feat(ui): add stateful toast utility

Small wrapper around chakra's toast system simplifies creating and updating toasts. See comments in toast.ts for details.

invokeai/frontend/web/src/features/toast/ToastWithSessionRefDescription.tsx

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+import { Flex, IconButton, Text } from '@invoke-ai/ui-library';
+import { t } from 'i18next';
+import { PiCopyBold } from 'react-icons/pi';
+
+function onCopy(sessionId: string) {
+  navigator.clipboard.writeText(sessionId);
+}
+
+type Props = { message: string; sessionId: string };
+
+export default function ToastWithSessionRefDescription({ message, sessionId }: Props) {
+  return (
+    <Flex flexDir="column">
+      <Text fontSize="md">{message}</Text>
+      <Flex gap="2" alignItems="center">
+        <Text fontSize="sm">{t('toast.sessionRef', { sessionId })}</Text>
+        <IconButton
+          size="sm"
+          aria-label="Copy"
+          icon={<PiCopyBold />}
+          onClick={onCopy.bind(null, sessionId)}
+          variant="ghost"
+        />
+      </Flex>
+    </Flex>
+  );
+}

invokeai/frontend/web/src/features/toast/toast.ts

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+import type { UseToastOptions } from '@invoke-ai/ui-library';
+import { createStandaloneToast, theme, TOAST_OPTIONS } from '@invoke-ai/ui-library';
+import { map } from 'nanostores';
+import { z } from 'zod';
+
+const toastApi = createStandaloneToast({
+  theme: theme,
+  defaultOptions: TOAST_OPTIONS.defaultOptions,
+}).toast;
+
+// Slightly modified version of UseToastOptions
+type ToastConfig = Omit<UseToastOptions, 'id'> & {
+  // Only string - Chakra allows numbers
+  id?: string;
+};
+
+type ToastArg = ToastConfig & {
+  /**
+   * Whether to append the number of times this toast has been shown to the title. Defaults to true.
+   * @example
+   * toast({ title: 'Hello', withCount: true });
+   * // first toast: 'Hello'
+   * // second toast: 'Hello (2)'
+   */
+  withCount?: boolean;
+};
+
+/* eslint-disable @typescript-eslint/no-explicit-any */
+// Any is correct here; we accept anything as toast data parameter.
+type ToastInternalState = {
+  id: string;
+  config: ToastConfig;
+  count: number;
+};
+
+// We expose a limited API for the toast
+type ToastApi = {
+  getState: () => ToastInternalState | null;
+  close: () => void;
+  isActive: () => boolean;
+};
+
+// Store each toast state by id, allowing toast consumers to not worry about persistent ids and updating and such
+const $toastMap = map<Record<string, ToastInternalState | undefined>>({});
+
+// Helpers to get the getters for the toast API
+const getIsActive = (id: string) => () => toastApi.isActive(id);
+const getClose = (id: string) => () => toastApi.close(id);
+const getGetState = (id: string) => () => $toastMap.get()[id] ?? null;
+
+/**
+ * Creates a toast with the given config. If the toast with the same id already exists, it will be updated.
+ * When a toast is updated, its title, description, status and duration will be overwritten by the new config.
+ * Set duration to `null` to make the toast persistent.
+ * @param arg The toast config.
+ * @returns An object with methods to get the toast state, close the toast and check if the toast is active
+ */
+export const toast = (arg: ToastArg): ToastApi => {
+  // All toasts need an id, set a random one if not provided
+  const id = arg.id ?? crypto.randomUUID();
+  if (!arg.id) {
+    arg.id = id;
+  }
+  if (arg.withCount === undefined) {
+    arg.withCount = true;
+  }
+  let state = $toastMap.get()[arg.id];
+  if (!state) {
+    // First time caller, create and set the state
+    state = { id, config: parseConfig(id, arg, 1), count: 1 };
+    $toastMap.setKey(id, state);
+    // Create the toast
+    toastApi(state.config);
+  } else {
+    // This toast is already active, update its state
+    state.count += 1;
+    state.config = parseConfig(id, arg, state.count);
+    $toastMap.setKey(id, state);
+    // Update the toast itself
+    toastApi.update(id, state.config);
+  }
+  return { getState: getGetState(id), close: getClose(id), isActive: getIsActive(id) };
+};
+
+/**
+ * Give a toast id, arg and current count, returns the parsed toast config (including dynamic title and description)
+ * @param id The id of the toast
+ * @param arg The arg passed to the toast function
+ * @param count The current call count of the toast
+ * @returns The parsed toast config
+ */
+const parseConfig = (id: string, arg: ToastArg, count: number): ToastConfig => {
+  const title = arg.withCount && count > 1 ? `${arg.title} (${count})` : arg.title;
+  const onCloseComplete = () => {
+    $toastMap.setKey(id, undefined);
+    if (arg.onCloseComplete) {
+      arg.onCloseComplete();
+    }
+  };
+  return { ...arg, title, onCloseComplete };
+};
+
+/**
+ * Enum of toast IDs that are often shared between multiple components (typo insurance)
+ */
+export const ToastID = z.enum([
+  'MODEL_INSTALL_QUEUED',
+  'MODEL_INSTALL_QUEUE_FAILED',
+  'GRAPH_QUEUE_FAILED',
+  'PARAMETER_SET',
+  'PARAMETER_NOT_SET',
+]).enum;