修改首页智能体头像显示逻辑，先显示默认头像（所有情况都显示）如果有网络头像则覆盖显示。

app/src/main/java/com/aiosman/ravenow/ui/index/tabs/ai/Agent.kt

@@ -425,6 +425,13 @@ fun AgentCardSquare(agentItem: AgentItem, viewModel: AgentViewModel, navControll
                 .clip(RoundedCornerShape(avatarSize / 2)),
             contentAlignment = Alignment.Center
         ) {
+            Image(
+                painter = painterResource(R.mipmap.group_copy),
+                contentDescription = "默认头像",
+                modifier = Modifier.size(avatarSize),
+                contentScale = androidx.compose.ui.layout.ContentScale.Crop
+            )
+
             if (agentItem.avatar.isNotEmpty()) {
                 CustomAsyncImage(
                     imageUrl = agentItem.avatar,
@@ -434,13 +441,6 @@ fun AgentCardSquare(agentItem: AgentItem, viewModel: AgentViewModel, navControll
                         .clip(RoundedCornerShape(avatarSize / 2)),
                     contentScale = androidx.compose.ui.layout.ContentScale.Crop
                 )
-            } else {
-                Image(
-                    painter = painterResource(R.mipmap.rider_pro_agent),
-                    contentDescription = "默认头像",
-                    modifier = Modifier.size(avatarSize / 2),
-                    colorFilter = ColorFilter.tint(AppColors.secondaryText)
-                )
             }
         }
 
@@ -531,7 +531,7 @@ fun AgentViewPagerSection(agentItems: List<AgentItem>,viewModel: AgentViewModel)
             // Agent内容
             Box(
                 modifier = Modifier
-                    .height(300.dp)
+                    .height(310.dp)
             ) {
                 HorizontalPager(
                     state = pagerState,
@@ -553,7 +553,7 @@ fun AgentViewPagerSection(agentItems: List<AgentItem>,viewModel: AgentViewModel)
                         agentItems = agentItems.drop(page * itemsPerPage).take(itemsPerPage),
                         page = page,
                         modifier = Modifier
-                            .height(300.dp)
+                            .height(310.dp)
                             .graphicsLayer {
                                 scaleX = scale
                                 scaleY = scale
@@ -624,7 +624,7 @@ fun AgentCard2(viewModel: AgentViewModel,agentItem: AgentItem,navController: Nav
         Box(
             modifier = Modifier
                 .size(48.dp)
-                .background(Color(0xFFF5F5F5), RoundedCornerShape(24.dp))
+                .background(Color(0x00F5F5F5), RoundedCornerShape(24.dp))
                 .clickable {
                     if (DebounceUtils.simpleDebounceClick(lastClickTime, 500L) {
                             viewModel.goToProfile(agentItem.openId, navController)
@@ -634,6 +634,12 @@ fun AgentCard2(viewModel: AgentViewModel,agentItem: AgentItem,navController: Nav
                 },
             contentAlignment = Alignment.Center
         ) {
+            Image(
+                painter = painterResource(R.mipmap.group_copy),
+                contentDescription = "默认头像",
+                modifier = Modifier.size(48.dp),
+            )
+
             if (agentItem.avatar.isNotEmpty()) {
                 CustomAsyncImage(
                     imageUrl = agentItem.avatar,
@@ -643,13 +649,6 @@ fun AgentCard2(viewModel: AgentViewModel,agentItem: AgentItem,navController: Nav
                         .clip(RoundedCornerShape(24.dp)),
                     contentScale = androidx.compose.ui.layout.ContentScale.Crop
                 )
-            } else {
-                Image(
-                    painter = painterResource(R.mipmap.rider_pro_agent),
-                    contentDescription = "默认头像",
-                    modifier = Modifier.size(24.dp),
-                    colorFilter = ColorFilter.tint(AppColors.secondaryText)
-                )
             }
         }