feat: enhance session management with sharing capabilities, real-time event synchronization, and UI updates for session display

prisma/schema.prisma

@@ -10,26 +10,30 @@ datasource db {
 }
 
 model User {
-  id        String    @id @default(cuid())
-  email     String    @unique
-  name      String?
-  password  String
-  sessions  Session[]
-  createdAt DateTime  @default(now())
-  updatedAt DateTime  @updatedAt
+  id            String         @id @default(cuid())
+  email         String         @unique
+  name          String?
+  password      String
+  sessions      Session[]
+  sharedSessions SessionShare[]
+  sessionEvents SessionEvent[]
+  createdAt     DateTime       @default(now())
+  updatedAt     DateTime       @updatedAt
 }
 
 model Session {
-  id           String     @id @default(cuid())
+  id           String         @id @default(cuid())
   title        String
   collaborator String
-  date         DateTime   @default(now())
+  date         DateTime       @default(now())
   userId       String
-  user         User       @relation(fields: [userId], references: [id], onDelete: Cascade)
+  user         User           @relation(fields: [userId], references: [id], onDelete: Cascade)
   items        SwotItem[]
   actions      Action[]
-  createdAt    DateTime   @default(now())
-  updatedAt    DateTime   @updatedAt
+  shares       SessionShare[]
+  events       SessionEvent[]
+  createdAt    DateTime       @default(now())
+  updatedAt    DateTime       @updatedAt
 
   @@index([userId])
 }
@@ -82,3 +86,39 @@ model ActionLink {
   @@index([actionId])
   @@index([swotItemId])
 }
+
+// ============================================
+// Collaboration & Real-time
+// ============================================
+
+enum ShareRole {
+  VIEWER
+  EDITOR
+}
+
+model SessionShare {
+  id        String    @id @default(cuid())
+  sessionId String
+  session   Session   @relation(fields: [sessionId], references: [id], onDelete: Cascade)
+  userId    String
+  user      User      @relation(fields: [userId], references: [id], onDelete: Cascade)
+  role      ShareRole @default(EDITOR)
+  createdAt DateTime  @default(now())
+
+  @@unique([sessionId, userId])
+  @@index([sessionId])
+  @@index([userId])
+}
+
+model SessionEvent {
+  id        String   @id @default(cuid())
+  sessionId String
+  session   Session  @relation(fields: [sessionId], references: [id], onDelete: Cascade)
+  userId    String
+  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
+  type      String   // ITEM_CREATED, ITEM_UPDATED, ITEM_DELETED, ACTION_CREATED, etc.
+  payload   String   // JSON payload
+  createdAt DateTime @default(now())
+
+  @@index([sessionId, createdAt])
+}