处理下标越界和防抖

app/src/main/java/com/aiosman/ravenow/ui/post/NewPost.kt

@@ -315,6 +315,9 @@ fun NewPostTopBar(onSendClick: () -> Unit = {}) {
     val AppColors = LocalAppTheme.current
 
     var uploading by remember { mutableStateOf(false) }
+    var lastBackClickTime by remember { mutableStateOf(0L) }
+    var lastSendClickTime by remember { mutableStateOf(0L) }
+    val debounceTime = 500L // 500毫秒防抖时间
     // 上传进度
     if (uploading) {
         BasicAlertDialog(
@@ -353,7 +356,12 @@ fun NewPostTopBar(onSendClick: () -> Unit = {}) {
                 modifier = Modifier
                     .size(24.dp)
                     .noRippleClickable {
-                        navController.popBackStack()
+                        // 添加防抖逻辑
+                        val currentTime = System.currentTimeMillis()
+                        if (currentTime - lastSendClickTime > debounceTime) {
+                            lastSendClickTime = currentTime
+                            navController.popBackStack()
+                        }
                     },
                 colorFilter = ColorFilter.tint(AppColors.text)
             )

app/src/main/java/com/aiosman/ravenow/ui/post/NewPostViewModel.kt

@@ -193,8 +193,10 @@ object NewPostViewModel : ViewModel() {
     }
 
     fun deleteImage(index: Int) {
-        imageList = imageList.toMutableList().apply {
+        if (index >= 0 && index < imageList.size) {
-            removeAt(index)
+            imageList = imageList.toMutableList().apply {
+                removeAt(index)
+            }
         }
     }
 }