Port LoRA trigger tag selection UI from SwarmUI_2026-02-10

[Reaper176]

Summary

• ports LoRA trigger phrase tag selection UI from SwarmUI_2026-02-10 into swarm-clean
• supports selecting individual trigger tags and copying selected tags
• default behavior of copy button is preserved so no selection results in entire block being copied.
• keeps trailing-comma copy setting behavior and clears selection after copy