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/utils/format.js

@@ -1,9 +1,9 @@
 // 数字格式化函数
 export function formatNumber(num) {
   if (num === null || num === undefined) return '0'
-  
+
   const absNum = Math.abs(num)
-  
+
   if (absNum >= 1e9) {
     return (num / 1e9).toFixed(2) + 'B'
   } else if (absNum >= 1e6) {
@@ -11,23 +11,23 @@ export function formatNumber(num) {
   } else if (absNum >= 1e3) {
     return (num / 1e3).toFixed(1) + 'K'
   }
-  
+
   return num.toLocaleString()
 }
 
 // 日期格式化函数
 export function formatDate(date, format = 'YYYY-MM-DD HH:mm:ss') {
   if (!date) return ''
-  
+
   const d = new Date(date)
-  
+
   const year = d.getFullYear()
   const month = String(d.getMonth() + 1).padStart(2, '0')
   const day = String(d.getDate()).padStart(2, '0')
   const hours = String(d.getHours()).padStart(2, '0')
   const minutes = String(d.getMinutes()).padStart(2, '0')
   const seconds = String(d.getSeconds()).padStart(2, '0')
-  
+
   return format
     .replace('YYYY', year)
     .replace('MM', month)
@@ -40,7 +40,7 @@ export function formatDate(date, format = 'YYYY-MM-DD HH:mm:ss') {
 // 相对时间格式化
 export function formatRelativeTime(date) {
   if (!date) return ''
-  
+
   const now = new Date()
   const past = new Date(date)
   const diffMs = now - past
@@ -48,7 +48,7 @@ export function formatRelativeTime(date) {
   const diffMins = Math.floor(diffSecs / 60)
   const diffHours = Math.floor(diffMins / 60)
   const diffDays = Math.floor(diffHours / 24)
-  
+
   if (diffDays > 0) {
     return `${diffDays}天前`
   } else if (diffHours > 0) {
@@ -63,12 +63,12 @@ export function formatRelativeTime(date) {
 // 字节格式化
 export function formatBytes(bytes, decimals = 2) {
   if (bytes === 0) return '0 Bytes'
-  
+
   const k = 1024
   const dm = decimals < 0 ? 0 : decimals
   const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']
-  
+
   const i = Math.floor(Math.log(bytes) / Math.log(k))
-  
+
   return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i]
-}
+}