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

src/network/EnhancedSecureWebRTCManager.js

@@ -1580,10 +1580,7 @@ this._secureLog('info', '🔒 Enhanced Mutex system fully initialized and valida
             this._originalConsole?.error?.('🚨 CRITICAL: Logging system disabled due to security violations');
         }
     }
-    /**
-     *   Shim to redirect arbitrary console.log calls to _secureLog('info', ...)
-     * Fixed syntax errors and improved error handling
-     */
+
     _secureLogShim(...args) {
         try {
             // Validate arguments array
@@ -1622,10 +1619,7 @@ this._secureLog('info', '🔒 Enhanced Mutex system fully initialized and valida
             }
         }
     }
-    /**
-     *   Redirects global console.log to this instance's secure logger
-     * Improved error handling and validation
-     */
+
     /**
      *   Setup own logger without touching global console
      */
@@ -3378,13 +3372,10 @@ this._secureLog('info', '🔒 Enhanced Mutex system fully initialized and valida
 
             const enc = new TextEncoder();
 
-            // Соль связываем с обоими DTLS-fingerprints (в отсортированном порядке),
-            // чтобы SAS «привязался» к реальному транспорту и его сертификатам
             const salt = enc.encode(
                 'webrtc-sas|' + [localFP, remoteFP].sort().join('|')
             );
 
-            // Подготавливаем keyMaterialRaw для использования
             let keyBuffer;
             if (keyMaterialRaw instanceof ArrayBuffer) {
                 keyBuffer = keyMaterialRaw;
@@ -3420,9 +3411,8 @@ this._secureLog('info', '🔒 Enhanced Mutex system fully initialized and valida
             );
 
             const dv = new DataView(bits);
-            // Смешиваем оба 32-битных слова и получаем 7-значный код
             const n = (dv.getUint32(0) ^ dv.getUint32(4)) >>> 0;
-            const sasCode = String(n % 10_000_000).padStart(7, '0'); // 7 символов
+            const sasCode = String(n % 10_000_000).padStart(7, '0'); 
 
             console.log('🎯 _computeSAS computed code:', sasCode, '(type:', typeof sasCode, ')');
 
@@ -6947,14 +6937,7 @@ async processMessage(data) {
             } else if (state === 'failed') {
                 // Do not auto-reconnect to avoid closing the session on errors
                 this.onStatusChange('disconnected');
-                // if (!this.intentionalDisconnect && this.connectionAttempts < this.maxConnectionAttempts) {
-                //     this.connectionAttempts++;
-                //     setTimeout(() => this.retryConnection(), 2000);
-                // } else {
-                //     this.onStatusChange('disconnected');
-                //     // Do not call cleanupConnection automatically for 'failed'
-                //     // to avoid closing the session on connection errors
-                // }
+
             } else {
                 this.onStatusChange(state);
             }
@@ -9100,11 +9083,7 @@ async processMessage(data) {
                     this.ecdsaKeyPair.privateKey,
                     'ECDSA'
                 );
-                
-                // CRITICAL: Strict validation of exported data with hard disconnect on failure
-                // - Any validation failure in critical security path must abort connection
-                // - No fallback allowed for cryptographic validation
-                // - Prevent bypass of security checks through syntax/validation errors
+
                 
                 if (!ecdhPublicKeyData || typeof ecdhPublicKeyData !== 'object') {
                     this._secureLog('error', 'CRITICAL: ECDH key export failed - invalid object structure', { operationId });