init: HejYou Language Learning App (React + Vite)

React SPA with Vite, Directus backend, canvas-confetti.
Includes Dockerfile (multi-stage Node → nginx) for Coolify deployment.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/utils/confetti.js

@@ -0,0 +1,10 @@
+import confetti from 'canvas-confetti'
+
+export function triggerConfetti() {
+  confetti({
+    particleCount: 120,
+    spread: 70,
+    origin: { y: 0.55 },
+    colors: ['#7A5C3A', '#C4A882', '#EDE0CE', '#D4B896', '#F5EFE6'],
+  })
+}