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/yargs/build/lib/apply-extends.js

@@ -0,0 +1,65 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.applyExtends = void 0;
+const fs = require("fs");
+const path = require("path");
+const yerror_1 = require("./yerror");
+let previouslyVisitedConfigs = [];
+function checkForCircularExtends(cfgPath) {
+    if (previouslyVisitedConfigs.indexOf(cfgPath) > -1) {
+        throw new yerror_1.YError(`Circular extended configurations: '${cfgPath}'.`);
+    }
+}
+function getPathToDefaultConfig(cwd, pathToExtend) {
+    return path.resolve(cwd, pathToExtend);
+}
+function mergeDeep(config1, config2) {
+    const target = {};
+    function isObject(obj) {
+        return obj && typeof obj === 'object' && !Array.isArray(obj);
+    }
+    Object.assign(target, config1);
+    for (const key of Object.keys(config2)) {
+        if (isObject(config2[key]) && isObject(target[key])) {
+            target[key] = mergeDeep(config1[key], config2[key]);
+        }
+        else {
+            target[key] = config2[key];
+        }
+    }
+    return target;
+}
+function applyExtends(config, cwd, mergeExtends = false) {
+    let defaultConfig = {};
+    if (Object.prototype.hasOwnProperty.call(config, 'extends')) {
+        if (typeof config.extends !== 'string')
+            return defaultConfig;
+        const isPath = /\.json|\..*rc$/.test(config.extends);
+        let pathToDefault = null;
+        if (!isPath) {
+            try {
+                pathToDefault = require.resolve(config.extends);
+            }
+            catch (err) {
+                // most likely this simply isn't a module.
+            }
+        }
+        else {
+            pathToDefault = getPathToDefaultConfig(cwd, config.extends);
+        }
+        // maybe the module uses key for some other reason,
+        // err on side of caution.
+        if (!pathToDefault && !isPath)
+            return config;
+        if (!pathToDefault)
+            throw new yerror_1.YError(`Unable to find extended config '${config.extends}' in '${cwd}'.`);
+        checkForCircularExtends(pathToDefault);
+        previouslyVisitedConfigs.push(pathToDefault);
+        defaultConfig = isPath ? JSON.parse(fs.readFileSync(pathToDefault, 'utf8')) : require(config.extends);
+        delete config.extends;
+        defaultConfig = applyExtends(defaultConfig, path.dirname(pathToDefault), mergeExtends);
+    }
+    previouslyVisitedConfigs = [];
+    return mergeExtends ? mergeDeep(defaultConfig, config) : Object.assign({}, defaultConfig, config);
+}
+exports.applyExtends = applyExtends;