refactor: replace SWC with rolldown built-in minification and CJS interop

Rolldown natively handles TypeScript transpilation, minification, and
CJS-to-ESM interop, making the rollup-plugin-swc3 dependency and the
eventemitter3 alias unnecessary in the rolldown config.

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

Author: lukecotter

rolldown.config.ts

@@ -6,28 +6,13 @@ import nodePolyfills from '@rolldown/plugin-node-polyfills';
 // rollup plugins
 import copy from 'rollup-plugin-copy';
 import postcss from 'rollup-plugin-postcss';
-import { defineRollupSwcOption, swc } from 'rollup-plugin-swc3';
 
 import path from 'path';
 import { fileURLToPath } from 'url';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
 
-const getSwcOptions = (dirPath: string) =>
-  defineRollupSwcOption({
-    include: /\.[mc]?[jt]sx?$/,
-    exclude: 'node_modules',
-    tsconfig: production ? `${dirPath}/tsconfig.json` : `${dirPath}/tsconfig-dev.json`,
-    jsc: {
-      transform: { useDefineForClassFields: false },
-      minify: {
-        compress: production ? { keep_classnames: true, keep_fnames: true } : false,
-        mangle: production ? { keep_classnames: true } : false,
-      },
-    },
-  });
-
 /**
  * Workaround for oxc printer lone-surrogate bug (https://github.com/oxc-project/oxc/issues/3526).
  * The oxc codegen replaces lone surrogates (0xD800-0xDFFF) with U+FFFD in long CJS strings,
@@ -66,6 +51,7 @@ export default defineConfig([
       chunkFileNames: 'lana-[name].js',
       sourcemap: false,
       keepNames: true,
+      minify: production,
     },
     tsconfig: production ? './lana/tsconfig.json' : './lana/tsconfig-dev.json',
     platform: 'node',
@@ -76,7 +62,7 @@ export default defineConfig([
     },
 
     external: ['vscode'],
-    plugins: [preserveAntlrATN(), swc(getSwcOptions('./lana'))],
+    plugins: [preserveAntlrATN()],
   },
   {
     input: { bundle: './log-viewer/src/Main.ts' },
@@ -87,6 +73,7 @@ export default defineConfig([
         chunkFileNames: 'log-viewer-[name].js',
         sourcemap: false,
         keepNames: true,
+        minify: production,
       },
     ],
     platform: 'browser',
@@ -103,7 +90,6 @@ export default defineConfig([
         extensions: ['.css', '.scss'],
         minimize: true,
       }),
-      swc(getSwcOptions('./log-viewer')),
       copy({
         hook: 'closeBundle',
         targets: [