feat(plugin-vite): make hot restart opt-in via plugin config

Add `hotRestart` option to VitePluginConfig (default: false).
The main process restart is now only enabled when explicitly configured.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: bglgwyng

packages/plugin/vite/src/Config.ts

@@ -49,4 +49,10 @@ export interface VitePluginConfig {
    * @defaultValue `true`
    */
   concurrent?: boolean | number;
+
+  /**
+   * Enable hot restart for the main process when its bundle is rebuilt.
+   * @defaultValue false
+   */
+  hotRestart?: boolean;
 }

packages/plugin/vite/src/config/vite.main.config.ts

@@ -20,7 +20,9 @@ export function getConfig(
         external: [...external, 'electron/main'],
       },
     },
-    plugins: [pluginHotRestart('restart')],
+    plugins: [
+      ...(forgeEnv.forgeConfig.hotRestart ? [pluginHotRestart('restart')] : []),
+    ],
     define,
     resolve: {
       // Load the Node.js entry.