Add web client and containerized deployment stack

Web client:

- Added React + TypeScript + Vite + Tailwind application in web/.

- Implemented auth, chat list, chat messages, typing indicators, file uploads, and voice recording/playback.

- Added typed API layer, Zustand stores, and realtime websocket hook integration.

Containerization:

- Added backend Dockerfile and project .dockerignore.

- Added web multi-stage Dockerfile with nginx static hosting and API/WS reverse proxy.

- Added full docker-compose stack with postgres, redis, minio, backend, worker, mailpit, and web.

- Added MinIO bucket bootstrap init job and updated README with Docker quick-start.

web/src/api/http.ts

@@ -0,0 +1,17 @@
+import axios from "axios";
+import { useAuthStore } from "../store/authStore";
+
+const apiBaseUrl = import.meta.env.VITE_API_BASE_URL ?? "/api/v1";
+
+export const http = axios.create({
+  baseURL: apiBaseUrl,
+  timeout: 10000
+});
+
+http.interceptors.request.use((config) => {
+  const token = useAuthStore.getState().accessToken;
+  if (token) {
+    config.headers.Authorization = `Bearer ${token}`;
+  }
+  return config;
+});