Adopt the shared v2 Toaster from the auth branch

Replace the minimal placeholder Toaster with the richer implementation
already built on compliance-portal-auth (per-type icons plus warning and
info variants, and its stories). Both branches now share the exact same
component and app-root wiring, so they converge instead of colliding
when they merge. Align App.tsx provider ordering to match.

Signed-off-by: Émile Ré <emile@probo.com>

apps/compliance-portal/src/App.tsx

@@ -27,11 +27,11 @@ import { router } from "#/routes";
 
 export function App() {
   return (
-    <RelayProvider>
-      <Toast.Provider>
+    <Toast.Provider>
+      <RelayProvider>
         <RouterProvider router={router} />
-        <Toaster />
-      </Toast.Provider>
-    </RelayProvider>
+      </RelayProvider>
+      <Toaster />
+    </Toast.Provider>
   );
 }

packages/ui/src/v2/Toaster/Toaster.stories.tsx

@@ -0,0 +1,94 @@
+// Copyright (c) 2026 Probo Inc <hello@probo.com>.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+import { Toast } from "@base-ui/react/toast";
+
+import { Button } from "../Button/Button";
+
+import { Toaster } from "./Toaster";
+
+export default {
+  title: "v2/Toaster",
+  component: Toaster,
+};
+
+const types = ["neutral", "success", "error", "warning", "info"] as const;
+
+const titles: Record<(typeof types)[number], string> = {
+  neutral: "Saved",
+  success: "Access requested",
+  error: "Something went wrong",
+  warning: "Session expiring",
+  info: "New update available",
+};
+
+const descriptions: Record<(typeof types)[number], string> = {
+  neutral: "Your changes have been saved.",
+  success: "We'll email you once it's approved.",
+  error: "Please try again in a moment.",
+  warning: "Your session expires in 5 minutes.",
+  info: "A subprocessor list was published.",
+};
+
+function ToasterDemo({ withDescription = false }: { withDescription?: boolean }) {
+  const toast = Toast.useToastManager();
+
+  return (
+    <div className="flex flex-wrap gap-2">
+      {types.map(type => (
+        <Button
+          key={type}
+          variant="soft"
+          color="neutral"
+          highContrast
+          onClick={() =>
+            toast.add({
+              title: titles[type],
+              description: withDescription ? descriptions[type] : undefined,
+              type,
+            })}
+        >
+          {type}
+        </Button>
+      ))}
+      <Toaster />
+    </div>
+  );
+}
+
+// Title-only toasts (the common case — most app mutations toast a single line).
+// The Toaster reads Base UI's toast manager, so it must be wrapped in a
+// `Toast.Provider` (mounted once at the app root in real usage).
+export function Default() {
+  return (
+    <Toast.Provider>
+      <ToasterDemo />
+    </Toast.Provider>
+  );
+}
+
+// Toasts carrying a supporting description line under the title.
+export function WithDescription() {
+  return (
+    <Toast.Provider>
+      <ToasterDemo withDescription />
+    </Toast.Provider>
+  );
+}

packages/ui/src/v2/Toaster/Toaster.tsx

@@ -19,18 +19,37 @@
 // SOFTWARE.
 
 import { Toast } from "@base-ui/react/toast";
-import { XIcon } from "@phosphor-icons/react";
+import {
+  CheckCircleIcon,
+  InfoIcon,
+  WarningCircleIcon,
+  WarningIcon,
+  XIcon,
+} from "@phosphor-icons/react";
+import type { ReactNode } from "react";
 
 import { toaster } from "./variants";
 
-type ToastType = "success" | "error" | "neutral";
+type ToastType = "neutral" | "success" | "error" | "warning" | "info";
 
 function resolveType(type: string | undefined): ToastType {
-  return type === "success" || type === "error" ? type : "neutral";
+  if (type === "success" || type === "error" || type === "warning" || type === "info") {
+    return type;
+  }
+  return "neutral";
 }
 
-// Renders the active toasts from the Base UI toast manager. Mount once at the
-// app root, inside a `<Toast.Provider>`.
+const typeIcons: Record<ToastType, ReactNode> = {
+  neutral: <InfoIcon weight="fill" />,
+  success: <CheckCircleIcon weight="fill" />,
+  error: <WarningCircleIcon weight="fill" />,
+  warning: <WarningIcon weight="fill" />,
+  info: <InfoIcon weight="fill" />,
+};
+
+// Styled Base UI toast viewport. Mount once at the app root inside a
+// `Toast.Provider`; queue toasts through `Toast.useToastManager()`. See
+// contrib/claude/ui.md.
 export function Toaster() {
   const { toasts } = Toast.useToastManager();
   const slots = toaster();
@@ -39,15 +58,21 @@ export function Toaster() {
     <Toast.Portal>
       <Toast.Viewport className={slots.viewport()}>
         {toasts.map((toast) => {
-          const variant = { type: resolveType(toast.type) };
+          const type = resolveType(toast.type);
+          const typed = toaster({ type });
 
           return (
-            <Toast.Root key={toast.id} toast={toast} className={slots.toast(variant)}>
-              <div className={slots.content()}>
-                <Toast.Title className={slots.title(variant)} />
-                <Toast.Description className={slots.description()} />
+            <Toast.Root key={toast.id} toast={toast} className={typed.root()}>
+              <span aria-hidden className={typed.icon()}>
+                {typeIcons[type]}
+              </span>
+              <div className={typed.content()}>
+                <Toast.Title className={typed.title()} />
+                {toast.description != null && (
+                  <Toast.Description className={typed.description()} />
+                )}
               </div>
-              <Toast.Close className={slots.close()} aria-label="Close">
+              <Toast.Close className={typed.close()} aria-label="Close">
                 <XIcon />
               </Toast.Close>
             </Toast.Root>

packages/ui/src/v2/Toaster/variants.ts

@@ -20,30 +20,47 @@
 
 import { tv } from "tailwind-variants/lite";
 
-// Toaster (Radix "Toast" over Base UI's Toast). A bottom-right stack of
-// dismissible notifications, colored by type.
-
+// Styled Base UI toast. Each toast is an elevated card that reuses Callout's
+// `surface` hue language (tinted background + hue border, icon and body in the
+// hue text step, title one step higher for contrast) so toasts and callouts
+// read as one family. Meaning is carried by the icon too, not color alone.
 export const toaster = tv({
   slots: {
-    viewport: "fixed right-4 bottom-4 z-50 flex w-full max-w-sm flex-col gap-2 outline-none",
-    toast: [
-      "pointer-events-auto flex items-start gap-3 rounded-3 border border-sand-a6 bg-sand-1 p-3 shadow-3",
-      "transition-all duration-200 ease-out",
-      "data-starting-style:translate-x-4 data-starting-style:opacity-0",
-      "data-ending-style:translate-x-4 data-ending-style:opacity-0",
+    viewport: [
+      "fixed bottom-0 right-0 z-60 flex w-[380px] max-w-[calc(100vw-2rem)] flex-col gap-2 p-4",
+      "outline-none",
     ],
+    root: [
+      "flex items-start gap-3 rounded-4 border p-4 shadow-4",
+      "transition-all duration-150",
+      "data-starting-style:translate-y-2 data-starting-style:opacity-0",
+      "data-ending-style:translate-y-2 data-ending-style:opacity-0",
+    ],
+    // Icon and description inherit the root's hue text step (currentColor).
+    icon: "mt-px shrink-0 [&_svg]:size-5",
     content: "flex min-w-0 flex-1 flex-col gap-1",
-    title: "text-2 font-medium text-sand-12",
-    description: "text-2 break-words text-sand-11",
-    close: "flex size-5 shrink-0 items-center justify-center rounded-1 text-sand-a10 outline-none transition-colors hover:bg-sand-3 hover:text-sand-12 [&_svg]:size-4",
+    title: "text-2 font-medium",
+    description: "text-1",
+    close: "-mr-1 -mt-1 shrink-0 rounded-2 p-1 opacity-70 transition-opacity hover:opacity-100 [&_svg]:size-4",
   },
   variants: {
+    // Mirrors Callout's surface tokens: bg step 2, border step 6, text step 11,
+    // with the title bumped to step 12.
     type: {
-      success: { toast: "border-green-6 bg-green-2", title: "text-green-12" },
-      error: { toast: "border-red-6 bg-red-2", title: "text-red-12" },
       neutral: {},
+      success: {},
+      error: {},
+      warning: {},
+      info: {},
     },
   },
+  compoundVariants: [
+    { type: "neutral", class: { root: "bg-sand-2 border-sand-6 text-sand-11", title: "text-sand-12" } },
+    { type: "success", class: { root: "bg-green-2 border-green-6 text-green-11", title: "text-green-12" } },
+    { type: "error", class: { root: "bg-red-2 border-red-6 text-red-11", title: "text-red-12" } },
+    { type: "warning", class: { root: "bg-amber-2 border-amber-6 text-amber-11", title: "text-amber-12" } },
+    { type: "info", class: { root: "bg-sky-2 border-sky-6 text-sky-11", title: "text-sky-12" } },
+  ],
   defaultVariants: {
     type: "neutral",
   },