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

backend/scripts/discover-schema.ts

@@ -0,0 +1,38 @@
+#!/usr/bin/env npx tsx
+
+/**
+ * Schema Discovery CLI
+ * 
+ * Manually trigger schema discovery from Jira Assets API.
+ * This script fetches the schema and stores it in the database.
+ * 
+ * Usage: npm run discover-schema
+ */
+
+import { schemaDiscoveryService } from '../src/services/schemaDiscoveryService.js';
+import { schemaCacheService } from '../src/services/schemaCacheService.js';
+import { logger } from '../src/services/logger.js';
+
+async function main() {
+  try {
+    console.log('Starting schema discovery...');
+    logger.info('Schema Discovery CLI: Starting manual schema discovery');
+    
+    // Force discovery (ignore cache)
+    await schemaDiscoveryService.discoverAndStoreSchema(true);
+    
+    // Invalidate cache so next request gets fresh data
+    schemaCacheService.invalidate();
+    
+    console.log('✅ Schema discovery completed successfully!');
+    logger.info('Schema Discovery CLI: Schema discovery completed successfully');
+    
+    process.exit(0);
+  } catch (error) {
+    console.error('❌ Schema discovery failed:', error);
+    logger.error('Schema Discovery CLI: Schema discovery failed', error);
+    process.exit(1);
+  }
+}
+
+main();