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/y18n/CHANGELOG.md

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+# Change Log
+
+All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
+
+
+### [4.0.3](https://www.github.com/yargs/y18n/compare/y18n-v4.0.2...y18n-v4.0.3) (2021-04-07)
+
+
+### Bug Fixes
+
+* **release:** 4.x.x should not enforce Node 10 ([#126](https://www.github.com/yargs/y18n/issues/126)) ([1e21a53](https://www.github.com/yargs/y18n/commit/1e21a536e9135d8403a47be88922157a706b7cde))
+
+### 4.0.1 (2020-11-30)
+
+### Bug Fixes
+
+* address prototype pollution issue ([#108](https://www.github.com/yargs/y18n/issues/108)) ([a9ac604](https://www.github.com/yargs/y18n/commit/a9ac604abf756dec9687be3843e2c93bfe581f25))
+
+<a name="4.0.0"></a>
+# [4.0.0](https://github.com/yargs/y18n/compare/v3.2.1...v4.0.0) (2017-10-10)
+
+
+### Bug Fixes
+
+* allow support for falsy values like 0 in tagged literal ([#45](https://github.com/yargs/y18n/issues/45)) ([c926123](https://github.com/yargs/y18n/commit/c926123))
+
+
+### Features
+
+* **__:** added tagged template literal support ([#44](https://github.com/yargs/y18n/issues/44)) ([0598daf](https://github.com/yargs/y18n/commit/0598daf))
+
+
+### BREAKING CHANGES
+
+* **__:** dropping Node 0.10/Node 0.12 support

node_modules/y18n/LICENSE

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+Copyright (c) 2015, Contributors
+
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted, provided that the above copyright notice
+and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.

node_modules/y18n/README.md

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+# y18n
+
+[![Build Status][travis-image]][travis-url]
+[![Coverage Status][coveralls-image]][coveralls-url]
+[![NPM version][npm-image]][npm-url]
+[![js-standard-style][standard-image]][standard-url]
+[![Conventional Commits](https://img.shields.io/badge/Conventional%20Commits-1.0.0-yellow.svg)](https://conventionalcommits.org)
+
+The bare-bones internationalization library used by yargs.
+
+Inspired by [i18n](https://www.npmjs.com/package/i18n).
+
+## Examples
+
+_simple string translation:_
+
+```js
+var __ = require('y18n').__
+
+console.log(__('my awesome string %s', 'foo'))
+```
+
+output:
+
+`my awesome string foo`
+
+_using tagged template literals_
+
+```js
+var __ = require('y18n').__
+var str = 'foo'
+
+console.log(__`my awesome string ${str}`)
+```
+
+output:
+
+`my awesome string foo`
+
+_pluralization support:_
+
+```js
+var __n = require('y18n').__n
+
+console.log(__n('one fish %s', '%d fishes %s', 2, 'foo'))
+```
+
+output:
+
+`2 fishes foo`
+
+## JSON Language Files
+
+The JSON language files should be stored in a `./locales` folder.
+File names correspond to locales, e.g., `en.json`, `pirate.json`.
+
+When strings are observed for the first time they will be
+added to the JSON file corresponding to the current locale.
+
+## Methods
+
+### require('y18n')(config)
+
+Create an instance of y18n with the config provided, options include:
+
+* `directory`: the locale directory, default `./locales`.
+* `updateFiles`: should newly observed strings be updated in file, default `true`.
+* `locale`: what locale should be used.
+* `fallbackToLanguage`: should fallback to a language-only file (e.g. `en.json`)
+  be allowed if a file matching the locale does not exist (e.g. `en_US.json`),
+  default `true`.
+
+### y18n.\_\_(str, arg, arg, arg)
+
+Print a localized string, `%s` will be replaced with `arg`s.
+
+This function can also be used as a tag for a template literal. You can use it
+like this: <code>__&#96;hello ${'world'}&#96;</code>. This will be equivalent to
+`__('hello %s', 'world')`.
+
+### y18n.\_\_n(singularString, pluralString, count, arg, arg, arg)
+
+Print a localized string with appropriate pluralization. If `%d` is provided
+in the string, the `count` will replace this placeholder.
+
+### y18n.setLocale(str)
+
+Set the current locale being used.
+
+### y18n.getLocale()
+
+What locale is currently being used?
+
+### y18n.updateLocale(obj)
+
+Update the current locale with the key value pairs in `obj`.
+
+## License
+
+ISC
+
+[travis-url]: https://travis-ci.org/yargs/y18n
+[travis-image]: https://img.shields.io/travis/yargs/y18n.svg
+[coveralls-url]: https://coveralls.io/github/yargs/y18n
+[coveralls-image]: https://img.shields.io/coveralls/yargs/y18n.svg
+[npm-url]: https://npmjs.org/package/y18n
+[npm-image]: https://img.shields.io/npm/v/y18n.svg
+[standard-image]: https://img.shields.io/badge/code%20style-standard-brightgreen.svg
+[standard-url]: https://github.com/feross/standard

node_modules/y18n/index.js

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+var fs = require('fs')
+var path = require('path')
+var util = require('util')
+
+function Y18N (opts) {
+  // configurable options.
+  opts = opts || {}
+  this.directory = opts.directory || './locales'
+  this.updateFiles = typeof opts.updateFiles === 'boolean' ? opts.updateFiles : true
+  this.locale = opts.locale || 'en'
+  this.fallbackToLanguage = typeof opts.fallbackToLanguage === 'boolean' ? opts.fallbackToLanguage : true
+
+  // internal stuff.
+  this.cache = Object.create(null)
+  this.writeQueue = []
+}
+
+Y18N.prototype.__ = function () {
+  if (typeof arguments[0] !== 'string') {
+    return this._taggedLiteral.apply(this, arguments)
+  }
+  var args = Array.prototype.slice.call(arguments)
+  var str = args.shift()
+  var cb = function () {} // start with noop.
+
+  if (typeof args[args.length - 1] === 'function') cb = args.pop()
+  cb = cb || function () {} // noop.
+
+  if (!this.cache[this.locale]) this._readLocaleFile()
+
+  // we've observed a new string, update the language file.
+  if (!this.cache[this.locale][str] && this.updateFiles) {
+    this.cache[this.locale][str] = str
+
+    // include the current directory and locale,
+    // since these values could change before the
+    // write is performed.
+    this._enqueueWrite([this.directory, this.locale, cb])
+  } else {
+    cb()
+  }
+
+  return util.format.apply(util, [this.cache[this.locale][str] || str].concat(args))
+}
+
+Y18N.prototype._taggedLiteral = function (parts) {
+  var args = arguments
+  var str = ''
+  parts.forEach(function (part, i) {
+    var arg = args[i + 1]
+    str += part
+    if (typeof arg !== 'undefined') {
+      str += '%s'
+    }
+  })
+  return this.__.apply(null, [str].concat([].slice.call(arguments, 1)))
+}
+
+Y18N.prototype._enqueueWrite = function (work) {
+  this.writeQueue.push(work)
+  if (this.writeQueue.length === 1) this._processWriteQueue()
+}
+
+Y18N.prototype._processWriteQueue = function () {
+  var _this = this
+  var work = this.writeQueue[0]
+
+  // destructure the enqueued work.
+  var directory = work[0]
+  var locale = work[1]
+  var cb = work[2]
+
+  var languageFile = this._resolveLocaleFile(directory, locale)
+  var serializedLocale = JSON.stringify(this.cache[locale], null, 2)
+
+  fs.writeFile(languageFile, serializedLocale, 'utf-8', function (err) {
+    _this.writeQueue.shift()
+    if (_this.writeQueue.length > 0) _this._processWriteQueue()
+    cb(err)
+  })
+}
+
+Y18N.prototype._readLocaleFile = function () {
+  var localeLookup = {}
+  var languageFile = this._resolveLocaleFile(this.directory, this.locale)
+
+  try {
+    localeLookup = JSON.parse(fs.readFileSync(languageFile, 'utf-8'))
+  } catch (err) {
+    if (err instanceof SyntaxError) {
+      err.message = 'syntax error in ' + languageFile
+    }
+
+    if (err.code === 'ENOENT') localeLookup = {}
+    else throw err
+  }
+
+  this.cache[this.locale] = localeLookup
+}
+
+Y18N.prototype._resolveLocaleFile = function (directory, locale) {
+  var file = path.resolve(directory, './', locale + '.json')
+  if (this.fallbackToLanguage && !this._fileExistsSync(file) && ~locale.lastIndexOf('_')) {
+    // attempt fallback to language only
+    var languageFile = path.resolve(directory, './', locale.split('_')[0] + '.json')
+    if (this._fileExistsSync(languageFile)) file = languageFile
+  }
+  return file
+}
+
+// this only exists because fs.existsSync() "will be deprecated"
+// see https://nodejs.org/api/fs.html#fs_fs_existssync_path
+Y18N.prototype._fileExistsSync = function (file) {
+  try {
+    return fs.statSync(file).isFile()
+  } catch (err) {
+    return false
+  }
+}
+
+Y18N.prototype.__n = function () {
+  var args = Array.prototype.slice.call(arguments)
+  var singular = args.shift()
+  var plural = args.shift()
+  var quantity = args.shift()
+
+  var cb = function () {} // start with noop.
+  if (typeof args[args.length - 1] === 'function') cb = args.pop()
+
+  if (!this.cache[this.locale]) this._readLocaleFile()
+
+  var str = quantity === 1 ? singular : plural
+  if (this.cache[this.locale][singular]) {
+    str = this.cache[this.locale][singular][quantity === 1 ? 'one' : 'other']
+  }
+
+  // we've observed a new string, update the language file.
+  if (!this.cache[this.locale][singular] && this.updateFiles) {
+    this.cache[this.locale][singular] = {
+      one: singular,
+      other: plural
+    }
+
+    // include the current directory and locale,
+    // since these values could change before the
+    // write is performed.
+    this._enqueueWrite([this.directory, this.locale, cb])
+  } else {
+    cb()
+  }
+
+  // if a %d placeholder is provided, add quantity
+  // to the arguments expanded by util.format.
+  var values = [str]
+  if (~str.indexOf('%d')) values.push(quantity)
+
+  return util.format.apply(util, values.concat(args))
+}
+
+Y18N.prototype.setLocale = function (locale) {
+  this.locale = locale
+}
+
+Y18N.prototype.getLocale = function () {
+  return this.locale
+}
+
+Y18N.prototype.updateLocale = function (obj) {
+  if (!this.cache[this.locale]) this._readLocaleFile()
+
+  for (var key in obj) {
+    this.cache[this.locale][key] = obj[key]
+  }
+}
+
+module.exports = function (opts) {
+  var y18n = new Y18N(opts)
+
+  // bind all functions to y18n, so that
+  // they can be used in isolation.
+  for (var key in y18n) {
+    if (typeof y18n[key] === 'function') {
+      y18n[key] = y18n[key].bind(y18n)
+    }
+  }
+
+  return y18n
+}

node_modules/y18n/package.json

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+{
+  "name": "y18n",
+  "version": "4.0.3",
+  "description": "the bare-bones internationalization library used by yargs",
+  "main": "index.js",
+  "scripts": {
+    "pretest": "standard",
+    "test": "nyc mocha",
+    "coverage": "nyc report --reporter=text-lcov | coveralls",
+    "release": "standard-version"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git@github.com:yargs/y18n.git"
+  },
+  "files": [
+    "index.js"
+  ],
+  "keywords": [
+    "i18n",
+    "internationalization",
+    "yargs"
+  ],
+  "author": "Ben Coe <ben@npmjs.com>",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/yargs/y18n/issues"
+  },
+  "homepage": "https://github.com/yargs/y18n",
+  "devDependencies": {
+    "chai": "^4.0.1",
+    "coveralls": "^3.0.0",
+    "mocha": "^4.0.1",
+    "nyc": "^11.0.1",
+    "rimraf": "^2.5.0",
+    "standard": "^10.0.0-beta.0",
+    "standard-version": "^4.2.0"
+  }
+}