fix: voice caption ordering, background audio, image persistence

Matthias Nott

2026-03-21 fa34201bc07e5312ff0c6825933cd02ce7900254

 lib/services/message_store.dart
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@@ -82,7 +82,7 @@
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       final jsonStr = await file.readAsString();
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       final List<dynamic> jsonList = jsonDecode(jsonStr) as List<dynamic>;
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       final allMessages = jsonList
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-          .map((j) => Message.fromJson(j as Map<String, dynamic>))
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+          .map((j) => _messageFromJson(j as Map<String, dynamic>))
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           .where((m) => !m.isEmptyVoice) // Filter out voice msgs with no content
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           .toList();
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@@ -106,7 +106,7 @@
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       final jsonStr = await file.readAsString();
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       final List<dynamic> jsonList = jsonDecode(jsonStr) as List<dynamic>;
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       return jsonList
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-          .map((j) => Message.fromJson(j as Map<String, dynamic>))
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+          .map((j) => _messageFromJson(j as Map<String, dynamic>))
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           .where((m) => !m.isEmptyVoice)
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           .toList();
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     } catch (e) {
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@@ -114,6 +114,29 @@
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     }
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   }
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+  /// Deserialize a message from JSON, applying migration rules:
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+  /// - Voice messages without audioUri are downgraded to text (transcript only).
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+  ///   This handles messages saved before a restart, where the temp audio file
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+  ///   is no longer available. The transcript (content) is preserved.
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+  static Message _messageFromJson(Map<String, dynamic> json) {
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+    final raw = Message.fromJson(json);
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+    if (raw.type == MessageType.voice &&
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+        (raw.audioUri == null || raw.audioUri!.isEmpty)) {
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+      // Downgrade to text so the bubble shows the transcript instead of a
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+      // broken play button.
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+      return Message(
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+        id: raw.id,
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+        role: raw.role,
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+        type: MessageType.text,
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+        content: raw.content,
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+        timestamp: raw.timestamp,
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+        status: raw.status,
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+        duration: raw.duration,
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+      );
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+    }
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+    return raw;
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+  }
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+
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   /// Delete stored messages for a session.
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   static Future<void> delete(String sessionId) async {
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     try {