feat: replace all mermaid diagrams with drawio-style SVGs in gen2D deck

decks/gen2D/pages/deployment.md

@@ -2,16 +2,9 @@
 
 Docker Compose 双容器 + 一键部署
 
-```mermaid {scale: 0.7}
-graph TB
-    subgraph Docker Compose
-        A[nginx 容器] -->|proxy_pass| B[app 容器]
-    end
-    B --> C[七牛云 Kodo]
-    B --> D[DeepSeek LLM]
-    B --> E[Stability AI]
-    User -->|HTTP| A
-```
+<div class="flex justify-center">
+  <img src="/deployment.svg" class="w-full max-h-[300px] object-contain" />
+</div>
 
 <Item title="🐳 容器化方案">
 nginx 容器：Vite 构建产物 + 反向代理 `/api`。app 容器：Go 二进制 + SQLite 挂载。内部网络通信，nginx 暴露 8080 端口。