fix: resolve Prism CJS loading crash in Vite dev mode

Remove the prismSetup module that imported prismjs directly — it
caused Vite to pre-bundle prismjs into a separate chunk from
@lexical/code-prism, breaking the CJS require chain.  Language
components tried to call Prism.languages.extend() before the base
grammars were available, crashing the app.

Instead, add optimizeDeps.include for prismjs and @lexical/code-prism
so Vite pre-bundles them together, preserving the correct CJS
evaluation order within a single chunk.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

electron.vite.config.ts

@@ -33,6 +33,12 @@ export default defineConfig({
     build: {
       outDir: 'dist/renderer',
     },
+    optimizeDeps: {
+      // @lexical/code-prism depends on prismjs + its language components via
+      // CJS require().  Vite must pre-bundle them together so that the Prism
+      // global is available when component IIFEs execute.
+      include: ['prismjs', '@lexical/code-prism'],
+    },
     plugins: [react(), tailwindcss()],
     resolve: {
       alias: {

src/renderer/lib/prismSetup.ts

@@ -1,15 +0,0 @@
-/**
- * Ensures the PrismJS global is available before @lexical/code-prism
- * captures its tokenizer reference.
- *
- * @lexical/code-prism reads `globalThis.Prism` at module-evaluation time.
- * In Vite dev mode the esbuild CJS shim may not have set the global yet,
- * so we force it here.  This module must be imported before any module
- * that transitively loads @lexical/code-prism.
- */
-import Prism from 'prismjs';
-
-if (typeof globalThis !== 'undefined' && !globalThis.Prism) {
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  (globalThis as any).Prism = Prism;
-}

src/renderer/main.tsx

@@ -1,7 +1,6 @@
 import { StrictMode } from 'react';
 import { createRoot } from 'react-dom/client';
 
-import '@renderer/lib/prismSetup';
 import App from '@renderer/App';
 import '@renderer/styles.css';