scaffold the app: tauri crate, vite front end, icons, ci

vite.config.ts

@@ -0,0 +1,32 @@
+import { defineConfig } from "vitest/config";
+import react from "@vitejs/plugin-react";
+
+// @ts-expect-error process is a nodejs global
+const host = process.env.TAURI_DEV_HOST;
+
+// Ports are offset from margin's 1420/1421 and the calendar's 1430/1431, so all three apps can run
+// side by side.
+export default defineConfig({
+  plugins: [react()],
+
+  clearScreen: false,
+  server: {
+    port: 1440,
+    strictPort: true,
+    host: host || false,
+    hmr: host
+      ? {
+          protocol: "ws",
+          host,
+          port: 1441,
+        }
+      : undefined,
+    watch: {
+      ignored: ["**/src-tauri/**"],
+    },
+  },
+  test: {
+    include: ["src/**/*.test.ts"],
+    environment: "node",
+  },
+});