refactor: update MITM bypass logic and enhance combo name validation

src/app/api/combos/[id]/route.js

@@ -2,7 +2,7 @@ import { NextResponse } from "next/server";
 import { getComboById, updateCombo, deleteCombo, getComboByName } from "@/lib/localDb";
 
 // Validate combo name: only a-z, A-Z, 0-9, -, _
-const VALID_NAME_REGEX = /^[a-zA-Z0-9_-]+$/;
+const VALID_NAME_REGEX = /^[a-zA-Z0-9_.\-]+$/;
 
 // GET /api/combos/[id] - Get combo by ID
 export async function GET(request, { params }) {
@@ -30,7 +30,7 @@ export async function PUT(request, { params }) {
     // Validate name format if provided
     if (body.name) {
       if (!VALID_NAME_REGEX.test(body.name)) {
-        return NextResponse.json({ error: "Name can only contain letters, numbers, - and _" }, { status: 400 });
+        return NextResponse.json({ error: "Name can only contain letters, numbers, -, _ and ." }, { status: 400 });
       }
       
       // Check if name already exists (exclude current combo)