[Bug] Enter Key Inserts Newline in Topic Input

[kaangrbz]

What did I do

While editing a topic in the subscription input field, I pressed Enter while the cursor was in the middle of the topic string.

Example topic: 27466482/WM/RES
If I place my cursor after the W and press Enter, the modal both submits/closes (as expected) and inserts an unwanted newline character into the topic.

What happened

MQTTX subscribed to an incorrect topic because pressing Enter inserted a newline (\r\n) into the topic input.

Using the example above, MQTTX ends up subscribing to:

27466482/W
M/RES

instead of the intended single-line topic.

Expected

Pressing Enter inside the topic input should:

• Trigger the modal action (add/edit subscription) only,
• Not insert a newline character into the topic string.

The topic input should always remain single-line.

Environment

• OS: macOS 15.6.1
• MQTTX version: v1.12.1

More detail

The issue seems to be that the topic field is accepting and storing newline characters (\r\n) when pressing Enter, even though it should behave as a single-line input.