fix: resolve all 65 pre-existing frontend test failures (318/318 passing)

- Remove duplicate vi.mock(@/api/hooks) in SettingsRoles.test.tsx that overrode forceUpdate logic
- SettingsRoles mock: use vi.hoisted for shared forceUpdateRef between useRoles and useUpdateRole
- SettingsRoles mock: use plain async functions instead of vi.fn().mockImplementation for mutations

frontend/src/components/ai/SuggestionBadge.tsx

@@ -30,7 +30,7 @@ export function SuggestionBadge({ onClick }: SuggestionBadgeProps) {
     return (
       <button
         onClick={onClick}
-        className="relative p-2 text-gray-500 hover:text-gray-700 transition-colors"
+        className="relative p-2 text-gray-500 hover:text-gray-700 transition-colors min-h-touch min-w-touch"
         title="KI Vorschläge"
       >
         🤖
@@ -41,7 +41,7 @@ export function SuggestionBadge({ onClick }: SuggestionBadgeProps) {
   return (
     <button
       onClick={onClick}
-      className={`relative p-2 text-gray-500 hover:text-gray-700 transition-colors ${
+      className={`relative p-2 text-gray-500 hover:text-gray-700 transition-colors min-h-touch min-w-touch ${
         pulsing ? 'animate-pulse' : ''
       }`}
       title={`${count} KI Vorschläge`}