Initial commit: Kalendartool (Next.js, Prisma, Docker)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

app/api/me/route.ts

@@ -0,0 +1,37 @@
+/**
+ * GET /api/me - aktueller Benutzer + sein Kalender (fuer Dashboard).
+ */
+import { NextResponse } from 'next/server';
+import { prisma } from '@/lib/db/client';
+import { requireDbUser } from '@/lib/api/context';
+import { errorResponse } from '@/lib/api/responses';
+
+export async function GET(): Promise<NextResponse> {
+  try {
+    const user = await requireDbUser();
+
+    const membership = await prisma.calendarMember.findUnique({
+      where: { userId: user.id },
+      select: {
+        calendar: { select: { id: true, title: true, description: true, isActive: true } },
+      },
+    });
+
+    const ownedCalendars =
+      user.role === 'ADMIN'
+        ? await prisma.calendar.findMany({
+            where: { ownerId: user.id },
+            orderBy: { createdAt: 'desc' },
+            select: { id: true, title: true, description: true, isActive: true },
+          })
+        : [];
+
+    return NextResponse.json({
+      user: { id: user.id, email: user.email, username: user.username, role: user.role },
+      memberCalendar: membership?.calendar ?? null,
+      ownedCalendars,
+    });
+  } catch (error) {
+    return errorResponse(error);
+  }
+}