Fix missing Japanese/Korean translations and BGTask string interpolation bug

Add "THE" translations for ja/ko in the subscription magazine header, and fix
broken string interpolation in BGTask error logging.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Reflect/Localizable.xcstrings

@@ -17696,13 +17696,13 @@
         "ja" : {
           "stringUnit" : {
             "state" : "translated",
-            "value" : ""
+            "value" : "THE"
           }
         },
         "ko" : {
           "stringUnit" : {
             "state" : "translated",
-            "value" : ""
+            "value" : "THE"
           }
         },
         "pt-BR" : {

Shared/BGTask.swift

@@ -39,7 +39,7 @@ class BGTask {
         do {
             try BGTaskScheduler.shared.submit(request)
         } catch {
-            print("Could not schedule image fetch: (error)")
+            print("Could not schedule image fetch: \(error)")
         }
     }
 }