feat: introduce Teams & OKRs feature with models, types, and UI components for team management and objective tracking

prisma/schema.prisma

@@ -25,6 +25,9 @@ model User {
   yearReviewSessions      YearReviewSession[]
   sharedYearReviewSessions YRSessionShare[]
   yearReviewSessionEvents  YRSessionEvent[]
+  // Teams & OKRs relations
+  createdTeams  Team[]
+  teamMembers   TeamMember[]
   createdAt     DateTime       @default(now())
   updatedAt     DateTime       @updatedAt
 }
@@ -274,3 +277,91 @@ model YRSessionEvent {
 
   @@index([sessionId, createdAt])
 }
+
+// ============================================
+// Teams & OKRs
+// ============================================
+
+enum TeamRole {
+  ADMIN
+  MEMBER
+}
+
+enum OKRStatus {
+  NOT_STARTED
+  IN_PROGRESS
+  COMPLETED
+  CANCELLED
+}
+
+enum KeyResultStatus {
+  NOT_STARTED
+  IN_PROGRESS
+  COMPLETED
+  AT_RISK
+}
+
+model Team {
+  id          String       @id @default(cuid())
+  name        String
+  description String?
+  createdById String
+  creator     User         @relation(fields: [createdById], references: [id], onDelete: Cascade)
+  members     TeamMember[]
+  createdAt   DateTime     @default(now())
+  updatedAt   DateTime     @updatedAt
+
+  @@index([createdById])
+}
+
+model TeamMember {
+  id        String   @id @default(cuid())
+  teamId    String
+  team      Team     @relation(fields: [teamId], references: [id], onDelete: Cascade)
+  userId    String
+  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
+  role      TeamRole @default(MEMBER)
+  okrs      OKR[]
+  joinedAt  DateTime @default(now())
+
+  @@unique([teamId, userId])
+  @@index([teamId])
+  @@index([userId])
+}
+
+model OKR {
+  id            String          @id @default(cuid())
+  teamMemberId String
+  teamMember    TeamMember      @relation(fields: [teamMemberId], references: [id], onDelete: Cascade)
+  objective     String
+  description   String?
+  period        String          // Q1 2025, Q2 2025, H1 2025, 2025, etc.
+  startDate     DateTime
+  endDate       DateTime
+  status        OKRStatus       @default(NOT_STARTED)
+  keyResults    KeyResult[]
+  createdAt     DateTime        @default(now())
+  updatedAt     DateTime        @updatedAt
+
+  @@index([teamMemberId])
+  @@index([teamMemberId, period])
+  @@index([status])
+}
+
+model KeyResult {
+  id           String           @id @default(cuid())
+  okrId        String
+  okr          OKR              @relation(fields: [okrId], references: [id], onDelete: Cascade)
+  title        String
+  targetValue  Float
+  currentValue Float            @default(0)
+  unit         String           @default("%") // %, nombre, etc.
+  status       KeyResultStatus  @default(NOT_STARTED)
+  order        Int              @default(0)
+  notes        String?
+  createdAt    DateTime         @default(now())
+  updatedAt    DateTime         @updatedAt
+
+  @@index([okrId])
+  @@index([okrId, order])
+}