Refactor to eliminate hardcoded identifiers

Read package identifier and app group ID from Info.plist at runtime
via AppConfiguration. This enables SFM.System to use TeamID-prefixed
app group format required by macOS Sequoia, fixing the privacy prompt
when accessing app group data.

ApplicationLibrary/Service/UIProfileUpdateTask.swift

@@ -7,7 +7,7 @@ import Library
 
 #if os(iOS) || os(tvOS)
     public class UIProfileUpdateTask: BGAppRefreshTask {
-        private static let taskSchedulerPermittedIdentifier = "\(FilePath.packageName).update_profiles"
+        private static let taskSchedulerPermittedIdentifier = AppConfiguration.backgroundTaskID
 
         private static var registered = false
         public static func configure() throws {

ApplicationLibrary/Views/Setting/CoreView.swift

@@ -135,7 +135,7 @@ public struct CoreView: View {
         private nonisolated func openInFilesApp() async {
             do {
                 let domains = try await NSFileProviderManager.domains()
-                guard let domain = domains.first(where: { $0.identifier.rawValue == "io.nekohasekai.sfavt.workingdir" }) else {
+                guard let domain = domains.first(where: { $0.identifier.rawValue == AppConfiguration.fileProviderDomainID }) else {
                     throw NSError(domain: "CoreView", code: 0, userInfo: [NSLocalizedDescriptionKey: "File provider domain not found"])
                 }
                 guard let manager = NSFileProviderManager(for: domain) else {