refactor: standardize code formatting and linting configuration

- Replace .eslintrc.js with .eslintrc.cjs for better ES module compatibility
- Add .prettierrc configuration for consistent code formatting
- Update package.json with new lint and format scripts
- Add nodemon.json for development hot reloading configuration
- Standardize code formatting across all JavaScript and Vue files
- Update web admin SPA with improved linting rules and formatting
- Add prettier configuration to web admin SPA

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

web/admin-spa/src/components/common/StatCard.vue

@@ -2,16 +2,13 @@
   <div class="stat-card">
     <div class="flex items-start justify-between">
       <div class="flex-1">
-        <p class="text-xs sm:text-sm font-medium text-gray-600 mb-1">
+        <p class="mb-1 text-xs font-medium text-gray-600 sm:text-sm">
           {{ title }}
         </p>
-        <p class="text-2xl sm:text-3xl font-bold text-gray-800">
+        <p class="text-2xl font-bold text-gray-800 sm:text-3xl">
           {{ value }}
         </p>
-        <p
-          v-if="subtitle"
-          class="text-xs sm:text-sm text-gray-500 mt-1.5 sm:mt-2"
-        >
+        <p v-if="subtitle" class="mt-1.5 text-xs text-gray-500 sm:mt-2 sm:text-sm">
           {{ subtitle }}
         </p>
       </div>
@@ -62,4 +59,4 @@ const iconBgClass = computed(() => {
 
 <style scoped>
 /* 使用全局样式中定义的 .stat-card 和 .stat-icon 类 */
-</style>
+</style>