fix(env): fix vite config to integrate with tauri (#128)

## Summary by Sourcery

Align Vite development server configuration with Tauri requirements for
the UI package.

Enhancements:
- Configure Vite dev server with fixed Tauri ports, optional host-based
HMR, and ignored `src-tauri` directory to support Tauri development
workflows.

Chores:
- Add a changeset entry documenting the Vite–Tauri integration change
and remove the unused example environment file.

4 files changed, 27 insertions, 9 deletions

diff --git a/.changes/vite-tauri.md b/.changes/vite-tauri.md
new file mode 100644
index 0000000..45d5d64
--- /dev/null
+++ b/.changes/vite-tauri.md
@@ -0,0 +1,5 @@
+---
+"@dropout/ui": "patch:chore"
+---
+
+Fix vite config to integrate with Tauri.
diff --git a/.env.example b/.env.example
deleted file mode 100644
index 9e7e55a..0000000
--- a/.env.example
+++ /dev/null
@@ -1,7 +0,0 @@
-# Copy this file to .env and fill in values to enable optional features at build time.
-# .env is gitignored and will never be committed.
-
-# CurseForge API key — required only to build with CurseForge modpack support.
-# Obtain one at https://console.curseforge.com/
-# If absent, CurseForge modpack import is disabled at runtime (all other features work normally).
-# CURSEFORGE_API_KEY=your_key_here
diff --git a/packages/ui/vite.config.ts b/packages/ui/vite.config.ts
index 241ca8f..34df162 100644
--- a/packages/ui/vite.config.ts
+++ b/packages/ui/vite.config.ts
@@ -3,12 +3,31 @@ import tailwindcss from "@tailwindcss/vite";
 import react from "@vitejs/plugin-react";
 import { defineConfig } from "vite";
 
+const host = process.env.TAURI_DEV_HOST;
+
 // https://vite.dev/config/
 export default defineConfig({
   plugins: [react(), tailwindcss()],
+  // Vite options tailored for Tauri development and only applied in `tauri dev` or `tauri build`
+  //
+  // 1. prevent Vite from obscuring rust errors
+  clearScreen: false,
+  // 2. tauri expects a fixed port, fail if that port is not available
   server: {
-    port: 5173,
+    port: 1420,
     strictPort: true,
+    host: host || false,
+    hmr: host
+      ? {
+          protocol: "ws",
+          host,
+          port: 1421,
+        }
+      : undefined,
+    watch: {
+      // 3. tell Vite to ignore watching `src-tauri`
+      ignored: ["**/src-tauri/**"],
+    },
   },
   resolve: {
     alias: {
diff --git a/src-tauri/tauri.conf.json b/src-tauri/tauri.conf.json
index 9ab9e6a..a387d6c 100644
--- a/src-tauri/tauri.conf.json
+++ b/src-tauri/tauri.conf.json
@@ -1,11 +1,12 @@
 {
+  "$schema": "https://schema.tauri.app/config/2",
   "productName": "Dropout",
   "version": "0.2.0-alpha.5",
   "identifier": "com.dropout.launcher",
   "build": {
     "beforeDevCommand": "pnpm --filter @dropout/ui dev",
     "beforeBuildCommand": "pnpm --filter @dropout/ui build",
-    "devUrl": "http://127.0.0.1:5173",
+    "devUrl": "http://localhost:1420",
     "frontendDist": "../packages/ui/dist"
   },
   "app": {