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/camelcase/readme.md

@@ -0,0 +1,99 @@
+# camelcase [![Build Status](https://travis-ci.org/sindresorhus/camelcase.svg?branch=master)](https://travis-ci.org/sindresorhus/camelcase)
+
+> Convert a dash/dot/underscore/space separated string to camelCase or PascalCase: `foo-bar` → `fooBar`
+
+---
+
+<div align="center">
+	<b>
+		<a href="https://tidelift.com/subscription/pkg/npm-camelcase?utm_source=npm-camelcase&utm_medium=referral&utm_campaign=readme">Get professional support for 'camelcase' with a Tidelift subscription</a>
+	</b>
+	<br>
+	<sub>
+		Tidelift helps make open source sustainable for maintainers while giving companies<br>assurances about security, maintenance, and licensing for their dependencies.
+	</sub>
+</div>
+
+---
+
+## Install
+
+```
+$ npm install camelcase
+```
+
+
+## Usage
+
+```js
+const camelCase = require('camelcase');
+
+camelCase('foo-bar');
+//=> 'fooBar'
+
+camelCase('foo_bar');
+//=> 'fooBar'
+
+camelCase('Foo-Bar');
+//=> 'fooBar'
+
+camelCase('Foo-Bar', {pascalCase: true});
+//=> 'FooBar'
+
+camelCase('--foo.bar', {pascalCase: false});
+//=> 'fooBar'
+
+camelCase('foo bar');
+//=> 'fooBar'
+
+console.log(process.argv[3]);
+//=> '--foo-bar'
+camelCase(process.argv[3]);
+//=> 'fooBar'
+
+camelCase(['foo', 'bar']);
+//=> 'fooBar'
+
+camelCase(['__foo__', '--bar'], {pascalCase: true});
+//=> 'FooBar'
+```
+
+
+## API
+
+### camelCase(input, [options])
+
+#### input
+
+Type: `string` `string[]`
+
+String to convert to camel case.
+
+#### options
+
+Type: `Object`
+
+##### pascalCase
+
+Type: `boolean`<br>
+Default: `false`
+
+Uppercase the first character: `foo-bar` → `FooBar`
+
+
+## Security
+
+To report a security vulnerability, please use the [Tidelift security contact](https://tidelift.com/security). Tidelift will coordinate the fix and disclosure.
+
+
+## Related
+
+- [decamelize](https://github.com/sindresorhus/decamelize) - The inverse of this module
+- [uppercamelcase](https://github.com/SamVerschueren/uppercamelcase) - Like this module, but to PascalCase instead of camelCase
+- [titleize](https://github.com/sindresorhus/titleize) - Capitalize every word in string
+- [humanize-string](https://github.com/sindresorhus/humanize-string) - Convert a camelized/dasherized/underscored string into a humanized one
+
+
+## License
+
+MIT © [Sindre Sorhus](https://sindresorhus.com)