fix(parser): Use sender field for SENT_CHAN in meshcore-cli 1.3.12+

Fix channel message sender name display. In meshcore-cli 1.3.12, the 'name'
field in SENT_CHAN entries now contains the channel name instead of the
sender's device name. Update parser to use the 'sender' field instead.

Before: Sent messages showed "channel 0" as sender
After: Sent messages correctly show "MarWoj" (actual sender name)

This change is consistent with the SENT_MSG parsing for Direct Messages.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

app/meshcore/parser.py

@@ -47,8 +47,8 @@ def parse_message(line: Dict, allowed_channels: Optional[List[int]] = None) -> O
 
     # Extract sender name
     if is_own:
-        # For sent messages, use device name from config or 'name' field
-        sender = line.get('name', config.MC_DEVICE_NAME)
+        # For sent messages, use 'sender' field (meshcore-cli 1.3.12+)
+        sender = line.get('sender', config.MC_DEVICE_NAME)
         content = text
     else:
         # For received messages, extract sender from "SenderName: message" format