Fix scripts for Next.js + Payload CMS workflow

- new-project.sh: Use nextjs-payload-starter template, Next.js AI rules
- convert-astro.sh: Complete rewrite to migrate Astro MDX to Payload CMS Lexical JSON
- deploy.sh: Check for next.config instead of astro.config.mjs, use MONGODB_URL
- preview.sh: Check for Next.js, default port 3002
- audit-seo.sh: Check .tsx pages in src/app, Next.js config

All scripts now properly support Next.js + Payload CMS workflow.

skills/website-creator/scripts/new-project.sh

@@ -1,11 +1,11 @@
 #!/usr/bin/env bash
 #===============================================================================
-# new-project.sh - สร้าง Astro + Payload CMS project ใหม่จาก Astro Starter Template
+# new-project.sh - สร้าง Next.js + Payload CMS project ใหม่จาก Template
 #
 # Usage: ./new-project.sh [project-name] [project-path]
 #
-# สร้าง Astro project ใหม่โดย:
-# 1. คัดลอก astro-starter template
+# สร้าง Next.js + Payload CMS project ใหม่โดย:
+# 1. คัดลอก nextjs-payload-starter template
 # 2. ติดตั้ง dependencies
 # 3. ตั้งค่า environment
 #
@@ -31,7 +31,7 @@ PROJECT_PATH="${2:-.}"
 
 # Get skill directory
 SKILL_DIR="$(dirname "$(dirname "$(readlink -f "$0")")")"
-TEMPLATE_DIR="$SKILL_DIR/templates/astro-starter"
+TEMPLATE_DIR="$SKILL_DIR/templates/nextjs-payload-starter"
 
 #-------------------------------------------------------------------------------
 # Helper functions
@@ -57,7 +57,7 @@ print_usage() {
     cat << EOF
 Usage: $(basename "$0") [project-name] [project-path]
 
-สร้าง Astro + Payload CMS project ใหม่จาก Astro Starter Template
+  สร้าง Next.js + Payload CMS project ใหม่จาก Template
 
 Arguments:
   project-name    ชื่อ project (optional)
@@ -103,7 +103,7 @@ check_requirements() {
 
     # Check template exists
     if [ ! -d "$TEMPLATE_DIR" ]; then
-        log_error "ไม่พบ Astro Starter Template: $TEMPLATE_DIR"
+        log_error "ไม่พบ Next.js Payload Starter Template: $TEMPLATE_DIR"
         exit 1
     fi
 
@@ -143,7 +143,7 @@ setup_directory() {
 #-------------------------------------------------------------------------------
 
 copy_template() {
-    log_info "คัดลอก Astro Starter Template..."
+    log_info "คัดลอก Next.js Payload Starter Template..."
 
     # Copy all template files
     cp -r "$TEMPLATE_DIR/"* "$PROJECT_PATH/"
@@ -237,9 +237,9 @@ create_ai_rules() {
 
 ## Tech Stack Overview
 
-- **Frontend:** Astro เวอร์ชั่นล่าสุด + TypeScript
+- **Frontend:** Next.js App Router + TypeScript
 - **Backend/CMS:** Payload CMS 3.0
-- **Database:** PostgreSQL (via Payload)
+- **Database:** MongoDB (via mongooseAdapter)
 - **Styling:** Tailwind CSS v4
 - **Authentication:** Payload built-in auth with role-based access
 - **Image Handling:** Payload Media collection
@@ -247,9 +247,9 @@ create_ai_rules() {
 ## File Organization
 
 - **Collections:** Define Payload collections in `src/collections/`
-- **Pages:** Use Astro file-based routing in `src/pages/`
+- **Pages:** Next.js App Router in `src/app/`
 - **Components:** Reusable components in `src/components/`
-- **Styles:** Global styles in `src/styles/`
+- **Styles:** Global styles in `src/app/globals.css`
 
 ## Never Modify These Files
 
@@ -279,7 +279,7 @@ init_git() {
     if [ ! -d ".git" ]; then
         git init
         git add .
-        git commit -m "Initial commit: Astro + Payload CMS starter"
+        git commit -m "Initial commit: Next.js + Payload CMS starter"
         log_success "เริ่มต้น git เสร็จสมบูรณ์"
     else
         log_info "git repo มีอยู่แล้ว"
@@ -303,8 +303,8 @@ show_structure() {
 
 main() {
     echo "=============================================="
-    echo "  Astro + Payload CMS Project Creator"
-    echo "  Using Astro Starter Template"
+    echo "  Next.js + Payload CMS Project Creator"
+    echo "  Using Next.js Payload Starter"
     echo "=============================================="
     echo ""
 
@@ -327,16 +327,15 @@ main() {
 
     echo ""
     echo "=============================================="
-    log_success "สร้าง Astro + Payload CMS project เสร็จสมบูรณ์!"
+    log_success "สร้าง Next.js + Payload CMS project เสร็จสมบูรณ์!"
     echo "=============================================="
     echo ""
     echo "ขั้นตอนถัดไป:"
     echo "  1. cd $PROJECT_PATH"
-    echo "  2. แก้ไข .env (DATABASE_URL, PAYLOAD_SECRET)"
-    echo "  3. npm run db:push (สร้าง database tables)"
-    echo "  4. npm run generate (สร้าง Payload types)"
-    echo "  5. npm run dev"
-    echo "  6. เปิด http://localhost:4321/admin สำหรับ Payload admin"
+    echo "  2. แก้ไข .env (MONGODB_URL, PAYLOAD_SECRET)"
+    echo "  3. npm install"
+    echo "  4. npm run dev"
+    echo "  5. เปิด http://localhost:3002/admin สำหรับ Payload admin"
     echo ""
 }