feat: agregar soporte nativo de visualizacion FBX con THREE.FBXLoader para mostrar mallas cuadrilateras (Quads) en tiempo real

feat: complete serverless migration with clean secure environment variables

fix: show auth overlay by default

feat: connect Supabase Auth client-side for registration and login

feat: add global header background task progress banner for 2D and 3D generations

Update default 3d resolution to 1536 and texture size to 4096 for mobile

fix: integrate profile and privacy modal handlers in desktop view

fix: restore full user dropdown menu with profile avatar and options

Bump static assets version to v=200 to force browser cache bypass

Add interactive Cropper.js modal for cropping and framing subjects before 3D model generation

Unify 2D image viewer overlay and remove gallery grid animation delay flicker on filter tab click

Eliminate PC mode page load flash by hiding app-container and activating auth-overlay by default

Eliminate login screen flash on page load when already authenticated

Replace separate username text and exit button with a single highlighted user menu pill and dropdown menu

Remove mobile QR button from PC viewer bottom floating toolbar

Position user/credits badges above titles, bypass warning overlay on explicit desktop mode click, and bump version parameter to v=123

Implement cache busting query parameters on all redirects to viewer.html to prevent stale cached mobile view

Auto-detect mobile and redirect immediately to viewer.html on load

Add responsive mobile 3D model viewer with Google model-viewer and QR code sharing modal

Bump script version to force browser cache refresh

Show credit costs on generation action buttons for improved transparency

Implement SaaS Credits MVP system with db schema migration, credits validations, and checkout store modal

Ensure explicit top: 0 and left: 0 positioning on authBgCanvas and authOverlay to prevent flexbox shifting

Implement inline login and register error message alerts inside forms

Fix login overlay flash by adding active class by default

Enhance 3D background with brighter lights and 12 distinct floating geometric shapes