[nathanfx330]

Purpose

Replace the two stacked Redleaf Hub launcher/status banners with one unified studio bar.

Changes

• Exactly one 82px banner when a Redleaf server is online instead of two stacked 82px banners.
• One green server-online indicator and selected Redleaf project name.
• Launch Node Leaf and Launch MLT Player are positioned side by side in the same bar.
• MLT Player without configured executable still links to Settings. Node Leaf launch behavior and MLT launch arguments remain unchanged.
• Compact windows show short action labels rather than overflowing.
• Uses the existing Hub dark charcoal background, red button gradient and green status dot without introducing other colors.
• Widget tests cover the single-banner layout and compact-window actions.

Validate

flutter analyze
flutter test
flutter run -d linux

Start a Redleaf project server in the Library and verify there is only one green online banner with two launcher buttons. Resize the Hub window and confirm both remain visible and launch correctly. Disconnect Redleaf and verify the banner collapses.

Draft PR. Do not merge until Linux GUI acceptance.