feat: add company sidebar filters, internal phone, mail icon fix, and update script

backend/db.js

@@ -78,11 +78,20 @@ async function initializeTables() {
         email TEXT,
         building TEXT,
         floor TEXT,
+        internal_phone TEXT,
         FOREIGN KEY (department_id) REFERENCES departments(id) ON DELETE SET NULL,
         FOREIGN KEY (company_id) REFERENCES companies(id) ON DELETE SET NULL
       )
     `);
 
+    // Dynamic schema migration: add internal_phone column if it does not exist
+    const columns = await all('PRAGMA table_info(employees)');
+    const hasInternalPhone = columns.some((col) => col.name === 'internal_phone');
+    if (!hasInternalPhone) {
+      console.log('Migrating database: adding internal_phone column to employees table...');
+      await run('ALTER TABLE employees ADD COLUMN internal_phone TEXT');
+    }
+
     // Seed data if database is fresh
     const deptCount = await get('SELECT COUNT(*) as count FROM departments');
     if (deptCount.count === 0) {