diff --git a/ui/src/App.vue b/ui/src/App.vue
index 75419b3..629d510 100644
--- a/ui/src/App.vue
+++ b/ui/src/App.vue
@@ -33,10 +33,10 @@
       </div>
       <div class="level-right">
         <div class="level-item">
-          <TouchButton class="tag is-warning" />
+          <TouchButton class="is-small is-warning" />
         </div>
         <div class="level-item">
-          <AdminButton class="tag is-link is-outlined" />
+          <AdminButton class="is-small is-link is-outlined" />
         </div>
       </div>
     </div>
diff --git a/ui/src/components/AdminButton.vue b/ui/src/components/AdminButton.vue
index e98f4bd..68a97d7 100644
--- a/ui/src/components/AdminButton.vue
+++ b/ui/src/components/AdminButton.vue
@@ -14,12 +14,13 @@
 import { APIError } from "@/lib/api_error";
 import { Credentials } from "@/lib/model";
 import { advent22Store } from "@/lib/store";
+import { ref } from "vue";
 
 import BulmaButton from "./bulma/Button.vue";
 import LoginModal from "./LoginModal.vue";
 
-let modal_visible = false;
-let is_busy = false;
+const modal_visible = ref(false);
+const is_busy = ref(false);
 const store = advent22Store();
 
 function on_click() {
@@ -27,22 +28,22 @@ function on_click() {
     store.logout();
   } else {
     // show login modal
-    is_busy = true;
-    modal_visible = true;
+    is_busy.value = true;
+    modal_visible.value = true;
   }
 }
 
 function on_submit(creds: Credentials) {
-  modal_visible = false;
+  modal_visible.value = false;
 
   store
     .login(creds)
     .catch((error) => APIError.alert(error))
-    .finally(() => (is_busy = false));
+    .finally(() => (is_busy.value = false));
 }
 
 function on_cancel() {
-  modal_visible = false;
-  is_busy = false;
+  modal_visible.value = false;
+  is_busy.value = false;
 }
 </script>
diff --git a/ui/src/components/Calendar.vue b/ui/src/components/Calendar.vue
index ab9e913..c5e93af 100644
--- a/ui/src/components/Calendar.vue
+++ b/ui/src/components/Calendar.vue
@@ -51,7 +51,7 @@ import { API } from "@/lib/api";
 import { APIError } from "@/lib/api_error";
 import { ensure_loaded, name_door } from "@/lib/helpers";
 import { ImageData } from "@/lib/model";
-import { Door } from "@/lib/rects/door";
+import { VueDoor } from "@/lib/rects/door";
 import { advent22Store } from "@/lib/store";
 
 import { onBeforeUnmount } from "vue";
@@ -62,7 +62,7 @@ import CalendarDoor from "./calendar/CalendarDoor.vue";
 import ThouCanvas from "./calendar/ThouCanvas.vue";
 
 defineProps<{
-  doors: Door[];
+  doors: VueDoor[];
 }>();
 
 const store = advent22Store();
@@ -81,7 +81,7 @@ function on_toast_handle(handle: HBulmaToast) {
   if (store.is_touch_device) return;
 
   store.when_initialized(() => {
-    toast_timeout = setTimeout(() => {
+    toast_timeout = window.setTimeout(() => {
       if (store.user_doors.length === 0) return;
       if (store.is_touch_device) return;
 
@@ -91,7 +91,7 @@ function on_toast_handle(handle: HBulmaToast) {
 }
 
 async function door_click(day: number) {
-  if (toast_timeout !== undefined) clearTimeout(toast_timeout);
+  window.clearTimeout(toast_timeout);
   toast?.hide();
 
   if (modal === undefined) return;
diff --git a/ui/src/components/CountDown.vue b/ui/src/components/CountDown.vue
index 34ef699..e4503e9 100644
--- a/ui/src/components/CountDown.vue
+++ b/ui/src/components/CountDown.vue
@@ -4,46 +4,45 @@
 
 <script setup lang="ts">
 import { Duration } from "luxon";
-import { onBeforeUnmount, onMounted } from "vue";
+import { onBeforeUnmount, onMounted, ref } from "vue";
 
 const props = withDefaults(
   defineProps<{
     until: number;
-    tick_time: number;
+    tick_time?: number;
   }>(),
   { tick_time: 200 },
 );
 
-let interval_id: number | null = null;
-let string_repr = "";
-
-function tick(): void {
-  const distance_ms = props.until - Date.now();
-
-  if (distance_ms <= 0) {
-    string_repr = "Jetzt!";
-    return;
-  }
-
-  const distance = Duration.fromMillis(distance_ms);
-  const d_days = distance.shiftTo("day").mapUnits(Math.floor);
-  const d_hms = distance.minus(d_days).shiftTo("hour", "minute", "second");
-
-  if (d_days.days > 0) {
-    string_repr = d_days.toHuman() + " ";
-  } else {
-    string_repr = "";
-  }
-  string_repr += d_hms.toFormat("hh:mm:ss");
-}
+let interval_id: number | undefined;
+const string_repr = ref("");
 
 onMounted(() => {
+  function tick(): void {
+    const distance_ms = props.until - Date.now();
+
+    if (distance_ms <= 0) {
+      string_repr.value = "Jetzt!";
+      return;
+    }
+
+    const distance = Duration.fromMillis(distance_ms);
+    const d_days = distance.shiftTo("day").mapUnits(Math.floor);
+    const d_hms = distance.minus(d_days).shiftTo("hour", "minute", "second");
+
+    if (d_days.days > 0) {
+      string_repr.value = d_days.toHuman() + " ";
+    } else {
+      string_repr.value = "";
+    }
+    string_repr.value += d_hms.toFormat("hh:mm:ss");
+  }
+
   tick();
   interval_id = window.setInterval(tick, props.tick_time);
 });
 
 onBeforeUnmount(() => {
-  if (interval_id === null) return;
   window.clearInterval(interval_id);
 });
 </script>
diff --git a/ui/src/components/LoginModal.vue b/ui/src/components/LoginModal.vue
index 044b1e7..f6bc73a 100644
--- a/ui/src/components/LoginModal.vue
+++ b/ui/src/components/LoginModal.vue
@@ -52,7 +52,6 @@ import { Credentials } from "@/lib/model";
 import { nextTick, onBeforeUnmount, onMounted, ref, useTemplateRef } from "vue";
 import BulmaButton from "./bulma/Button.vue";
 
-defineProps<{ visible: boolean }>();
 const username_input = useTemplateRef("username_input");
 
 const emit = defineEmits<{
diff --git a/ui/src/components/UserView.vue b/ui/src/components/UserView.vue
index 4f5b867..fe931b8 100644
--- a/ui/src/components/UserView.vue
+++ b/ui/src/components/UserView.vue
@@ -1,5 +1,5 @@
 <template>
-  <Calendar :doors="doors" />
+  <Calendar :doors="store.user_doors" />
   <hr />
   <div class="content" v-html="store.site_config.content" />
   <div class="content has-text-primary">
@@ -20,12 +20,10 @@
 </template>
 
 <script setup lang="ts">
-import { Door } from "@/lib/rects/door";
 import { advent22Store } from "@/lib/store";
 
 import Calendar from "./Calendar.vue";
 import CountDown from "./CountDown.vue";
 
 const store = advent22Store();
-const doors = store.user_doors as Door[];
 </script>
diff --git a/ui/src/components/admin/CalendarAssistant.vue b/ui/src/components/admin/CalendarAssistant.vue
index aa16652..9e23f09 100644
--- a/ui/src/components/admin/CalendarAssistant.vue
+++ b/ui/src/components/admin/CalendarAssistant.vue
@@ -49,17 +49,18 @@
 import { API } from "@/lib/api";
 import { name_door, objForEach } from "@/lib/helpers";
 import { ImageData, NumStrDict } from "@/lib/model";
+import { ref } from "vue";
 
 import MultiModal, { HMultiModal } from "../MultiModal.vue";
 import BulmaButton from "../bulma/Button.vue";
 import BulmaDrawer from "../bulma/Drawer.vue";
 
-const day_data: {
+const day_data = ref<{
   [day: number]: {
     part: string;
     image_name: string;
   };
-} = {};
+}>({});
 
 let modal: HMultiModal | undefined;
 
@@ -74,19 +75,19 @@ function on_open(ready: () => void, fail: () => void) {
   ])
     .then(([day_parts, day_image_names]) => {
       const _ensure_day_in_data = (day: number) => {
-        if (!(day in day_data)) {
-          day_data[day] = { part: "", image_name: "" };
+        if (!(day in day_data.value)) {
+          day_data.value[day] = { part: "", image_name: "" };
         }
       };
 
       objForEach(day_parts, (day, part) => {
         _ensure_day_in_data(day);
-        day_data[day].part = part;
+        day_data.value[day].part = part;
       });
 
       objForEach(day_image_names, (day, image_name) => {
         _ensure_day_in_data(day);
-        day_data[day].image_name = image_name;
+        day_data.value[day].image_name = image_name;
       });
 
       ready();
diff --git a/ui/src/components/admin/ConfigView.vue b/ui/src/components/admin/ConfigView.vue
index 50f91c3..9f32ad0 100644
--- a/ui/src/components/admin/ConfigView.vue
+++ b/ui/src/components/admin/ConfigView.vue
@@ -188,6 +188,7 @@ import { API } from "@/lib/api";
 import { AdminConfigModel, Credentials, DoorSaved } from "@/lib/model";
 import { advent22Store } from "@/lib/store";
 import { DateTime } from "luxon";
+import { ref } from "vue";
 
 import BulmaDrawer from "../bulma/Drawer.vue";
 import BulmaSecret from "../bulma/Secret.vue";
@@ -195,7 +196,7 @@ import CountDown from "../CountDown.vue";
 
 const store = advent22Store();
 
-let admin_config_model: AdminConfigModel = {
+const admin_config_model = ref<AdminConfigModel>({
   solution: {
     value: "ABCDEFGHIJKLMNOPQRSTUVWXYZ",
     whitespace: "KEEP",
@@ -233,14 +234,14 @@ let admin_config_model: AdminConfigModel = {
     cache_ttl: 0,
     config_file: "sed diam nonumy",
   },
-};
+});
 
-let doors: DoorSaved[] = [];
-let dav_credentials: Credentials = ["", ""];
-let ui_credentials: Credentials = ["", ""];
+const doors = ref<DoorSaved[]>([]);
+const dav_credentials = ref<Credentials>(["", ""]);
+const ui_credentials = ref<Credentials>(["", ""]);
 
 function fmt_puzzle_date(name: keyof AdminConfigModel["puzzle"]): string {
-  const iso_date = admin_config_model.puzzle[name];
+  const iso_date = admin_config_model.value.puzzle[name];
   if (!(typeof iso_date === "string")) return "-";
 
   return DateTime.fromISO(iso_date).toLocaleString(DateTime.DATE_SHORT);
@@ -255,8 +256,8 @@ function on_open(ready: () => void, fail: () => void): void {
     .then(([store_update, new_admin_config_model, new_doors]) => {
       store_update; // discard value
 
-      admin_config_model = new_admin_config_model;
-      doors = new_doors;
+      admin_config_model.value = new_admin_config_model;
+      doors.value = new_doors;
 
       ready();
     })
@@ -265,13 +266,13 @@ function on_open(ready: () => void, fail: () => void): void {
 
 function load_dav_credentials(): void {
   API.request<Credentials>("admin/dav_credentials")
-    .then((creds) => (dav_credentials = creds))
+    .then((creds) => (dav_credentials.value = creds))
     .catch(() => {});
 }
 
 function load_ui_credentials(): void {
   API.request<Credentials>("admin/ui_credentials")
-    .then((creds) => (ui_credentials = creds))
+    .then((creds) => (ui_credentials.value = creds))
     .catch(() => {});
 }
 </script>
diff --git a/ui/src/components/admin/DoorMapEditor.vue b/ui/src/components/admin/DoorMapEditor.vue
index 799fce5..df071ca 100644
--- a/ui/src/components/admin/DoorMapEditor.vue
+++ b/ui/src/components/admin/DoorMapEditor.vue
@@ -37,10 +37,10 @@
       </div>
     </div>
 
-    <DoorPlacer v-if="current_step === 0" v-model="doors" />
-    <DoorChooser v-if="current_step === 1" v-model="doors" />
+    <DoorPlacer v-if="current_step === 0" v-model="(doors as Door[])" />
+    <DoorChooser v-if="current_step === 1" v-model="(doors as Door[])" />
     <div v-if="current_step === 2" class="card-content">
-      <Calendar :doors="doors" />
+      <Calendar :doors="(doors as Door[])" />
     </div>
 
     <footer class="card-footer is-flex is-justify-content-space-around">
@@ -71,11 +71,11 @@
 <script setup lang="ts">
 import { API } from "@/lib/api";
 import { APIError } from "@/lib/api_error";
-import { Step } from "@/lib/helpers";
 import { DoorSaved } from "@/lib/model";
 import { Door } from "@/lib/rects/door";
 import { toast } from "bulma-toast";
 import { ref } from "vue";
+import { BCStep } from "../bulma/Breadcrumbs.vue";
 
 import Calendar from "../Calendar.vue";
 import BulmaBreadcrumbs from "../bulma/Breadcrumbs.vue";
@@ -84,26 +84,25 @@ import BulmaDrawer from "../bulma/Drawer.vue";
 import DoorChooser from "../editor/DoorChooser.vue";
 import DoorPlacer from "../editor/DoorPlacer.vue";
 
-const steps: Step[] = [
+const steps: BCStep[] = [
   { label: "Platzieren", icon: "fa-solid fa-crosshairs" },
   { label: "Ordnen", icon: "fa-solid fa-list-ol" },
   { label: "Vorschau", icon: "fa-solid fa-magnifying-glass" },
 ];
 
-const doors: Door[] = [];
-
+const doors = ref<Door[]>([]);
 const current_step = ref(0);
-let loading_doors = false;
-let saving_doors = false;
+const loading_doors = ref(false);
+const saving_doors = ref(false);
 
 function load_doors(): Promise<void> {
   return new Promise<void>((resolve, reject) => {
     API.request<DoorSaved[]>("admin/doors")
       .then((data) => {
-        doors.length = 0;
+        doors.value.length = 0;
 
         for (const value of data) {
-          doors.push(Door.load(value));
+          doors.value.push(Door.load(value));
         }
 
         resolve();
@@ -119,7 +118,7 @@ function save_doors(): Promise<void> {
   return new Promise<void>((resolve, reject) => {
     const data: DoorSaved[] = [];
 
-    for (const door of doors) {
+    for (const door of doors.value) {
       data.push(door.save());
     }
 
@@ -138,7 +137,7 @@ function on_open(ready: () => void, fail: () => void): void {
 
 function on_download() {
   if (confirm("Aktuelle Änderungen verwerfen und Status vom Server laden?")) {
-    loading_doors = true;
+    loading_doors.value = true;
 
     load_doors()
       .then(() =>
@@ -149,20 +148,20 @@ function on_download() {
         }),
       )
       .catch(() => {})
-      .finally(() => (loading_doors = false));
+      .finally(() => (loading_doors.value = false));
   }
 }
 
 function on_discard() {
   if (confirm("Alle Türchen löschen? (nur lokal)")) {
     // empty `doors` array
-    doors.length = 0;
+    doors.value.length = 0;
   }
 }
 
 function on_upload() {
   if (confirm("Aktuelle Änderungen an den Server schicken?")) {
-    saving_doors = true;
+    saving_doors.value = true;
 
     save_doors()
       .then(() => {
@@ -175,9 +174,9 @@ function on_upload() {
             }),
           )
           .catch(() => {})
-          .finally(() => (saving_doors = false));
+          .finally(() => (saving_doors.value = false));
       })
-      .catch(() => (saving_doors = false));
+      .catch(() => (saving_doors.value = false));
   }
 }
 </script>
diff --git a/ui/src/components/bulma/Breadcrumbs.vue b/ui/src/components/bulma/Breadcrumbs.vue
index ff14f46..ad5c05d 100644
--- a/ui/src/components/bulma/Breadcrumbs.vue
+++ b/ui/src/components/bulma/Breadcrumbs.vue
@@ -20,11 +20,14 @@
 </template>
 
 <script setup lang="ts">
-import { Step } from "@/lib/helpers";
+export interface BCStep {
+  label: string;
+  icon: string | string[];
+}
 
 const model = defineModel<number>({ required: true });
 
 defineProps<{
-  steps: Step[];
+  steps: BCStep[];
 }>();
 </script>
diff --git a/ui/src/components/bulma/Toast.vue b/ui/src/components/bulma/Toast.vue
index ecb2b2b..cd5d985 100644
--- a/ui/src/components/bulma/Toast.vue
+++ b/ui/src/components/bulma/Toast.vue
@@ -9,7 +9,7 @@
 
 <script setup lang="ts">
 import { Options as ToastOptions, toast } from "bulma-toast";
-import { onMounted, ref } from "vue";
+import { onMounted, useTemplateRef } from "vue";
 
 export type HBulmaToast = {
   show(options: ToastOptions): void;
@@ -20,7 +20,7 @@ const emit = defineEmits<{
   (event: "handle", handle: HBulmaToast): void;
 }>();
 
-const message = ref<HTMLDivElement | null>(null);
+const message = useTemplateRef("message");
 
 onMounted(() =>
   emit("handle", {
@@ -34,10 +34,10 @@ onMounted(() =>
       });
     },
     hide() {
-      if (!(message.value instanceof HTMLElement)) return;
+      if (message.value === null) return;
 
       const toast_div = message.value.parentElement;
-      if (!(toast_div instanceof HTMLDivElement)) return;
+      if (toast_div === null) return;
 
       const dbutton = toast_div.querySelector("button.delete");
       if (!(dbutton instanceof HTMLButtonElement)) return;
diff --git a/ui/src/components/calendar/CalendarDoor.vue b/ui/src/components/calendar/CalendarDoor.vue
index 0f1d4b2..cf7837e 100644
--- a/ui/src/components/calendar/CalendarDoor.vue
+++ b/ui/src/components/calendar/CalendarDoor.vue
@@ -14,7 +14,7 @@
 </template>
 
 <script setup lang="ts">
-import { Door } from "@/lib/rects/door";
+import { VueDoor } from "@/lib/rects/door";
 import { advent22Store } from "@/lib/store";
 
 import SVGRect from "./SVGRect.vue";
@@ -23,8 +23,8 @@ const store = advent22Store();
 
 withDefaults(
   defineProps<{
-    door: Door;
-    force_visible: boolean;
+    door: VueDoor;
+    force_visible?: boolean;
   }>(),
   {
     force_visible: false,
diff --git a/ui/src/components/calendar/SVGRect.vue b/ui/src/components/calendar/SVGRect.vue
index d167abc..9e3fac9 100644
--- a/ui/src/components/calendar/SVGRect.vue
+++ b/ui/src/components/calendar/SVGRect.vue
@@ -21,7 +21,7 @@
 
 <script setup lang="ts">
 import { loading_success } from "@/lib/helpers";
-import { Rectangle } from "@/lib/rects/rectangle";
+import { VueRectangle } from "@/lib/rects/rectangle";
 import { advent22Store } from "@/lib/store";
 
 const store = advent22Store();
@@ -38,7 +38,7 @@ withDefaults(
   defineProps<{
     variant: BulmaVariant;
     visible?: boolean;
-    rectangle: Rectangle;
+    rectangle: VueRectangle;
   }>(),
   {
     visible: true,
diff --git a/ui/src/components/editor/DoorCanvas.vue b/ui/src/components/editor/DoorCanvas.vue
index 08a2c9d..789bb78 100644
--- a/ui/src/components/editor/DoorCanvas.vue
+++ b/ui/src/components/editor/DoorCanvas.vue
@@ -27,6 +27,7 @@
 import { Door } from "@/lib/rects/door";
 import { Rectangle } from "@/lib/rects/rectangle";
 import { Vector2D } from "@/lib/rects/vector2d";
+import { ref } from "vue";
 
 import CalendarDoor from "../calendar/CalendarDoor.vue";
 import SVGRect from "../calendar/SVGRect.vue";
@@ -40,11 +41,11 @@ type CanvasState =
 const model = defineModel<Door[]>({ required: true });
 
 const MIN_RECT_AREA = 300;
-let state: CanvasState = { kind: "idle" };
-let preview = new Rectangle();
+const state = ref<CanvasState>({ kind: "idle" });
+const preview = ref(new Rectangle());
 
 function preview_visible(): boolean {
-  return state.kind !== "idle";
+  return state.value.kind !== "idle";
 }
 
 function pop_door(point: Vector2D): Door | undefined {
@@ -62,18 +63,18 @@ function draw_start(event: MouseEvent, point: Vector2D) {
     return;
   }
 
-  preview = new Rectangle(point, point);
-  state = { kind: "drawing" };
+  preview.value = new Rectangle(point, point);
+  state.value = { kind: "drawing" };
 }
 
 function draw_finish() {
-  if (state.kind !== "drawing" || preview.area < MIN_RECT_AREA) {
+  if (state.value.kind !== "drawing" || preview.value.area < MIN_RECT_AREA) {
     return;
   }
 
-  model.value.push(new Door(preview));
+  model.value.push(new Door(preview.value as Rectangle));
 
-  state = { kind: "idle" };
+  state.value = { kind: "idle" };
 }
 
 function drag_start(event: MouseEvent, point: Vector2D) {
@@ -87,27 +88,27 @@ function drag_start(event: MouseEvent, point: Vector2D) {
     return;
   }
 
-  preview = drag_door.position;
+  preview.value = drag_door.position;
 
-  state = { kind: "dragging", door: drag_door, origin: point };
+  state.value = { kind: "dragging", door: drag_door, origin: point };
 }
 
 function drag_finish() {
-  if (state.kind !== "dragging") {
+  if (state.value.kind !== "dragging") {
     return;
   }
 
-  model.value.push(new Door(preview, state.door.day));
+  model.value.push(new Door(preview.value as Rectangle, state.value.door.day));
 
-  state = { kind: "idle" };
+  state.value = { kind: "idle" };
 }
 
 function on_mousemove(event: MouseEvent, point: Vector2D) {
-  if (state.kind === "drawing") {
-    preview = preview.update(undefined, point);
-  } else if (state.kind === "dragging") {
-    const movement = point.minus(state.origin);
-    preview = state.door.position.move(movement);
+  if (state.value.kind === "drawing") {
+    preview.value = preview.value.update(undefined, point);
+  } else if (state.value.kind === "dragging") {
+    const movement = point.minus(state.value.origin);
+    preview.value = state.value.door.position.move(movement);
   }
 }
 
diff --git a/ui/src/components/editor/PreviewDoor.vue b/ui/src/components/editor/PreviewDoor.vue
index 2217ea0..c29c8a3 100644
--- a/ui/src/components/editor/PreviewDoor.vue
+++ b/ui/src/components/editor/PreviewDoor.vue
@@ -32,11 +32,11 @@ const model = defineModel<Door>({ required: true });
 const day_input = useTemplateRef("day_input");
 
 const day_str = ref("");
-let editing = false;
+const editing = ref(false);
 
 function toggle_editing() {
   day_str.value = String(model.value.day);
-  editing = !editing;
+  editing.value = !editing.value;
 }
 
 function on_click(event: MouseEvent) {
@@ -44,7 +44,7 @@ function on_click(event: MouseEvent) {
     return;
   }
 
-  if (!editing) {
+  if (!editing.value) {
     const day_input_focus = () => {
       if (day_input.value === null) {
         nextTick(day_input_focus);
@@ -62,7 +62,7 @@ function on_click(event: MouseEvent) {
 }
 
 function on_keydown(event: KeyboardEvent) {
-  if (!editing) {
+  if (!editing.value) {
     return;
   }
 
diff --git a/ui/src/lib/helpers.ts b/ui/src/lib/helpers.ts
index ecce928..74ef4e7 100644
--- a/ui/src/lib/helpers.ts
+++ b/ui/src/lib/helpers.ts
@@ -37,8 +37,3 @@ export function handle_error(error: unknown) {
 export function name_door(day: number): string {
   return `Türchen ${day}`;
 }
-
-export interface Step {
-  label: string;
-  icon: string | string[];
-}
diff --git a/ui/src/lib/rects/door.ts b/ui/src/lib/rects/door.ts
index 19df8f2..bac193c 100644
--- a/ui/src/lib/rects/door.ts
+++ b/ui/src/lib/rects/door.ts
@@ -1,3 +1,4 @@
+import { UnwrapRef } from "vue";
 import { DoorSaved } from "../model";
 import { Rectangle } from "./rectangle";
 import { Vector2D } from "./vector2d";
@@ -50,3 +51,5 @@ export class Door {
     };
   }
 }
+
+export type VueDoor = UnwrapRef<Door>;
diff --git a/ui/src/lib/rects/rectangle.ts b/ui/src/lib/rects/rectangle.ts
index 3c7ec63..ca3be79 100644
--- a/ui/src/lib/rects/rectangle.ts
+++ b/ui/src/lib/rects/rectangle.ts
@@ -1,3 +1,4 @@
+import { UnwrapRef } from "vue";
 import { Vector2D } from "./vector2d";
 
 export class Rectangle {
@@ -77,3 +78,5 @@ export class Rectangle {
     );
   }
 }
+
+export type VueRectangle = UnwrapRef<Rectangle>;