v1.2.0

Added

• Meta AI (Muse Spark) provider — enabled and starred out of the box.
• Paste-keys import — drop in a blob of API keys (any layout) and RēDesign figures out which service each one belongs to and files them.
• Browse & add models — pick a provider, add any of its live models in one click, plus a starred-models tier and a per-model copies stepper.
• Portable window mode — run in a chromeless app window instead of a browser tab.

Changed

• Cost estimates now show a low–high band; Mock runs no longer count as real spend.
• Settings split into tabs; the viewer gets a View-options flyout.