fix: resolve compilation errors after refactoring

- Update MainActivity to use hiltViewModel instead of viewModel
- Remove reference to deleted SafetyLevel.WARNING in AppListScreen
- Remove canRollback logic from SettingsScreen action history

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: risunCode

app/src/main/java/com/appcontrolx/ui/MainActivity.kt

@@ -9,7 +9,7 @@ import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
 import androidx.compose.ui.Modifier
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
-import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.hilt.navigation.compose.hiltViewModel
 import com.appcontrolx.ui.navigation.AppNavGraph
 import com.appcontrolx.ui.theme.AppControlXTheme
 import com.appcontrolx.ui.MainViewModel
@@ -21,7 +21,7 @@ class MainActivity : ComponentActivity() {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
         setContent {
-            val viewModel: MainViewModel = viewModel()
+            val viewModel: MainViewModel = hiltViewModel()
             val themeMode = viewModel.themeMode.collectAsStateWithLifecycle()
 
             AppControlXTheme(

app/src/main/java/com/appcontrolx/ui/screens/apps/AppListScreen.kt

@@ -708,7 +708,7 @@ private fun AppDetailSheet(
             Spacer(modifier = Modifier.height(12.dp))
 
             val canExecute = app.safetyLevel != SafetyLevel.CRITICAL
-            val canFreeze = app.safetyLevel == SafetyLevel.SAFE || app.safetyLevel == SafetyLevel.WARNING
+            val canFreeze = app.safetyLevel == SafetyLevel.SAFE
 
             Row(
                 modifier = Modifier.fillMaxWidth(),

app/src/main/java/com/appcontrolx/ui/screens/settings/SettingsScreen.kt

@@ -779,12 +779,6 @@ private fun ActionHistoryItem(
                     color = MaterialTheme.colorScheme.onSurfaceVariant
                 )
             }
-
-            if (item.canRollback) {
-                TextButton(onClick = onRollback) {
-                    Text("Undo")
-                }
-            }
         }
     }
 }