTarget: String = "",
+
+    @Column(nullable = false)
+    var isRead: Boolean = false,
+
+    @ManyToOne
+    @JoinColumn(name = "recipient_id", nullable = true)
+    var recipient: User?,
+
+    @Column(nullable = false)
+    var targetGroup: String = "",
+
+    @Enumerated(EnumType.STRING)
+    @Column(nullable = false)
+    var type: NotificationType = NotificationType.INFO,
+
+    @CreatedDate
+    @Column(nullable = false)
+    var createdAt: LocalDateTime? = null
+) 
\ No newline at end of file
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/NotificationController.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/NotificationController.kt
new file mode 100644
index 0000000..43e6213
--- /dev/null
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/NotificationController.kt
@@ -0,0 +1,102 @@
+package com.betriebsratkanzlei.legalconsenthub.notification
+
+import com.betriebsratkanzlei.legalconsenthub.security.CustomJwtTokenPrincipal
+import com.betriebsratkanzlei.legalconsenthub.user.UserService
+import com.betriebsratkanzlei.legalconsenthub_api.api.NotificationApi
+import com.betriebsratkanzlei.legalconsenthub_api.model.CreateNotificationDto
+import com.betriebsratkanzlei.legalconsenthub_api.model.NotificationDto
+import com.betriebsratkanzlei.legalconsenthub_api.model.PagedNotificationDto
+import org.springframework.http.ResponseEntity
+import org.springframework.security.core.context.SecurityContextHolder
+import org.springframework.web.bind.annotation.RestController
+import java.util.UUID
+
+@RestController
+class NotificationController(
+    private val notificationService: NotificationService,
+    private val notificationMapper: NotificationMapper,
+    private val pagedNotificationMapper: PagedNotificationMapper,
+    private val userService: UserService
+) : NotificationApi {
+
+    override fun getNotifications(page: Int, size: Int): ResponseEntity<PagedNotificationDto> {
+        val principal = SecurityContextHolder.getContext().authentication.principal as CustomJwtTokenPrincipal
+        val recipientId = principal.id ?: throw IllegalStateException("User ID not found")
+
+        val user = userService.getUserById(recipientId)
+
+        val notifications = if (user.role != null) {
+            notificationService.getNotificationsForUserAndGroup(
+                recipientId = recipientId,
+                userRole = user.role!!.value,
+                page = page,
+                size = size
+            )
+        } else {
+            notificationService.getNotificationsForUser(
+                recipientId = recipientId,
+                page = page,
+                size = size
+            )
+        }
+
+        return ResponseEntity.ok(pagedNotificationMapper.toPagedNotificationDto(notifications))
+    }
+
+    override fun getUnreadNotifications(): ResponseEntity<List<NotificationDto>> {
+        val principal = SecurityContextHolder.getContext().authentication.principal as CustomJwtTokenPrincipal
+        val recipientId = principal.id ?: throw IllegalStateException("User ID not found")
+
+        val user = userService.getUserById(recipientId)
+
+        val notifications = if (user.role != null) {
+            notificationService.getUnreadNotificationsForUserAndGroup(recipientId, user.role!!.value)
+        } else {
+            notificationService.getUnreadNotificationsForUser(recipientId)
+        }
+
+        return ResponseEntity.ok(notifications.map { notificationMapper.toNotificationDto(it) })
+    }
+
+    override fun getUnreadNotificationCount(): ResponseEntity<Long> {
+        val principal = SecurityContextHolder.getContext().authentication.principal as CustomJwtTokenPrincipal
+        val recipientId = principal.id ?: throw IllegalStateException("User ID not found")
+
+        val user = userService.getUserById(recipientId)
+
+        val count = if (user.role != null) {
+            notificationService.getUnreadNotificationCountForUserAndGroup(recipientId, user.role!!.value)
+        } else {
+            notificationService.getUnreadNotificationCount(recipientId)
+        }
+
+        return ResponseEntity.ok(count)
+    }
+
+    override fun markAllNotificationsAsRead(): ResponseEntity<Unit> {
+        val principal = SecurityContextHolder.getContext().authentication.principal as CustomJwtTokenPrincipal
+        val recipientId = principal.id ?: throw IllegalStateException("User ID not found")
+
+        val user = userService.getUserById(recipientId)
+
+        if (user.role != null) {
+            notificationService.markAllAsReadForUserAndGroup(recipientId, user.role!!.value)
+        } else {
+            notificationService.markAllAsRead(recipientId)
+        }
+
+        return ResponseEntity.noContent().build()
+    }
+
+    override fun markNotificationAsRead(id: UUID): ResponseEntity<NotificationDto> {
+        val notification = notificationService.markAsRead(id)
+            ?: return ResponseEntity.notFound().build()
+
+        return ResponseEntity.ok(notificationMapper.toNotificationDto(notification))
+    }
+
+    override fun createNotification(createNotificationDto: CreateNotificationDto): ResponseEntity<NotificationDto> {
+        val notification = notificationService.createNotification(createNotificationDto)
+        return ResponseEntity.ok(notificationMapper.toNotificationDto(notification))
+    }
+}
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/NotificationMapper.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/NotificationMapper.kt
new file mode 100644
index 0000000..fc273b9
--- /dev/null
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/NotificationMapper.kt
@@ -0,0 +1,38 @@
+package com.betriebsratkanzlei.legalconsenthub.notification
+
+import com.betriebsratkanzlei.legalconsenthub.user.UserMapper
+import com.betriebsratkanzlei.legalconsenthub_api.model.CreateNotificationDto
+import com.betriebsratkanzlei.legalconsenthub_api.model.NotificationDto
+import org.springframework.stereotype.Component
+
+@Component
+class NotificationMapper(
+    private val userMapper: UserMapper
+) {
+
+    fun toNotificationDto(notification: Notification): NotificationDto {
+        return NotificationDto(
+            id = notification.id!!,
+            title = notification.title,
+            message = notification.message,
+            clickTarget = notification.clickTarget,
+            isRead = notification.isRead,
+            recipient = notification.recipient?.let { userMapper.toUserDto(it) },
+            targetGroup = notification.targetGroup,
+            type = notification.type,
+            createdAt = notification.createdAt!!
+        )
+    }
+
+    fun toNotification(createNotificationDto: CreateNotificationDto): Notification {
+        return Notification(
+            title = createNotificationDto.title,
+            message = createNotificationDto.message,
+            clickTarget = createNotificationDto.clickTarget,
+            isRead = false,
+            recipient = createNotificationDto.recipient?.let { userMapper.toUser(it) },
+            targetGroup = createNotificationDto.targetGroup,
+            type = createNotificationDto.type
+        )
+    }
+}
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/NotificationRepository.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/NotificationRepository.kt
new file mode 100644
index 0000000..e6fffae
--- /dev/null
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/NotificationRepository.kt
@@ -0,0 +1,47 @@
+package com.betriebsratkanzlei.legalconsenthub.notification
+
+import org.springframework.data.domain.Page
+import org.springframework.data.domain.Pageable
+import org.springframework.data.jpa.repository.JpaRepository
+import org.springframework.data.jpa.repository.Modifying
+import org.springframework.data.jpa.repository.Query
+import org.springframework.data.repository.query.Param
+import org.springframework.stereotype.Repository
+import java.util.UUID
+
+@Repository
+interface NotificationRepository : JpaRepository<Notification, UUID> {
+
+    fun findByRecipientIdOrderByCreatedAtDesc(recipientId: String?, pageable: Pageable): Page<Notification>
+
+    fun findByRecipientIdAndIsReadFalseOrderByCreatedAtDesc(recipientId: String?): List<Notification>
+
+    fun findByRecipientIsNullOrderByCreatedAtDesc(pageable: Pageable): Page<Notification>
+
+    fun findByRecipientIsNullAndIsReadFalseOrderByCreatedAtDesc(): List<Notification>
+
+    @Query("SELECT n FROM Notification n WHERE (n.recipient.id = :recipientId) OR (n.recipient IS NULL AND n.targetGroup = :targetGroup) OR (n.recipient IS NULL AND n.targetGroup = 'all') ORDER BY n.createdAt DESC")
+    fun findByRecipientIdOrTargetGroupOrderByCreatedAtDesc(@Param("recipientId") recipientId: String, @Param("targetGroup") targetGroup: String, pageable: Pageable): Page<Notification>
+
+    @Query("SELECT n FROM Notification n WHERE ((n.recipient.id = :recipientId) OR (n.recipient IS NULL AND n.targetGroup = :targetGroup) OR (n.recipient IS NULL AND n.targetGroup = 'all')) AND n.isRead = false ORDER BY n.createdAt DESC")
+    fun findByRecipientIdOrTargetGroupAndIsReadFalseOrderByCreatedAtDesc(@Param("recipientId") recipientId: String, @Param("targetGroup") targetGroup: String): List<Notification>
+
+    @Query("SELECT COUNT(n) FROM Notification n WHERE ((n.recipient.id = :recipientId) OR (n.recipient IS NULL AND n.targetGroup = :targetGroup) OR (n.recipient IS NULL AND n.targetGroup = 'all')) AND n.isRead = false")
+    fun countByRecipientIdOrTargetGroupAndIsReadFalse(@Param("recipientId") recipientId: String, @Param("targetGroup") targetGroup: String): Long
+
+    @Modifying
+    @Query("UPDATE Notification n SET n.isRead = true WHERE n.recipient.id = :recipientId")
+    fun markAllAsReadByRecipientId(@Param("recipientId") recipientId: String)
+
+    @Modifying
+    @Query("UPDATE Notification n SET n.isRead = true WHERE n.recipient IS NULL")
+    fun markAllAsReadForNullRecipients()
+
+    @Modifying
+    @Query("UPDATE Notification n SET n.isRead = true WHERE (n.recipient.id = :recipientId) OR (n.recipient IS NULL AND n.targetGroup = :targetGroup) OR (n.recipient IS NULL AND n.targetGroup = 'all')")
+    fun markAllAsReadByRecipientIdOrTargetGroup(@Param("recipientId") recipientId: String, @Param("targetGroup") targetGroup: String)
+
+    fun countByRecipientIdAndIsReadFalse(recipientId: String?): Long
+
+    fun countByRecipientIsNullAndIsReadFalse(): Long
+}
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/NotificationService.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/NotificationService.kt
new file mode 100644
index 0000000..3544450
--- /dev/null
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/NotificationService.kt
@@ -0,0 +1,87 @@
+package com.betriebsratkanzlei.legalconsenthub.notification
+
+import com.betriebsratkanzlei.legalconsenthub.user.User
+import com.betriebsratkanzlei.legalconsenthub_api.model.CreateNotificationDto
+import com.betriebsratkanzlei.legalconsenthub_api.model.NotificationType
+import org.springframework.data.domain.Page
+import org.springframework.data.domain.PageRequest
+import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
+import java.util.UUID
+
+@Service
+class NotificationService(
+    private val notificationRepository: NotificationRepository,
+    private val notificationMapper: NotificationMapper
+) {
+
+    fun createNotification(createNotificationDto: CreateNotificationDto): Notification {
+        val notification = notificationMapper.toNotification(createNotificationDto)
+        return notificationRepository.save(notification)
+    }
+
+    fun createNotificationForUser(
+        title: String,
+        message: String,
+        clickTarget: String,
+        recipient: User?,
+        targetGroup: String,
+        type: NotificationType = NotificationType.INFO
+    ): Notification {
+        val notification = Notification(
+            title = title,
+            message = message,
+            clickTarget = clickTarget,
+            recipient = recipient,
+            targetGroup = targetGroup,
+            type = type
+        )
+        return notificationRepository.save(notification)
+    }
+
+    fun getNotificationsForUser(recipientId: String, page: Int = 0, size: Int = 20): Page<Notification> {
+        val pageable = PageRequest.of(page, size)
+        return notificationRepository.findByRecipientIdOrderByCreatedAtDesc(recipientId, pageable)
+    }
+
+    fun getNotificationsForUserAndGroup(recipientId: String, userRole: String, page: Int = 0, size: Int = 20): Page<Notification> {
+        val pageable = PageRequest.of(page, size)
+        return notificationRepository.findByRecipientIdOrTargetGroupOrderByCreatedAtDesc(recipientId, userRole, pageable)
+    }
+
+    fun getUnreadNotificationsForUser(recipientId: String): List<Notification> {
+        return notificationRepository.findByRecipientIdAndIsReadFalseOrderByCreatedAtDesc(recipientId)
+    }
+
+    fun getUnreadNotificationsForUserAndGroup(recipientId: String, userRole: String): List<Notification> {
+        return notificationRepository.findByRecipientIdOrTargetGroupAndIsReadFalseOrderByCreatedAtDesc(recipientId, userRole)
+    }
+
+    fun getUnreadNotificationCount(recipientId: String): Long {
+        return notificationRepository.countByRecipientIdAndIsReadFalse(recipientId)
+    }
+
+    fun getUnreadNotificationCountForUserAndGroup(recipientId: String, userRole: String): Long {
+        return notificationRepository.countByRecipientIdOrTargetGroupAndIsReadFalse(recipientId, userRole)
+    }
+
+    @Transactional
+    fun markAllAsRead(recipientId: String) {
+        notificationRepository.markAllAsReadByRecipientId(recipientId)
+    }
+
+    @Transactional
+    fun markAllAsReadForUserAndGroup(recipientId: String, userRole: String) {
+        notificationRepository.markAllAsReadByRecipientIdOrTargetGroup(recipientId, userRole)
+    }
+
+    fun markAsRead(notificationId: UUID): Notification? {
+        val notification = notificationRepository.findById(notificationId).orElse(null)
+        return if (notification != null) {
+            notification.isRead = true
+            notificationRepository.save(notification)
+        } else {
+            null
+        }
+    }
+}
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/PagedNotificationMapper.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/PagedNotificationMapper.kt
new file mode 100644
index 0000000..7b1ea28
--- /dev/null
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/notification/PagedNotificationMapper.kt
@@ -0,0 +1,25 @@
+package com.betriebsratkanzlei.legalconsenthub.notification
+
+import com.betriebsratkanzlei.legalconsenthub_api.model.PagedNotificationDto
+import org.springframework.data.domain.Page
+import org.springframework.stereotype.Component
+
+@Component
+class PagedNotificationMapper(
+    private val notificationMapper: NotificationMapper
+) {
+
+    fun toPagedNotificationDto(page: Page<Notification>): PagedNotificationDto {
+        return PagedNotificationDto(
+            content = page.content.map { notificationMapper.toNotificationDto(it) },
+            number = page.number,
+            propertySize = page.size,
+            numberOfElements = page.numberOfElements,
+            totalElements = page.totalElements,
+            totalPages = page.totalPages,
+            first = page.isFirst,
+            last = page.isLast,
+            empty = page.isEmpty
+        )
+    }
+} 
\ No newline at end of file
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/User.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/User.kt
index 8b0324c..c33d5f2 100644
--- a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/User.kt
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/User.kt
@@ -1,9 +1,37 @@
 package com.betriebsratkanzlei.legalconsenthub.user
 
-import jakarta.persistence.Embeddable
+import com.betriebsratkanzlei.legalconsenthub_api.model.UserRole
+import com.betriebsratkanzlei.legalconsenthub_api.model.UserStatus
+import jakarta.persistence.*
+import org.springframework.data.annotation.CreatedDate
+import org.springframework.data.annotation.LastModifiedDate
+import org.springframework.data.jpa.domain.support.AuditingEntityListener
+import java.time.LocalDateTime
 
-@Embeddable
+@Entity
+@EntityListeners(AuditingEntityListener::class)
+@Table(name = "app_user")
 class User(
+    @Id
+    @Column(nullable = false)
+    var id: String,
+
+    @Column(nullable = false)
     var name: String,
-    var id: String
+
+    @Enumerated(EnumType.STRING)
+    @Column(nullable = false)
+    var status: UserStatus = UserStatus.ACTIVE,
+    
+    @Enumerated(EnumType.STRING)
+    @Column(nullable = true)
+    var role: UserRole? = null,
+
+    @CreatedDate
+    @Column(nullable = false)
+    var createdAt: LocalDateTime? = null,
+
+    @LastModifiedDate
+    @Column(nullable = false)
+    var modifiedAt: LocalDateTime? = null
 )
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/UserController.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/UserController.kt
new file mode 100644
index 0000000..8019ab7
--- /dev/null
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/UserController.kt
@@ -0,0 +1,29 @@
+package com.betriebsratkanzlei.legalconsenthub.user
+
+import com.betriebsratkanzlei.legalconsenthub_api.api.UserApi
+import com.betriebsratkanzlei.legalconsenthub_api.model.CreateUserDto
+import com.betriebsratkanzlei.legalconsenthub_api.model.UserDto
+import org.springframework.http.ResponseEntity
+import org.springframework.web.bind.annotation.RestController
+
+@RestController
+class UserController(
+    private val userService: UserService,
+    private val userMapper: UserMapper
+) : UserApi {
+
+    override fun createUser(createUserDto: CreateUserDto): ResponseEntity<UserDto> {
+        val user = userService.createUser(createUserDto)
+        return ResponseEntity.status(201).body(userMapper.toUserDto(user))
+    }
+
+    override fun getUserById(id: String): ResponseEntity<UserDto> {
+        val user = userService.getUserById(id)
+        return ResponseEntity.ok(userMapper.toUserDto(user))
+    }
+
+    override fun deleteUser(id: String): ResponseEntity<Unit> {
+        userService.deleteUser(id)
+        return ResponseEntity.noContent().build()
+    }
+} 
\ No newline at end of file
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/UserMapper.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/UserMapper.kt
index f13c319..8a1f9e6 100644
--- a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/UserMapper.kt
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/UserMapper.kt
@@ -9,6 +9,8 @@ class UserMapper() {
         return UserDto(
             id = user.id,
             name = user.name,
+            status = user.status,
+            role = user.role
         )
     }
 
@@ -16,6 +18,8 @@ class UserMapper() {
         return User(
             id = userDto.id,
             name = userDto.name,
+            status = userDto.status,
+            role = userDto.role
         )
     }
 }
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/UserRepository.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/UserRepository.kt
new file mode 100644
index 0000000..1507d75
--- /dev/null
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/UserRepository.kt
@@ -0,0 +1,7 @@
+package com.betriebsratkanzlei.legalconsenthub.user
+
+import org.springframework.data.jpa.repository.JpaRepository
+import org.springframework.stereotype.Repository
+
+@Repository
+interface UserRepository : JpaRepository<User, String> 
\ No newline at end of file
diff --git a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/UserService.kt b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/UserService.kt
new file mode 100644
index 0000000..ea5ef2f
--- /dev/null
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/UserService.kt
@@ -0,0 +1,46 @@
+package com.betriebsratkanzlei.legalconsenthub.user
+
+import com.betriebsratkanzlei.legalconsenthub.error.UserAlreadyExistsException
+import com.betriebsratkanzlei.legalconsenthub.error.UserNotFoundException
+import com.betriebsratkanzlei.legalconsenthub.security.CustomJwtTokenPrincipal
+import com.betriebsratkanzlei.legalconsenthub_api.model.CreateUserDto
+import com.betriebsratkanzlei.legalconsenthub_api.model.UserStatus
+import org.springframework.security.core.context.SecurityContextHolder
+import org.springframework.stereotype.Service
+
+@Service
+class UserService(
+    private val userRepository: UserRepository
+) {
+
+    fun getCurrentUser(): User {
+        val principal = SecurityContextHolder.getContext().authentication.principal as CustomJwtTokenPrincipal
+        val userId = principal.id ?: throw IllegalStateException("User ID not found")
+
+        return userRepository.findById(userId)
+            .orElseThrow { UserNotFoundException(userId) }
+    }
+
+    fun createUser(createUserDto: CreateUserDto): User {
+        if (userRepository.existsById(createUserDto.id)) {
+            throw UserAlreadyExistsException(createUserDto.id)
+        }
+
+        val user = User(
+            id = createUserDto.id,
+            name = createUserDto.name,
+            status = createUserDto.status ?: UserStatus.ACTIVE,
+            role = createUserDto.role
+        )
+        return userRepository.save(user)
+    }
+
+    fun getUserById(userId: String): User {
+        return userRepository.findById(userId)
+            .orElseThrow { UserNotFoundException(userId) }
+    }
+
+    fun deleteUser(userId: String) {
+        userRepository.deleteById(userId)
+    }
+}
diff --git a/legalconsenthub-backend/src/main/resources/application-local-h2.yaml b/legalconsenthub-backend/src/main/resources/application-h2.yaml
similarity index 100%
rename from legalconsenthub-backend/src/main/resources/application-local-h2.yaml
rename to legalconsenthub-backend/src/main/resources/application-h2.yaml
diff --git a/legalconsenthub-backend/src/main/resources/application-testcontainers.yaml b/legalconsenthub-backend/src/main/resources/application-testcontainers.yaml
new file mode 100644
index 0000000..168b8f5
--- /dev/null
+++ b/legalconsenthub-backend/src/main/resources/application-testcontainers.yaml
@@ -0,0 +1,35 @@
+spring:
+  application:
+    name: legalconsenthub
+
+  jpa:
+    database-platform: org.hibernate.dialect.PostgreSQLDialect
+    hibernate:
+      ddl-auto: create
+    show-sql: true
+    properties:
+      hibernate:
+        format_sql: true
+        jdbc:
+          batch_size: 100
+          order_inserts: true
+          enable_lazy_load_no_trans: true
+
+  liquibase:
+    enabled: true
+    drop-first: false
+    change-log: classpath:/db/changelog/db.changelog-master.yaml
+    default-schema: public
+
+  sql:
+    init:
+      platform: postgresql
+
+logging:
+  level:
+    org:
+      springframework:
+        security: TRACE
+        oauth2: TRACE
+    org.testcontainers: INFO
+    com.github.dockerjava: WARN
diff --git a/legalconsenthub-backend/src/main/resources/db/migrations/001-schema.sql b/legalconsenthub-backend/src/main/resources/db/migrations/001-schema.sql
index 8466d50..c313639 100644
--- a/legalconsenthub-backend/src/main/resources/db/migrations/001-schema.sql
+++ b/legalconsenthub-backend/src/main/resources/db/migrations/001-schema.sql
@@ -1,16 +1,25 @@
+create table app_user
+(
+    created_at  timestamp(6) not null,
+    modified_at timestamp(6) not null,
+    id          varchar(255) not null,
+    name        varchar(255) not null,
+    role        varchar(255),
+    status      varchar(255) not null check (status in ('INVITED', 'ACTIVE', 'BLOCKED', 'SUSPENDED_SUBSCRIPTION')),
+    primary key (id)
+);
+
 create table application_form
 (
-    is_template           boolean      not null,
-    created_at            timestamp(6) not null,
-    modified_at           timestamp(6) not null,
-    id                    uuid         not null,
-    created_by_id         varchar(255) not null,
-    created_by_name       varchar(255) not null,
-    last_modified_by_id   varchar(255) not null,
-    last_modified_by_name varchar(255) not null,
-    name                  varchar(255) not null,
-    organization_id       varchar(255),
-    status                enum ('APPROVED','DRAFT','REJECTED','SIGNED','SUBMITTED') not null,
+    is_template         boolean      not null,
+    created_at          timestamp(6) not null,
+    modified_at         timestamp(6) not null,
+    id                  uuid         not null,
+    created_by_id       varchar(255) not null,
+    last_modified_by_id varchar(255) not null,
+    name                varchar(255) not null,
+    organization_id     varchar(255),
+    status              varchar(255) not null check (status in ('DRAFT', 'SUBMITTED', 'APPROVED', 'REJECTED', 'SIGNED')),
     primary key (id)
 );
 
@@ -22,15 +31,14 @@ create table comment
     form_element_id     uuid         not null,
     id                  uuid         not null,
     created_by_id       varchar(255) not null,
-    created_by_name     varchar(255) not null,
     message             varchar(255) not null,
     primary key (id)
 );
 
 create table form_element_options
 (
-    employee_data_category tinyint      not null check (employee_data_category between 0 and 3),
-    processing_purpose     tinyint      not null check (processing_purpose between 0 and 3),
+    employee_data_category smallint     not null check (employee_data_category between 0 and 3),
+    processing_purpose     smallint     not null check (processing_purpose between 0 and 3),
     form_element_id        uuid         not null,
     label                  varchar(255) not null,
     option_value           varchar(255) not null
@@ -38,9 +46,9 @@ create table form_element_options
 
 create table form_element
 (
-    type                    tinyint not null check (type between 0 and 4),
-    form_element_section_id uuid    not null,
-    id                      uuid    not null,
+    type                    smallint not null check (type between 0 and 4),
+    form_element_section_id uuid     not null,
+    id                      uuid     not null,
     description             varchar(255),
     title                   varchar(255),
     primary key (id)
@@ -56,11 +64,40 @@ create table form_element_section
     primary key (id)
 );
 
+create table notification
+(
+    is_read      boolean      not null,
+    created_at   timestamp(6) not null,
+    id           uuid         not null,
+    click_target varchar(255) not null,
+    message      TEXT         not null,
+    recipient_id varchar(255),
+    target_group varchar(255) not null,
+    title        varchar(255) not null,
+    type         varchar(255) not null check (type in ('INFO', 'WARNING', 'ERROR')),
+    primary key (id)
+);
+
+alter table if exists application_form
+    add constraint FKhtad5onoy2jknhtyfmx6cvvey
+    foreign key (created_by_id)
+    references app_user;
+
+alter table if exists application_form
+    add constraint FK5yewx8bespw0uiivxioeh7q0d
+    foreign key (last_modified_by_id)
+    references app_user;
+
 alter table if exists comment
     add constraint FKlavy9axrt26sepreg5lqtuoap
     foreign key (application_form_id)
     references application_form;
 
+alter table if exists comment
+    add constraint FKbbjqikfmgeacfsnaasxxqoygh
+    foreign key (created_by_id)
+    references app_user;
+
 alter table if exists comment
     add constraint FKfg84w0i76tw9os13950272c6f
     foreign key (form_element_id)
@@ -80,3 +117,8 @@ alter table if exists form_element_section
     add constraint FKtn0lreovauwf2v29doo70o3qs
     foreign key (application_form_id)
     references application_form;
+
+alter table if exists notification
+    add constraint FKeg1j4hnp0y4lbm0y35hgr4e8r
+    foreign key (recipient_id)
+    references app_user;
diff --git a/legalconsenthub/better-auth_migrations/2025-05-29T08-34-09.998Z.sql b/legalconsenthub/better-auth_migrations/2025-08-07T06-04-32.922Z.sql
similarity index 100%
rename from legalconsenthub/better-auth_migrations/2025-05-29T08-34-09.998Z.sql
rename to legalconsenthub/better-auth_migrations/2025-08-07T06-04-32.922Z.sql
diff --git a/legalconsenthub/components/NotificationsSlideover.vue b/legalconsenthub/components/NotificationsSlideover.vue
new file mode 100644
index 0000000..7b9c6cd
--- /dev/null
+++ b/legalconsenthub/components/NotificationsSlideover.vue
@@ -0,0 +1,89 @@
+<template>
+  <USlideover v-model:open="isOpen" title="Benachrichtigungen">
+    <template #body>
+      <div v-if="notifications.length === 0" class="text-center py-8 text-muted">
+        <UIcon name="i-heroicons-bell-slash" class="h-8 w-8 mx-auto mb-2" />
+        <p>Keine Benachrichtigungen</p>
+      </div>
+
+      <NuxtLink
+        v-for="notification in notifications"
+        :key="notification.id"
+        :to="notification.clickTarget"
+        class="px-3 py-2.5 rounded-md hover:bg-elevated/50 flex items-center gap-3 relative -mx-3 first:-mt-3 last:-mb-3"
+        @click="handleNotificationClick(notification)"
+      >
+        <UChip
+          :color="notification.type === 'ERROR' ? 'error' : notification.type === 'WARNING' ? 'warning' : 'primary'"
+          :show="!notification.isRead"
+          inset
+        >
+          <UIcon
+            :name="
+              notification.type === 'ERROR'
+                ? 'i-heroicons-x-circle'
+                : notification.type === 'WARNING'
+                  ? 'i-heroicons-exclamation-triangle'
+                  : 'i-heroicons-information-circle'
+            "
+            class="h-6 w-6"
+          />
+        </UChip>
+
+        <div class="text-sm flex-1">
+          <p class="flex items-center justify-between">
+            <span class="text-highlighted font-medium">{{ notification.title }}</span>
+
+            <time
+              :datetime="notification.createdAt.toISOString()"
+              class="text-muted text-xs"
+              v-text="formatTimeAgo(notification.createdAt)"
+            />
+          </p>
+
+          <p class="text-dimmed">
+            {{ notification.message }}
+          </p>
+
+          <div class="flex items-center gap-2 mt-1">
+            <UBadge
+              :color="notification.type === 'ERROR' ? 'error' : notification.type === 'WARNING' ? 'warning' : 'info'"
+              variant="subtle"
+              size="xs"
+            >
+              {{ notification.type }}
+            </UBadge>
+            <UBadge color="neutral" variant="subtle" size="xs">
+              {{ notification.targetGroup }}
+            </UBadge>
+          </div>
+        </div>
+      </NuxtLink>
+    </template>
+  </USlideover>
+</template>
+
+<script setup lang="ts">
+import { formatTimeAgo } from '@vueuse/core'
+
+const emit = defineEmits<{
+  'update:modelValue': [value: boolean]
+}>()
+
+const props = defineProps<{
+  modelValue: boolean
+}>()
+
+const isOpen = computed({
+  get: () => props.modelValue,
+  set: (value) => emit('update:modelValue', value)
+})
+
+const { notifications, fetchNotifications, handleNotificationClick } = useNotification()
+
+watch(isOpen, async (newValue) => {
+  if (newValue) {
+    await fetchNotifications()
+  }
+})
+</script>
diff --git a/legalconsenthub/composables/index.ts b/legalconsenthub/composables/index.ts
index c7b79df..91e5b68 100644
--- a/legalconsenthub/composables/index.ts
+++ b/legalconsenthub/composables/index.ts
@@ -1,2 +1,6 @@
 export { useApplicationFormTemplate } from './applicationFormTemplate/useApplicationFormTemplate'
 export { useApplicationForm } from './applicationForm/useApplicationForm'
+export { useNotification } from './notification/useNotification'
+export { useNotificationApi } from './notification/useNotificationApi'
+export { useUser } from './user/useUser'
+export { useUserApi } from './user/useUserApi'
diff --git a/legalconsenthub/composables/notification/useNotification.ts b/legalconsenthub/composables/notification/useNotification.ts
new file mode 100644
index 0000000..ed9978c
--- /dev/null
+++ b/legalconsenthub/composables/notification/useNotification.ts
@@ -0,0 +1,118 @@
+import type { NotificationDto } from '~/.api-client'
+
+export const useNotification = () => {
+  const {
+    getNotifications,
+    getUnreadNotifications,
+    getUnreadNotificationCount,
+    markAllNotificationsAsRead,
+    markNotificationAsRead
+  } = useNotificationApi()
+
+  const notifications = ref<NotificationDto[]>([])
+  const unreadNotifications = ref<NotificationDto[]>([])
+  const unreadCount = ref<number>(0)
+  const isLoading = ref(false)
+
+  const fetchNotifications = async (page: number = 0, size: number = 20) => {
+    isLoading.value = true
+    try {
+      const response = await getNotifications(page, size)
+      notifications.value = response.content || []
+      return response
+    } catch (error) {
+      console.error('Failed to fetch notifications:', error)
+      throw error
+    } finally {
+      isLoading.value = false
+    }
+  }
+
+  const fetchUnreadNotifications = async () => {
+    try {
+      const response = await getUnreadNotifications()
+      unreadNotifications.value = response || []
+      return response
+    } catch (error) {
+      console.error('Failed to fetch unread notifications:', error)
+      throw error
+    }
+  }
+
+  const fetchUnreadCount = async () => {
+    try {
+      const count = await getUnreadNotificationCount()
+      unreadCount.value = count || 0
+      return count
+    } catch (error) {
+      console.error('Failed to fetch unread count:', error)
+      throw error
+    }
+  }
+
+  const markAllAsRead = async () => {
+    try {
+      await markAllNotificationsAsRead()
+      unreadCount.value = 0
+      unreadNotifications.value = []
+      notifications.value = notifications.value.map((n) => ({ ...n, isRead: true }))
+    } catch (error) {
+      console.error('Failed to mark all as read:', error)
+      throw error
+    }
+  }
+
+  const markAsRead = async (notificationId: string) => {
+    try {
+      await markNotificationAsRead(notificationId)
+      const index = notifications.value.findIndex((n) => n.id === notificationId)
+      if (index !== -1) {
+        notifications.value[index].isRead = true
+      }
+      // Remove from unread notifications
+      unreadNotifications.value = unreadNotifications.value.filter((n) => n.id !== notificationId)
+
+      if (unreadCount.value > 0) {
+        unreadCount.value--
+      }
+    } catch (error) {
+      console.error('Failed to mark notification as read:', error)
+      throw error
+    }
+  }
+
+  const handleNotificationClick = async (notification: NotificationDto) => {
+    if (!notification.isRead) {
+      await markAsRead(notification.id)
+    }
+    if (notification.clickTarget) {
+      await navigateTo(notification.clickTarget)
+    }
+  }
+
+  const startPeriodicRefresh = (intervalMs: number = 30000) => {
+    const interval = setInterval(() => {
+      fetchUnreadCount()
+    }, intervalMs)
+
+    onUnmounted(() => {
+      clearInterval(interval)
+    })
+
+    return interval
+  }
+
+  return {
+    notifications: readonly(notifications),
+    unreadNotifications: readonly(unreadNotifications),
+    unreadCount: readonly(unreadCount),
+    isLoading: readonly(isLoading),
+    fetchNotifications,
+    fetchUnreadNotifications,
+    fetchUnreadCount,
+    markAllAsRead,
+    markAsRead,
+    handleNotificationClick,
+    startPeriodicRefresh
+  }
+}
diff --git a/legalconsenthub/composables/notification/useNotificationApi.ts b/legalconsenthub/composables/notification/useNotificationApi.ts
new file mode 100644
index 0000000..db3a749
--- /dev/null
+++ b/legalconsenthub/composables/notification/useNotificationApi.ts
@@ -0,0 +1,55 @@
+import {
+  NotificationApi,
+  Configuration,
+  type NotificationDto,
+  type PagedNotificationDto,
+  type CreateNotificationDto
+} from '~/.api-client'
+import { cleanDoubleSlashes, withoutTrailingSlash } from 'ufo'
+
+export function useNotificationApi() {
+  const appBaseUrl = useRuntimeConfig().app.baseURL
+  const { serverApiBaseUrl, serverApiBasePath, clientProxyBasePath } = useRuntimeConfig().public
+  const { jwt } = useAuth()
+
+  const basePath = withoutTrailingSlash(
+    cleanDoubleSlashes(import.meta.client ? appBaseUrl + clientProxyBasePath : serverApiBaseUrl + serverApiBasePath)
+  )
+
+  const notificationApiClient = new NotificationApi(
+    new Configuration({ basePath, headers: { Authorization: jwt.value ? `Bearer ${jwt.value}` : '' } })
+  )
+
+  async function createNotification(createNotificationDto: CreateNotificationDto): Promise<NotificationDto> {
+    return notificationApiClient.createNotification({ createNotificationDto })
+  }
+
+  async function getNotifications(page?: number, size?: number): Promise<PagedNotificationDto> {
+    return notificationApiClient.getNotifications({ page, size })
+  }
+
+  async function getUnreadNotifications(): Promise<NotificationDto[]> {
+    return notificationApiClient.getUnreadNotifications()
+  }
+
+  async function getUnreadNotificationCount(): Promise<number> {
+    return notificationApiClient.getUnreadNotificationCount()
+  }
+
+  async function markAllNotificationsAsRead(): Promise<void> {
+    return notificationApiClient.markAllNotificationsAsRead()
+  }
+
+  async function markNotificationAsRead(id: string): Promise<NotificationDto> {
+    return notificationApiClient.markNotificationAsRead({ id })
+  }
+
+  return {
+    createNotification,
+    getNotifications,
+    getUnreadNotifications,
+    getUnreadNotificationCount,
+    markAllNotificationsAsRead,
+    markNotificationAsRead
+  }
+}
diff --git a/legalconsenthub/composables/useAuth.ts b/legalconsenthub/composables/useAuth.ts
index c231069..e440448 100644
--- a/legalconsenthub/composables/useAuth.ts
+++ b/legalconsenthub/composables/useAuth.ts
@@ -13,6 +13,7 @@ import {
   worksCouncilMemberRole,
   employeeRole,
   adminRole,
+  ownerRole,
   ROLES
 } from '~/server/utils/permissions'
 
@@ -57,7 +58,8 @@ export function useAuth() {
           [ROLES.EMPLOYER]: employerRole,
           [ROLES.WORKS_COUNCIL_MEMBER]: worksCouncilMemberRole,
           [ROLES.EMPLOYEE]: employeeRole,
-          [ROLES.ADMIN]: adminRole
+          [ROLES.ADMIN]: adminRole,
+          [ROLES.OWNER]: ownerRole
         }
       }),
       jwtClient()
diff --git a/legalconsenthub/composables/usePermissions.ts b/legalconsenthub/composables/usePermissions.ts
index 16b16ad..0b4bd58 100644
--- a/legalconsenthub/composables/usePermissions.ts
+++ b/legalconsenthub/composables/usePermissions.ts
@@ -30,11 +30,11 @@ export function usePermissions() {
   )
 
   const canInviteMembers = computed(() =>
-    hasPermission({ member: ["invite"] })
+    hasPermission({ invitation: ["create"] })
   )
 
   const canManageOrganization = computed(() =>
-    hasPermission({ organization: ["manage_settings"] })
+    hasPermission({ organization: ["update"] })
   )
 
   // Role checks
@@ -42,6 +42,7 @@ export function usePermissions() {
   const isEmployee = computed(() => currentRole.value === ROLES.EMPLOYEE)
   const isWorksCouncilMember = computed(() => currentRole.value === ROLES.WORKS_COUNCIL_MEMBER)
   const isAdmin = computed(() => currentRole.value === ROLES.ADMIN)
+  const isOwner = computed(() => currentRole.value === ROLES.OWNER)
 
   const getCurrentRoleInfo = () => {
     const roleInfo = {
@@ -68,6 +69,12 @@ export function usePermissions() {
         description: 'Vollzugriff auf Organisationsverwaltung',
         color: 'red',
         icon: 'i-lucide-settings'
+      },
+      [ROLES.OWNER]: {
+        name: 'Eigentümer',
+        description: 'Vollzugriff und Organisationsbesitz',
+        color: 'yellow',
+        icon: 'i-lucide-crown'
       }
     }
 
@@ -87,6 +94,7 @@ export function usePermissions() {
     isEmployee,
     isWorksCouncilMember,
     isAdmin,
+    isOwner,
 
     // Computed permissions
     canCreateApplicationForm,
diff --git a/legalconsenthub/composables/user/useUser.ts b/legalconsenthub/composables/user/useUser.ts
new file mode 100644
index 0000000..f52ea3a
--- /dev/null
+++ b/legalconsenthub/composables/user/useUser.ts
@@ -0,0 +1,58 @@
+import {
+  type CreateUserDto,
+  type UserDto,
+  ResponseError
+} from '~/.api-client'
+import { useUserApi } from './useUserApi'
+
+export function useUser() {
+  const userApi = useUserApi()
+
+  async function createUser(createUserDto: CreateUserDto): Promise<UserDto> {
+    try {
+      return await userApi.createUser(createUserDto)
+    } catch (e: unknown) {
+      if (e instanceof ResponseError) {
+        console.error('Failed creating user:', e.response)
+      } else {
+        console.error('Failed creating user:', e)
+      }
+      return Promise.reject(e)
+    }
+  }
+
+  async function getUserById(id: string): Promise<UserDto | null> {
+    try {
+      return await userApi.getUserById(id)
+    } catch (e: unknown) {
+      if (e instanceof ResponseError && e.response.status === 404) {
+        return null
+      }
+      if (e instanceof ResponseError) {
+        console.error(`Failed retrieving user with ID ${id}:`, e.response)
+      } else {
+        console.error(`Failed retrieving user with ID ${id}:`, e)
+      }
+      return Promise.reject(e)
+    }
+  }
+
+  async function deleteUser(id: string): Promise<void> {
+    try {
+      return await userApi.deleteUser(id)
+    } catch (e: unknown) {
+      if (e instanceof ResponseError) {
+        console.error(`Failed deleting user with ID ${id}:`, e.response)
+      } else {
+        console.error(`Failed deleting user with ID ${id}:`, e)
+      }
+      return Promise.reject(e)
+    }
+  }
+
+  return {
+    createUser,
+    getUserById,
+    deleteUser
+  }
+} 
\ No newline at end of file
diff --git a/legalconsenthub/composables/user/useUserApi.ts b/legalconsenthub/composables/user/useUserApi.ts
new file mode 100644
index 0000000..c8550c1
--- /dev/null
+++ b/legalconsenthub/composables/user/useUserApi.ts
@@ -0,0 +1,39 @@
+import {
+  UserApi,
+  Configuration,
+  type CreateUserDto,
+  type UserDto
+} from '~/.api-client'
+import { cleanDoubleSlashes, withoutTrailingSlash } from 'ufo'
+
+export function useUserApi() {
+  const appBaseUrl = useRuntimeConfig().app.baseURL
+  const { serverApiBaseUrl, serverApiBasePath, clientProxyBasePath } = useRuntimeConfig().public
+  const { jwt } = useAuth()
+
+  const basePath = withoutTrailingSlash(
+    cleanDoubleSlashes(import.meta.client ? appBaseUrl + clientProxyBasePath : serverApiBaseUrl + serverApiBasePath)
+  )
+
+  const userApiClient = new UserApi(
+    new Configuration({ basePath, headers: { Authorization: jwt.value ? `Bearer ${jwt.value}` : '' } })
+  )
+
+  async function createUser(createUserDto: CreateUserDto): Promise<UserDto> {
+    return userApiClient.createUser({ createUserDto })
+  }
+
+  async function getUserById(id: string): Promise<UserDto> {
+    return userApiClient.getUserById({ id })
+  }
+
+  async function deleteUser(id: string): Promise<void> {
+    return userApiClient.deleteUser({ id })
+  }
+
+  return {
+    createUser,
+    getUserById,
+    deleteUser
+  }
+} 
\ No newline at end of file
diff --git a/legalconsenthub/layouts/default.vue b/legalconsenthub/layouts/default.vue
index 1adc3af..33cbea2 100644
--- a/legalconsenthub/layouts/default.vue
+++ b/legalconsenthub/layouts/default.vue
@@ -29,10 +29,25 @@
     </UDashboardSidebar>
 
     <slot />
+
+    <NotificationsSlideover v-model="isNotificationsSlideoverOpen" />
   </UDashboardGroup>
 </template>
 
 <script setup lang="ts">
 const links = [[], []]
 const open = ref(false)
+
+const isNotificationsSlideoverOpen = ref(false)
+const { unreadCount, fetchUnreadCount, startPeriodicRefresh } = useNotification()
+
+onMounted(async () => {
+  await fetchUnreadCount()
+  startPeriodicRefresh()
+})
+
+provide('notificationState', {
+  isNotificationsSlideoverOpen,
+  unreadCount
+})
 </script>
diff --git a/legalconsenthub/package.json b/legalconsenthub/package.json
index 375f530..8db7c01 100644
--- a/legalconsenthub/package.json
+++ b/legalconsenthub/package.json
@@ -15,13 +15,15 @@
     "api:generate": "openapi-generator-cli generate -i ../legalconsenthub-backend/api/legalconsenthub.yml -g typescript-fetch -o .api-client",
     "api:middleware:generate": "openapi-generator-cli generate -i ../legalconsenthub-middleware/api/legalconsenthub-middleware.yml -g typescript-fetch -o .api-client-middleware",
     "fix:bettersqlite": "cd node_modules/better-sqlite3 && pnpm dlx node-gyp rebuild && cd ../..",
-    "generate:betterauth": "pnpm dlx @better-auth/cli generate --config server/utils/auth.ts",
-    "migrate:betterauth": "pnpm dlx @better-auth/cli migrate --config server/utils/auth.ts"
+    "generate:betterauth": "pnpm dlx @better-auth/cli generate --config server/utils/auth.ts --yes",
+    "migrate:betterauth": "pnpm dlx @better-auth/cli migrate --config server/utils/auth.ts --yes",
+    "recreate-db:betterauth": "rm sqlite.db && pnpm run migrate:betterauth && pnpm run migrate:betterauth"
   },
   "dependencies": {
     "@nuxt/ui-pro": "3.1.1",
     "@nuxtjs/i18n": "10.0.3",
     "@pinia/nuxt": "0.10.1",
+    "@vueuse/core": "^13.6.0",
     "better-auth": "1.3.4",
     "better-sqlite3": "11.8.1",
     "nuxt": "3.16.1",
diff --git a/legalconsenthub/pages/index.vue b/legalconsenthub/pages/index.vue
index 6b063bb..1c0d58f 100644
--- a/legalconsenthub/pages/index.vue
+++ b/legalconsenthub/pages/index.vue
@@ -19,6 +19,16 @@
             }"
             class="w-48"
           />
+
+          <UTooltip text="Notifications" :shortcuts="['N']">
+            <UButton color="neutral" variant="ghost" square @click="isNotificationsSlideoverOpen = true">
+              <UChip :show="unreadCount > 0" color="error" inset>
+                <UIcon name="i-lucide-bell" class="size-5 shrink-0" />
+                <span v-if="unreadCount > 0" class="ml-1 text-xs">{{ unreadCount }}</span>
+              </UChip>
+            </UButton>
+          </UTooltip>
+
           <UDropdownMenu :items="items">
             <UButton icon="i-lucide-plus" size="md" class="rounded-full" />
           </UDropdownMenu>
@@ -49,11 +59,7 @@
             <p class="text-(--ui-text-muted) text-sm">
               Erstellt von {{ applicationFormElem.createdBy.name }} am {{ formatDate(applicationFormElem.createdAt) }}
             </p>
-            <div class="mt-2">
-              <UChip size="sm">
-                {{ applicationFormElem.status }}
-              </UChip>
-            </div>
+            <p class="text-(--ui-text-muted) text-sm">Status: {{ applicationFormElem.status }}</p>
           </div>
           <div>
             <UPageLinks :links="getLinksForApplicationForm(applicationFormElem)" />
@@ -77,6 +83,12 @@ const { getAllApplicationForms, deleteApplicationFormById } = useApplicationForm
 const route = useRoute()
 const { organizations, selectedOrganization } = useAuth()
 
+// Inject notification state from layout
+const { isNotificationsSlideoverOpen, unreadCount } = inject('notificationState', {
+  isNotificationsSlideoverOpen: ref(false),
+  unreadCount: ref(0)
+})
+
 const { data } = await useAsyncData<PagedApplicationFormDto>(
   async () => {
     if (!selectedOrganization.value) {
diff --git a/legalconsenthub/pages/signup.vue b/legalconsenthub/pages/signup.vue
index 2ce95b5..c43e534 100644
--- a/legalconsenthub/pages/signup.vue
+++ b/legalconsenthub/pages/signup.vue
@@ -20,6 +20,7 @@
 <script setup lang="ts">
 import * as z from 'zod'
 import type { FormSubmitEvent } from '@nuxt/ui'
+import { UserRole } from '~/.api-client'
 
 definePageMeta({ layout: 'auth' })
 
@@ -27,6 +28,7 @@ useSeoMeta({ title: 'Sign up' })
 
 const toast = useToast()
 const { signUp } = useAuth()
+const { createUser } = useUser()
 
 const fields = [
   {
@@ -90,8 +92,28 @@ function onSubmit(payload: FormSubmitEvent<Schema>) {
         // TODO: Hide loading spinner
         console.log('Receiving register response')
       },
-      onSuccess: async () => {
+      onSuccess: async (ctx) => {
         console.log('Successfully registered!')
+
+        // Create user in backend after successful Better Auth registration
+        try {
+          console.log('Creating user in backend...', ctx.data)
+          await createUser({
+            id: ctx.data.user.id,
+            name: ctx.data.user.name,
+            status: 'ACTIVE',
+            role: UserRole.Employee
+          })
+          console.log('User created in backend successfully')
+        } catch (error) {
+          console.error('Failed to create user in backend:', error)
+          toast.add({
+            title: 'Warning',
+            description: 'Account created but there was an issue with backend setup. Please contact support.',
+            color: 'warning'
+          })
+        }
+
         await navigateTo('/')
       },
       onError: (ctx) => {
diff --git a/legalconsenthub/pnpm-lock.yaml b/legalconsenthub/pnpm-lock.yaml
index addf651..aa8b0a0 100644
--- a/legalconsenthub/pnpm-lock.yaml
+++ b/legalconsenthub/pnpm-lock.yaml
@@ -17,6 +17,9 @@ importers:
       '@pinia/nuxt':
         specifier: 0.10.1
         version: 0.10.1(magicast@0.3.5)(pinia@3.0.1(typescript@5.7.3)(vue@3.5.13(typescript@5.7.3)))
+      '@vueuse/core':
+        specifier: ^13.6.0
+        version: 13.6.0(vue@3.5.13(typescript@5.7.3))
       better-auth:
         specifier: 1.3.4
         version: 1.3.4(react-dom@19.1.0(react@19.1.0))(react@19.1.0)
@@ -2143,6 +2146,11 @@ packages:
     peerDependencies:
       vue: ^3.5.0
 
+  '@vueuse/core@13.6.0':
+    resolution: {integrity: sha512-DJbD5fV86muVmBgS9QQPddVX7d9hWYswzlf4bIyUD2dj8GC46R1uNClZhVAmsdVts4xb2jwp1PbpuiA50Qee1A==}
+    peerDependencies:
+      vue: ^3.5.0
+
   '@vueuse/integrations@13.1.0':
     resolution: {integrity: sha512-wJ6aANdUs4SOpVabChQK+uLIwxRTUAEmn1DJnflGG7Wq6yaipiRmp6as/Md201FjJnquQt8MecIPbFv8HSBeDA==}
     peerDependencies:
@@ -2194,6 +2202,9 @@ packages:
   '@vueuse/metadata@13.1.0':
     resolution: {integrity: sha512-+TDd7/a78jale5YbHX9KHW3cEDav1lz1JptwDvep2zSG8XjCsVE+9mHIzjTOaPbHUAk5XiE4jXLz51/tS+aKQw==}
 
+  '@vueuse/metadata@13.6.0':
+    resolution: {integrity: sha512-rnIH7JvU7NjrpexTsl2Iwv0V0yAx9cw7+clymjKuLSXG0QMcLD0LDgdNmXic+qL0SGvgSVPEpM9IDO/wqo1vkQ==}
+
   '@vueuse/shared@10.11.1':
     resolution: {integrity: sha512-LHpC8711VFZlDaYUXEBbFBCQ7GS3dVU9mjOhhMhXP6txTV4EhYQg/KGnQuvt/sPAtoUKq7VVUnL6mVtFoL42sA==}
 
@@ -2205,6 +2216,11 @@ packages:
     peerDependencies:
       vue: ^3.5.0
 
+  '@vueuse/shared@13.6.0':
+    resolution: {integrity: sha512-pDykCSoS2T3fsQrYqf9SyF0QXWHmcGPQ+qiOVjlYSzlWd9dgppB2bFSM1GgKKkt7uzn0BBMV3IbJsUfHG2+BCg==}
+    peerDependencies:
+      vue: ^3.5.0
+
   abbrev@3.0.0:
     resolution: {integrity: sha512-+/kfrslGQ7TNV2ecmQwMJj/B65g5KVq1/L3SGVZ3tCYGqlzFuFCGBZJtMP99wH3NpEUyAjn0zPdPUg0D+DwrOA==}
     engines: {node: ^18.17.0 || >=20.5.0}
@@ -6974,7 +6990,7 @@ snapshots:
       '@nuxt/schema': 3.17.2
       '@nuxt/ui': 3.1.1(@babel/parser@7.28.0)(axios@1.7.9)(db0@0.3.1(better-sqlite3@11.8.1))(embla-carousel@8.6.0)(ioredis@5.6.0)(magicast@0.3.5)(typescript@5.7.3)(vite@6.2.3(@types/node@22.13.14)(jiti@2.4.2)(lightningcss@1.29.2)(terser@5.39.0)(yaml@2.7.0))(vue-router@4.5.0(vue@3.5.13(typescript@5.7.3)))(vue@3.5.13(typescript@5.7.3))(zod@4.0.10)
       '@standard-schema/spec': 1.0.0
-      '@vueuse/core': 13.1.0(vue@3.5.13(typescript@5.7.3))
+      '@vueuse/core': 13.6.0(vue@3.5.13(typescript@5.7.3))
       consola: 3.4.2
       defu: 6.1.4
       dotenv: 16.5.0
@@ -6987,7 +7003,7 @@ snapshots:
       tinyglobby: 0.2.13
       typescript: 5.7.3
       unplugin: 2.3.2
-      unplugin-auto-import: 19.1.2(@nuxt/kit@3.17.2(magicast@0.3.5))(@vueuse/core@13.1.0(vue@3.5.13(typescript@5.7.3)))
+      unplugin-auto-import: 19.1.2(@nuxt/kit@3.17.2(magicast@0.3.5))(@vueuse/core@13.6.0(vue@3.5.13(typescript@5.7.3)))
       unplugin-vue-components: 28.5.0(@babel/parser@7.28.0)(@nuxt/kit@3.17.2(magicast@0.3.5))(vue@3.5.13(typescript@5.7.3))
     optionalDependencies:
       zod: 4.0.10
@@ -7046,7 +7062,7 @@ snapshots:
       '@tailwindcss/vite': 4.1.6(vite@6.2.3(@types/node@22.13.14)(jiti@2.4.2)(lightningcss@1.29.2)(terser@5.39.0)(yaml@2.7.0))
       '@tanstack/vue-table': 8.21.3(vue@3.5.13(typescript@5.7.3))
       '@unhead/vue': 2.0.8(vue@3.5.13(typescript@5.7.3))
-      '@vueuse/core': 13.1.0(vue@3.5.13(typescript@5.7.3))
+      '@vueuse/core': 13.6.0(vue@3.5.13(typescript@5.7.3))
       '@vueuse/integrations': 13.1.0(axios@1.7.9)(fuse.js@7.1.0)(vue@3.5.13(typescript@5.7.3))
       colortranslator: 4.1.0
       consola: 3.4.2
@@ -7072,7 +7088,7 @@ snapshots:
       tinyglobby: 0.2.13
       typescript: 5.7.3
       unplugin: 2.3.2
-      unplugin-auto-import: 19.1.2(@nuxt/kit@3.17.2(magicast@0.3.5))(@vueuse/core@13.1.0(vue@3.5.13(typescript@5.7.3)))
+      unplugin-auto-import: 19.1.2(@nuxt/kit@3.17.2(magicast@0.3.5))(@vueuse/core@13.6.0(vue@3.5.13(typescript@5.7.3)))
       unplugin-vue-components: 28.5.0(@babel/parser@7.28.0)(@nuxt/kit@3.17.2(magicast@0.3.5))(vue@3.5.13(typescript@5.7.3))
       vaul-vue: 0.4.1(reka-ui@2.2.1(typescript@5.7.3)(vue@3.5.13(typescript@5.7.3)))(vue@3.5.13(typescript@5.7.3))
       vue-component-type-helpers: 2.2.10
@@ -8201,6 +8217,13 @@ snapshots:
       '@vueuse/shared': 13.1.0(vue@3.5.13(typescript@5.7.3))
       vue: 3.5.13(typescript@5.7.3)
 
+  '@vueuse/core@13.6.0(vue@3.5.13(typescript@5.7.3))':
+    dependencies:
+      '@types/web-bluetooth': 0.0.21
+      '@vueuse/metadata': 13.6.0
+      '@vueuse/shared': 13.6.0(vue@3.5.13(typescript@5.7.3))
+      vue: 3.5.13(typescript@5.7.3)
+
   '@vueuse/integrations@13.1.0(axios@1.7.9)(fuse.js@7.1.0)(vue@3.5.13(typescript@5.7.3))':
     dependencies:
       '@vueuse/core': 13.1.0(vue@3.5.13(typescript@5.7.3))
@@ -8216,6 +8239,8 @@ snapshots:
 
   '@vueuse/metadata@13.1.0': {}
 
+  '@vueuse/metadata@13.6.0': {}
+
   '@vueuse/shared@10.11.1(vue@3.5.13(typescript@5.7.3))':
     dependencies:
       vue-demi: 0.14.10(vue@3.5.13(typescript@5.7.3))
@@ -8233,6 +8258,10 @@ snapshots:
     dependencies:
       vue: 3.5.13(typescript@5.7.3)
 
+  '@vueuse/shared@13.6.0(vue@3.5.13(typescript@5.7.3))':
+    dependencies:
+      vue: 3.5.13(typescript@5.7.3)
+
   abbrev@3.0.0: {}
 
   abort-controller@3.0.0:
@@ -11626,7 +11655,7 @@ snapshots:
 
   universalify@2.0.1: {}
 
-  unplugin-auto-import@19.1.2(@nuxt/kit@3.17.2(magicast@0.3.5))(@vueuse/core@13.1.0(vue@3.5.13(typescript@5.7.3))):
+  unplugin-auto-import@19.1.2(@nuxt/kit@3.17.2(magicast@0.3.5))(@vueuse/core@13.6.0(vue@3.5.13(typescript@5.7.3))):
     dependencies:
       local-pkg: 1.1.1
       magic-string: 0.30.17
@@ -11636,7 +11665,7 @@ snapshots:
       unplugin-utils: 0.2.4
     optionalDependencies:
       '@nuxt/kit': 3.17.2(magicast@0.3.5)
-      '@vueuse/core': 13.1.0(vue@3.5.13(typescript@5.7.3))
+      '@vueuse/core': 13.6.0(vue@3.5.13(typescript@5.7.3))
 
   unplugin-utils@0.2.4:
     dependencies:
diff --git a/legalconsenthub/server/utils/auth.ts b/legalconsenthub/server/utils/auth.ts
index 0c2221e..6e8d2ff 100644
--- a/legalconsenthub/server/utils/auth.ts
+++ b/legalconsenthub/server/utils/auth.ts
@@ -55,17 +55,39 @@ export const auth = betterAuth({
 
         const roleDisplayName = roleDisplayNames[data.role as LegalRole] || data.role
 
-        await resend.emails.send({
-          from: 'Legal Consent Hub <noreply@legalconsenthub.com>',
-          to: data.email,
-          subject: `Einladung als ${roleDisplayName} - ${data.organization.name}`,
-          html: `
-            <h2>Einladung zur Organisation ${data.organization.name}</h2>
-            <p>Sie wurden als <strong>${roleDisplayName}</strong> eingeladen.</p>
-            <p><a href="${inviteLink}" style="background: #007bff; color: white; padding: 10px 20px; text-decoration: none; border-radius: 5px;">Einladung annehmen</a></p>
-            <p>Diese Einladung läuft ab am: ${new Date(data.invitation.expiresAt).toLocaleDateString('de-DE')}</p>
-          `
-        })
+        try {
+          const result = await resend.emails.send({
+            from: 'Acme <onboarding@resend.dev>',
+            to: data.email,
+            subject: `Einladung als ${roleDisplayName} - ${data.organization.name}`,
+            html: `
+              <h2>Einladung zur Organisation ${data.organization.name}</h2>
+              <p>Sie wurden als <strong>${roleDisplayName}</strong> eingeladen.</p>
+              <p><a href="${inviteLink}" style="background: #007bff; color: white; padding: 10px 20px; text-decoration: none; border-radius: 5px;">Einladung annehmen</a></p>
+              <p>Diese Einladung läuft ab am: ${new Date(data.invitation.expiresAt).toLocaleDateString('de-DE')}</p>
+            `
+          })
+
+          if (result.error) {
+            throw new Error(`Email sending failed: ${result.error?.statusCode} ${result.error?.error}`)
+          }
+
+          console.log('Email invite link:', inviteLink)
+          console.log('Invitation email sent successfully to:', data.email, 'with ID:', result.data?.id)
+        } catch (error) {
+          console.error('Failed to send invitation email:', error)
+
+          // Log specific error details for debugging
+          const errorObj = error as { response?: { status: number; data: unknown }; message?: string }
+          if (errorObj.response) {
+            console.error('HTTP Status:', errorObj.response.status)
+            console.error('Response data:', errorObj.response.data)
+          }
+
+          // Re-throw the error so BetterAuth knows the email failed
+          const message = errorObj.message || String(error)
+          throw new Error(`Email sending failed: ${message}`)
+        }
       }
     })
   ]
diff --git a/legalconsenthub/server/utils/permissions.ts b/legalconsenthub/server/utils/permissions.ts
index d248338..ca1e7b0 100644
--- a/legalconsenthub/server/utils/permissions.ts
+++ b/legalconsenthub/server/utils/permissions.ts
@@ -1,55 +1,87 @@
 import { createAccessControl } from 'better-auth/plugins/access'
+import { defaultStatements, adminAc, memberAc, ownerAc } from 'better-auth/plugins/organization/access'
+import { defu } from 'defu'
 
-export const statement = {
+const customStatements = {
   application_form: ['create', 'read', 'update', 'delete', 'approve', 'reject', 'submit'],
   agreement: ['create', 'read', 'update', 'sign', 'approve', 'reject'],
-  organization: ['create', 'read', 'update', 'delete', 'manage_settings'],
-  member: ['create', 'read', 'update', 'delete', 'invite', 'remove'],
   comment: ['create', 'read', 'update', 'delete'],
   document: ['create', 'read', 'update', 'delete', 'download', 'upload']
 } as const
 
+export const statement = {
+  ...customStatements,
+  ...defaultStatements
+} as const
+
 export const accessControl = createAccessControl(statement)
 
-// Roles with specific permissions
-export const employerRole = accessControl.newRole({
-  application_form: ['create', 'read', 'approve', 'reject'],
-  agreement: ['create', 'read', 'sign', 'approve'],
-  member: ['invite', 'read'],
-  comment: ['create', 'read', 'update', 'delete'],
-  document: ['create', 'read', 'update', 'delete', 'download', 'upload']
-})
+export const employerRole = accessControl.newRole(
+  defu(
+    {
+      application_form: ['create', 'read', 'approve', 'reject'],
+      agreement: ['create', 'read', 'sign', 'approve'],
+      comment: ['create', 'read', 'update', 'delete'],
+      document: ['create', 'read', 'update', 'delete', 'download', 'upload']
+    },
+    memberAc.statements
+  ) as Parameters<typeof accessControl.newRole>[0]
+)
 
-export const worksCouncilMemberRole = accessControl.newRole({
-  application_form: ['create', 'read', 'update', 'submit'],
-  agreement: ['read', 'sign', 'approve'],
-  member: ['read'],
-  comment: ['create', 'read', 'update', 'delete'],
-  document: ['create', 'read', 'update', 'download', 'upload']
-})
+export const worksCouncilMemberRole = accessControl.newRole(
+  defu(
+    {
+      application_form: ['create', 'read', 'update', 'submit'],
+      agreement: ['read', 'sign', 'approve'],
+      comment: ['create', 'read', 'update', 'delete'],
+      document: ['create', 'read', 'update', 'download', 'upload']
+    },
+    memberAc.statements
+  ) as Parameters<typeof accessControl.newRole>[0]
+)
 
-export const employeeRole = accessControl.newRole({
-  application_form: ['read'],
-  agreement: ['read'],
-  member: ['read'],
-  comment: ['create', 'read'],
-  document: ['read', 'download']
-})
+export const employeeRole = accessControl.newRole(
+  defu(
+    {
+      application_form: ['read'],
+      agreement: ['read'],
+      comment: ['create', 'read'],
+      document: ['read', 'download']
+    },
+    memberAc.statements
+  ) as Parameters<typeof accessControl.newRole>[0]
+)
 
-export const adminRole = accessControl.newRole({
-  application_form: ['create', 'read', 'update', 'delete', 'approve', 'reject'],
-  agreement: ['create', 'read', 'update', 'sign', 'approve', 'reject'],
-  organization: ['create', 'read', 'update', 'delete', 'manage_settings'],
-  member: ['create', 'read', 'update', 'delete', 'invite', 'remove'],
-  comment: ['create', 'read', 'update', 'delete'],
-  document: ['create', 'read', 'update', 'delete', 'download', 'upload']
-})
+export const adminRole = accessControl.newRole(
+  defu(
+    {
+      application_form: ['create', 'read', 'update', 'delete', 'approve', 'reject'],
+      agreement: ['create', 'read', 'update', 'sign', 'approve', 'reject'],
+      comment: ['create', 'read', 'update', 'delete'],
+      document: ['create', 'read', 'update', 'delete', 'download', 'upload']
+    },
+    adminAc.statements
+  ) as Parameters<typeof accessControl.newRole>[0]
+)
+
+export const ownerRole = accessControl.newRole(
+  defu(
+    {
+      application_form: ['create', 'read', 'update', 'delete', 'approve', 'reject', 'submit'],
+      agreement: ['create', 'read', 'update', 'sign', 'approve', 'reject'],
+      comment: ['create', 'read', 'update', 'delete'],
+      document: ['create', 'read', 'update', 'delete', 'download', 'upload']
+    },
+    ownerAc.statements
+  ) as Parameters<typeof accessControl.newRole>[0]
+)
 
 export const ROLES = {
   EMPLOYER: 'employer',
   WORKS_COUNCIL_MEMBER: 'works_council_member',
   EMPLOYEE: 'employee',
-  ADMIN: 'admin'
+  ADMIN: 'admin',
+  OWNER: 'owner'
 } as const
 
 export type LegalRole = (typeof ROLES)[keyof typeof ROLES]
diff --git a/testdata.json b/testdata.json
index f47e04c..f4a4586 100644
--- a/testdata.json
+++ b/testdata.json
@@ -1,8 +1,6 @@
 {
   "isTemplate": true,
   "name": "",
-  "createdBy": "Denis",
-  "lastModifiedBy": "Denis",
   "formElementSections": [
     {
       "title": "Section 1",