chore: clean up repo for public release

- Remove BMAD framework, IDE configs, dev screenshots, test files,
  internal docs, and backup files
- Rename keep-notes/ to memento-note/
- Update all references from keep-notes to memento-note
- Add Apache 2.0 license with Commons Clause (non-commercial restriction)
- Add clean .gitignore and .env.docker.example

memento-note/app/(main)/layout.tsx

@@ -0,0 +1,41 @@
+import { HeaderWrapper } from "@/components/header-wrapper";
+import { Sidebar } from "@/components/sidebar";
+import { ProvidersWrapper } from "@/components/providers-wrapper";
+import { auth } from "@/auth";
+import { detectUserLanguage } from "@/lib/i18n/detect-user-language";
+import { loadTranslations } from "@/lib/i18n/load-translations";
+
+export default async function MainLayout({
+  children,
+}: Readonly<{
+  children: React.ReactNode;
+}>) {
+  // Run auth + language detection + translation loading in parallel
+  const [session, initialLanguage] = await Promise.all([
+    auth(),
+    detectUserLanguage(),
+  ]);
+
+  // Load initial translations server-side to prevent hydration mismatch
+  const initialTranslations = await loadTranslations(initialLanguage);
+
+  return (
+    <ProvidersWrapper initialLanguage={initialLanguage} initialTranslations={initialTranslations}>
+      <div className="bg-background-light dark:bg-background-dark font-display text-slate-900 dark:text-white overflow-hidden h-screen flex flex-col">
+        {/* Top Navigation - Style Keep */}
+        <HeaderWrapper user={session?.user} />
+
+        {/* Main Layout */}
+        <div className="flex flex-1 overflow-hidden">
+          {/* Sidebar Navigation - Style Keep */}
+          <Sidebar className="w-64 flex-none flex-col bg-white dark:bg-[#1e2128] border-e border-slate-200 dark:border-slate-800 overflow-y-auto hidden md:flex" user={session?.user} />
+
+          {/* Main Content Area */}
+          <main className="flex min-h-0 flex-1 flex-col overflow-y-auto bg-background-light dark:bg-background-dark p-4 scroll-smooth">
+            {children}
+          </main>
+        </div>
+      </div>
+    </ProvidersWrapper>
+  );
+}