Add unread notification badge and poll to dashboard layout

- Import onCleanup, getAuthHeader in DashboardLayout
- Poll /api/me/notifications every 60s for unread_count
- Show orange badge on bell icon when unread > 0

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/dashboard/DashboardLayout.tsx

@@ -1,6 +1,6 @@
-import { Component, Show, createEffect, For, createSignal, onMount } from 'solid-js';
+import { Component, Show, createEffect, For, createSignal, onMount, onCleanup } from 'solid-js';
 import { useNavigate, A, useSearchParams } from '@solidjs/router';
-import { authState, logout, switchRole, bootstrapAuth, setMockRuntimeConfig, isModuleLocked } from '~/lib/auth';
+import { authState, logout, switchRole, bootstrapAuth, setMockRuntimeConfig, isModuleLocked, getAuthHeader } from '~/lib/auth';
 import { shouldShowRoleSwitcher, getRoleLabel } from '~/lib/auth-flow';
 import {
   getRoleTourStorageKey,
@@ -340,6 +340,22 @@ export default function DashboardLayout(props: { children: any }) {
   const [tourKind, setTourKind] = createSignal<GuidedTourKind | null>(null);
   const [tourStepIndex, setTourStepIndex] = createSignal(0);
   const [authReady, setAuthReady] = createSignal(false);
+  const [unreadCount, setUnreadCount] = createSignal(0);
+
+  const API = import.meta.env.VITE_API_URL ?? 'http://localhost:8000';
+
+  async function fetchUnreadCount() {
+    const auth = getAuthHeader();
+    if (!auth.Authorization) return;
+    try {
+      const res = await fetch(`${API}/api/me/notifications?page=1&limit=1`, { headers: auth });
+      if (!res.ok) return;
+      const data = await res.json();
+      setUnreadCount(data.unread_count ?? 0);
+    } catch {
+      // ignore
+    }
+  }
 
   // Restore session or inject mock preview config
   onMount(async () => {
@@ -350,6 +366,10 @@ export default function DashboardLayout(props: { children: any }) {
       await bootstrapAuth();
     }
     setAuthReady(true);
+    // Poll for unread notification count every 60 seconds
+    await fetchUnreadCount();
+    const notifTimer = setInterval(fetchUnreadCount, 60_000);
+    onCleanup(() => clearInterval(notifTimer));
   });
 
   createEffect(() => {
@@ -580,8 +600,29 @@ export default function DashboardLayout(props: { children: any }) {
                 </A>
               </div>
             </Show>
-            <A href="/dashboard/notifications" class="topbar-icon-btn" title="Notifications">
+            <A href="/dashboard/notifications" class="topbar-icon-btn" title="Notifications" style={{ position: 'relative' }}>
               <IconBell />
+              <Show when={unreadCount() > 0}>
+                <span style={{
+                  position: 'absolute',
+                  top: '2px',
+                  right: '2px',
+                  'min-width': '16px',
+                  height: '16px',
+                  'border-radius': '999px',
+                  background: '#fd6116',
+                  color: '#fff',
+                  'font-size': '10px',
+                  'font-weight': '800',
+                  display: 'flex',
+                  'align-items': 'center',
+                  'justify-content': 'center',
+                  padding: '0 3px',
+                  'line-height': '1',
+                }}>
+                  {unreadCount() > 99 ? '99+' : unreadCount()}
+                </span>
+              </Show>
             </A>
             <div class="topbar-user">
               <span class="topbar-name">{rc()?.user?.full_name ?? 'User'}</span>