feat: add workspace management features including member invitations and role updates

- Implemented API endpoints for managing workspace members (GET, POST, PATCH, DELETE).
- Added workspace creation and retrieval functionalities.
- Enhanced project model to associate with workspaces.
- Updated project member roles and access control logic.
- Created sign-out page and updated authentication flow.
- Modified header to include navigation to workspaces.
- Updated Prisma schema to include workspace and member models.
- Seed script updated to create demo workspaces and associated members.

prisma/schema.prisma

@@ -23,11 +23,13 @@ model User {
   updatedAt     DateTime  @updatedAt
 
   // Relations
-  accounts      Account[]
-  sessions      Session[]
-  projects      Project[]
-  comments      Comment[]
-  memberships   ProjectMember[]
+  accounts           Account[]
+  sessions           Session[]
+  ownedWorkspaces    Workspace[]
+  workspaceMemberships WorkspaceMember[]
+  projects           Project[]
+  comments           Comment[]
+  projectMemberships ProjectMember[]
   
   @@map("users")
 }
@@ -76,6 +78,55 @@ model VerificationToken {
 // APPLICATION MODELS
 // ============================================
 
+// ---- Workspace ----
+
+model Workspace {
+  id          String   @id @default(cuid())
+  name        String
+  slug        String   @unique
+  description String?  @db.Text
+  
+  // Ownership
+  ownerId     String
+  owner       User     @relation(fields: [ownerId], references: [id], onDelete: Cascade)
+  
+  // Timestamps
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+  
+  // Relations
+  members     WorkspaceMember[]
+  projects    Project[]
+  
+  @@index([ownerId])
+  @@index([slug])
+  @@map("workspaces")
+}
+
+model WorkspaceMember {
+  id          String              @id @default(cuid())
+  role        WorkspaceMemberRole @default(COMMENTATOR)
+  
+  workspaceId String
+  workspace   Workspace @relation(fields: [workspaceId], references: [id], onDelete: Cascade)
+  
+  userId      String
+  user        User      @relation(fields: [userId], references: [id], onDelete: Cascade)
+  
+  createdAt   DateTime  @default(now())
+  
+  @@unique([workspaceId, userId])
+  @@index([userId])
+  @@map("workspace_members")
+}
+
+enum WorkspaceMemberRole {
+  ADMIN        // Full access: manage members, delete projects, etc.
+  COMMENTATOR  // Can view all projects and comment only
+}
+
+// ---- Project ----
+
 model Project {
   id          String   @id @default(cuid())
   name        String
@@ -89,6 +140,10 @@ model Project {
   ownerId     String
   owner       User     @relation(fields: [ownerId], references: [id], onDelete: Cascade)
   
+  // Workspace (required - every project belongs to a workspace)
+  workspaceId String
+  workspace   Workspace @relation(fields: [workspaceId], references: [id], onDelete: Cascade)
+  
   // Timestamps
   createdAt   DateTime @default(now())
   updatedAt   DateTime @updatedAt
@@ -100,6 +155,7 @@ model Project {
   
   @@index([ownerId])
   @@index([slug])
+  @@index([workspaceId])
   @@map("projects")
 }
 
@@ -111,7 +167,7 @@ enum ProjectVisibility {
 
 model ProjectMember {
   id        String            @id @default(cuid())
-  role      ProjectMemberRole @default(VIEWER)
+  role      ProjectMemberRole @default(COMMENTATOR)
   
   projectId String
   project   Project @relation(fields: [projectId], references: [id], onDelete: Cascade)
@@ -127,9 +183,8 @@ model ProjectMember {
 }
 
 enum ProjectMemberRole {
-  VIEWER     // Can view and comment
-  EDITOR     // Can add/edit videos
-  ADMIN      // Can manage members and settings
+  ADMIN        // Can manage members, settings, delete videos
+  COMMENTATOR  // Can view and comment only
 }
 
 model Video {

prisma/seed.ts

@@ -1,4 +1,5 @@
-import { PrismaClient, ProjectVisibility, ProjectMemberRole, SharePermission } from '@prisma/client';
+import 'dotenv/config';
+import { PrismaClient, ProjectVisibility, ProjectMemberRole, SharePermission, WorkspaceMemberRole } from '@prisma/client';
 import { PrismaPg } from '@prisma/adapter-pg';
 import pg from 'pg';
 
@@ -21,6 +22,8 @@ async function main() {
     await prisma.shareLink.deleteMany();
     await prisma.projectMember.deleteMany();
     await prisma.project.deleteMany();
+    await prisma.workspaceMember.deleteMany();
+    await prisma.workspace.deleteMany();
     await prisma.session.deleteMany();
     await prisma.account.deleteMany();
     await prisma.verificationToken.deleteMany();
@@ -57,7 +60,39 @@ async function main() {
 
     console.log('✓ Created 3 demo users');
 
-    // Create projects
+    // Create workspaces
+    const mainWorkspace = await prisma.workspace.create({
+        data: {
+            name: 'OpenFrame Studio',
+            slug: 'openframe-studio',
+            description: 'Main workspace for all video production projects',
+            ownerId: demoUser.id,
+            members: {
+                create: [
+                    { userId: collaborator.id, role: WorkspaceMemberRole.ADMIN },
+                    { userId: reviewer.id, role: WorkspaceMemberRole.COMMENTATOR },
+                ],
+            },
+        },
+    });
+
+    const clientWorkspace = await prisma.workspace.create({
+        data: {
+            name: 'XYZ Corp',
+            slug: 'xyz-corp',
+            description: 'Client workspace for XYZ Corporation projects',
+            ownerId: collaborator.id,
+            members: {
+                create: [
+                    { userId: demoUser.id, role: WorkspaceMemberRole.ADMIN },
+                ],
+            },
+        },
+    });
+
+    console.log('✓ Created 2 workspaces with members');
+
+    // Create projects (linked to workspace)
     const techProject = await prisma.project.create({
         data: {
             name: 'Tech Review Series',
@@ -65,10 +100,11 @@ async function main() {
             slug: 'tech-review-series',
             visibility: ProjectVisibility.PRIVATE,
             ownerId: demoUser.id,
+            workspaceId: mainWorkspace.id,
             members: {
                 create: [
-                    { userId: collaborator.id, role: ProjectMemberRole.EDITOR },
-                    { userId: reviewer.id, role: ProjectMemberRole.VIEWER },
+                    { userId: collaborator.id, role: ProjectMemberRole.ADMIN },
+                    { userId: reviewer.id, role: ProjectMemberRole.COMMENTATOR },
                 ],
             },
         },
@@ -81,6 +117,7 @@ async function main() {
             slug: 'programming-tutorials',
             visibility: ProjectVisibility.INVITE,
             ownerId: demoUser.id,
+            workspaceId: mainWorkspace.id,
         },
     });
 
@@ -91,6 +128,7 @@ async function main() {
             slug: 'xyz-corp-promo',
             visibility: ProjectVisibility.PRIVATE,
             ownerId: collaborator.id,
+            workspaceId: clientWorkspace.id,
             members: {
                 create: [{ userId: demoUser.id, role: ProjectMemberRole.ADMIN }],
             },
@@ -273,8 +311,8 @@ async function main() {
     console.log('\n✅ Seeding complete!\n');
     console.log('Demo accounts:');
     console.log('  - [email protected] (Owner)');
-    console.log('  - [email protected] (Editor)');
-    console.log('  - [email protected] (Viewer)');
+    console.log('  - [email protected] (Admin)');
+    console.log('  - [email protected] (Commentator)');
 }
 
 main()