fix: 修复首页位置上报图标渲染

suixinkan/Features/Home/Services/HomeMenuIconFactory.swift

@@ -16,21 +16,24 @@ enum HomeMenuIconFactory {
 
     private static let imageCache = NSCache<NSString, UIImage>()
 
-    /// 优先加载 Assets 资源图；否则加载 SF Symbol，并统一渲染到固定画布。
+    /// 优先加载 Assets 资源图并归一化画布；SF Symbol 保留系统符号表示与分层渲染。
     static func image(named iconName: String) -> UIImage? {
         let cacheKey = iconName as NSString
         if let cachedImage = imageCache.object(forKey: cacheKey) {
             return cachedImage
         }
 
-        guard let sourceImage = UIImage(named: iconName)
-            ?? UIImage(systemName: iconName, withConfiguration: symbolConfiguration) else {
-            return nil
+        let image: UIImage?
+        if let assetImage = UIImage(named: iconName) {
+            image = renderOnFixedCanvas(assetImage)
+        } else {
+            image = UIImage(systemName: iconName, withConfiguration: symbolConfiguration)
         }
 
-        let normalizedImage = renderOnFixedCanvas(sourceImage)
-        imageCache.setObject(normalizedImage, forKey: cacheKey)
-        return normalizedImage
+        if let image {
+            imageCache.setObject(image, forKey: cacheKey)
+        }
+        return image
     }
 
     private static func renderOnFixedCanvas(_ image: UIImage) -> UIImage {