Initial commit: ExaMetra v1.0.0 — Free & open-source competence & grading platform

Features:
- 15+ views: Dashboard, Classes, Progress, Flower, Matrix, Assessments, Grading, Reports, Attendance, Calendar, Lesson Plans, Analytics, Parent Communication, Behavior Tracking, Settings
- 34+ API endpoints
- 30+ Prisma models
- 700+ i18n keys (German + English)
- Keyboard shortcuts (Cmd+K, Cmd+1-9, Cmd+/)
- Batch deletion, drag-and-drop seating, custom color palette
- Demo accounts (admin, teacher, student, parent)
- Dark mode, responsive design, print styles
- CSV/PDF export, notification system, onboarding tour
- Zero emojis — all replaced with Lucide icons
- MIT License

src/app/api/classes/[id]/students/route.ts

@@ -0,0 +1,127 @@
+import { NextResponse } from 'next/server';
+import { z } from 'zod';
+import { db } from '@/lib/db';
+import { getSession } from '@/lib/auth';
+
+export async function GET(
+  _request: Request,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  try {
+    const session = await getSession();
+    if (!session) {
+      return NextResponse.json({ error: 'Not authenticated' }, { status: 401 });
+    }
+
+    const { id: classGroupId } = await params;
+
+    const enrollments = await db.enrollment.findMany({
+      where: {
+        classGroupId,
+        endDate: null,
+        student: { deletedAt: null },
+      },
+      include: {
+        student: true,
+        schoolYear: { select: { id: true, label: true } },
+      },
+      orderBy: { student: { lastName: 'asc' } },
+    });
+
+    const students = enrollments.map((e) => ({
+      ...e.student,
+      enrollmentId: e.id,
+      schoolYearId: e.schoolYearId,
+      schoolYear: e.schoolYear,
+      startDate: e.startDate,
+    }));
+
+    return NextResponse.json(students);
+  } catch (error) {
+    console.error('Class students GET error:', error);
+    return NextResponse.json(
+      { error: 'Internal server error' },
+      { status: 500 }
+    );
+  }
+}
+
+export async function POST(
+  request: Request,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  try {
+    const session = await getSession();
+    if (!session) {
+      return NextResponse.json({ error: 'Not authenticated' }, { status: 401 });
+    }
+
+    if (
+      session.user?.role !== 'SUPER_ADMIN' &&
+      session.user?.role !== 'SCHOOL_ADMIN' &&
+      session.user?.role !== 'TEACHER'
+    ) {
+      return NextResponse.json({ error: 'Forbidden' }, { status: 403 });
+    }
+
+    const { id: classGroupId } = await params;
+
+    const body = await request.json();
+    const schema = z.object({
+      studentId: z.string().min(1),
+      schoolYearId: z.string().min(1),
+      startDate: z
+        .string()
+        .optional()
+        .transform((v) => (v ? new Date(v) : new Date())),
+    });
+
+    const parsed = schema.safeParse(body);
+    if (!parsed.success) {
+      return NextResponse.json(
+        { error: 'Validation failed', details: parsed.error.issues },
+        { status: 400 }
+      );
+    }
+
+    const { studentId, schoolYearId, startDate } = parsed.data;
+
+    // Check if already enrolled
+    const existing = await db.enrollment.findFirst({
+      where: {
+        studentId,
+        classGroupId,
+        endDate: null,
+      },
+    });
+
+    if (existing) {
+      return NextResponse.json(
+        { error: 'Student already enrolled in this class' },
+        { status: 409 }
+      );
+    }
+
+    const enrollment = await db.enrollment.create({
+      data: {
+        studentId,
+        classGroupId,
+        schoolYearId,
+        startDate,
+      },
+      include: {
+        student: true,
+        classGroup: true,
+        schoolYear: { select: { id: true, label: true } },
+      },
+    });
+
+    return NextResponse.json(enrollment, { status: 201 });
+  } catch (error) {
+    console.error('Class students POST error:', error);
+    return NextResponse.json(
+      { error: 'Internal server error' },
+      { status: 500 }
+    );
+  }
+}