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nextstep-features/treatment-milestones/IMPLEMENTATION.md

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+# Treatment Milestone Tracker Implementation
+
+## Database Schema Changes
+
+Add to prisma/schema.prisma:
+
+```prisma
+model TreatmentPlan {
+  id          String    @id @default(cuid())
+  workspaceId String    @unique
+  title       String    // e.g., "Grace's Chemotherapy Plan"
+  totalCycles Int
+  currentCycle Int      @default(0)
+  startDate   DateTime?
+  estimatedEnd DateTime?
+  status      String    @default("ACTIVE") // ACTIVE, PAUSED, COMPLETED
+  cycleType   String    @default("WEEKLY") // WEEKLY, BIWEEKLY, MONTHLY, CUSTOM
+  cycleDays   Int       @default(7)        // Days between cycles
+  createdAt   DateTime  @default(now())
+  updatedAt   DateTime  @updatedAt
+  createdById String
+  
+  workspace   Workspace @relation(fields: [workspaceId], references: [id], onDelete: Cascade)
+  createdBy   User      @relation(fields: [createdById], references: [id])
+  milestones  TreatmentMilestone[]
+}
+
+model TreatmentMilestone {
+  id          String    @id @default(cuid())
+  planId      String
+  cycleNumber Int       // Which cycle this milestone represents
+  date        DateTime  // When it happened (or estimated)
+  status      String    @default("UPCOMING") // UPCOMING, COMPLETED, SKIPPED
+  notes       String?   // Personal reflection
+  sideEffects String?   // What was experienced
+  celebratedAt DateTime? // When we showed the celebration
+  createdAt   DateTime  @default(now())
+  
+  plan        TreatmentPlan @relation(fields: [planId], references: [id], onDelete: Cascade)
+}
+```
+
+## API Routes
+
+### GET /api/workspaces/[id]/treatment-plan
+Get the treatment plan for a workspace
+
+### POST /api/workspaces/[id]/treatment-plan
+Create or update treatment plan
+
+### POST /api/workspaces/[id]/treatment-plan/milestones/[cycleNumber]/complete
+Mark a milestone as completed
+
+### GET /api/workspaces/[id]/treatment-plan/progress
+Get progress stats
+
+## Components
+
+- TreatmentProgress - Main progress widget
+- MilestoneCelebration - Celebration modal
+- TreatmentCalendar - Timeline view
+- CycleDetailView - Individual cycle details