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.

Library/Database/Profile+Transferable.swift

@@ -115,7 +115,7 @@ public struct TypedProfile: Transferable, Codable {
 }
 
 public extension UTType {
-    static var profile: UTType { .init(exportedAs: "io.nekohasekai.sfavt.profile") }
+    static var profile: UTType { .init(exportedAs: AppConfiguration.profileUTType) }
 }
 
 #if !os(tvOS)

Library/Network/ExtensionProfile.swift

@@ -4,7 +4,7 @@ import NetworkExtension
 
 @MainActor
 public class ExtensionProfile: ObservableObject {
-    public static let controlKind = "io.nekohasekai.sfavt.widget.ServiceToggle"
+    public static let controlKind = AppConfiguration.widgetControlKind
 
     private let manager: NEVPNManager
     private var connection: NEVPNConnection
@@ -162,9 +162,9 @@ public class ExtensionProfile: ObservableObject {
         manager.localizedDescription = Variant.applicationName
         let tunnelProtocol = NETunnelProviderProtocol()
         if Variant.useSystemExtension {
-            tunnelProtocol.providerBundleIdentifier = "\(FilePath.packageName).system"
+            tunnelProtocol.providerBundleIdentifier = AppConfiguration.systemExtensionBundleID
         } else {
-            tunnelProtocol.providerBundleIdentifier = "\(FilePath.packageName).extension"
+            tunnelProtocol.providerBundleIdentifier = AppConfiguration.extensionBundleID
         }
         tunnelProtocol.serverAddress = "sing-box"
         manager.protocolConfiguration = tunnelProtocol

Library/Shared/AppConfiguration.swift

@@ -0,0 +1,25 @@
+import Foundation
+
+public enum AppConfiguration {
+    public static let packageName: String = {
+        guard let value = Bundle.main.object(forInfoDictionaryKey: "BasePackageIdentifier") as? String else {
+            fatalError("Missing BasePackageIdentifier in Info.plist")
+        }
+        return value
+    }()
+
+    public static let appGroupID: String = {
+        guard let value = Bundle.main.object(forInfoDictionaryKey: "AppGroupIdentifier") as? String else {
+            fatalError("Missing AppGroupIdentifier in Info.plist")
+        }
+        return value
+    }()
+
+    public static var extensionBundleID: String { "\(packageName).extension" }
+    public static var systemExtensionBundleID: String { "\(packageName).system" }
+    public static var fileProviderDomainID: String { "\(packageName).workingdir" }
+    public static var widgetControlKind: String { "\(packageName).widget.ServiceToggle" }
+    public static var profileUTType: String { "\(packageName).profile" }
+    public static var backgroundTaskID: String { "\(packageName).update_profiles" }
+    public static var iCloudContainerID: String { "iCloud.\(packageName)" }
+}

Library/Shared/FilePath.swift

@@ -1,32 +1,29 @@
 import Foundation
 
 public enum FilePath {
-    public static let packageName = "io.nekohasekai.sfavt"
-}
+    public static let packageName = AppConfiguration.packageName
+    public static let groupName = AppConfiguration.appGroupID
 
-public extension FilePath {
-    static let groupName = "group.\(packageName)"
-
-    private static let defaultSharedDirectory: URL! = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: FilePath.groupName)
+    private static let defaultSharedDirectory: URL! = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: groupName)
 
     #if os(iOS)
-        static let sharedDirectory = defaultSharedDirectory!
+        public static let sharedDirectory = defaultSharedDirectory!
     #elseif os(tvOS)
-        static let sharedDirectory = defaultSharedDirectory
+        public static let sharedDirectory = defaultSharedDirectory
             .appendingPathComponent("Library", isDirectory: true)
             .appendingPathComponent("Caches", isDirectory: true)
     #elseif os(macOS)
-        static var sharedDirectory: URL! = defaultSharedDirectory
+        public static var sharedDirectory: URL! = defaultSharedDirectory
     #endif
 
     #if os(iOS)
-        static let cacheDirectory = sharedDirectory
+        public static let cacheDirectory = sharedDirectory
             .appendingPathComponent("Library", isDirectory: true)
             .appendingPathComponent("Caches", isDirectory: true)
     #elseif os(tvOS)
-        static let cacheDirectory = sharedDirectory
+        public static let cacheDirectory = sharedDirectory
     #elseif os(macOS)
-        static var cacheDirectory: URL {
+        public static var cacheDirectory: URL {
             sharedDirectory
                 .appendingPathComponent("Library", isDirectory: true)
                 .appendingPathComponent("Caches", isDirectory: true)
@@ -34,15 +31,15 @@ public extension FilePath {
     #endif
 
     #if os(macOS)
-        static var workingDirectory: URL {
+        public static var workingDirectory: URL {
             cacheDirectory.appendingPathComponent("Working", isDirectory: true)
         }
     #else
-        static let workingDirectory = cacheDirectory.appendingPathComponent("Working", isDirectory: true)
+        public static let workingDirectory = cacheDirectory.appendingPathComponent("Working", isDirectory: true)
 
     #endif
 
-    static var iCloudDirectory = FileManager.default.url(forUbiquityContainerIdentifier: nil)?.appendingPathComponent("Documents", isDirectory: true) ?? URL(string: "stub")!
+    public static var iCloudDirectory = FileManager.default.url(forUbiquityContainerIdentifier: nil)?.appendingPathComponent("Documents", isDirectory: true) ?? URL(string: "stub")!
 }
 
 public extension URL {