Umbra Studio v0.22.4

Umbra UI LoRA Controls

• Aligned Umbra UI LoRA tokens with Power Prompter's complete syntax format:
  <lora:name:model_strength:clip_strength>, including when both strengths
  are the same.
• Rebuilt the Umbra UI LoRA stack cards with preview thumbnails, explicit
  model and CLIP strength controls, and precise 0.05 increment buttons.
• Persisted LoRA preview metadata from the model browser so LoRA cards remain
  identifiable across TXT2IMG, IMG2IMG, and Inpaint workflows.