refactor: rename API and frontend projects to Vocero

Rename the project directories, Python distribution and import package, and npm package. Update launcher, Docker, tooling, tests, lockfiles, and documentation while preserving existing API contracts.

Make AGENTS.md self-contained and remove external skill and workflow references.

vocero-frontend/vite.config.ts

@@ -0,0 +1,28 @@
+import { fileURLToPath } from "node:url";
+
+import tailwindcss from "@tailwindcss/vite";
+import react from "@vitejs/plugin-react";
+import { defineConfig, loadEnv } from "vite";
+
+import { createBackendProxy } from "./config/backend-proxy.ts";
+
+export default defineConfig(({ mode }) => {
+  // Read this project's configuration; the repository .env contains server secrets.
+  const env = loadEnv(mode, process.cwd(), "S2S_");
+  return {
+    plugins: [react(), tailwindcss()],
+    resolve: { alias: { "@": fileURLToPath(new URL("./src", import.meta.url)) } },
+    server: {
+      host: "127.0.0.1",
+      port: 8420,
+      strictPort: true,
+      ws: { path: "/__vite_hmr" },
+      allowedHosts: (env.S2S_DEV_ALLOWED_HOSTS ?? "")
+        .split(",")
+        .map((host) => host.trim())
+        .filter(Boolean),
+      proxy: createBackendProxy(env.S2S_BACKEND_URL ?? "http://127.0.0.1:8421"),
+    },
+    build: { target: "es2022" },
+  };
+});