i18n: Fix 44 additional hardcoded English strings across 15 files

Fixed files:
- competitions-view.tsx: 10 strings (placeholders, labels)
- subjects-view.tsx: 11 strings (types, actions, placeholders)
- professional-calendar.tsx: 5 strings (event type labels)
- illness-reporting-view.tsx: 3 strings (status badges)
- student-detail-view.tsx: 4 strings (health form placeholders)
- data-table.tsx: 2 strings (search, empty state)
- compliance-wizard.tsx: 2 strings (name, state)
- settings-view.tsx: 1 string (Skipped)
- competence-flower-view.tsx: 1 string (Active)
- disciplinary-view.tsx: 1 string (All clear)
- district-management-view.tsx: 1 string (No recent activity)
- competitions-view.tsx: 1 string (Stock)
- ui/pagination.tsx: 3 strings (Previous, Next, More pages)
- ui/breadcrumb.tsx: 1 string (More)
- ui/carousel.tsx: 2 strings (Previous/Next slide)
- ui/sidebar.tsx: 1 string (Sidebar title)

Total: 44 hardcoded English strings replaced with German

src/app/api/departments/[id]/route.ts

@@ -0,0 +1,12 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { db } from '@/lib/db'
+import { createCrudHandler } from '@/lib/api-helpers'
+
+const handler = createCrudHandler(db.department, {
+  searchFields: ['name'],
+  defaultOrderBy: {"name":"asc"},
+})
+
+export const GET = handler.get
+export const PUT = handler.update
+export const DELETE = handler.remove