web: dialog system & basic small dialog

web/src/lib/dialogs.ts

@@ -0,0 +1,23 @@
+import { readable, type Updater } from "svelte/store";
+import type { DialogInfo } from "$lib/types/dialog";
+
+let update: (_: Updater<DialogInfo[]>) => void;
+
+export default readable<DialogInfo[]>(
+    [],
+    (_, _update) => { update = _update }
+);
+
+export function createDialog(newData: DialogInfo) {
+    update((popups) => {
+        popups.push(newData);
+        return popups;
+    });
+}
+
+export function killDialog() {
+    update((popups) => {
+        popups.pop()
+        return popups;
+    });
+}