Polish UX: auto-redirect on create, fix design consistency

- createModule now redirects to module page after creation
- createLesson now redirects to lesson editor after creation
- Regenerate Prisma client to fix missing types (category, accessLog, expiresAt)
- Rewrite sortable-modules/lessons with Second Brain design tokens (remove amber/slate)
- Rewrite lesson-editor toolbar and toggle with design tokens
- Fix register page/form: replace amber theme with card-aubade design

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/(auth)/register/page.tsx

@@ -2,13 +2,17 @@ import { RegisterForm } from "./register-form";
 
 export default function RegisterPage() {
   return (
-    <div className="min-h-screen flex items-center justify-center bg-amber-50">
-      <div className="w-full max-w-md">
+    <div className="min-h-screen flex items-center justify-center" style={{ backgroundColor: "var(--background)" }}>
+      <div className="w-full max-w-sm">
         <div className="text-center mb-8">
-          <h1 className="text-3xl font-bold text-amber-900">Second Brain</h1>
-          <p className="text-amber-700 mt-2">Создайте аккаунт</p>
+          <h1 className="text-2xl font-bold tracking-wide" style={{ color: "var(--foreground)" }}>
+            Second Brain
+          </h1>
+          <p className="mt-1 text-sm uppercase tracking-widest" style={{ color: "var(--muted-foreground)", fontSize: "0.65rem" }}>
+            Образовательная платформа
+          </p>
         </div>
-        <div className="bg-white rounded-2xl shadow-sm border border-amber-100 p-8">
+        <div className="card-aubade p-8">
           <RegisterForm />
         </div>
       </div>