feat: add classification-based filtering and fix company name display

- Added classification column to companies table
- Created excluded_classifications setting (default: Tools Only)
- Updated kiosk stats and activity APIs to filter by classification
- Added comprehensive classification filtering UI with checkboxes
- Support for common classifications (Tools Only, Wulff Consulting Client, Customer)
- Allow custom classification entry
- Fixed company name display in settings (convert string IDs properly)
- Classification filtering works alongside company ID exclusions

app/api/kiosk/stats/route.ts

@@ -14,15 +14,40 @@ async function getExcludedCompanyIds(): Promise<number[]> {
   }
 }
 
+async function getExcludedClassifications(): Promise<string[]> {
+  try {
+    const result = await postgresClient.query(
+      `SELECT setting_value FROM kiosk_settings WHERE setting_key = 'excluded_classifications'`
+    );
+    const value = result.rows[0]?.setting_value || '';
+    return value ? value.split(',').map((c: string) => c.trim()).filter(Boolean) : [];
+  } catch (error) {
+    console.error('Error fetching excluded classifications:', error);
+    return [];
+  }
+}
+
 export async function GET(request: NextRequest) {
   try {
     // Get excluded company IDs (co-managed clients)
     const excludedCompanyIds = await getExcludedCompanyIds();
-    const excludeCompanyFilter = excludedCompanyIds.length > 0 
-      ? `AND company_id NOT IN (${excludedCompanyIds.join(',')})` 
-      : '';
+    const excludedClassifications = await getExcludedClassifications();
+    
+    // Build company exclusion filter
+    let excludeCompanyFilter = '';
+    if (excludedCompanyIds.length > 0 || excludedClassifications.length > 0) {
+      const conditions = [];
+      if (excludedCompanyIds.length > 0) {
+        conditions.push(`company_id NOT IN (${excludedCompanyIds.join(',')})`);
+      }
+      if (excludedClassifications.length > 0) {
+        const classificationList = excludedClassifications.map(c => `'${c.replace(/'/g, "''")}'`).join(',');
+        conditions.push(`company_id NOT IN (SELECT id FROM companies WHERE classification IN (${classificationList}))`);
+      }
+      excludeCompanyFilter = `AND (${conditions.join(' AND ')})`;
+    }
 
-    // Critical tickets (Priority 1-3) - exclude RMM alerts (source = 8) and co-managed clients
+    // Critical tickets (Priority 1-3) - exclude RMM alerts (source = 8), co-managed clients, and excluded classifications
     const criticalTicketsResult = await postgresClient.query(
       `SELECT COUNT(*) as count 
        FROM tickets