Синхронизация моделей, Docker настройки и исправление Angular шаблонов

- V1__init.sql: синхронизированы таблицы с Java моделями (users, folders, messages, contacts)
- docker-compose.yml: обновлён контекст сборки, переменные R2DBC/Flyway, порты (5433, 3026, 1443)
- backend/Dockerfile: обновлены пути COPY для нового контекста сборки
- settings.gradle: удалён frontend проект из Gradle
- contacts.component.html: исправлен ternary оператор с HTML на Angular @if/@else
- Фронтенд компоненты: обновления compose, inbox, layout, login, message-detail, register
- index.html, styles.css: обновления стилей и мета-данных

Co-authored-by: Junie <junie@jetbrains.com>

frontend/src/app/components/layout/layout.component.ts

@@ -76,7 +76,7 @@ const THEMES = [
                       [attr.aria-pressed]="isHighContrast()"
                       title="Toggle High Contrast Mode"
                       class="px-3 py-1.5 rounded-lg border border-cyan-500/40 bg-slate-900/80 text-xs font-mono hover:bg-cyan-500/20 focus:outline-none focus:ring-2 focus:ring-pink-500 transition-all flex items-center gap-1.5">
-                <span class="text-yellow-400">◐</span>
+                <i class="fa-solid fa-circle-half-stroke text-yellow-400"></i>
                 <span>Contrast</span>
               </button>
 
@@ -87,7 +87,7 @@ const THEMES = [
 
               <!-- Logout -->
               <button (click)="onLogout()" class="cyber-btn px-4 py-1.5 rounded-lg text-xs font-bold">
-                ⏻ Logout
+                <i class="fa-solid fa-power-off mr-1"></i> Logout
               </button>
             </div>
           </div>
@@ -99,7 +99,7 @@ const THEMES = [
           <aside class="w-64 flex-shrink-0">
             <div class="glass-panel p-4">
               <h2 class="text-sm font-orbitron font-bold text-cyan-300 mb-3 flex items-center gap-2">
-                <span class="text-pink-500">📁</span> FOLDERS
+                <i class="fa-solid fa-folder-tree text-pink-500"></i> FOLDERS
               </h2>
               <nav class="space-y-1">
                 @for (folder of folders(); track folder.id) {
@@ -123,14 +123,14 @@ const THEMES = [
               <a routerLink="/contacts"
                  routerLinkActive="bg-cyan-500/20 text-cyan-300 border-cyan-500"
                  class="block px-3 py-2 rounded-lg text-sm font-rajdhani text-slate-300 hover:bg-cyan-500/10 hover:text-cyan-300 border border-transparent transition-all">
-                👥 Contacts
+                <i class="fa-solid fa-address-book mr-2"></i> Contacts
               </a>
             </div>
 
             <!-- Кнопка написать -->
             <div class="glass-panel p-4 mt-4">
               <a routerLink="/compose" class="cyber-btn w-full py-3 rounded-xl text-xs font-bold block text-center">
-                ✉️ NEW MESSAGE
+                <i class="fa-solid fa-pen-to-square mr-2"></i> NEW MESSAGE
               </a>
             </div>
           </aside>
@@ -146,8 +146,8 @@ const THEMES = [
           <div class="max-w-7xl mx-auto flex flex-col sm:flex-row items-center justify-between gap-2">
             <div>MAILSERVER SYNTHWAVE &copy; 2026</div>
             <div class="flex items-center space-x-4">
-              <span class="text-cyan-400">◉ A11Y READY</span>
-              <span class="text-pink-400">⚡ HIGH PERF CSS3D</span>
+              <span class="text-cyan-400"><i class="fa-solid fa-universal-access mr-1"></i> A11Y READY</span>
+              <span class="text-pink-400"><i class="fa-solid fa-bolt mr-1"></i> HIGH PERF CSS3D</span>
             </div>
           </div>
         </footer>