feat(frontend/vditor): 实现基于 FFmpeg.wasm 的视频压缩功能

- 添加视频压缩相关配置和工具函数
- 实现 FFmpeg.wasm 初始化和视频压缩功能
- 优化文件上传流程，支持视频文件压缩

frontend_nuxt/nuxt.config.ts

@@ -1,9 +1,21 @@
 import { defineNuxtConfig } from 'nuxt/config'
+import { createRequire } from 'node:module'
 
+const require = createRequire(import.meta.url)
+const appPkg = require('./package.json') as {
+  dependencies?: Record<string, string>
+  devDependencies?: Record<string, string>
+}
+const ffmpegVersion = (
+  process.env.NUXT_PUBLIC_FFMPEG_VERSION ||
+  appPkg.dependencies?.['@ffmpeg/ffmpeg'] ||
+  appPkg.devDependencies?.['@ffmpeg/ffmpeg'] ||
+  '0.12.15'
+).replace(/^[^\d]*/, '')
 export default defineNuxtConfig({
   devServer: {
     host: '0.0.0.0',
-    port: 3000
+    port: 3000,
   },
   ssr: true,
   modules: ['@nuxt/image'],
@@ -17,6 +29,7 @@ export default defineNuxtConfig({
       discordClientId: process.env.NUXT_PUBLIC_DISCORD_CLIENT_ID || '',
       twitterClientId: process.env.NUXT_PUBLIC_TWITTER_CLIENT_ID || '',
       telegramBotId: process.env.NUXT_PUBLIC_TELEGRAM_BOT_ID || '',
+      ffmpegVersion,
     },
   },
   css: [