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.yml

@@ -1,5 +1,3 @@
-version: '3.8'
-
 services:
   postgres:
     image: postgres:15-alpine
@@ -33,6 +31,7 @@ services:
       - DATABASE_NAME=cmdb
       - DATABASE_USER=cmdb
       - DATABASE_PASSWORD=cmdb-dev
+      # Optional Jira/AI variables (set in .env file or environment)
       - JIRA_HOST=${JIRA_HOST}
       - JIRA_PAT=${JIRA_PAT}
       - JIRA_SCHEMA_ID=${JIRA_SCHEMA_ID}