feat: add missing platform bridge functions for batch duplicate check and cross-platform IDs

ios/Runner/AppDelegate.swift

@@ -142,6 +142,27 @@ import Gobackend  // Import Go framework
             if let error = error { throw error }
             return response
             
+        case "checkDuplicatesBatch":
+            let args = call.arguments as! [String: Any]
+            let outputDir = args["output_dir"] as! String
+            let tracksJson = args["tracks"] as? String ?? "[]"
+            let response = GobackendCheckDuplicatesBatch(outputDir, tracksJson, &error)
+            if let error = error { throw error }
+            return response
+            
+        case "preBuildDuplicateIndex":
+            let args = call.arguments as! [String: Any]
+            let outputDir = args["output_dir"] as! String
+            GobackendPreBuildDuplicateIndex(outputDir, &error)
+            if let error = error { throw error }
+            return nil
+            
+        case "invalidateDuplicateIndex":
+            let args = call.arguments as! [String: Any]
+            let outputDir = args["output_dir"] as! String
+            GobackendInvalidateDuplicateIndex(outputDir)
+            return nil
+            
         case "buildFilename":
             let args = call.arguments as! [String: Any]
             let template = args["template"] as! String
@@ -249,6 +270,43 @@ import Gobackend  // Import Go framework
             if let error = error { throw error }
             return response
             
+        case "checkAvailabilityFromDeezerID":
+            let args = call.arguments as! [String: Any]
+            let deezerTrackId = args["deezer_track_id"] as! String
+            let response = GobackendCheckAvailabilityFromDeezerID(deezerTrackId, &error)
+            if let error = error { throw error }
+            return response
+            
+        case "checkAvailabilityByPlatformID":
+            let args = call.arguments as! [String: Any]
+            let platform = args["platform"] as! String
+            let entityType = args["entity_type"] as! String
+            let entityId = args["entity_id"] as! String
+            let response = GobackendCheckAvailabilityByPlatformID(platform, entityType, entityId, &error)
+            if let error = error { throw error }
+            return response
+            
+        case "getSpotifyIDFromDeezerTrack":
+            let args = call.arguments as! [String: Any]
+            let deezerTrackId = args["deezer_track_id"] as! String
+            let response = GobackendGetSpotifyIDFromDeezerTrack(deezerTrackId, &error)
+            if let error = error { throw error }
+            return response
+            
+        case "getTidalURLFromDeezerTrack":
+            let args = call.arguments as! [String: Any]
+            let deezerTrackId = args["deezer_track_id"] as! String
+            let response = GobackendGetTidalURLFromDeezerTrack(deezerTrackId, &error)
+            if let error = error { throw error }
+            return response
+            
+        case "getAmazonURLFromDeezerTrack":
+            let args = call.arguments as! [String: Any]
+            let deezerTrackId = args["deezer_track_id"] as! String
+            let response = GobackendGetAmazonURLFromDeezerTrack(deezerTrackId, &error)
+            if let error = error { throw error }
+            return response
+            
         case "preWarmTrackCache":
             let args = call.arguments as! [String: Any]
             let tracksJson = args["tracks"] as! String
@@ -404,6 +462,14 @@ import Gobackend  // Import Go framework
             if let error = error { throw error }
             return response
             
+        case "enrichTrackWithExtension":
+            let args = call.arguments as! [String: Any]
+            let extensionId = args["extension_id"] as! String
+            let trackJson = args["track"] as? String ?? "{}"
+            let response = GobackendEnrichTrackWithExtensionJSON(extensionId, trackJson, &error)
+            if let error = error { throw error }
+            return response
+            
         case "removeExtension":
             let args = call.arguments as! [String: Any]
             let extensionId = args["extension_id"] as! String