Redesign repo-to-social landing hero

[moose-lab]

Summary

• Reframes the homepage header, hero, workflow, studio, pricing, and metadata around the repo-to-social launch-package product.
• Reworks the hero visual stage into a grid workbench so repo playback, output stack, generated social preview, and flow rail do not overlap.
• Normalizes deck/PPT leakage in generated landing surfaces to thread/social wording while keeping backend compatibility.

Verification

• npm test
• npm run build
• Desktop screenshot: /tmp/quickfork-clean-repo-social-desktop-wait.png
• Mobile screenshot: /tmp/quickfork-clean-repo-social-mobile-wait.png

Notes

• Stitch Web tooling was not exposed in this environment, so this implements the Stitch redesign direction directly in the Vite/React landing surface.