fix: editor native layout, UI polish, meme templates auth, pipeline export, install queuing

- Remove editor from AppLayout so it owns the full viewport with no sidebar/padding
- Add back-arrow in menu bar for navigation, restyle menu bar to match native app feel
- Slim left toolbar from 48px to 36px with smaller icons and subtler dividers
- Fix options bar overlapping canvas via shrink-0 and overflow-hidden
- Fix opacity/blend controls clipping in right panel with min-w-0 on flex children
- Add global range slider CSS for consistent thin-track + round-thumb styling
- Make meme template routes public so img tags can load without Bearer auth
- Show pipeline export buttons in default compact view, not just expanded hover
- Queue individual AI feature installs instead of erroring when one is active

apps/api/src/plugins/auth.ts

@@ -765,6 +765,7 @@ const PUBLIC_PATHS = [
   "/api/v1/jobs/",
   "/api/docs",
   "/api/v1/openapi.yaml",
+  "/api/v1/meme-templates/",
 ];
 
 function isPublicRoute(url: string): boolean {