feat: v2 hardening — event validation fix, DX warnings, playground & tooling

.gitignore

@@ -29,4 +29,9 @@ docs
 storybook-static
 
 # Claude Code
-.claude/settings.local.json
+.claude/settings.local.json
+.playwright-mcp/
+tests/
+
+# Local test reports (not tracked — results live in PLAYWRIGHT_TEST_PLAN.md)
+TEST_REPORT.md

.storybook/preview.ts

@@ -1,6 +1,9 @@
 import type { Preview } from "@storybook/react-vite";
 
 const preview: Preview = {
+  args: {
+    colorScheme: "light",
+  },
   parameters: {
     controls: {
       matchers: {

eslint.config.js

@@ -6,9 +6,9 @@ import tseslint from 'typescript-eslint'
 import eslintConfigPrettier from 'eslint-config-prettier'
 
 export default tseslint.config(
-  { ignores: ['dist', 'node_modules', 'playground', 'storybook-static', 'src/stories'] },
+  { ignores: ['dist', 'node_modules', 'playground', 'storybook-static', 'src/stories', '.storybook', 'eslint.config.js', 'vite.config.ts'] },
   js.configs.recommended,
-  ...tseslint.configs.recommended,
+  ...tseslint.configs.recommendedTypeChecked,
   {
     files: ['**/*.{js,jsx,ts,tsx}'],
     plugins: {
@@ -26,6 +26,10 @@ export default tseslint.config(
         ...globals.browser,
         ...globals.node,
       },
+      parserOptions: {
+        project: true,
+        tsconfigRootDir: import.meta.dirname,
+      },
     },
     rules: {
       ...reactPlugin.configs.recommended.rules,
@@ -39,5 +43,11 @@ export default tseslint.config(
       'react-hooks/refs': 'warn',
     },
   },
+  {
+    files: ['**/*.test.ts', '**/*.test.tsx'],
+    rules: {
+      '@typescript-eslint/unbound-method': 'off',
+    },
+  },
   eslintConfigPrettier,
 )