🧪 Verify Storybook 10 local TDD compatibility (#249)

## Why
The Storybook SDK needed a real end-to-end verification pass against the
latest stable Storybook release and the actual local TDD workflow, not
just isolated package tests.

## What changed
- upgraded the bundled example Storybook app to Storybook 10.3.6
- documented Storybook 10 compatibility requirements in the Storybook
SDK README
- fixed local TDD metadata sanitization so Storybook iframe URLs keep
`&viewMode=story`
- hardened the context review-queue test to avoid local `.vizzly` state
leaking into cloud-path assertions
- cleaned up a couple of Storybook SDK Playwright references in
comments/docs

## Test plan
- `npm run lint`
- `npm test`
- `cd clients/storybook && npm test`
- `cd clients/storybook && npm run build`
- `cd clients/storybook/example-storybook && npm run build-storybook`
- `cd clients/storybook && node ../../bin/vizzly.js tdd start --json`
- `cd clients/storybook && node ../../bin/vizzly.js storybook
./example-storybook/dist`
- `cd clients/storybook && node ../../bin/vizzly.js tdd stop --json`

Author: Robdel12

clients/storybook/README.md

@@ -12,6 +12,18 @@ npm install @vizzly-testing/storybook
 
 The plugin is automatically discovered by the Vizzly CLI via the `@vizzly-testing/*` scope.
 
+## Storybook 10 Compatibility
+
+The plugin works with the current stable Storybook 10 release. If you're upgrading an existing
+Storybook app to the latest major, keep these Storybook 10 requirements in mind:
+
+- `.storybook/main.js|ts` and related presets must be valid ESM
+- Storybook 10 requires Node `20.19+` or `22.12+`
+- `@storybook/addon-essentials` is zero-config in Storybook 10, so many apps no longer need to
+  list it explicitly in `addons`
+
+Storybook's official migration guide: https://storybook.js.org/docs/releases/migration-guide
+
 ## Quick Start
 
 ### CLI Usage
@@ -137,7 +149,7 @@ Configuration is merged in this order (later overrides earlier):
 - `--include <pattern>` - Include story pattern (glob)
 - `--exclude <pattern>` - Exclude story pattern (glob)
 - `--config <path>` - Path to custom config file
-- `--browser-args <args>` - Additional Puppeteer browser arguments
+- `--browser-args <args>` - Additional Playwright browser arguments
 - `--headless` - Run browser in headless mode (default: true)
 - `--full-page` - Capture full page screenshots (default: true)
 - `--no-full-page` - Capture viewport-only screenshots

clients/storybook/example-storybook/.storybook/main.js

@@ -1,6 +1,6 @@
 export default {
   stories: ['../src/**/*.stories.@(js|jsx|ts|tsx)'],
-  addons: ['@storybook/addon-essentials'],
+  addons: [],
   framework: {
     name: '@storybook/react-vite',
     options: {},