fix(ui): generate Monaco public assets in dev

packages/ui/vite.config.ts

@@ -7,83 +7,93 @@ import { resolve } from "path"
 const uiPackageJson = JSON.parse(fs.readFileSync(resolve(__dirname, "package.json"), "utf-8")) as { version?: string }
 const uiVersion = uiPackageJson.version ?? "0.0.0"
 
+function copyMonacoPublicAssets(opts: { warn: (message: string) => void }) {
+  const publicDir = resolve(__dirname, "src/renderer/public")
+  const destRoot = resolve(publicDir, "monaco/vs")
+
+  const candidates = [
+    resolve(__dirname, "../../node_modules/monaco-editor/min/vs"),
+    resolve(__dirname, "node_modules/monaco-editor/min/vs"),
+  ]
+  const sourceRoot = candidates.find((p) => fs.existsSync(resolve(p, "loader.js")))
+  if (!sourceRoot) {
+    opts.warn("Monaco source directory not found; skipping copy")
+    return
+  }
+
+  fs.mkdirSync(destRoot, { recursive: true })
+
+  const copyRecursive = (src: string, dest: string) => {
+    const stat = fs.statSync(src)
+    if (stat.isDirectory()) {
+      fs.mkdirSync(dest, { recursive: true })
+      for (const entry of fs.readdirSync(src)) {
+        copyRecursive(resolve(src, entry), resolve(dest, entry))
+      }
+      return
+    }
+    fs.copyFileSync(src, dest)
+  }
+
+  // Keep the working tree clean; these assets are generated.
+  try {
+    fs.rmSync(destRoot, { recursive: true, force: true })
+  } catch {
+    // ignore
+  }
+  fs.mkdirSync(destRoot, { recursive: true })
+
+  // Copy core Monaco runtime.
+  for (const dir of ["base", "editor", "platform"] as const) {
+    const src = resolve(sourceRoot, dir)
+    if (fs.existsSync(src)) {
+      copyRecursive(src, resolve(destRoot, dir))
+    }
+  }
+
+  // loader.js is required.
+  copyRecursive(resolve(sourceRoot, "loader.js"), resolve(destRoot, "loader.js"))
+
+  // Copy baseline rich language packages + workers.
+  for (const lang of ["typescript", "html", "json", "css"] as const) {
+    const src = resolve(sourceRoot, "language", lang)
+    if (fs.existsSync(src)) {
+      copyRecursive(src, resolve(destRoot, "language", lang))
+    }
+  }
+
+  // Copy baseline basic tokenizers.
+  for (const lang of ["python", "markdown", "cpp", "kotlin"] as const) {
+    const src = resolve(sourceRoot, "basic-languages", lang)
+    if (fs.existsSync(src)) {
+      copyRecursive(src, resolve(destRoot, "basic-languages", lang))
+    }
+  }
+
+  // Copy monaco.contribution.js entrypoints (needed by some loads).
+  const monacoContribution = resolve(sourceRoot, "basic-languages", "monaco.contribution.js")
+  if (fs.existsSync(monacoContribution)) {
+    copyRecursive(monacoContribution, resolve(destRoot, "basic-languages", "monaco.contribution.js"))
+  }
+  const underscoreContribution = resolve(sourceRoot, "basic-languages", "_.contribution.js")
+  if (fs.existsSync(underscoreContribution)) {
+    copyRecursive(underscoreContribution, resolve(destRoot, "basic-languages", "_.contribution.js"))
+  }
+}
+
 export default defineConfig({
   root: "./src/renderer",
   plugins: [
     solid(),
     {
       name: "prepare-monaco-public-assets",
+      // Ensure Monaco's AMD assets exist in `root/public` for both dev server and builds.
+      // These files are gitignored and generated on demand.
+      configureServer(server) {
+        copyMonacoPublicAssets({ warn: (msg) => server.config.logger.warn(msg) })
+      },
       buildStart() {
-        const publicDir = resolve(__dirname, "src/renderer/public")
-        const destRoot = resolve(publicDir, "monaco/vs")
-
-        const candidates = [
-          resolve(__dirname, "../../node_modules/monaco-editor/min/vs"),
-          resolve(__dirname, "node_modules/monaco-editor/min/vs"),
-        ]
-        const sourceRoot = candidates.find((p) => fs.existsSync(resolve(p, "loader.js")))
-        if (!sourceRoot) {
-          this.warn("Monaco source directory not found; skipping copy")
-          return
-        }
-
-        fs.mkdirSync(destRoot, { recursive: true })
-
-        const copyRecursive = (src: string, dest: string) => {
-          const stat = fs.statSync(src)
-          if (stat.isDirectory()) {
-            fs.mkdirSync(dest, { recursive: true })
-            for (const entry of fs.readdirSync(src)) {
-              copyRecursive(resolve(src, entry), resolve(dest, entry))
-            }
-            return
-          }
-          fs.copyFileSync(src, dest)
-        }
-
-        // Keep the working tree clean; these assets are generated.
-        try {
-          fs.rmSync(destRoot, { recursive: true, force: true })
-        } catch {
-          // ignore
-        }
-        fs.mkdirSync(destRoot, { recursive: true })
-
-        // Copy core Monaco runtime.
-        for (const dir of ["base", "editor", "platform"] as const) {
-          const src = resolve(sourceRoot, dir)
-          if (fs.existsSync(src)) {
-            copyRecursive(src, resolve(destRoot, dir))
-          }
-        }
-        // loader.js is required.
-        copyRecursive(resolve(sourceRoot, "loader.js"), resolve(destRoot, "loader.js"))
-
-        // Copy baseline rich language packages + workers.
-        for (const lang of ["typescript", "html", "json", "css"] as const) {
-          const src = resolve(sourceRoot, "language", lang)
-          if (fs.existsSync(src)) {
-            copyRecursive(src, resolve(destRoot, "language", lang))
-          }
-        }
-
-        // Copy baseline basic tokenizers.
-        for (const lang of ["python", "markdown", "cpp", "kotlin"] as const) {
-          const src = resolve(sourceRoot, "basic-languages", lang)
-          if (fs.existsSync(src)) {
-            copyRecursive(src, resolve(destRoot, "basic-languages", lang))
-          }
-        }
-
-        // Copy monaco.contribution.js entrypoints (needed by some loads).
-        const monacoContribution = resolve(sourceRoot, "basic-languages", "monaco.contribution.js")
-        if (fs.existsSync(monacoContribution)) {
-          copyRecursive(monacoContribution, resolve(destRoot, "basic-languages", "monaco.contribution.js"))
-        }
-        const underscoreContribution = resolve(sourceRoot, "basic-languages", "_.contribution.js")
-        if (fs.existsSync(underscoreContribution)) {
-          copyRecursive(underscoreContribution, resolve(destRoot, "basic-languages", "_.contribution.js"))
-        }
+        copyMonacoPublicAssets({ warn: (msg) => this.warn(msg) })
       },
     },
     {