Show non-Zapstore installer package ID in app info.

Expose Android install-source package names so users can see when an app was installed from Play Store or another channel.

android/app/src/main/kotlin/dev/zapstore/app/plugins/AndroidPackageManagerPlugin.kt

@@ -1854,11 +1854,25 @@ class AndroidPackageManagerPlugin :
                     "versionName" to pkg.versionName,
                     "versionCode" to versionCode,
                     "signatureHashes" to getSignatureHashes(pkg.packageName),
+                    "installerPackageName" to getInstallerPackageName(pkg.packageName),
                     "canInstallSilently" to canInstallSilently(pkg.packageName)
             )
         }
     }
 
+    private fun getInstallerPackageName(packageName: String): String? {
+        return try {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+                context.packageManager.getInstallSourceInfo(packageName).installingPackageName
+            } else {
+                @Suppress("DEPRECATION")
+                context.packageManager.getInstallerPackageName(packageName)
+            }
+        } catch (_: Exception) {
+            null
+        }
+    }
+
     private fun getSignatureHashes(packageName: String): List<String> {
         return try {
             val pm = context.packageManager

lib/services/package_manager/android_package_manager.dart

@@ -512,6 +512,8 @@ final class AndroidPackageManager extends PackageManager {
       versionCode: target.versionCode,
       signatureHashes: existingPkg?.signatureHashes ?? const [],
       installTime: DateTime.now(),
+      installerPackageName:
+          existingPkg?.installerPackageName ?? kZapstoreAppIdentifier,
       canInstallSilently: existingPkg?.canInstallSilently ?? false,
     );
     state = state.copyWith(installed: {...state.installed, appId: newPkg});
@@ -794,6 +796,7 @@ final class AndroidPackageManager extends PackageManager {
             ? rawHashes.cast<String>().toList()
             : <String>[];
         final canInstallSilently = app['canInstallSilently'] as bool? ?? false;
+        final installerPackageName = app['installerPackageName'] as String?;
 
         if (canInstallSilently) anyCanInstallSilently = true;
 
@@ -805,6 +808,7 @@ final class AndroidPackageManager extends PackageManager {
             versionCode: versionCode,
             signatureHashes: signatureHashes,
             installTime: null,
+            installerPackageName: installerPackageName,
             canInstallSilently: canInstallSilently,
           );
         }

lib/services/package_manager/background_package_manager.dart

@@ -77,6 +77,7 @@ final class BackgroundPackageManager extends PackageManager {
               ? rawHashes.cast<String>().toList()
               : const [],
           installTime: null,
+          installerPackageName: app['installerPackageName'] as String?,
           canInstallSilently: app['canInstallSilently'] as bool? ?? false,
         );
       }

lib/services/package_manager/installed_packages_snapshot.dart

@@ -26,6 +26,7 @@ class InstalledPackagesSnapshot {
               'version': p.version,
               'versionCode': p.versionCode,
               'signatureHashes': p.signatureHashes,
+              'installerPackageName': p.installerPackageName,
               'canInstallSilently': p.canInstallSilently,
             },
           )
@@ -87,6 +88,7 @@ class InstalledPackagesSnapshot {
           versionCode: map['versionCode'] as int?,
           signatureHashes: signatureHashes,
           installTime: null,
+          installerPackageName: map['installerPackageName'] as String?,
           canInstallSilently: (map['canInstallSilently'] as bool?) ?? false,
         );
       }

lib/services/package_manager/package_manager.dart

@@ -26,6 +26,7 @@ class PackageInfo extends Equatable {
     this.signatureHashes = const [],
     this.name,
     this.installTime,
+    this.installerPackageName,
     this.canInstallSilently = false,
   });
 
@@ -35,6 +36,10 @@ class PackageInfo extends Equatable {
   final int? versionCode;
   final List<String> signatureHashes;
   final DateTime? installTime;
+
+  /// Package ID of the app that installed this package, if known.
+  /// Examples: `dev.zapstore.app`, `com.android.vending` (Play Store).
+  final String? installerPackageName;
   final bool canInstallSilently;
 
   @override
@@ -45,6 +50,7 @@ class PackageInfo extends Equatable {
     versionCode,
     signatureHashes,
     installTime,
+    installerPackageName,
     canInstallSilently,
   ];
 }

lib/widgets/app_info_table.dart

@@ -5,6 +5,7 @@ import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:intl/intl.dart';
 import 'package:models/models.dart';
 import 'package:url_launcher/url_launcher.dart';
+import 'package:zapstore/services/package_manager/package_manager.dart';
 import 'package:zapstore/utils/extensions.dart';
 import 'package:zapstore/widgets/app_detail_widgets.dart';
 import 'package:zapstore/widgets/author_container.dart';
@@ -86,6 +87,21 @@ class AppInfoTable extends HookConsumerWidget {
 
     rows.add(_InfoRow(label: 'App ID', value: app.identifier));
 
+    final installedPackage = ref.watch(
+      installedPackageProvider(app.identifier),
+    );
+    final installerPackageName = installedPackage?.installerPackageName;
+    if (installerPackageName != null &&
+        installerPackageName != kZapstoreAppIdentifier) {
+      rows.add(
+        _InfoRow(
+          label: 'Installer',
+          value: installerPackageName,
+          copyValue: installerPackageName,
+        ),
+      );
+    }
+
     if (identityProof != null) {
       final npub = Utils.encodeShareableFromString(
         identityProof!.pubkey,
@@ -154,7 +170,6 @@ class AppInfoTable extends HookConsumerWidget {
       }
 
       if (fileMetadata!.versionCode != null) {
-        final installedPackage = app.installedPackage;
         final installedVersionCode = installedPackage?.versionCode;
         final availableVersionCode = fileMetadata!.versionCode!;