feat: attach button with camera/gallery/files, atomic bundle send

Matthias Nott

2026-03-23 78f101ac853aeea5d17067bec4215e070fc71fed

 lib/screens/chat_screen.dart
..
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@@ -671,51 +671,45 @@
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     );
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     if (result == null || result.files.isEmpty) return;
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+    // Build attachments list
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+    final attachments = <Map<String, dynamic>>[];
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     for (final file in result.files) {
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       if (file.path == null) continue;
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       final bytes = await File(file.path!).readAsBytes();
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       final b64 = base64Encode(bytes);
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       final mimeType = _guessMimeType(file.name);
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-      final isImage = mimeType.startsWith('image/');
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-      if (isImage) {
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-        final message = Message.image(
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+      attachments.add({
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+        'data': b64,
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+        'mimeType': mimeType,
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+        'fileName': file.name,
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+      });
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+
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+      // Show in chat
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+      if (mimeType.startsWith('image/')) {
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+        ref.read(messagesProvider.notifier).addMessage(Message.image(
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           role: MessageRole.user,
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           imageBase64: b64,
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           content: file.name,
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           status: MessageStatus.sent,
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-        );
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-        ref.read(messagesProvider.notifier).addMessage(message);
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-        _ws?.send({
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-          'type': 'image',
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-          'imageBase64': b64,
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-          'mimeType': mimeType,
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-          'caption': file.name,
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-          'sessionId': targetSessionId,
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-        });
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+        ));
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       } else {
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-        // Non-image file: send as text with file info, save file to temp for session
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-        final tmpDir = await getTemporaryDirectory();
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-        final tmpPath = '${tmpDir.path}/${file.name}';
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-        await File(tmpPath).writeAsBytes(bytes);
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-
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-        final message = Message.text(
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+        ref.read(messagesProvider.notifier).addMessage(Message.text(
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           role: MessageRole.user,
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           content: '📎 ${file.name} (${_formatSize(bytes.length)})',
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           status: MessageStatus.sent,
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-        );
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-        ref.read(messagesProvider.notifier).addMessage(message);
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-        // Send file as base64 with metadata
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-        _ws?.send({
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-          'type': 'file',
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-          'fileBase64': b64,
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-          'fileName': file.name,
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-          'mimeType': mimeType,
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-          'fileSize': bytes.length,
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-          'sessionId': targetSessionId,
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-        });
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+        ));
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       }
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     }
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+
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+    // Send all files as one atomic bundle
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+    _ws?.send({
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+      'type': 'bundle',
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+      'caption': '',
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+      'attachments': attachments,
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+      'sessionId': targetSessionId,
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+    });
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+
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     _scrollToBottom();
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   }
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..
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@@ -839,8 +833,21 @@
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       textCaption = '';
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     }
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-    // Send voice FIRST so Whisper transcribes it and the [PAILot:voice] prefix
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-    // sets the reply channel. Images follow — Claude sees transcript + images together.
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+    // Send everything as a single atomic bundle — the server will compose
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+    // all attachments + caption into one terminal input (like dropping files + text)
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+    final attachments = encodedImages.map((b64) =>
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+      <String, dynamic>{'data': b64, 'mimeType': 'image/jpeg'}
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+    ).toList();
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+
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+    _ws?.send({
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+      'type': 'bundle',
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+      'caption': textCaption,
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+      if (voiceB64 != null) 'audioBase64': voiceB64,
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+      'attachments': attachments,
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+      'sessionId': targetSessionId,
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+    });
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+
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+    // If voice caption, also send separately for Whisper transcription
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     if (voiceB64 != null) {
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       final voiceMsg = Message.voice(
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         role: MessageRole.user,
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@@ -853,20 +860,6 @@
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         'audioBase64': voiceB64,
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         'content': '',
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         'messageId': voiceMsg.id,
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-        'sessionId': targetSessionId,
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-      });
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-    }
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-
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-    // Send images — first with text caption (if any), rest without
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-    for (var i = 0; i < encodedImages.length; i++) {
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-      final isFirst = i == 0;
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-      final msgCaption = isFirst ? textCaption : '';
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-
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-      _ws?.send({
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-        'type': 'image',
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-        'imageBase64': encodedImages[i],
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-        'mimeType': 'image/jpeg',
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-        'caption': msgCaption,
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         'sessionId': targetSessionId,
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       });
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     }