docs: note Cloudflare deploy needs Workers Paid Plan

The scene pipeline needs more CPU time than the Workers Free 10ms cap
allows, so Cloudflare deploys require Workers Paid. The old "pick
whichever you prefer" implied false cost parity with Vercel (free
Hobby works), so recommend the one-click Vercel deploy for personal
use. Applied to all three READMEs (zh/en/ja).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

README.en.md

@@ -39,7 +39,7 @@ Free to play, no setup required: [infiplot.com](https://infiplot.com)
 
 ## One-click deploy
 
-InfiPlot deploys to both Vercel and Cloudflare Workers — pick whichever you prefer.
+InfiPlot deploys to both Vercel and Cloudflare Workers. Cloudflare deployment requires the Workers Paid Plan because the scene pipeline needs longer CPU time; for personal use, the one-click Vercel deploy is recommended.
 
 [![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https://github.com/zonghaoyuan/infiplot&root-directory=apps/web&env=TEXT_BASE_URL,TEXT_API_KEY,TEXT_MODEL,IMAGE_BASE_URL,IMAGE_API_KEY,IMAGE_MODEL,VISION_BASE_URL,VISION_API_KEY,VISION_MODEL,TTS_BASE_URL,TTS_API_KEY,TTS_SPEECH_MODEL,MOCK_IMAGE&envDescription=Three%20required%20providers%20%2B%20optional%20TTS.%20Any%20OpenAI-compatible%20endpoint%20works%20for%20text%2Fvision.%20TTS%20uses%20MiMo%27s%20own%20protocol.&envLink=https://github.com/zonghaoyuan/infiplot/blob/main/README.en.md%23configuration-guide)   [![Deploy to Cloudflare](https://deploy.workers.cloudflare.com/button)](https://deploy.workers.cloudflare.com/?url=https://github.com/zonghaoyuan/infiplot/tree/main/apps/web)
 

README.ja.md

@@ -39,7 +39,7 @@ InfiPlot は、AI がコンテンツをリアルタイムに生成するイン
 
 ## ワンクリックデプロイ
 
-InfiPlot は Vercel と Cloudflare Workers の両方にそのままデプロイできます —— お好みの方をお選びください。
+InfiPlot は Vercel と Cloudflare Workers の両方にデプロイできます。Cloudflare へのデプロイはシーンパイプラインがより長い CPU 時間を必要とするため、Workers Paid Plan が必要です。個人利用には Vercel のワンクリックデプロイをおすすめします。
 
 [![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https://github.com/zonghaoyuan/infiplot&root-directory=apps/web&env=TEXT_BASE_URL,TEXT_API_KEY,TEXT_MODEL,IMAGE_BASE_URL,IMAGE_API_KEY,IMAGE_MODEL,VISION_BASE_URL,VISION_API_KEY,VISION_MODEL,TTS_BASE_URL,TTS_API_KEY,TTS_SPEECH_MODEL,MOCK_IMAGE&envDescription=Three%20required%20providers%20%2B%20optional%20TTS.%20Any%20OpenAI-compatible%20endpoint%20works%20for%20text%2Fvision.%20TTS%20uses%20MiMo%27s%20own%20protocol.&envLink=https://github.com/zonghaoyuan/infiplot/blob/main/README.ja.md%23%E8%A8%AD%E5%AE%9A%E3%82%AC%E3%82%A4%E3%83%89)   [![Deploy to Cloudflare](https://deploy.workers.cloudflare.com/button)](https://deploy.workers.cloudflare.com/?url=https://github.com/zonghaoyuan/infiplot/tree/main/apps/web)
 

README.md

@@ -39,7 +39,7 @@ InfiPlot是一款AI实时生成内容的互动剧情游戏，这里没有预设
 
 ## 一键部署
 
-InfiPlot 同时支持部署到 Vercel 与 Cloudflare Workers —— 任选其一即可。
+InfiPlot 同时支持部署到 Vercel 与 Cloudflare Workers。Cloudflare 部署因场景流水线需要更长 CPU 时间，需要 Workers Paid Plan；个人使用推荐用 Vercel 一键部署。
 
 [![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https://github.com/zonghaoyuan/infiplot&root-directory=apps/web&env=TEXT_BASE_URL,TEXT_API_KEY,TEXT_MODEL,IMAGE_BASE_URL,IMAGE_API_KEY,IMAGE_MODEL,VISION_BASE_URL,VISION_API_KEY,VISION_MODEL,TTS_BASE_URL,TTS_API_KEY,TTS_SPEECH_MODEL,MOCK_IMAGE&envDescription=Three%20required%20providers%20%2B%20optional%20TTS.%20Any%20OpenAI-compatible%20endpoint%20works%20for%20text%2Fvision.%20TTS%20uses%20MiMo%27s%20own%20protocol.&envLink=https://github.com/zonghaoyuan/infiplot%23%E9%85%8D%E7%BD%AE%E6%95%99%E7%A8%8B)   [![Deploy to Cloudflare](https://deploy.workers.cloudflare.com/button)](https://deploy.workers.cloudflare.com/?url=https://github.com/zonghaoyuan/infiplot/tree/main/apps/web)