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/api/notebooks/reorder/route.ts

@@ -0,0 +1,62 @@
+import { NextRequest, NextResponse } from 'next/server'
+import prisma from '@/lib/prisma'
+import { auth } from '@/auth'
+import { revalidatePath } from 'next/cache'
+
+// POST /api/notebooks/reorder - Reorder notebooks
+export async function POST(request: NextRequest) {
+  const session = await auth()
+  if (!session?.user?.id) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
+  }
+
+  try {
+    const body = await request.json()
+    const { notebookIds } = body
+
+    if (!Array.isArray(notebookIds)) {
+      return NextResponse.json(
+        { success: false, error: 'notebookIds must be an array' },
+        { status: 400 }
+      )
+    }
+
+    // Verify all notebooks belong to the user
+    const notebooks = await prisma.notebook.findMany({
+      where: {
+        id: { in: notebookIds },
+        userId: session.user.id
+      },
+      select: { id: true }
+    })
+
+    if (notebooks.length !== notebookIds.length) {
+      return NextResponse.json(
+        { success: false, error: 'One or more notebooks not found or unauthorized' },
+        { status: 403 }
+      )
+    }
+
+    // Update order for each notebook
+    const updates = notebookIds.map((id, index) =>
+      prisma.notebook.update({
+        where: { id },
+        data: { order: index }
+      })
+    )
+
+    await prisma.$transaction(updates)
+
+    revalidatePath('/')
+
+    return NextResponse.json({
+      success: true,
+      message: 'Notebooks reordered successfully'
+    })
+  } catch (error) {
+    return NextResponse.json(
+      { success: false, error: 'Failed to reorder notebooks' },
+      { status: 500 }
+    )
+  }
+}