Fix: Batch operation lag - optimize getAppName with HashMap cache, async snapshot save

Author: risunCode

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

@@ -345,12 +345,12 @@ class AppListFragment : Fragment() {
         val pm = policyManager ?: return
         val rm = rollbackManager
 
-        // Get app names for display
+        // Quick app names - use package short name if not cached
         val appNames = packages.map { pkg -> 
             adapter.getAppName(pkg) ?: pkg.substringAfterLast(".")
         }
 
-        // Show new BottomSheet with countdown
+        // Show BottomSheet IMMEDIATELY
         val bottomSheet = BatchProgressBottomSheet.newInstance(
             actionName = action.name,
             appNames = appNames,
@@ -375,10 +375,12 @@ class AppListFragment : Fragment() {
                 loadApps(forceRefresh = true)
             }
         )
+        
+        // Show immediately without waiting
         bottomSheet.show(childFragmentManager, BatchProgressBottomSheet.TAG)
 
-        // Save snapshot before action
-        lifecycleScope.launch {
+        // Save snapshot in background (non-blocking)
+        lifecycleScope.launch(Dispatchers.IO) {
             rm?.saveSnapshot(packages)
         }
     }

app/src/main/java/com/appcontrolx/ui/adapter/AppListAdapter.kt

@@ -50,8 +50,18 @@ class AppListAdapter(
 
     fun isAllSelected(): Boolean = selectedPackages.size == currentList.size && currentList.isNotEmpty()
 
+    // Cache for O(1) lookup
+    private val appNameCache = mutableMapOf<String, String>()
+    
+    override fun submitList(list: List<AppInfo>?) {
+        // Build cache when list is submitted
+        appNameCache.clear()
+        list?.forEach { appNameCache[it.packageName] = it.appName }
+        super.submitList(list)
+    }
+    
     fun getAppName(packageName: String): String? {
-        return currentList.find { it.packageName == packageName }?.appName
+        return appNameCache[packageName]
     }
 
     private fun toggleSelection(packageName: String) {