feat: 优化图片加载和展示功能

- 新增 SmartImage 组件优化图片加载体验
- 新增 ImageGrid 组件支持多图布局展示
- 新增 imageHelper 工具函数
- 优化 PostCard 帖子卡片图片展示
- 优化消息页面 SegmentRenderer
- 优化日程页面 ScheduleScreen
- 优化上传服务 uploadService

src/screens/message/components/ChatScreen/SegmentRenderer.tsx

@@ -438,11 +438,20 @@ const renderLinkSegment = (
 ): React.ReactNode => {
   const { onLinkPress, isMe } = props;
   
-  const handlePress = () => {
+  const handlePress = async () => {
     if (onLinkPress) {
       onLinkPress(data.url);
     } else {
-      Linking.openURL(data.url).catch(() => {});
+      try {
+        const supported = await Linking.canOpenURL(data.url);
+        if (supported) {
+          await Linking.openURL(data.url);
+        } else {
+          console.warn('无法打开链接:', data.url);
+        }
+      } catch (error) {
+        console.warn('打开链接失败:', error);
+      }
     }
   };
   
@@ -466,7 +475,13 @@ const renderLinkSegment = (
           </Text>
         )}
         <Text style={styles.linkUrl} numberOfLines={1}>
-          {new URL(data.url).hostname}
+          {(() => {
+            try {
+              return new URL(data.url).hostname;
+            } catch {
+              return data.url;
+            }
+          })()}
         </Text>
       </View>
     </TouchableOpacity>