Address code review feedback

- Remove unused originalMessage parameter from _getUserFriendlyMessage
- Add rate limiting to user-initiated error reports
- Fix empty description showing "Technical details" toggle

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

lib/services/error_reporting_service.dart

@@ -78,10 +78,24 @@ class ErrorReportingService {
   /// User-initiated error report (e.g., from "Report issue" button).
   ///
   /// Returns true if the report was sent successfully.
+  /// Rate-limited to prevent accidental spam from repeated taps.
   Future<bool> reportUserError({
     required String title,
     String? technicalDetails,
   }) async {
+    // Check session limit
+    if (_sessionReportCount >= _maxReportsPerSession) {
+      return false;
+    }
+
+    // Rate limit by error content
+    final errorHash = '$title\n${technicalDetails ?? ''}'.hashCode;
+    final lastReport = _reportedErrors[errorHash];
+    if (lastReport != null &&
+        DateTime.now().difference(lastReport) < _rateLimitDuration) {
+      return false;
+    }
+
     try {
       // Create ephemeral signer for error reporting
       final signer = Bip340PrivateKeySigner(Utils.generateRandomHex64(), ref);
@@ -102,6 +116,10 @@ class ErrorReportingService {
         signedDm,
       }, source: const RemoteSource(relays: 'social'));
 
+      // Update rate limiting
+      _reportedErrors[errorHash] = DateTime.now();
+      _sessionReportCount++;
+
       return true;
     } catch (e) {
       debugPrint('[ErrorReporting] Failed to send user report: $e');

lib/services/notification_service.dart

@@ -298,7 +298,8 @@ class _ToastContentState extends State<_ToastContent> {
 
   @override
   Widget build(BuildContext context) {
-    final hasDescription = widget.description != null;
+    final hasDescription =
+        widget.description != null && widget.description!.isNotEmpty;
     final hasActions = widget.actions.isNotEmpty;
     final hasExtraContent = hasDescription || hasActions;
 

lib/services/package_manager/android_package_manager.dart

@@ -272,7 +272,7 @@ final class AndroidPackageManager extends PackageManager {
 
       case InstallStatus.failed:
         final failureType = _errorCodeToFailureType(errorCode, message);
-        final userMessage = _getUserFriendlyMessage(failureType, message);
+        final userMessage = _getUserFriendlyMessage(failureType);
         // Preserve technical details: combine original message and description
         final technicalDetails = [
           if (message != null) message,
@@ -373,7 +373,7 @@ final class AndroidPackageManager extends PackageManager {
 
   /// Convert failure type to user-friendly message.
   /// Technical details are preserved in the description field.
-  String _getUserFriendlyMessage(FailureType type, String? originalMessage) {
+  String _getUserFriendlyMessage(FailureType type) {
     return switch (type) {
       FailureType.downloadFailed => 'Download failed. Please try again.',
       FailureType.hashMismatch =>