Add Storybook addons (a11y, storysource) and Playwright MCP

- @storybook/addon-a11y: real-time axe-core accessibility panel per story
- @storybook/addon-storysource: story source code panel in addons bar
- @playwright/mcp: browser automation for visual screenshot feedback loop

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.storybook/main.ts

@@ -4,7 +4,16 @@ const config: StorybookConfig = {
   stories: ['../src/**/*.stories.@(ts|tsx)'],
   addons: [
     '@storybook/addon-essentials',
+    '@storybook/addon-a11y',
     '@storybook/addon-designs',
+    {
+      name: '@storybook/addon-storysource',
+      options: {
+        loaderOptions: {
+          injectStoryParameters: true,
+        },
+      },
+    },
   ],
   framework: {
     name: '@storybook/react-vite',

package-lock.json

@@ -18,8 +18,11 @@
       },
       "devDependencies": {
         "@eslint/js": "^9.39.4",
+        "@playwright/mcp": "^0.0.68",
+        "@storybook/addon-a11y": "^8.6.14",
         "@storybook/addon-designs": "^8.0.0",
         "@storybook/addon-essentials": "^8.4.0",
+        "@storybook/addon-storysource": "^8.6.14",
         "@storybook/blocks": "^8.4.0",
         "@storybook/react": "^8.4.0",
         "@storybook/react-vite": "^8.4.0",
@@ -2340,6 +2343,23 @@
         "node": ">=14"
       }
     },
+    "node_modules/@playwright/mcp": {
+      "version": "0.0.68",
+      "resolved": "https://registry.npmjs.org/@playwright/mcp/-/mcp-0.0.68.tgz",
+      "integrity": "sha512-oP9I9ghXKuQEBo4xaC7HgsS2gRTxyMzlBm3UEhYj4VqqrqbPQUX2shATPaNA/am9joBzq9v0OXISzeIgP+zmHA==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "playwright": "1.59.0-alpha-1771104257000",
+        "playwright-core": "1.59.0-alpha-1771104257000"
+      },
+      "bin": {
+        "playwright-mcp": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@popperjs/core": {
       "version": "2.11.8",
       "resolved": "https://registry.npmjs.org/@popperjs/core/-/core-2.11.8.tgz",
@@ -3049,6 +3069,26 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@storybook/addon-a11y": {
+      "version": "8.6.14",
+      "resolved": "https://registry.npmjs.org/@storybook/addon-a11y/-/addon-a11y-8.6.14.tgz",
+      "integrity": "sha512-fozv6enO9IgpWq2U8qqS8MZ21Nt+MVHiRQe3CjnCpBOejTyo/ATm690PeYYRVHVG6M/15TVePb0h3ngKQbrrzQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@storybook/addon-highlight": "8.6.14",
+        "@storybook/global": "^5.0.0",
+        "@storybook/test": "8.6.14",
+        "axe-core": "^4.2.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/storybook"
+      },
+      "peerDependencies": {
+        "storybook": "^8.6.14"
+      }
+    },
     "node_modules/@storybook/addon-actions": {
       "version": "8.6.14",
       "resolved": "https://registry.npmjs.org/@storybook/addon-actions/-/addon-actions-8.6.14.tgz",
@@ -3244,6 +3284,25 @@
         "storybook": "^8.6.14"
       }
     },
+    "node_modules/@storybook/addon-storysource": {
+      "version": "8.6.14",
+      "resolved": "https://registry.npmjs.org/@storybook/addon-storysource/-/addon-storysource-8.6.14.tgz",
+      "integrity": "sha512-/eDCNUHPdsVDF53B+Ebi9gHSNcRrA3puo1UCDio8wMN+jBMoWh6E5wSjXDsxWaOyp0Zwuq8XUx8AdgTlg/rcrw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@storybook/source-loader": "8.6.14",
+        "estraverse": "^5.2.0",
+        "tiny-invariant": "^1.3.1"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/storybook"
+      },
+      "peerDependencies": {
+        "storybook": "^8.6.14"
+      }
+    },
     "node_modules/@storybook/addon-toolbars": {
       "version": "8.6.14",
       "resolved": "https://registry.npmjs.org/@storybook/addon-toolbars/-/addon-toolbars-8.6.14.tgz",
@@ -3437,6 +3496,62 @@
         "react-dom": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0-beta"
       }
     },
+    "node_modules/@storybook/instrumenter": {
+      "version": "8.6.14",
+      "resolved": "https://registry.npmjs.org/@storybook/instrumenter/-/instrumenter-8.6.14.tgz",
+      "integrity": "sha512-iG4MlWCcz1L7Yu8AwgsnfVAmMbvyRSk700Mfy2g4c8y5O+Cv1ejshE1LBBsCwHgkuqU0H4R0qu4g23+6UnUemQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@storybook/global": "^5.0.0",
+        "@vitest/utils": "^2.1.1"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/storybook"
+      },
+      "peerDependencies": {
+        "storybook": "^8.6.14"
+      }
+    },
+    "node_modules/@storybook/instrumenter/node_modules/@vitest/pretty-format": {
+      "version": "2.1.9",
+      "resolved": "https://registry.npmjs.org/@vitest/pretty-format/-/pretty-format-2.1.9.tgz",
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+      "resolved": "https://registry.npmjs.org/@vitest/utils/-/utils-2.1.9.tgz",
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+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@vitest/pretty-format": "2.1.9",
+        "loupe": "^3.1.2",
+        "tinyrainbow": "^1.2.0"
+      },
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+      }
+    },
+    "node_modules/@storybook/instrumenter/node_modules/tinyrainbow": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/tinyrainbow/-/tinyrainbow-1.2.0.tgz",
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+      "dev": true,
+      "license": "MIT",
+      "engines": {
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     "node_modules/@storybook/manager-api": {
       "version": "8.6.18",
       "resolved": "https://registry.npmjs.org/@storybook/manager-api/-/manager-api-8.6.18.tgz",
@@ -3571,6 +3686,248 @@
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       }
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+    "node_modules/@storybook/source-loader": {
+      "version": "8.6.14",
+      "resolved": "https://registry.npmjs.org/@storybook/source-loader/-/source-loader-8.6.14.tgz",
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+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "es-toolkit": "^1.22.0",
+        "estraverse": "^5.2.0",
+        "prettier": "^3.1.1"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/storybook"
+      },
+      "peerDependencies": {
+        "storybook": "^8.6.14"
+      }
+    },
+    "node_modules/@storybook/test": {
+      "version": "8.6.14",
+      "resolved": "https://registry.npmjs.org/@storybook/test/-/test-8.6.14.tgz",
+      "integrity": "sha512-GkPNBbbZmz+XRdrhMtkxPotCLOQ1BaGNp/gFZYdGDk2KmUWBKmvc5JxxOhtoXM2703IzNFlQHSSNnhrDZYuLlw==",
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+      "dependencies": {
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+        "@storybook/instrumenter": "8.6.14",
+        "@testing-library/dom": "10.4.0",
+        "@testing-library/jest-dom": "6.5.0",
+        "@testing-library/user-event": "14.5.2",
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+        "@vitest/spy": "2.0.5"
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     "node_modules/@storybook/theming": {
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@@ -3585,38 +3942,6 @@
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-        "@babel/runtime": "^7.12.5",
-        "@types/aria-query": "^5.0.1",
-        "aria-query": "5.3.0",
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-        "lz-string": "^1.5.0",
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@@ -3672,6 +3997,20 @@
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       }
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+      "dev": true,
+      "license": "MIT",
+      "engines": {
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@@ -5565,6 +5923,17 @@
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@@ -8090,6 +8466,13 @@
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@@ -8826,6 +9208,16 @@
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@@ -8845,6 +9237,53 @@
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+    "node_modules/playwright": {
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+      "resolved": "https://registry.npmjs.org/playwright/-/playwright-1.59.0-alpha-1771104257000.tgz",
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@@ -10176,6 +10611,16 @@
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package.json

@@ -32,8 +32,11 @@
   },
   "devDependencies": {
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+    "@playwright/mcp": "^0.0.68",
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     "@storybook/addon-designs": "^8.0.0",
     "@storybook/addon-essentials": "^8.4.0",
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     "@storybook/blocks": "^8.4.0",
     "@storybook/react": "^8.4.0",
     "@storybook/react-vite": "^8.4.0",