fix bug in windows

app/src-tauri/src/db.rs

@@ -11,7 +11,7 @@ impl DBManager {
 
       conn.execute("CREATE TABLE IF NOT EXISTS Subjects (
         id INTEGER PRIMARY KEY AUTOINCREMENT, 
-        name TEXT NOT NULL)", [])
+        name TEXT UNIQUE NOT NULL)", [])
         .unwrap_or_else(|_| stop_app("Error creating table Subjects"));
 
       conn.execute("CREATE TABLE IF NOT EXISTS Tasks (

app/src/App.svelte

 <script lang="js">
-	import { invoke } from "@tauri-apps/api";
 	import { fade, fly, slide, scale } from "svelte/transition";
 	import { onMount } from 'svelte';
-
 	import locales from "./locales.json";
 	import { ScreenLock } from "./screenlock.js";
 	import { ConfigManager, defaultConfig } from "./configmanager.js";