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/migrate-search-enabled.ts

@@ -0,0 +1,90 @@
+/**
+ * Migration script: Add search_enabled column to schemas table
+ * 
+ * This script adds the search_enabled column to the schemas table if it doesn't exist.
+ * 
+ * Usage:
+ *   npm run migrate:search-enabled
+ *   or
+ *   tsx scripts/migrate-search-enabled.ts
+ */
+
+import { getDatabaseAdapter } from '../src/services/database/singleton.js';
+import { logger } from '../src/services/logger.js';
+
+async function main() {
+  try {
+    console.log('Starting migration: Adding search_enabled column to schemas table...');
+    
+    const db = getDatabaseAdapter();
+    await db.ensureInitialized?.();
+    
+    const isPostgres = db.isPostgres === true;
+    
+    // Check if column exists and add it if it doesn't
+    if (isPostgres) {
+      // PostgreSQL: Check if column exists
+      const columnExists = await db.queryOne<{ exists: boolean }>(`
+        SELECT EXISTS (
+          SELECT 1 FROM information_schema.columns 
+          WHERE table_name = 'schemas' AND column_name = 'search_enabled'
+        ) as exists
+      `);
+      
+      if (!columnExists?.exists) {
+        console.log('Adding search_enabled column to schemas table...');
+        await db.execute(`
+          ALTER TABLE schemas ADD COLUMN search_enabled BOOLEAN NOT NULL DEFAULT TRUE;
+        `);
+        console.log('✓ Column added successfully');
+      } else {
+        console.log('✓ Column already exists');
+      }
+      
+      // Create index if it doesn't exist
+      try {
+        await db.execute(`
+          CREATE INDEX IF NOT EXISTS idx_schemas_search_enabled ON schemas(search_enabled);
+        `);
+        console.log('✓ Index created/verified');
+      } catch (error) {
+        console.log('Index may already exist, continuing...');
+      }
+    } else {
+      // SQLite: Try to query the column to see if it exists
+      try {
+        await db.queryOne('SELECT search_enabled FROM schemas LIMIT 1');
+        console.log('✓ Column already exists');
+      } catch {
+        // Column doesn't exist, add it
+        console.log('Adding search_enabled column to schemas table...');
+        await db.execute('ALTER TABLE schemas ADD COLUMN search_enabled INTEGER NOT NULL DEFAULT 1');
+        console.log('✓ Column added successfully');
+      }
+      
+      // Create index if it doesn't exist
+      try {
+        await db.execute('CREATE INDEX IF NOT EXISTS idx_schemas_search_enabled ON schemas(search_enabled)');
+        console.log('✓ Index created/verified');
+      } catch (error) {
+        console.log('Index may already exist, continuing...');
+      }
+    }
+    
+    // Verify the column exists
+    try {
+      await db.queryOne('SELECT search_enabled FROM schemas LIMIT 1');
+      console.log('✓ Migration completed successfully - search_enabled column verified');
+    } catch (error) {
+      console.error('✗ Migration verification failed:', error);
+      process.exit(1);
+    }
+    
+    process.exit(0);
+  } catch (error) {
+    console.error('✗ Migration failed:', error);
+    process.exit(1);
+  }
+}
+
+main();