Fix auth form errors and redirects: Add React keys/useEffects for error rendering and scroll, Inertia::location in controllers for SPA navigation, extend RegistrationTest and add E2E. Update docs (changes/2025-10-02-registration-fixes.md, prp/13-backend-authentication.md). Add new UI components (accordion, carousel, progress, table, tabs), marketing/legal pages (Blog, Kontakt, Datenschutz, etc.), fonts, user migration (remove_name), views/css/package updates, seeders/factories.

resources/js/components/ui/progress.tsx

@@ -0,0 +1,26 @@
+import * as React from "react"
+import * as ProgressPrimitive from "@radix-ui/react-progress"
+
+import { cn } from "@/lib/utils"
+
+const Progress = React.forwardRef<
+  React.ElementRef<typeof ProgressPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof ProgressPrimitive.Root>
+>(({ className, value, ...props }, ref) => (
+  <ProgressPrimitive.Root
+    ref={ref}
+    className={cn(
+      "relative h-2 w-full overflow-hidden rounded-full bg-primary/20",
+      className
+    )}
+    {...props}
+  >
+    <ProgressPrimitive.Indicator
+      className="h-full w-full flex-1 bg-primary transition-all"
+      style={{ transform: `translateX(-${100 - (value || 0)}%)` }}
+    />
+  </ProgressPrimitive.Root>
+))
+Progress.displayName = ProgressPrimitive.Root.displayName
+
+export { Progress }