✨ Post recommendation widget

ios/Runner/Service/Attachment.swift

@@ -0,0 +1,14 @@
+//
+//  Attachment.swift
+//  Runner
+//
+//  Created by LittleSheep on 2024/12/14.
+//
+
+import Foundation
+
+func getAttachmentUrl(for identifier: String) -> String {
+    let serverBaseUrl = "https://api.sn.solsynth.dev"
+    
+    return identifier.starts(with: "http") ? identifier : "\(serverBaseUrl)/cgi/uc/attachments/\(identifier)"
+}