feat(jsn-bridge): notifications payload + embedded-mode polish

Two additions on top of the existing JSN-bridge work — both surface
through to JSN's /account VolunteerHub without further coordination.

api/src/modules/volunteer-dashboard/volunteer-dashboard.service.ts:
- Add DashboardNotification interface (id, title, body?, kind?,
  createdAt, href?) and `notifications: DashboardNotification[]` on
  VolunteerDashboardPayload.
- getDashboard() now fans out an 8th parallel fetch to the existing
  notificationService.listNotifications(userId, 1, 20, true), mapping
  each row's metadata.href (if present) into the href field.
- JSN's NotificationsCard was shipped pre-emptively typed for this
  field (loose-schema-now); it lights up automatically once cmlite is
  redeployed with this commit.

admin/src/components/VolunteerLayout.tsx + VolunteerFooterNav.tsx:
- Suppress the "Welcome to the Volunteer Portal!" alert when
  ?layout=embedded — the supporter arriving via SSO already knows
  where they are; the alert is noise.
- Add a "← Back to JSN" link in the drawer cross-nav section, visible
  only when embedded. Reads VITE_JSN_HOME_URL (new env var, defaults
  to http://localhost:8085 for dev).
- Preserve ?layout=embedded across in-cmlite navigation. Both the
  drawer nav and the footer nav now route through a navigateInLayout
  helper that appends the query when the supporter arrived embedded.
  Without this fix, clicking the footer "Map" button (etc.) stripped
  the query and re-showed PublicNavBar + the welcome alert.

admin/src/vite-env.d.ts:
- New VITE_JSN_HOME_URL slot in ImportMetaEnv. Default dev value baked
  into VolunteerLayout's render; production overrides via .env.

Bunker Admin

admin/src/components/VolunteerFooterNav.tsx

@@ -1,5 +1,5 @@
 import { useMemo } from 'react';
-import { useNavigate, useLocation } from 'react-router-dom';
+import { useNavigate, useLocation, useSearchParams } from 'react-router-dom';
 import { theme } from 'antd';
 import {
   HomeOutlined,
@@ -32,8 +32,21 @@ interface VolunteerFooterNavProps {
 export default function VolunteerFooterNav({ style, onMenuOpen, menuActive = false }: VolunteerFooterNavProps) {
   const navigate = useNavigate();
   const location = useLocation();
+  const [searchParams] = useSearchParams();
   const { token } = theme.useToken();
   const { settings } = useSettingsStore();
+  // Preserve ?layout=embedded across in-cmlite footer nav so chrome stays
+  // hidden after the supporter clicks through from JSN. Matches the helper
+  // in VolunteerLayout's drawer nav.
+  const isEmbedded = searchParams.get('layout') === 'embedded';
+  const navigateInLayout = (to: string) => {
+    if (isEmbedded) {
+      const sep = to.includes('?') ? '&' : '?';
+      navigate(`${to}${sep}layout=embedded`);
+    } else {
+      navigate(to);
+    }
+  };
 
   const NAV_ITEMS = useMemo(() => {
     const items = [...BASE_NAV_ITEMS];
@@ -100,7 +113,7 @@ export default function VolunteerFooterNav({ style, onMenuOpen, menuActive = fal
         return (
           <div
             key={key}
-            onClick={() => navigate(key)}
+            onClick={() => navigateInLayout(key)}
             style={{
               display: 'flex',
               alignItems: 'center',

admin/src/components/VolunteerLayout.tsx

@@ -16,6 +16,7 @@ import {
   TeamOutlined,
   MessageOutlined,
   BarChartOutlined,
+  ArrowLeftOutlined,
 } from '@ant-design/icons';
 import { useAuthStore } from '@/stores/auth.store';
 import { useSettingsStore } from '@/stores/settings.store';
@@ -53,6 +54,21 @@ export default function VolunteerLayout() {
     navigate('/login', { replace: true });
   };
 
+  // Navigate while preserving the ?layout=embedded query so chrome stays
+  // hidden as the supporter moves through cmlite. Without this, clicking any
+  // drawer/footer-nav link would strip the param and re-show PublicNavBar +
+  // the welcome alert on the next page.
+  const navigateInLayout = (to: string) => {
+    if (isEmbedded) {
+      const sep = to.includes('?') ? '&' : '?';
+      navigate(`${to}${sep}layout=embedded`);
+    } else {
+      navigate(to);
+    }
+  };
+
+  const jsnHomeUrl = import.meta.env.VITE_JSN_HOME_URL ?? 'http://localhost:8085';
+
   // Build nav items list (mirrors VolunteerFooterNav logic)
   const navItems = useMemo(() => {
     const items: { key: string; icon: React.ReactNode; label: string }[] = [
@@ -115,7 +131,7 @@ export default function VolunteerLayout() {
             padding: '16px 12px max(60px, calc(44px + 16px + env(safe-area-inset-bottom))) 12px',
           }}
         >
-          {!welcomeDismissed && (
+          {!isEmbedded && !welcomeDismissed && (
             <Alert
               message="Welcome to the Volunteer Portal!"
               description="Here you can view your shifts, canvass your area, track your activity, and connect with your team."
@@ -196,7 +212,7 @@ export default function VolunteerLayout() {
             return (
               <div
                 key={key}
-                onClick={() => { navigate(key); setMenuOpen(false); }}
+                onClick={() => { navigateInLayout(key); setMenuOpen(false); }}
                 style={{
                   display: 'flex',
                   alignItems: 'center',
@@ -222,8 +238,28 @@ export default function VolunteerLayout() {
 
         {/* Cross-navigation links */}
         <div style={{ padding: '4px 0' }}>
+          {isEmbedded && (
+            <a
+              href={jsnHomeUrl}
+              onClick={() => setMenuOpen(false)}
+              style={{
+                display: 'flex',
+                alignItems: 'center',
+                gap: 12,
+                padding: '12px 20px',
+                cursor: 'pointer',
+                color: 'rgba(255,255,255,0.85)',
+                fontSize: 14,
+                fontWeight: 500,
+                textDecoration: 'none',
+              }}
+            >
+              <ArrowLeftOutlined />
+              <span>Back to JSN</span>
+            </a>
+          )}
           <div
-            onClick={() => { navigate('/home'); setMenuOpen(false); }}
+            onClick={() => { navigateInLayout('/home'); setMenuOpen(false); }}
             style={{
               display: 'flex',
               alignItems: 'center',
@@ -239,7 +275,7 @@ export default function VolunteerLayout() {
           </div>
           {isAdmin && (
             <div
-              onClick={() => { navigate('/app'); setMenuOpen(false); }}
+              onClick={() => { navigateInLayout('/app'); setMenuOpen(false); }}
               style={{
                 display: 'flex',
                 alignItems: 'center',

admin/src/vite-env.d.ts

@@ -6,6 +6,11 @@ interface ImportMetaEnv {
   readonly VITE_MKDOCS_URL?: string;
   readonly VITE_DOMAIN?: string;
   readonly VITE_MKDOCS_SITE_PORT?: string;
+  // Home URL for the upstream "Just Say No" supporter site. Used by
+  // VolunteerLayout's "← Back to JSN" link in embedded mode. Defaults to
+  // http://localhost:8085 in dev; production deploys set this to the public
+  // JSN host (e.g. https://justsaynoab.ca).
+  readonly VITE_JSN_HOME_URL?: string;
 }
 
 interface ImportMeta {

api/src/modules/volunteer-dashboard/volunteer-dashboard.service.ts

@@ -3,6 +3,7 @@ import { prisma } from '../../config/database';
 import { env } from '../../config/env';
 import { actionCampaignsService, type ActiveCampaignForUser } from '../action-campaigns/action-campaigns.service';
 import { referralService } from '../social/referral.service';
+import { notificationService } from '../social/notification.service';
 
 export interface DashboardProfile {
   id: string;
@@ -67,6 +68,19 @@ export interface DashboardResource {
   viewPath: string | null;
 }
 
+// Unread-notification summary surfaced to bridged callers (JSN's VolunteerHub
+// renders this as a "N unread" badge + top-3 titles + "View all →"). Field
+// shape is intentionally minimal: callers don't need the full Notification
+// row, just enough to render a list + open the source on click.
+export interface DashboardNotification {
+  id: string;
+  title: string;
+  body?: string;
+  kind?: string;
+  createdAt: string;
+  href?: string;
+}
+
 export interface VolunteerDashboardPayload {
   profile: DashboardProfile;
   referral: DashboardReferral;
@@ -76,6 +90,7 @@ export interface VolunteerDashboardPayload {
   myEvents: DashboardMyEvent[];
   points: DashboardPoints;
   resources: DashboardResource[];
+  notifications: DashboardNotification[];
 }
 
 const RESOURCE_TAG = 'volunteer-resource';
@@ -311,20 +326,54 @@ async function getResources(): Promise<DashboardResource[]> {
   return items.slice(0, 8).map(({ sortKey: _sortKey, ...rest }) => rest);
 }
 
+// Map Prisma Notification row → DashboardNotification. id is coerced to
+// string (Prisma uses int autoincrement; JSN renders it as a React key so
+// string is friendlier across the bridge). `metadata.href` is the per-row
+// deep-link cmlite owns; missing values are fine.
+function toDashboardNotification(n: {
+  id: number;
+  type: string;
+  title: string;
+  message: string;
+  metadata: Prisma.JsonValue;
+  createdAt: Date;
+}): DashboardNotification {
+  let href: string | undefined;
+  if (n.metadata && typeof n.metadata === 'object' && !Array.isArray(n.metadata)) {
+    const raw = (n.metadata as Record<string, unknown>).href;
+    if (typeof raw === 'string') href = raw;
+  }
+  return {
+    id: String(n.id),
+    title: n.title,
+    body: n.message,
+    kind: n.type,
+    createdAt: n.createdAt.toISOString(),
+    href,
+  };
+}
+
+async function getNotifications(userId: string): Promise<DashboardNotification[]> {
+  const result = await notificationService.listNotifications(userId, 1, 20, true);
+  return result.notifications.map(toDashboardNotification);
+}
+
 export const volunteerDashboardService = {
   async getDashboard(userId: string): Promise<VolunteerDashboardPayload | null> {
     const profile = await getProfile(userId);
     if (!profile) return null;
 
-    const [referral, actionCampaign, featuredEvent, trainings, myEvents, points, resources] = await Promise.all([
-      getReferral(userId),
-      actionCampaignsService.getActiveForUser(userId),
-      getFeaturedEvent(),
-      getTrainings(userId),
-      getMyEvents(userId),
-      getPoints(userId),
-      getResources(),
-    ]);
+    const [referral, actionCampaign, featuredEvent, trainings, myEvents, points, resources, notifications] =
+      await Promise.all([
+        getReferral(userId),
+        actionCampaignsService.getActiveForUser(userId),
+        getFeaturedEvent(),
+        getTrainings(userId),
+        getMyEvents(userId),
+        getPoints(userId),
+        getResources(),
+        getNotifications(userId),
+      ]);
 
     return {
       profile,
@@ -335,6 +384,7 @@ export const volunteerDashboardService = {
       myEvents,
       points,
       resources,
+      notifications,
     };
   },
 };