Load Monaco from CDN (#1939)

<!-- CURSOR_SUMMARY -->
> [!NOTE]
> Load Monaco via @monaco-editor/react loader, drop custom workers, and
initialize themes/TypeScript after loader init.
> 
> - **Editor/Monaco**:
> - Switch to `@monaco-editor/react` `loader.init()` with type-only
`editor` import.
> - Remove worker imports and `MonacoEnvironment.getWorker`
configuration.
> - Move theme registration (`dyad-light`, `dyad-dark`) and TypeScript
compiler/diagnostics setup into the loader init callback.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
c4b7c025725273068463feac3fbdb7b61125fc10. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->



<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Load Monaco from a CDN via @monaco-editor/react and initialize
themes/TypeScript settings after loader init. This reduces bundle size
and removes custom worker setup.

- **Refactors**
  - Removed web worker imports and MonacoEnvironment configuration.
- Switched from direct monaco import to type-only import; initialization
now uses loader.init().
- Moved theme registration (dyad-light/dark) and TS compiler/diagnostics
setup into the loader init callback.

<sup>Written for commit c4b7c025725273068463feac3fbdb7b61125fc10.
Summary will update automatically on new commits.</sup>

<!-- End of auto-generated description by cubic. -->

src/components/chat/monaco.ts

@@ -1,40 +1,6 @@
-import { editor } from "monaco-editor";
-
+import type { editor } from "monaco-editor";
 import { loader } from "@monaco-editor/react";
 
-import * as monaco from "monaco-editor";
-// @ts-ignore
-import editorWorker from "monaco-editor/esm/vs/editor/editor.worker?worker";
-// @ts-ignore
-import jsonWorker from "monaco-editor/esm/vs/language/json/json.worker?worker";
-// @ts-ignore
-import cssWorker from "monaco-editor/esm/vs/language/css/css.worker?worker";
-// @ts-ignore
-import htmlWorker from "monaco-editor/esm/vs/language/html/html.worker?worker";
-// @ts-ignore
-import tsWorker from "monaco-editor/esm/vs/language/typescript/ts.worker?worker";
-
-self.MonacoEnvironment = {
-  getWorker(_, label) {
-    if (label === "json") {
-      return new jsonWorker();
-    }
-    if (label === "css" || label === "scss" || label === "less") {
-      return new cssWorker();
-    }
-    if (label === "html" || label === "handlebars" || label === "razor") {
-      return new htmlWorker();
-    }
-    if (label === "typescript" || label === "javascript") {
-      return new tsWorker();
-    }
-    return new editorWorker();
-  },
-};
-
-loader.config({ monaco });
-
-// loader.init().then(/* ... */);
 export const customLight: editor.IStandaloneThemeData = {
   base: "vs",
   inherit: false,
@@ -106,8 +72,6 @@ export const customLight: editor.IStandaloneThemeData = {
   },
 };
 
-editor.defineTheme("dyad-light", customLight);
-
 export const customDark: editor.IStandaloneThemeData = {
   base: "vs-dark",
   inherit: false,
@@ -178,7 +142,9 @@ export const customDark: editor.IStandaloneThemeData = {
   },
 };
 
-editor.defineTheme("dyad-dark", customDark);
+loader.init().then((monaco) => {
+  monaco.editor.defineTheme("dyad-light", customLight);
+  monaco.editor.defineTheme("dyad-dark", customDark);
 
   monaco.languages.typescript.typescriptDefaults.setCompilerOptions({
     jsx: monaco.languages.typescript.JsxEmit.React, // Enable JSX
@@ -187,3 +153,4 @@ monaco.languages.typescript.typescriptDefaults.setDiagnosticsOptions({
     // Too noisy because we don't have the full TS environment.
     noSemanticValidation: true,
   });
+});