UI styling improvements: dashboard headers and navigation

- Restore blue PageHeader on Dashboard (/app-components)
- Update homepage (/) with subtle header design without blue bar
- Add uniform PageHeader styling to application edit page
- Fix Rapporten link on homepage to point to /reports overview
- Improve header descriptions spacing for better readability

docker-compose.dev.yml

@@ -0,0 +1,21 @@
+services:
+  postgres:
+    image: postgres:15-alpine
+    container_name: cmdb-postgres-dev
+    environment:
+      POSTGRES_DB: cmdb_cache
+      POSTGRES_USER: cmdb
+      POSTGRES_PASSWORD: cmdb-dev
+    ports:
+      - "5432:5432"
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U cmdb"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+    restart: unless-stopped
+
+volumes:
+  postgres_data: