Dev: keep Vite off the workspace's target/ so tauri dev starts

`npm run tauri dev` died before the window opened: Vite's watcher crashed
with EBUSY on target\debug\deps\odian_launcher_lib.dll. Root cause: the Cargo
workspace builds into target/ at the repo root, not under src-tauri/, and
vite.config.ts only excluded src-tauri - so Vite watched the DLLs the Rust
build holds locked.

Spot-check: a fresh clone, `npm install`, `npm run tauri dev` opens the
launcher window instead of "beforeDevCommand terminated".

vite.config.ts

@@ -2,14 +2,16 @@ import { defineConfig } from "vite";
 import { svelte } from "@sveltejs/vite-plugin-svelte";
 
 // Tauri loads the dev server from a fixed port and fails if it is taken, and
-// rebuilds the Rust side itself, so Vite must not watch src-tauri.
+// rebuilds the Rust side itself, so Vite must not watch src-tauri - nor the
+// workspace's target/ at the repo root, whose DLLs the build holds locked
+// (watching one crashes Vite with EBUSY).
 export default defineConfig({
   plugins: [svelte()],
   clearScreen: false,
   server: {
     port: 1420,
     strictPort: true,
-    watch: { ignored: ["**/src-tauri/**"] },
+    watch: { ignored: ["**/src-tauri/**", "**/target/**"] },
   },
   envPrefix: ["VITE_", "TAURI_ENV_"],
   build: {