Added admin page

backend/src/db_models.py

@@ -318,7 +318,12 @@ class RelationshipType(Base):
 
     # Relationships
     project: Mapped["Project"] = relationship("Project", back_populates="relationship_types")
-    links: Mapped[List["RequirementLink"]] = relationship("RequirementLink", back_populates="relationship_type")
+    links: Mapped[List["RequirementLink"]] = relationship(
+        "RequirementLink", 
+        back_populates="relationship_type",
+        cascade="all, delete-orphan",
+        passive_deletes=True
+    )
 
     # Constraints
     __table_args__ = (

backend/src/main.py

@@ -11,8 +11,9 @@ from src.models import (
     RequirementCreateRequest, RequirementUpdateRequest,
     ProjectResponse, ProjectCreateRequest, ProjectUpdateRequest, ProjectMemberRequest,
     ValidationStatusResponse, ValidationHistoryResponse, ValidationCreateRequest,
-    RelationshipTypeResponse, RelationshipTypeCreateRequest,
+    RelationshipTypeResponse, RelationshipTypeCreateRequest, RelationshipTypeUpdateRequest,
-    RequirementLinkResponse, RequirementLinkCreateRequest, RequirementSearchResult
+    RequirementLinkResponse, RequirementLinkCreateRequest, RequirementSearchResult,
+    RoleResponse, ProjectMemberResponse, UserRoleUpdateRequest, ROLE_DISPLAY_NAMES
 )
 from src.controller import AuthController
 from src.config import get_openid, get_settings
@@ -521,6 +522,240 @@ async def remove_project_member(
     await db.commit()
 
 
+# ===========================================
+# Admin Endpoints (Role Management, Project Admin)
+# ===========================================
+
+@app.get("/api/roles", response_model=List[RoleResponse])
+async def get_all_roles(
+    request: Request,
+    db: AsyncSession = Depends(get_db)
+):
+    """
+    Get all available roles with their display names.
+    
+    Returns:
+        List of roles with id, role_name, and display_name.
+    """
+    # Ensure user is authenticated
+    await _get_current_user_db(request, db)
+    
+    role_repo = RoleRepository(db)
+    roles = await role_repo.get_all()
+    return [RoleResponse.from_role(r) for r in roles]
+
+
+@app.get("/api/projects/{project_id}/members", response_model=List[ProjectMemberResponse])
+async def get_project_members(
+    project_id: int,
+    request: Request,
+    db: AsyncSession = Depends(get_db)
+):
+    """
+    Get all members of a project with their role information.
+    User must be a member of the project.
+
+    Args:
+        project_id: The project ID
+
+    Returns:
+        List of project members with role info.
+    """
+    user = await _get_current_user_db(request, db)
+    await _verify_project_membership(project_id, user.id, db)
+    
+    project_repo = ProjectRepository(db)
+    members = await project_repo.get_members(project_id)
+    
+    return [
+        ProjectMemberResponse(
+            id=member.id,
+            sub=member.sub,
+            role_id=member.role_id,
+            role_name=member.role.role_name if member.role else "unknown",
+            role_display_name=ROLE_DISPLAY_NAMES.get(member.role.role_name, member.role.role_name.title()) if member.role else "Unknown",
+            created_at=member.created_at
+        )
+        for member in members
+    ]
+
+
+@app.put("/api/projects/{project_id}/members/{user_id}/role", response_model=ProjectMemberResponse)
+async def update_member_role(
+    project_id: int,
+    user_id: int,
+    request: Request,
+    role_data: UserRoleUpdateRequest,
+    db: AsyncSession = Depends(get_db)
+):
+    """
+    Update a project member's role.
+    Only project admins (role_id=3) can update roles.
+    Admin cannot demote themselves.
+
+    Args:
+        project_id: The project ID
+        user_id: The user ID to update
+        role_data: The new role ID
+
+    Returns:
+        The updated member info.
+    """
+    current_user = await _get_current_user_db(request, db)
+    
+    # Only admins (role_id=3) can update roles
+    _require_role(current_user, [3], "update member roles")
+    
+    await _verify_project_membership(project_id, current_user.id, db)
+    
+    # Check target user is a member of the project
+    project_repo = ProjectRepository(db)
+    if not await project_repo.is_member(project_id, user_id):
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="User is not a member of this project"
+        )
+    
+    # Prevent self-demotion
+    if current_user.id == user_id and role_data.role_id != 3:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="You cannot demote yourself. Ask another admin to change your role."
+        )
+    
+    # Verify role exists
+    role_repo = RoleRepository(db)
+    role = await role_repo.get_by_id(role_data.role_id)
+    if not role:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail=f"Invalid role id {role_data.role_id}"
+        )
+    
+    # Update the user's role
+    from src.repositories import UserRepository
+    user_repo = UserRepository(db)
+    updated_user = await user_repo.update_role(user_id, role_data.role_id)
+    
+    if not updated_user:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=f"User with id {user_id} not found"
+        )
+    
+    await db.commit()
+    
+    return ProjectMemberResponse(
+        id=updated_user.id,
+        sub=updated_user.sub,
+        role_id=updated_user.role_id,
+        role_name=role.role_name,
+        role_display_name=ROLE_DISPLAY_NAMES.get(role.role_name, role.role_name.title()),
+        created_at=updated_user.created_at
+    )
+
+
+@app.put("/api/projects/{project_id}/relationship-types/{type_id}", response_model=RelationshipTypeResponse)
+async def update_relationship_type(
+    project_id: int,
+    type_id: int,
+    request: Request,
+    type_data: RelationshipTypeUpdateRequest,
+    db: AsyncSession = Depends(get_db)
+):
+    """
+    Update a relationship type.
+    Only project admins (role_id=3) can update relationship types.
+
+    Args:
+        project_id: The project ID
+        type_id: The relationship type ID to update
+        type_data: The updated relationship type data
+
+    Returns:
+        The updated relationship type.
+    """
+    user = await _get_current_user_db(request, db)
+    
+    # Only admins (role_id=3) can update relationship types
+    _require_role(user, [3], "update relationship types")
+    
+    await _verify_project_membership(project_id, user.id, db)
+    
+    rel_type_repo = RelationshipTypeRepository(db)
+    
+    # Check if relationship type exists and belongs to the project
+    existing_type = await rel_type_repo.get_by_id(type_id)
+    if not existing_type:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=f"Relationship type with id {type_id} not found"
+        )
+    if existing_type.project_id != project_id:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Relationship type does not belong to this project"
+        )
+    
+    updated_type = await rel_type_repo.update(
+        relationship_type_id=type_id,
+        type_name=type_data.type_name,
+        type_description=type_data.type_description,
+        inverse_type_name=type_data.inverse_type_name
+    )
+    
+    await db.commit()
+    return RelationshipTypeResponse.model_validate(updated_type)
+
+
+@app.delete("/api/projects/{project_id}/relationship-types/{type_id}", status_code=status.HTTP_204_NO_CONTENT)
+async def delete_relationship_type(
+    project_id: int,
+    type_id: int,
+    request: Request,
+    db: AsyncSession = Depends(get_db)
+):
+    """
+    Delete a relationship type.
+    Only project admins (role_id=3) can delete relationship types.
+    This will also delete all links using this relationship type.
+
+    Args:
+        project_id: The project ID
+        type_id: The relationship type ID to delete
+    """
+    user = await _get_current_user_db(request, db)
+    
+    # Only admins (role_id=3) can delete relationship types
+    _require_role(user, [3], "delete relationship types")
+    
+    await _verify_project_membership(project_id, user.id, db)
+    
+    rel_type_repo = RelationshipTypeRepository(db)
+    
+    # Check if relationship type exists and belongs to the project
+    existing_type = await rel_type_repo.get_by_id(type_id)
+    if not existing_type:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=f"Relationship type with id {type_id} not found"
+        )
+    if existing_type.project_id != project_id:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Relationship type does not belong to this project"
+        )
+    
+    deleted = await rel_type_repo.delete(type_id)
+    if not deleted:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=f"Relationship type with id {type_id} not found"
+        )
+    
+    await db.commit()
+
+
 # ===========================================
 # Requirements Endpoints
 # ===========================================
@@ -968,7 +1203,7 @@ async def create_relationship_type(
 ):
     """
     Create a new relationship type for a project.
-    Only admins (role_id=1) can create relationship types.
+    Only project admins (role_id=3) can create relationship types.
 
     Args:
         project_id: The project ID
@@ -979,8 +1214,8 @@ async def create_relationship_type(
     """
     user = await _get_current_user_db(request, db)
     
-    # Only admins can create relationship types
+    # Only admins (role_id=3) can create relationship types
-    _require_role(user, [1], "create relationship types")
+    _require_role(user, [3], "create relationship types")
     
     await _verify_project_membership(project_id, user.id, db)
     

backend/src/models.py

@@ -20,7 +20,52 @@ class UserInfo(BaseModel):
     full_name: Optional[str] = None
     db_user_id: Optional[int] = None  # Database user ID (populated after login)
     role: Optional[str] = None  # User role name
-    role_id: Optional[int] = None  # User role ID (1=admin, 2=auditor, 3=user, etc.)
+    role_id: Optional[int] = None  # User role ID (1=editor, 2=auditor, 3=admin)
+
+
+# Role schemas
+ROLE_DISPLAY_NAMES = {
+    "editor": "Editor",
+    "auditor": "Auditor", 
+    "admin": "Project Admin"
+}
+
+
+class RoleResponse(BaseModel):
+    """Response schema for a role."""
+    id: int
+    role_name: str
+    display_name: str
+
+    class Config:
+        from_attributes = True
+
+    @classmethod
+    def from_role(cls, role) -> "RoleResponse":
+        """Create a RoleResponse from a Role model."""
+        return cls(
+            id=role.id,
+            role_name=role.role_name,
+            display_name=ROLE_DISPLAY_NAMES.get(role.role_name, role.role_name.title())
+        )
+
+
+class ProjectMemberResponse(BaseModel):
+    """Response schema for a project member with role info."""
+    id: int
+    sub: str
+    role_id: int
+    role_name: str
+    role_display_name: str
+    created_at: Optional[datetime] = None
+
+    class Config:
+        from_attributes = True
+
+
+class UserRoleUpdateRequest(BaseModel):
+    """Request schema for updating a user's role."""
+    role_id: int
 
 
 # Project schemas
@@ -215,6 +260,13 @@ class RelationshipTypeCreateRequest(BaseModel):
     inverse_type_name: Optional[str] = None
 
 
+class RelationshipTypeUpdateRequest(BaseModel):
+    """Request schema for updating a relationship type."""
+    type_name: Optional[str] = None
+    type_description: Optional[str] = None
+    inverse_type_name: Optional[str] = None
+
+
 # Requirement Link schemas
 class LinkedRequirementInfo(BaseModel):
     """Brief info about a linked requirement."""

backend/src/repositories/project_repository.py

@@ -229,6 +229,7 @@ class ProjectRepository:
         """
         result = await self.session.execute(
             select(User)
+            .options(selectinload(User.role))
             .join(ProjectMember, User.id == ProjectMember.user_id)
             .where(ProjectMember.project_id == project_id)
         )

backend/src/repositories/relationship_type_repository.py

@@ -76,6 +76,40 @@ class RelationshipTypeRepository:
         await self.db.refresh(relationship_type)
         return relationship_type
 
+    async def update(
+        self,
+        relationship_type_id: int,
+        type_name: Optional[str] = None,
+        type_description: Optional[str] = None,
+        inverse_type_name: Optional[str] = None
+    ) -> Optional[RelationshipType]:
+        """
+        Update a relationship type.
+        
+        Args:
+            relationship_type_id: The ID of the relationship type to update
+            type_name: New name (optional)
+            type_description: New description (optional)
+            inverse_type_name: New inverse name (optional)
+            
+        Returns:
+            The updated relationship type or None if not found.
+        """
+        relationship_type = await self.get_by_id(relationship_type_id)
+        if not relationship_type:
+            return None
+        
+        if type_name is not None:
+            relationship_type.type_name = type_name
+        if type_description is not None:
+            relationship_type.type_description = type_description
+        if inverse_type_name is not None:
+            relationship_type.inverse_type_name = inverse_type_name
+        
+        await self.db.flush()
+        await self.db.refresh(relationship_type)
+        return relationship_type
+
     async def delete(self, relationship_type_id: int) -> bool:
         """
         Delete a relationship type by ID.

backend/src/repositories/user_repository.py

@@ -2,7 +2,7 @@
 Repository layer for User database operations.
 Handles CRUD operations and user provisioning on first login.
 """
-from typing import Optional
+from typing import Optional, List
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import selectinload
@@ -11,8 +11,64 @@ import logging
 
 logger = logging.getLogger(__name__)
 
-# Default role for new users
+# Default role for new users (editor = role_id 1)
-DEFAULT_ROLE_NAME = "user"
+DEFAULT_ROLE_NAME = "editor"
+
+
+class RoleRepository:
+    """Repository for Role-related database operations."""
+
+    def __init__(self, session: AsyncSession):
+        self.session = session
+
+    async def get_by_name(self, role_name: str) -> Optional[Role]:
+        """Get a role by name."""
+        result = await self.session.execute(
+            select(Role).where(Role.role_name == role_name)
+        )
+        return result.scalar_one_or_none()
+
+    async def get_by_id(self, role_id: int) -> Optional[Role]:
+        """Get a role by ID."""
+        result = await self.session.execute(
+            select(Role).where(Role.id == role_id)
+        )
+        return result.scalar_one_or_none()
+
+    async def create(self, role_name: str) -> Role:
+        """Create a new role."""
+        role = Role(role_name=role_name)
+        self.session.add(role)
+        await self.session.flush()
+        await self.session.refresh(role)
+        return role
+
+    async def get_all(self) -> List[Role]:
+        """
+        Get all roles.
+        
+        Returns:
+            List of all roles
+        """
+        result = await self.session.execute(
+            select(Role).order_by(Role.id)
+        )
+        return list(result.scalars().all())
+
+    async def ensure_default_roles_exist(self) -> None:
+        """
+        Ensure default roles exist in the database.
+        Called during application startup.
+        Creates roles in order: editor (1), auditor (2), admin (3)
+        """
+        # Order matters for role IDs: editor=1, auditor=2, admin=3
+        default_roles = ["editor", "auditor", "admin"]
+        
+        for role_name in default_roles:
+            existing = await self.get_by_name(role_name)
+            if existing is None:
+                logger.info(f"Creating default role: {role_name}")
+                await self.create(role_name)
 
 
 class UserRepository:
@@ -72,6 +128,26 @@ class UserRepository:
         await self.session.refresh(user)
         return user
 
+    async def update_role(self, user_id: int, role_id: int) -> Optional[User]:
+        """
+        Update a user's role.
+        
+        Args:
+            user_id: The user ID to update
+            role_id: The new role ID
+            
+        Returns:
+            The updated User, or None if not found
+        """
+        user = await self.get_by_id(user_id)
+        if not user:
+            return None
+        
+        user.role_id = role_id
+        await self.session.flush()
+        await self.session.refresh(user)
+        return user
+
     async def get_or_create_default_role(self) -> Role:
         """
         Get the default user role, creating it if it doesn't exist.
@@ -79,17 +155,12 @@ class UserRepository:
         Returns:
             The default Role
         """
-        result = await self.session.execute(
+        role_repo = RoleRepository(self.session)
-            select(Role).where(Role.role_name == DEFAULT_ROLE_NAME)
+        role = await role_repo.get_by_name(DEFAULT_ROLE_NAME)
-        )
-        role = result.scalar_one_or_none()
 
         if role is None:
             logger.info(f"Creating default role: {DEFAULT_ROLE_NAME}")
-            role = Role(role_name=DEFAULT_ROLE_NAME)
+            role = await role_repo.create(DEFAULT_ROLE_NAME)
-            self.session.add(role)
-            await self.session.flush()
-            await self.session.refresh(role)
 
         return role
 
@@ -122,45 +193,3 @@ class UserRepository:
         
         logger.info(f"Created new user with id: {user.id}, sub: {sub}")
         return user, True
-
-
-class RoleRepository:
-    """Repository for Role-related database operations."""
-
-    def __init__(self, session: AsyncSession):
-        self.session = session
-
-    async def get_by_name(self, role_name: str) -> Optional[Role]:
-        """Get a role by name."""
-        result = await self.session.execute(
-            select(Role).where(Role.role_name == role_name)
-        )
-        return result.scalar_one_or_none()
-
-    async def get_by_id(self, role_id: int) -> Optional[Role]:
-        """Get a role by ID."""
-        result = await self.session.execute(
-            select(Role).where(Role.id == role_id)
-        )
-        return result.scalar_one_or_none()
-
-    async def create(self, role_name: str) -> Role:
-        """Create a new role."""
-        role = Role(role_name=role_name)
-        self.session.add(role)
-        await self.session.flush()
-        await self.session.refresh(role)
-        return role
-
-    async def ensure_default_roles_exist(self) -> None:
-        """
-        Ensure default roles exist in the database.
-        Called during application startup.
-        """
-        default_roles = ["admin", "user", "viewer"]
-        
-        for role_name in default_roles:
-            existing = await self.get_by_name(role_name)
-            if existing is None:
-                logger.info(f"Creating default role: {role_name}")
-                await self.create(role_name)

frontend/src/App.tsx

@@ -4,6 +4,7 @@ import HomePage from '@/pages/HomePage'
 import DashboardPage from '@/pages/DashboardPage'
 import RequirementsPage from '@/pages/RequirementsPage'
 import RequirementDetailPage from '@/pages/RequirementDetailPage'
+import AdminPage from '@/pages/AdminPage'
 import ProtectedRoute from '@/components/ProtectedRoute'
 
 function App() {
@@ -41,6 +42,14 @@ function App() {
           </ProtectedRoute>
         }
       />
+      <Route
+        path="/admin"
+        element={
+          <ProtectedRoute>
+            <AdminPage />
+          </ProtectedRoute>
+        }
+      />
     </Routes>
   )
 }

frontend/src/pages/AdminPage.tsx

@@ -0,0 +1,814 @@
+import { useState, useEffect } from 'react'
+import { useNavigate } from 'react-router-dom'
+import { useAuth, useProject } from '@/hooks'
+import {
+  projectService,
+  relationshipService,
+  userService,
+  RelationshipType,
+  ProjectMember,
+  Role,
+} from '@/services'
+
+type TabType = 'project' | 'members' | 'relationships'
+
+export default function AdminPage() {
+  const { user } = useAuth()
+  const { currentProject, setCurrentProject } = useProject()
+  const navigate = useNavigate()
+
+  // Tab state
+  const [activeTab, setActiveTab] = useState<TabType>('project')
+
+  // Project settings state
+  const [projectName, setProjectName] = useState('')
+  const [projectDesc, setProjectDesc] = useState('')
+  const [projectLoading, setProjectLoading] = useState(false)
+  const [projectError, setProjectError] = useState<string | null>(null)
+  const [projectSuccess, setProjectSuccess] = useState<string | null>(null)
+
+  // Members state
+  const [members, setMembers] = useState<ProjectMember[]>([])
+  const [roles, setRoles] = useState<Role[]>([])
+  const [membersLoading, setMembersLoading] = useState(true)
+  const [membersError, setMembersError] = useState<string | null>(null)
+  const [updatingMember, setUpdatingMember] = useState<number | null>(null)
+
+  // Relationship types state
+  const [relationshipTypes, setRelationshipTypes] = useState<RelationshipType[]>([])
+  const [relTypesLoading, setRelTypesLoading] = useState(true)
+  const [relTypesError, setRelTypesError] = useState<string | null>(null)
+
+  // Modal states
+  const [showCreateRelTypeModal, setShowCreateRelTypeModal] = useState(false)
+  const [showEditRelTypeModal, setShowEditRelTypeModal] = useState(false)
+  const [showDeleteConfirmModal, setShowDeleteConfirmModal] = useState(false)
+  const [selectedRelType, setSelectedRelType] = useState<RelationshipType | null>(null)
+
+  // Relationship type form state
+  const [relTypeName, setRelTypeName] = useState('')
+  const [relTypeDesc, setRelTypeDesc] = useState('')
+  const [relTypeInverse, setRelTypeInverse] = useState('')
+  const [relTypeFormLoading, setRelTypeFormLoading] = useState(false)
+  const [relTypeFormError, setRelTypeFormError] = useState<string | null>(null)
+
+  // Check if user is admin
+  const isAdmin = user?.role_id === 3
+
+  // Redirect if not admin
+  useEffect(() => {
+    if (!isAdmin) {
+      navigate('/dashboard')
+    }
+  }, [isAdmin, navigate])
+
+  // Initialize project form
+  useEffect(() => {
+    if (currentProject) {
+      setProjectName(currentProject.project_name)
+      setProjectDesc(currentProject.project_desc || '')
+    }
+  }, [currentProject])
+
+  // Fetch members and roles
+  useEffect(() => {
+    const fetchMembersAndRoles = async () => {
+      if (!currentProject) return
+
+      try {
+        setMembersLoading(true)
+        setMembersError(null)
+
+        const [fetchedMembers, fetchedRoles] = await Promise.all([
+          userService.getProjectMembers(currentProject.id),
+          userService.getRoles(),
+        ])
+
+        setMembers(fetchedMembers)
+        setRoles(fetchedRoles)
+      } catch (err) {
+        console.error('Failed to fetch members:', err)
+        setMembersError('Failed to load project members')
+      } finally {
+        setMembersLoading(false)
+      }
+    }
+
+    fetchMembersAndRoles()
+  }, [currentProject])
+
+  // Fetch relationship types
+  useEffect(() => {
+    const fetchRelTypes = async () => {
+      if (!currentProject) return
+
+      try {
+        setRelTypesLoading(true)
+        setRelTypesError(null)
+
+        const fetchedTypes = await relationshipService.getRelationshipTypes(currentProject.id)
+        setRelationshipTypes(fetchedTypes)
+      } catch (err) {
+        console.error('Failed to fetch relationship types:', err)
+        setRelTypesError('Failed to load relationship types')
+      } finally {
+        setRelTypesLoading(false)
+      }
+    }
+
+    fetchRelTypes()
+  }, [currentProject])
+
+  // Handle project update
+  const handleProjectUpdate = async (e: React.FormEvent) => {
+    e.preventDefault()
+    if (!currentProject) return
+
+    try {
+      setProjectLoading(true)
+      setProjectError(null)
+      setProjectSuccess(null)
+
+      const updatedProject = await projectService.updateProject(currentProject.id, {
+        project_name: projectName.trim(),
+        project_desc: projectDesc.trim() || undefined,
+      })
+
+      setCurrentProject(updatedProject)
+      setProjectSuccess('Project updated successfully!')
+      setTimeout(() => setProjectSuccess(null), 3000)
+    } catch (err) {
+      console.error('Failed to update project:', err)
+      setProjectError('Failed to update project')
+    } finally {
+      setProjectLoading(false)
+    }
+  }
+
+  // Handle member role update
+  const handleRoleUpdate = async (memberId: number, newRoleId: number) => {
+    if (!currentProject) return
+
+    // Prevent self-demotion
+    if (memberId === user?.db_user_id && newRoleId !== 3) {
+      setMembersError('You cannot demote yourself. Ask another admin to change your role.')
+      setTimeout(() => setMembersError(null), 5000)
+      return
+    }
+
+    try {
+      setUpdatingMember(memberId)
+      setMembersError(null)
+
+      const updatedMember = await userService.updateMemberRole(
+        currentProject.id,
+        memberId,
+        newRoleId
+      )
+
+      setMembers((prev) =>
+        prev.map((m) => (m.id === memberId ? updatedMember : m))
+      )
+    } catch (err: any) {
+      console.error('Failed to update member role:', err)
+      setMembersError(err.message || 'Failed to update member role')
+      setTimeout(() => setMembersError(null), 5000)
+    } finally {
+      setUpdatingMember(null)
+    }
+  }
+
+  // Handle create relationship type
+  const handleCreateRelType = async (e: React.FormEvent) => {
+    e.preventDefault()
+    if (!currentProject) return
+
+    try {
+      setRelTypeFormLoading(true)
+      setRelTypeFormError(null)
+
+      const newType = await relationshipService.createRelationshipType(currentProject.id, {
+        type_name: relTypeName.trim(),
+        type_description: relTypeDesc.trim() || null,
+        inverse_type_name: relTypeInverse.trim() || null,
+      })
+
+      setRelationshipTypes((prev) => [...prev, newType])
+      setShowCreateRelTypeModal(false)
+      resetRelTypeForm()
+    } catch (err: any) {
+      console.error('Failed to create relationship type:', err)
+      setRelTypeFormError(err.message || 'Failed to create relationship type')
+    } finally {
+      setRelTypeFormLoading(false)
+    }
+  }
+
+  // Handle update relationship type
+  const handleUpdateRelType = async (e: React.FormEvent) => {
+    e.preventDefault()
+    if (!currentProject || !selectedRelType) return
+
+    try {
+      setRelTypeFormLoading(true)
+      setRelTypeFormError(null)
+
+      const updatedType = await relationshipService.updateRelationshipType(
+        currentProject.id,
+        selectedRelType.id,
+        {
+          type_name: relTypeName.trim() || null,
+          type_description: relTypeDesc.trim() || null,
+          inverse_type_name: relTypeInverse.trim() || null,
+        }
+      )
+
+      setRelationshipTypes((prev) =>
+        prev.map((t) => (t.id === selectedRelType.id ? updatedType : t))
+      )
+      setShowEditRelTypeModal(false)
+      setSelectedRelType(null)
+      resetRelTypeForm()
+    } catch (err: any) {
+      console.error('Failed to update relationship type:', err)
+      setRelTypeFormError(err.message || 'Failed to update relationship type')
+    } finally {
+      setRelTypeFormLoading(false)
+    }
+  }
+
+  // Handle delete relationship type
+  const handleDeleteRelType = async () => {
+    if (!currentProject || !selectedRelType) return
+
+    try {
+      setRelTypeFormLoading(true)
+      setRelTypeFormError(null)
+
+      await relationshipService.deleteRelationshipType(currentProject.id, selectedRelType.id)
+
+      setRelationshipTypes((prev) => prev.filter((t) => t.id !== selectedRelType.id))
+      setShowDeleteConfirmModal(false)
+      setSelectedRelType(null)
+    } catch (err: any) {
+      console.error('Failed to delete relationship type:', err)
+      setRelTypeFormError(err.message || 'Failed to delete relationship type')
+    } finally {
+      setRelTypeFormLoading(false)
+    }
+  }
+
+  // Reset relationship type form
+  const resetRelTypeForm = () => {
+    setRelTypeName('')
+    setRelTypeDesc('')
+    setRelTypeInverse('')
+    setRelTypeFormError(null)
+  }
+
+  // Open edit modal
+  const openEditModal = (relType: RelationshipType) => {
+    setSelectedRelType(relType)
+    setRelTypeName(relType.type_name)
+    setRelTypeDesc(relType.type_description || '')
+    setRelTypeInverse(relType.inverse_type_name || '')
+    setRelTypeFormError(null)
+    setShowEditRelTypeModal(true)
+  }
+
+  // Open delete modal
+  const openDeleteModal = (relType: RelationshipType) => {
+    setSelectedRelType(relType)
+    setRelTypeFormError(null)
+    setShowDeleteConfirmModal(true)
+  }
+
+  if (!isAdmin) {
+    return null
+  }
+
+  if (!currentProject) {
+    return (
+      <div className="min-h-screen bg-white flex items-center justify-center">
+        <div className="text-center">
+          <h2 className="text-xl font-semibold text-gray-700 mb-2">No Project Selected</h2>
+          <p className="text-gray-500 mb-4">Please select a project from the dashboard first.</p>
+          <button
+            onClick={() => navigate('/dashboard')}
+            className="px-4 py-2 bg-teal-600 text-white rounded hover:bg-teal-700"
+          >
+            Go to Dashboard
+          </button>
+        </div>
+      </div>
+    )
+  }
+
+  return (
+    <div className="min-h-screen bg-white">
+      {/* Header */}
+      <header className="py-6 text-center border-b border-gray-200">
+        <h1 className="text-3xl font-semibold text-teal-700">Admin Panel</h1>
+        <p className="text-gray-500 mt-1">
+          Managing: <span className="font-medium">{currentProject.project_name}</span>
+        </p>
+      </header>
+
+      {/* Navigation */}
+      <div className="border-b border-gray-200">
+        <div className="max-w-4xl mx-auto px-8">
+          <nav className="flex gap-8">
+            <button
+              onClick={() => setActiveTab('project')}
+              className={`py-4 px-2 border-b-2 font-medium text-sm transition-colors ${
+                activeTab === 'project'
+                  ? 'border-teal-600 text-teal-600'
+                  : 'border-transparent text-gray-500 hover:text-gray-700'
+              }`}
+            >
+              Project Settings
+            </button>
+            <button
+              onClick={() => setActiveTab('members')}
+              className={`py-4 px-2 border-b-2 font-medium text-sm transition-colors ${
+                activeTab === 'members'
+                  ? 'border-teal-600 text-teal-600'
+                  : 'border-transparent text-gray-500 hover:text-gray-700'
+              }`}
+            >
+              Member Roles
+            </button>
+            <button
+              onClick={() => setActiveTab('relationships')}
+              className={`py-4 px-2 border-b-2 font-medium text-sm transition-colors ${
+                activeTab === 'relationships'
+                  ? 'border-teal-600 text-teal-600'
+                  : 'border-transparent text-gray-500 hover:text-gray-700'
+              }`}
+            >
+              Relationship Types
+            </button>
+          </nav>
+        </div>
+      </div>
+
+      {/* Back Button */}
+      <div className="max-w-4xl mx-auto px-8 pt-6">
+        <button
+          onClick={() => navigate('/dashboard')}
+          className="flex items-center gap-2 text-gray-600 hover:text-gray-800"
+        >
+          <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 19l-7-7 7-7" />
+          </svg>
+          Back to Dashboard
+        </button>
+      </div>
+
+      {/* Content */}
+      <div className="max-w-4xl mx-auto px-8 py-8">
+        {/* Project Settings Tab */}
+        {activeTab === 'project' && (
+          <div className="bg-white border border-gray-200 rounded-lg p-6">
+            <h2 className="text-xl font-semibold text-gray-800 mb-6">Project Settings</h2>
+
+            <form onSubmit={handleProjectUpdate} className="space-y-6">
+              {projectError && (
+                <div className="p-3 bg-red-100 border border-red-400 text-red-700 rounded text-sm">
+                  {projectError}
+                </div>
+              )}
+
+              {projectSuccess && (
+                <div className="p-3 bg-green-100 border border-green-400 text-green-700 rounded text-sm">
+                  {projectSuccess}
+                </div>
+              )}
+
+              <div>
+                <label className="block text-sm font-medium text-gray-700 mb-1">
+                  Project Name <span className="text-red-500">*</span>
+                </label>
+                <input
+                  type="text"
+                  value={projectName}
+                  onChange={(e) => setProjectName(e.target.value)}
+                  className="w-full px-3 py-2 border border-gray-300 rounded text-sm focus:outline-none focus:ring-2 focus:ring-teal-500"
+                  required
+                />
+              </div>
+
+              <div>
+                <label className="block text-sm font-medium text-gray-700 mb-1">
+                  Description
+                </label>
+                <textarea
+                  value={projectDesc}
+                  onChange={(e) => setProjectDesc(e.target.value)}
+                  rows={4}
+                  className="w-full px-3 py-2 border border-gray-300 rounded text-sm focus:outline-none focus:ring-2 focus:ring-teal-500 resize-none"
+                />
+              </div>
+
+              <div className="flex justify-end">
+                <button
+                  type="submit"
+                  disabled={projectLoading}
+                  className="px-4 py-2 bg-teal-600 text-white rounded text-sm font-medium hover:bg-teal-700 disabled:opacity-50"
+                >
+                  {projectLoading ? 'Saving...' : 'Save Changes'}
+                </button>
+              </div>
+            </form>
+          </div>
+        )}
+
+        {/* Members Tab */}
+        {activeTab === 'members' && (
+          <div className="bg-white border border-gray-200 rounded-lg p-6">
+            <h2 className="text-xl font-semibold text-gray-800 mb-6">Member Roles</h2>
+
+            {membersError && (
+              <div className="mb-4 p-3 bg-red-100 border border-red-400 text-red-700 rounded text-sm">
+                {membersError}
+              </div>
+            )}
+
+            {membersLoading ? (
+              <div className="text-center py-8 text-gray-500">Loading members...</div>
+            ) : members.length === 0 ? (
+              <div className="text-center py-8 text-gray-500">No members found</div>
+            ) : (
+              <div className="overflow-x-auto">
+                <table className="w-full">
+                  <thead>
+                    <tr className="border-b border-gray-200">
+                      <th className="text-left py-3 px-4 font-medium text-gray-700">User</th>
+                      <th className="text-left py-3 px-4 font-medium text-gray-700">Role</th>
+                      <th className="text-left py-3 px-4 font-medium text-gray-700">Actions</th>
+                    </tr>
+                  </thead>
+                  <tbody>
+                    {members.map((member) => {
+                      const isCurrentUser = member.id === user?.db_user_id
+
+                      return (
+                        <tr key={member.id} className="border-b border-gray-100">
+                          <td className="py-3 px-4">
+                            <div className="flex items-center gap-2">
+                              <span className="text-sm text-gray-900">{member.sub}</span>
+                              {isCurrentUser && (
+                                <span className="text-xs bg-teal-100 text-teal-700 px-2 py-0.5 rounded">
+                                  You
+                                </span>
+                              )}
+                            </div>
+                          </td>
+                          <td className="py-3 px-4">
+                            <span
+                              className={`text-xs px-2 py-1 rounded ${
+                                member.role_name === 'admin'
+                                  ? 'bg-purple-100 text-purple-700'
+                                  : member.role_name === 'auditor'
+                                  ? 'bg-blue-100 text-blue-700'
+                                  : 'bg-gray-100 text-gray-700'
+                              }`}
+                            >
+                              {member.role_display_name}
+                            </span>
+                          </td>
+                          <td className="py-3 px-4">
+                            <select
+                              value={member.role_id}
+                              onChange={(e) => handleRoleUpdate(member.id, parseInt(e.target.value))}
+                              disabled={updatingMember === member.id || (isCurrentUser && member.role_id === 3)}
+                              className={`px-3 py-1.5 border border-gray-300 rounded text-sm focus:outline-none focus:ring-2 focus:ring-teal-500 ${
+                                isCurrentUser && member.role_id === 3 ? 'bg-gray-100 cursor-not-allowed' : ''
+                              }`}
+                              title={isCurrentUser && member.role_id === 3 ? 'You cannot demote yourself' : ''}
+                            >
+                              {roles.map((role) => (
+                                <option key={role.id} value={role.id}>
+                                  {role.display_name}
+                                </option>
+                              ))}
+                            </select>
+                            {updatingMember === member.id && (
+                              <span className="ml-2 text-xs text-gray-500">Saving...</span>
+                            )}
+                          </td>
+                        </tr>
+                      )
+                    })}
+                  </tbody>
+                </table>
+              </div>
+            )}
+          </div>
+        )}
+
+        {/* Relationship Types Tab */}
+        {activeTab === 'relationships' && (
+          <div className="bg-white border border-gray-200 rounded-lg p-6">
+            <div className="flex items-center justify-between mb-6">
+              <h2 className="text-xl font-semibold text-gray-800">Relationship Types</h2>
+              <button
+                onClick={() => {
+                  resetRelTypeForm()
+                  setShowCreateRelTypeModal(true)
+                }}
+                className="px-4 py-2 bg-teal-600 text-white rounded text-sm font-medium hover:bg-teal-700"
+              >
+                + Add Type
+              </button>
+            </div>
+
+            {relTypesError && (
+              <div className="mb-4 p-3 bg-red-100 border border-red-400 text-red-700 rounded text-sm">
+                {relTypesError}
+              </div>
+            )}
+
+            {relTypesLoading ? (
+              <div className="text-center py-8 text-gray-500">Loading relationship types...</div>
+            ) : relationshipTypes.length === 0 ? (
+              <div className="text-center py-8 text-gray-500">
+                No relationship types defined yet. Create one to link requirements.
+              </div>
+            ) : (
+              <div className="space-y-3">
+                {relationshipTypes.map((relType) => (
+                  <div
+                    key={relType.id}
+                    className="flex items-center justify-between p-4 border border-gray-200 rounded-lg hover:bg-gray-50"
+                  >
+                    <div>
+                      <div className="font-medium text-gray-900">{relType.type_name}</div>
+                      {relType.inverse_type_name && (
+                        <div className="text-sm text-gray-500">
+                          Inverse: {relType.inverse_type_name}
+                        </div>
+                      )}
+                      {relType.type_description && (
+                        <div className="text-sm text-gray-400 mt-1">{relType.type_description}</div>
+                      )}
+                    </div>
+                    <div className="flex items-center gap-2">
+                      <button
+                        onClick={() => openEditModal(relType)}
+                        className="px-3 py-1.5 border border-gray-300 rounded text-sm text-gray-700 hover:bg-gray-100"
+                      >
+                        Edit
+                      </button>
+                      <button
+                        onClick={() => openDeleteModal(relType)}
+                        className="px-3 py-1.5 border border-red-300 rounded text-sm text-red-600 hover:bg-red-50"
+                      >
+                        Delete
+                      </button>
+                    </div>
+                  </div>
+                ))}
+              </div>
+            )}
+          </div>
+        )}
+      </div>
+
+      {/* Create Relationship Type Modal */}
+      {showCreateRelTypeModal && (
+        <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50">
+          <div className="bg-white rounded-lg shadow-xl w-full max-w-md mx-4">
+            <div className="flex items-center justify-between px-6 py-4 border-b border-gray-200">
+              <h2 className="text-xl font-semibold text-gray-800">Create Relationship Type</h2>
+              <button
+                onClick={() => {
+                  setShowCreateRelTypeModal(false)
+                  resetRelTypeForm()
+                }}
+                className="text-gray-400 hover:text-gray-600"
+              >
+                <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
+                </svg>
+              </button>
+            </div>
+
+            <form onSubmit={handleCreateRelType}>
+              <div className="px-6 py-4 space-y-4">
+                {relTypeFormError && (
+                  <div className="p-3 bg-red-100 border border-red-400 text-red-700 rounded text-sm">
+                    {relTypeFormError}
+                  </div>
+                )}
+
+                <div>
+                  <label className="block text-sm font-medium text-gray-700 mb-1">
+                    Type Name <span className="text-red-500">*</span>
+                  </label>
+                  <input
+                    type="text"
+                    value={relTypeName}
+                    onChange={(e) => setRelTypeName(e.target.value)}
+                    placeholder="e.g., Depends On"
+                    className="w-full px-3 py-2 border border-gray-300 rounded text-sm focus:outline-none focus:ring-2 focus:ring-teal-500"
+                    required
+                  />
+                </div>
+
+                <div>
+                  <label className="block text-sm font-medium text-gray-700 mb-1">
+                    Inverse Name
+                  </label>
+                  <input
+                    type="text"
+                    value={relTypeInverse}
+                    onChange={(e) => setRelTypeInverse(e.target.value)}
+                    placeholder="e.g., Depended By"
+                    className="w-full px-3 py-2 border border-gray-300 rounded text-sm focus:outline-none focus:ring-2 focus:ring-teal-500"
+                  />
+                  <p className="text-xs text-gray-500 mt-1">
+                    Optional. The name shown when viewing from the target requirement.
+                  </p>
+                </div>
+
+                <div>
+                  <label className="block text-sm font-medium text-gray-700 mb-1">
+                    Description
+                  </label>
+                  <textarea
+                    value={relTypeDesc}
+                    onChange={(e) => setRelTypeDesc(e.target.value)}
+                    rows={2}
+                    className="w-full px-3 py-2 border border-gray-300 rounded text-sm focus:outline-none focus:ring-2 focus:ring-teal-500 resize-none"
+                  />
+                </div>
+              </div>
+
+              <div className="flex justify-end gap-3 px-6 py-4 border-t border-gray-200 bg-gray-50 rounded-b-lg">
+                <button
+                  type="button"
+                  onClick={() => {
+                    setShowCreateRelTypeModal(false)
+                    resetRelTypeForm()
+                  }}
+                  className="px-4 py-2 border border-gray-400 rounded text-sm font-medium text-gray-700 hover:bg-gray-100"
+                  disabled={relTypeFormLoading}
+                >
+                  Cancel
+                </button>
+                <button
+                  type="submit"
+                  className="px-4 py-2 bg-teal-600 text-white rounded text-sm font-medium hover:bg-teal-700 disabled:opacity-50"
+                  disabled={relTypeFormLoading}
+                >
+                  {relTypeFormLoading ? 'Creating...' : 'Create'}
+                </button>
+              </div>
+            </form>
+          </div>
+        </div>
+      )}
+
+      {/* Edit Relationship Type Modal */}
+      {showEditRelTypeModal && selectedRelType && (
+        <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50">
+          <div className="bg-white rounded-lg shadow-xl w-full max-w-md mx-4">
+            <div className="flex items-center justify-between px-6 py-4 border-b border-gray-200">
+              <h2 className="text-xl font-semibold text-gray-800">Edit Relationship Type</h2>
+              <button
+                onClick={() => {
+                  setShowEditRelTypeModal(false)
+                  setSelectedRelType(null)
+                  resetRelTypeForm()
+                }}
+                className="text-gray-400 hover:text-gray-600"
+              >
+                <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
+                </svg>
+              </button>
+            </div>
+
+            <form onSubmit={handleUpdateRelType}>
+              <div className="px-6 py-4 space-y-4">
+                {relTypeFormError && (
+                  <div className="p-3 bg-red-100 border border-red-400 text-red-700 rounded text-sm">
+                    {relTypeFormError}
+                  </div>
+                )}
+
+                <div>
+                  <label className="block text-sm font-medium text-gray-700 mb-1">
+                    Type Name <span className="text-red-500">*</span>
+                  </label>
+                  <input
+                    type="text"
+                    value={relTypeName}
+                    onChange={(e) => setRelTypeName(e.target.value)}
+                    className="w-full px-3 py-2 border border-gray-300 rounded text-sm focus:outline-none focus:ring-2 focus:ring-teal-500"
+                    required
+                  />
+                </div>
+
+                <div>
+                  <label className="block text-sm font-medium text-gray-700 mb-1">
+                    Inverse Name
+                  </label>
+                  <input
+                    type="text"
+                    value={relTypeInverse}
+                    onChange={(e) => setRelTypeInverse(e.target.value)}
+                    className="w-full px-3 py-2 border border-gray-300 rounded text-sm focus:outline-none focus:ring-2 focus:ring-teal-500"
+                  />
+                </div>
+
+                <div>
+                  <label className="block text-sm font-medium text-gray-700 mb-1">
+                    Description
+                  </label>
+                  <textarea
+                    value={relTypeDesc}
+                    onChange={(e) => setRelTypeDesc(e.target.value)}
+                    rows={2}
+                    className="w-full px-3 py-2 border border-gray-300 rounded text-sm focus:outline-none focus:ring-2 focus:ring-teal-500 resize-none"
+                  />
+                </div>
+              </div>
+
+              <div className="flex justify-end gap-3 px-6 py-4 border-t border-gray-200 bg-gray-50 rounded-b-lg">
+                <button
+                  type="button"
+                  onClick={() => {
+                    setShowEditRelTypeModal(false)
+                    setSelectedRelType(null)
+                    resetRelTypeForm()
+                  }}
+                  className="px-4 py-2 border border-gray-400 rounded text-sm font-medium text-gray-700 hover:bg-gray-100"
+                  disabled={relTypeFormLoading}
+                >
+                  Cancel
+                </button>
+                <button
+                  type="submit"
+                  className="px-4 py-2 bg-teal-600 text-white rounded text-sm font-medium hover:bg-teal-700 disabled:opacity-50"
+                  disabled={relTypeFormLoading}
+                >
+                  {relTypeFormLoading ? 'Saving...' : 'Save Changes'}
+                </button>
+              </div>
+            </form>
+          </div>
+        </div>
+      )}
+
+      {/* Delete Confirmation Modal */}
+      {showDeleteConfirmModal && selectedRelType && (
+        <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50">
+          <div className="bg-white rounded-lg shadow-xl w-full max-w-md mx-4">
+            <div className="px-6 py-4 border-b border-gray-200">
+              <h2 className="text-xl font-semibold text-gray-800">Delete Relationship Type</h2>
+            </div>
+
+            <div className="px-6 py-4">
+              {relTypeFormError && (
+                <div className="mb-4 p-3 bg-red-100 border border-red-400 text-red-700 rounded text-sm">
+                  {relTypeFormError}
+                </div>
+              )}
+
+              <p className="text-gray-700">
+                Are you sure you want to delete the relationship type{' '}
+                <span className="font-semibold">"{selectedRelType.type_name}"</span>?
+              </p>
+              <p className="text-sm text-red-600 mt-2">
+                ⚠️ This will also delete all requirement links using this type.
+              </p>
+            </div>
+
+            <div className="flex justify-end gap-3 px-6 py-4 border-t border-gray-200 bg-gray-50 rounded-b-lg">
+              <button
+                onClick={() => {
+                  setShowDeleteConfirmModal(false)
+                  setSelectedRelType(null)
+                  setRelTypeFormError(null)
+                }}
+                className="px-4 py-2 border border-gray-400 rounded text-sm font-medium text-gray-700 hover:bg-gray-100"
+                disabled={relTypeFormLoading}
+              >
+                Cancel
+              </button>
+              <button
+                onClick={handleDeleteRelType}
+                className="px-4 py-2 bg-red-600 text-white rounded text-sm font-medium hover:bg-red-700 disabled:opacity-50"
+                disabled={relTypeFormLoading}
+              >
+                {relTypeFormLoading ? 'Deleting...' : 'Delete'}
+              </button>
+            </div>
+          </div>
+        </div>
+      )}
+    </div>
+  )
+}

frontend/src/pages/DashboardPage.tsx

@@ -233,10 +233,15 @@ export default function DashboardPage() {
             <span>Portuguese</span>
           </div>
 
-          {/* Admin Panel Button */}
+          {/* Admin Panel Button - Only visible for admins (role_id=3) */}
-          <button className="px-4 py-1.5 border border-gray-400 rounded text-sm font-medium text-gray-700 hover:bg-gray-50">
+          {user?.role_id === 3 && (
-            Admin Panel
+            <button 
-          </button>
+              onClick={() => navigate('/admin')}
+              className="px-4 py-1.5 border border-gray-400 rounded text-sm font-medium text-gray-700 hover:bg-gray-50"
+            >
+              Admin Panel
+            </button>
+          )}
 
           {/* User Info */}
           <div className="flex items-center gap-3">

frontend/src/pages/index.ts

@@ -2,3 +2,4 @@ export { default as HomePage } from './HomePage'
 export { default as DashboardPage } from './DashboardPage'
 export { default as RequirementsPage } from './RequirementsPage'
 export { default as RequirementDetailPage } from './RequirementDetailPage'
+export { default as AdminPage } from './AdminPage'

frontend/src/services/index.ts

@@ -15,5 +15,9 @@ export type {
   RelationshipType, 
   RequirementLink, 
   RequirementSearchResult,
-  RequirementLinkCreateRequest 
+  RequirementLinkCreateRequest,
+  RelationshipTypeCreateRequest,
+  RelationshipTypeUpdateRequest
 } from './relationshipService'
+export { userService } from './userService'
+export type { Role, ProjectMember, UserRoleUpdateRequest } from './userService'

frontend/src/services/relationshipService.ts

@@ -38,6 +38,18 @@ export interface RequirementLinkCreateRequest {
   target_requirement_id: number
 }
 
+export interface RelationshipTypeCreateRequest {
+  type_name: string
+  type_description?: string | null
+  inverse_type_name?: string | null
+}
+
+export interface RelationshipTypeUpdateRequest {
+  type_name?: string | null
+  type_description?: string | null
+  inverse_type_name?: string | null
+}
+
 class RelationshipService {
   /**
    * Get all relationship types for a project.
@@ -58,6 +70,79 @@ class RelationshipService {
     return await response.json()
   }
 
+  /**
+   * Create a new relationship type for a project.
+   */
+  async createRelationshipType(
+    projectId: number,
+    data: RelationshipTypeCreateRequest
+  ): Promise<RelationshipType> {
+    const response = await fetch(`${API_BASE_URL}/projects/${projectId}/relationship-types`, {
+      method: 'POST',
+      credentials: 'include',
+      headers: {
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify(data),
+    })
+
+    if (!response.ok) {
+      const errorData = await response.json().catch(() => ({}))
+      throw new Error(errorData.detail || `HTTP error! status: ${response.status}`)
+    }
+
+    return await response.json()
+  }
+
+  /**
+   * Update a relationship type.
+   */
+  async updateRelationshipType(
+    projectId: number,
+    typeId: number,
+    data: RelationshipTypeUpdateRequest
+  ): Promise<RelationshipType> {
+    const response = await fetch(
+      `${API_BASE_URL}/projects/${projectId}/relationship-types/${typeId}`,
+      {
+        method: 'PUT',
+        credentials: 'include',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify(data),
+      }
+    )
+
+    if (!response.ok) {
+      const errorData = await response.json().catch(() => ({}))
+      throw new Error(errorData.detail || `HTTP error! status: ${response.status}`)
+    }
+
+    return await response.json()
+  }
+
+  /**
+   * Delete a relationship type.
+   */
+  async deleteRelationshipType(projectId: number, typeId: number): Promise<void> {
+    const response = await fetch(
+      `${API_BASE_URL}/projects/${projectId}/relationship-types/${typeId}`,
+      {
+        method: 'DELETE',
+        credentials: 'include',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+      }
+    )
+
+    if (!response.ok) {
+      const errorData = await response.json().catch(() => ({}))
+      throw new Error(errorData.detail || `HTTP error! status: ${response.status}`)
+    }
+  }
+
   /**
    * Search requirements by name or tag code (for autocomplete).
    */

frontend/src/services/userService.ts

@@ -0,0 +1,91 @@
+const API_BASE_URL = '/api'
+
+// Types
+export interface Role {
+  id: number
+  role_name: string
+  display_name: string
+}
+
+export interface ProjectMember {
+  id: number
+  sub: string
+  role_id: number
+  role_name: string
+  role_display_name: string
+  created_at: string | null
+}
+
+export interface UserRoleUpdateRequest {
+  role_id: number
+}
+
+class UserService {
+  /**
+   * Get all available roles.
+   */
+  async getRoles(): Promise<Role[]> {
+    const response = await fetch(`${API_BASE_URL}/roles`, {
+      method: 'GET',
+      credentials: 'include',
+      headers: {
+        'Content-Type': 'application/json',
+      },
+    })
+
+    if (!response.ok) {
+      throw new Error(`HTTP error! status: ${response.status}`)
+    }
+
+    return await response.json()
+  }
+
+  /**
+   * Get all members of a project with their role info.
+   */
+  async getProjectMembers(projectId: number): Promise<ProjectMember[]> {
+    const response = await fetch(`${API_BASE_URL}/projects/${projectId}/members`, {
+      method: 'GET',
+      credentials: 'include',
+      headers: {
+        'Content-Type': 'application/json',
+      },
+    })
+
+    if (!response.ok) {
+      throw new Error(`HTTP error! status: ${response.status}`)
+    }
+
+    return await response.json()
+  }
+
+  /**
+   * Update a project member's role.
+   */
+  async updateMemberRole(
+    projectId: number,
+    userId: number,
+    roleId: number
+  ): Promise<ProjectMember> {
+    const response = await fetch(
+      `${API_BASE_URL}/projects/${projectId}/members/${userId}/role`,
+      {
+        method: 'PUT',
+        credentials: 'include',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({ role_id: roleId }),
+      }
+    )
+
+    if (!response.ok) {
+      const errorData = await response.json().catch(() => ({}))
+      throw new Error(errorData.detail || `HTTP error! status: ${response.status}`)
+    }
+
+    return await response.json()
+  }
+}
+
+export const userService = new UserService()