feat: add functionality to clear category assignments from transactions and display categorized count in settings

app/api/banking/transactions/clear-categories/route.ts

@@ -0,0 +1,24 @@
+import { NextResponse } from "next/server"
+import { prisma } from "@/lib/prisma"
+
+export async function POST() {
+  try {
+    const result = await prisma.transaction.updateMany({
+      where: {
+        categoryId: { not: null },
+      },
+      data: {
+        categoryId: null,
+      },
+    })
+
+    return NextResponse.json({
+      success: true,
+      count: result.count,
+    })
+  } catch (error) {
+    console.error("Error clearing categories:", error)
+    return NextResponse.json({ error: "Failed to clear categories" }, { status: 500 })
+  }
+}
+