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.

SFI/ApplicationDelegate.swift

@@ -85,7 +85,7 @@ class ApplicationDelegate: NSObject, UIApplicationDelegate, UNUserNotificationCe
     @available(iOS 16.0, *)
     private nonisolated func registerFileProviderDomain() {
         let domain = NSFileProviderDomain(
-            identifier: NSFileProviderDomainIdentifier("io.nekohasekai.sfavt.workingdir"),
+            identifier: NSFileProviderDomainIdentifier(AppConfiguration.fileProviderDomainID),
             displayName: "sing-box"
         )
         NSFileProviderManager.add(domain) { error in

SFI/Info.plist

@@ -2,9 +2,13 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
+	<key>BasePackageIdentifier</key>
+	<string>$(BASE_PACKAGE_IDENTIFIER)</string>
+	<key>AppGroupIdentifier</key>
+	<string>$(APP_GROUP_IDENTIFIER)</string>
 	<key>BGTaskSchedulerPermittedIdentifiers</key>
 	<array>
-		<string>io.nekohasekai.sfavt.update_profiles</string>
+		<string>$(BASE_PACKAGE_IDENTIFIER).update_profiles</string>
 	</array>
 	<key>CFBundleDocumentTypes</key>
 	<array>
@@ -19,7 +23,7 @@
 			<string>Owner</string>
 			<key>LSItemContentTypes</key>
 			<array>
-				<string>io.nekohasekai.sfavt.profile</string>
+				<string>$(BASE_PACKAGE_IDENTIFIER).profile</string>
 			</array>
 		</dict>
 	</array>
@@ -55,7 +59,7 @@
 	</dict>
 	<key>NSUbiquitousContainers</key>
 	<dict>
-		<key>iCloud.io.nekohasekai.sfavt</key>
+		<key>iCloud.$(BASE_PACKAGE_IDENTIFIER)</key>
 		<dict>
 			<key>NSUbiquitousContainerIsDocumentScopePublic</key>
 			<true/>
@@ -84,7 +88,7 @@
 			<key>UTTypeIconFiles</key>
 			<array/>
 			<key>UTTypeIdentifier</key>
-			<string>io.nekohasekai.sfavt.profile</string>
+			<string>$(BASE_PACKAGE_IDENTIFIER).profile</string>
 			<key>UTTypeTagSpecification</key>
 			<dict>
 				<key>public.filename-extension</key>
@@ -110,7 +114,7 @@
 				<string>AppIcon.icns</string>
 			</array>
 			<key>UTTypeIdentifier</key>
-			<string>io.nekohasekai.sfavt.profile</string>
+			<string>$(BASE_PACKAGE_IDENTIFIER).profile</string>
 			<key>UTTypeTagSpecification</key>
 			<dict>
 				<key>public.filename-extension</key>