Ctrl+S: pause/start for streaming

[ynqa]

No description provided.

[Copilot]

Pull request overview

Adds a streaming pause/resume toggle to sig so users can temporarily stop (and restart) ingesting new lines during streaming mode.

Changes:

• Introduces a new Ctrl+S keybinding to toggle paused state during streaming.
• Implements pause signaling between the UI loop and the stream-ingestion/render task via a tokio::sync::watch channel.
• Documents the new keybinding in the README.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

File	Description
src/sig.rs	Adds Ctrl+S handling and a watch-channel-driven pause mechanism in the streaming ingestion/render loop.
README.md	Documents Ctrl+S as Pause/Resume for stream ingestion.

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[Copilot]

The queue-size limiting condition allows the queue to temporarily grow to queue_capacity + 1 because it only pops when len() > queue_capacity and then immediately pushes. If queue_capacity is intended as a strict max retained lines, this should pop when len() >= queue_capacity (and handle queue_capacity == 0 explicitly).

Suggested change

	if queue.len() > queue_capacity {
	queue.pop_front().unwrap();
	}
	queue.push_back(line.clone());
	if queue_capacity > 0 {
	if queue.len() >= queue_capacity {
	queue.pop_front().unwrap();
	}
	queue.push_back(line.clone());
	}