feat: Add comprehensive test data generator and enhance user management with initials

src/lib/userManagement.js

@@ -11,11 +11,15 @@ export async function createUser({ name, username, password, role = 'user', is_a
 
   const passwordHash = await bcrypt.hash(password, 12)
   const userId = randomBytes(16).toString('hex')
+  
+  // Generate initials from name (e.g., "John Doe" -> "JD")
+  const nameParts = name.trim().split(/\s+/)
+  const initial = nameParts.map(part => part.charAt(0).toUpperCase()).join('')
 
   const result = db.prepare(`
-    INSERT INTO users (id, name, username, password_hash, role, is_active, can_be_assigned)
-    VALUES (?, ?, ?, ?, ?, ?, ?)
-  `).run(userId, name, username, passwordHash, role, is_active ? 1 : 0, can_be_assigned ? 1 : 0)
+    INSERT INTO users (id, name, username, password_hash, role, initial, is_active, can_be_assigned)
+    VALUES (?, ?, ?, ?, ?, ?, ?, ?)
+  `).run(userId, name, username, passwordHash, role, initial, is_active ? 1 : 0, can_be_assigned ? 1 : 0)
 
   return db.prepare(`
     SELECT id, name, username, role, created_at, updated_at, last_login,