feat: initial project setup with frontend mockup

- Docker Compose setup with nginx reverse proxy and frontend service
- React + Vite + Tailwind CSS configuration
- Complete mockup of all application views:
  - Authentication (login/register)
  - Events list and selection
  - Event chat with matchmaking
  - 1:1 private chat with WebRTC P2P video transfer mockup
  - Partner rating system
  - Collaboration history
- Mock data for users, events, messages, matches, and ratings
- All UI text and messages in English
- Project documentation (CONTEXT.md, TODO.md, README.md, QUICKSTART.md)

frontend/src/App.css

@@ -0,0 +1,42 @@
+#root {
+  max-width: 1280px;
+  margin: 0 auto;
+  padding: 2rem;
+  text-align: center;
+}
+
+.logo {
+  height: 6em;
+  padding: 1.5em;
+  will-change: filter;
+  transition: filter 300ms;
+}
+.logo:hover {
+  filter: drop-shadow(0 0 2em #646cffaa);
+}
+.logo.react:hover {
+  filter: drop-shadow(0 0 2em #61dafbaa);
+}
+
+@keyframes logo-spin {
+  from {
+    transform: rotate(0deg);
+  }
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+@media (prefers-reduced-motion: no-preference) {
+  a:nth-of-type(2) .logo {
+    animation: logo-spin infinite 20s linear;
+  }
+}
+
+.card {
+  padding: 2em;
+}
+
+.read-the-docs {
+  color: #888;
+}