feat(security,ui): self-host React deps, Tailwind, fonts; strict CSP; local QR; better selection state

Replace CDN React/ReactDOM/Babel with local libs; remove Babel and inline scripts
Build Tailwind locally, add safelist; switch to assets/tailwind.css
Self-host Font Awesome and Inter (CSS + woff2); remove external font CDNs
Implement strict CSP (no unsafe-inline/eval; scripts/styles/fonts from self)
Extract inline handlers; move PWA scripts to external files
Add local QR code generation (qrcode lib) and remove api.qrserver.com
Improve SessionTypeSelector visual selection (highlighted background and ring)
Keep PWA working with service worker and offline assets
Refs: CSP hardening, offline-first, no external dependencies

node_modules/locate-path/readme.md

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+# locate-path [![Build Status](https://travis-ci.org/sindresorhus/locate-path.svg?branch=master)](https://travis-ci.org/sindresorhus/locate-path)
+
+> Get the first path that exists on disk of multiple paths
+
+
+## Install
+
+```
+$ npm install locate-path
+```
+
+
+## Usage
+
+Here we find the first file that exists on disk, in array order.
+
+```js
+const locatePath = require('locate-path');
+
+const files = [
+	'unicorn.png',
+	'rainbow.png', // Only this one actually exists on disk
+	'pony.png'
+];
+
+(async () => {
+	console(await locatePath(files));
+	//=> 'rainbow'
+})();
+```
+
+
+## API
+
+### locatePath(paths, [options])
+
+Returns a `Promise<string>` for the first path that exists or `undefined` if none exists.
+
+#### paths
+
+Type: `Iterable<string>`
+
+Paths to check.
+
+#### options
+
+Type: `Object`
+
+##### concurrency
+
+Type: `number`<br>
+Default: `Infinity`<br>
+Minimum: `1`
+
+Number of concurrently pending promises.
+
+##### preserveOrder
+
+Type: `boolean`<br>
+Default: `true`
+
+Preserve `paths` order when searching.
+
+Disable this to improve performance if you don't care about the order.
+
+##### cwd
+
+Type: `string`<br>
+Default: `process.cwd()`
+
+Current working directory.
+
+##### type
+
+Type: `string`<br>
+Default: `file`<br>
+Values: `file` `directory`
+
+The type of paths that can match.
+
+##### allowSymlinks
+
+Type: `boolean`<br>
+Default: `true`
+
+Allow symbolic links to match if they point to the chosen path type.
+
+### locatePath.sync(paths, [options])
+
+Returns the first path that exists or `undefined` if none exists.
+
+#### paths
+
+Type: `Iterable<string>`
+
+Paths to check.
+
+#### options
+
+Type: `Object`
+
+##### cwd
+
+Same as above.
+
+##### type
+
+Same as above.
+
+##### allowSymlinks
+
+Same as above.
+
+
+## Related
+
+- [path-exists](https://github.com/sindresorhus/path-exists) - Check if a path exists
+
+
+## License
+
+MIT © [Sindre Sorhus](https://sindresorhus.com)