docs: bundle mermaid locally for offline diagram rendering

docs/.vitepress/theme/index.ts

@@ -1,16 +1,14 @@
 import DefaultTheme from 'vitepress/theme';
 import { useRoute } from 'vitepress';
 import { nextTick, onMounted, watch } from 'vue';
+import mermaid from 'mermaid';
 import '@catppuccin/vitepress/theme/macchiato/mauve.css';
 
 let mermaidLoader: Promise<any> | null = null;
 
 async function getMermaid() {
   if (!mermaidLoader) {
-    mermaidLoader = import(
-      /* @vite-ignore */ 'https://cdn.jsdelivr.net/npm/mermaid@11/dist/mermaid.esm.min.mjs'
-    ).then((mod) => {
-      const mermaid = mod.default ?? mod;
+    mermaidLoader = Promise.resolve().then(() => {
       mermaid.initialize({
         startOnLoad: false,
         securityLevel: 'loose',

package.json

@@ -41,10 +41,11 @@
   "author": "",
   "license": "GPL-3.0-or-later",
   "dependencies": {
+    "@catppuccin/vitepress": "^0.1.2",
     "axios": "^1.13.5",
     "jsonc-parser": "^3.3.1",
-    "ws": "^8.19.0",
-    "@catppuccin/vitepress": "^0.1.2"
+    "mermaid": "^11.12.2",
+    "ws": "^8.19.0"
   },
   "devDependencies": {
     "@types/node": "^25.2.2",