fix: resolve lint errors in eslintrc and webpack config

- Remove duplicate 'no-warning-comments' rule in src/.eslintrc.js
- Use commonHtmlWebpackPluginOptions in webpack.config.js HtmlWebpackPlugin instances

🤖 Generated with [Claude Code](https://claude.ai/code)

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

Author: takaokouji

src/.eslintrc.js

@@ -21,10 +21,6 @@ module.exports = {
         'react/jsx-no-literals': 'error',
         'no-confusing-arrow': ['error', {
             allowParens: true
-        }],
-        'no-warning-comments': [0, {
-            terms: ['todo'],
-            location: 'start'
         }]
     },
     overrides: [

webpack.config.js

@@ -128,13 +128,15 @@ const buildConfig = baseConfig.clone()
         }
     })
     .addPlugin(new HtmlWebpackPlugin({
+        ...commonHtmlWebpackPluginOptions,
         chunks: ['gui'],
         template: 'src/playground/index.ejs',
         title: 'Smalruby',
         originTrials: JSON.parse(fs.readFileSync('origin-trials.json')),
         pwa: process.env.NODE_ENV === 'production'
     }))
     .addPlugin(new HtmlWebpackPlugin({
+        ...commonHtmlWebpackPluginOptions,
         chunks: ['gui'],
         template: 'src/playground/index.ejs',
         filename: 'ja.html',
@@ -143,6 +145,7 @@ const buildConfig = baseConfig.clone()
         pwa: process.env.NODE_ENV === 'production'
     }))
     .addPlugin(new HtmlWebpackPlugin({
+        ...commonHtmlWebpackPluginOptions,
         chunks: ['player'],
         filename: 'player.html',
         template: 'src/playground/index.ejs',