Add lessons Phase 6: lesson plans with curriculum tracking

Structured lesson plans with nested sections and items per enrollment.
Deep create in one request, one-active-per-enrollment constraint,
auto-set startedDate/masteredDate on status transitions, progress %
calculation (skipped items excluded). 8 new tests (84 total).

packages/backend/src/routes/v1/lessons.ts

@@ -15,8 +15,11 @@ import {
   LessonSessionUpdateSchema,
   GradingScaleCreateSchema,
   GradingScaleUpdateSchema,
+  LessonPlanCreateSchema,
+  LessonPlanUpdateSchema,
+  LessonPlanItemUpdateSchema,
 } from '@lunarfront/shared/schemas'
-import { InstructorService, LessonTypeService, ScheduleSlotService, EnrollmentService, LessonSessionService, GradingScaleService } from '../../services/lesson.service.js'
+import { InstructorService, LessonTypeService, ScheduleSlotService, EnrollmentService, LessonSessionService, GradingScaleService, LessonPlanService, LessonPlanItemService } from '../../services/lesson.service.js'
 
 export const lessonRoutes: FastifyPluginAsync = async (app) => {
   // --- Instructors ---
@@ -322,4 +325,58 @@ export const lessonRoutes: FastifyPluginAsync = async (app) => {
     if (!scale) return reply.status(404).send({ error: { message: 'Grading scale not found', statusCode: 404 } })
     return reply.send(scale)
   })
+
+  // --- Lesson Plans ---
+
+  app.post('/lesson-plans', { preHandler: [app.authenticate, app.requirePermission('lessons.edit')] }, async (request, reply) => {
+    const parsed = LessonPlanCreateSchema.safeParse(request.body)
+    if (!parsed.success) {
+      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
+    }
+    const plan = await LessonPlanService.create(app.db, parsed.data, request.user.id)
+    return reply.status(201).send(plan)
+  })
+
+  app.get('/lesson-plans', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
+    const query = request.query as Record<string, string | undefined>
+    const params = PaginationSchema.parse(query)
+    const filters = {
+      enrollmentId: query.enrollmentId,
+      memberId: query.memberId,
+      isActive: query.isActive === 'true' ? true : query.isActive === 'false' ? false : undefined,
+    }
+    const result = await LessonPlanService.list(app.db, params, filters)
+    return reply.send(result)
+  })
+
+  app.get('/lesson-plans/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.view')] }, async (request, reply) => {
+    const { id } = request.params as { id: string }
+    const plan = await LessonPlanService.getById(app.db, id)
+    if (!plan) return reply.status(404).send({ error: { message: 'Lesson plan not found', statusCode: 404 } })
+    return reply.send(plan)
+  })
+
+  app.patch('/lesson-plans/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.edit')] }, async (request, reply) => {
+    const { id } = request.params as { id: string }
+    const parsed = LessonPlanUpdateSchema.safeParse(request.body)
+    if (!parsed.success) {
+      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
+    }
+    const plan = await LessonPlanService.update(app.db, id, parsed.data)
+    if (!plan) return reply.status(404).send({ error: { message: 'Lesson plan not found', statusCode: 404 } })
+    return reply.send(plan)
+  })
+
+  // --- Lesson Plan Items ---
+
+  app.patch('/lesson-plan-items/:id', { preHandler: [app.authenticate, app.requirePermission('lessons.edit')] }, async (request, reply) => {
+    const { id } = request.params as { id: string }
+    const parsed = LessonPlanItemUpdateSchema.safeParse(request.body)
+    if (!parsed.success) {
+      return reply.status(400).send({ error: { message: 'Validation failed', details: parsed.error.flatten(), statusCode: 400 } })
+    }
+    const item = await LessonPlanItemService.update(app.db, id, parsed.data)
+    if (!item) return reply.status(404).send({ error: { message: 'Lesson plan item not found', statusCode: 404 } })
+    return reply.send(item)
+  })
 }