WIP: Staged all changes

frontend/src/lib/toasts.js

@@ -0,0 +1,13 @@
+import { writable } from 'svelte/store';
+
+export const toasts = writable([]);
+
+export function addToast(message, type = 'info', duration = 3000) {
+    const id = Math.random().toString(36).substr(2, 9);
+    toasts.update(all => [...all, { id, message, type }]);
+    setTimeout(() => removeToast(id), duration);
+}
+
+function removeToast(id) {
+    toasts.update(all => all.filter(t => t.id !== id));
+}