feat: add admin ideas management page with private notes

Adds a dedicated super admin page for managing idea submissions across
all tenants. Includes status summary cards, filterable/searchable table,
detail modal with status updates, and private admin notes for internal
tracking (sprint refs, thoughts, follow-ups). Notes are not visible to
tenant users.

- Database: admin_note column on shared.ideas (019 migration)
- Backend: PUT /admin/ideas/:id/note endpoint
- Frontend: AdminIdeasPage with table, filters, detail modal
- Sidebar: "Idea Submissions" nav link in admin sections
- Routing: /admin/ideas route under SuperAdminRoute guard

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

frontend/src/App.tsx

@@ -29,6 +29,7 @@ import { SettingsPage } from './pages/settings/SettingsPage';
 import { UserPreferencesPage } from './pages/preferences/UserPreferencesPage';
 import { OrgMembersPage } from './pages/org-members/OrgMembersPage';
 import { AdminPage } from './pages/admin/AdminPage';
+import { AdminIdeasPage } from './pages/admin/AdminIdeasPage';
 import { AssessmentGroupsPage } from './pages/assessment-groups/AssessmentGroupsPage';
 import { CashFlowForecastPage } from './pages/cash-flow/CashFlowForecastPage';
 import { MonthlyActualsPage } from './pages/monthly-actuals/MonthlyActualsPage';
@@ -133,6 +134,7 @@ export function App() {
         }
       >
         <Route index element={<AdminPage />} />
+        <Route path="ideas" element={<AdminIdeasPage />} />
       </Route>
 
       {/* Main app routes (require auth + org) */}

frontend/src/components/layout/Sidebar.tsx

@@ -20,6 +20,7 @@ import {
   IconCalculator,
   IconGitCompare,
   IconScale,
+  IconBulb,
 } from '@tabler/icons-react';
 import { useAuthStore } from '../../stores/authStore';
 
@@ -132,6 +133,13 @@ export function Sidebar({ onNavigate }: SidebarProps) {
           onClick={() => go('/admin')}
           color="red"
         />
+        <NavLink
+          label="Idea Submissions"
+          leftSection={<IconBulb size={18} />}
+          active={location.pathname === '/admin/ideas'}
+          onClick={() => go('/admin/ideas')}
+          color="yellow"
+        />
         {organizations && organizations.length > 0 && (
           <>
             <Divider my="sm" />
@@ -230,6 +238,13 @@ export function Sidebar({ onNavigate }: SidebarProps) {
             onClick={() => go('/admin')}
             color="red"
           />
+          <NavLink
+            label="Idea Submissions"
+            leftSection={<IconBulb size={18} />}
+            active={location.pathname === '/admin/ideas'}
+            onClick={() => go('/admin/ideas')}
+            color="yellow"
+          />
         </>
       )}
     </ScrollArea>

frontend/src/pages/admin/AdminIdeasPage.tsx

@@ -0,0 +1,308 @@
+import { useState } from 'react';
+import {
+  Title, Text, Card, Table, Group, Stack, Badge, Loader, Center,
+  Select, TextInput, Textarea, Button, Modal, SimpleGrid, ActionIcon,
+  Tooltip, Paper,
+} from '@mantine/core';
+import { useDisclosure } from '@mantine/hooks';
+import { notifications } from '@mantine/notifications';
+import {
+  IconBulb, IconSearch, IconNote, IconFilter,
+} from '@tabler/icons-react';
+import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import api from '../../services/api';
+
+interface AdminIdea {
+  id: string;
+  title: string;
+  description: string | null;
+  status: string;
+  createdAt: string;
+  adminNote: string | null;
+  orgId: string;
+  orgName: string;
+  userId: string;
+  userEmail: string;
+  userFirstName: string;
+  userLastName: string;
+}
+
+const statusColor: Record<string, string> = {
+  new: 'blue',
+  reviewed: 'yellow',
+  accepted: 'green',
+  rejected: 'red',
+};
+
+const statusOptions = [
+  { value: 'new', label: 'New' },
+  { value: 'reviewed', label: 'Reviewed' },
+  { value: 'accepted', label: 'Accepted' },
+  { value: 'rejected', label: 'Rejected' },
+];
+
+function formatDate(dateStr: string | null | undefined): string {
+  if (!dateStr) return '—';
+  return new Date(dateStr).toLocaleDateString();
+}
+
+function formatDateTime(dateStr: string | null | undefined): string {
+  if (!dateStr) return '—';
+  return new Date(dateStr).toLocaleString();
+}
+
+export function AdminIdeasPage() {
+  const [search, setSearch] = useState('');
+  const [statusFilter, setStatusFilter] = useState<string | null>(null);
+  const [selectedIdea, setSelectedIdea] = useState<AdminIdea | null>(null);
+  const [detailOpened, { open: openDetail, close: closeDetail }] = useDisclosure(false);
+  const [noteText, setNoteText] = useState('');
+  const queryClient = useQueryClient();
+
+  const { data: ideas, isLoading } = useQuery<AdminIdea[]>({
+    queryKey: ['admin-ideas'],
+    queryFn: async () => { const { data } = await api.get('/admin/ideas'); return data; },
+  });
+
+  const updateStatus = useMutation({
+    mutationFn: async ({ id, status }: { id: string; status: string }) => {
+      await api.put(`/admin/ideas/${id}/status`, { status });
+    },
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['admin-ideas'] });
+      notifications.show({ message: 'Status updated', color: 'green' });
+    },
+  });
+
+  const updateNote = useMutation({
+    mutationFn: async ({ id, adminNote }: { id: string; adminNote: string }) => {
+      await api.put(`/admin/ideas/${id}/note`, { adminNote });
+    },
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['admin-ideas'] });
+      notifications.show({ message: 'Note saved', color: 'green' });
+    },
+  });
+
+  const openIdeaDetail = (idea: AdminIdea) => {
+    setSelectedIdea(idea);
+    setNoteText(idea.adminNote || '');
+    openDetail();
+  };
+
+  const handleSaveNote = () => {
+    if (selectedIdea) {
+      updateNote.mutate({ id: selectedIdea.id, adminNote: noteText });
+    }
+  };
+
+  const filtered = (ideas || []).filter((idea) => {
+    const matchesSearch = !search ||
+      idea.title.toLowerCase().includes(search.toLowerCase()) ||
+      idea.description?.toLowerCase().includes(search.toLowerCase()) ||
+      idea.orgName.toLowerCase().includes(search.toLowerCase()) ||
+      idea.userEmail.toLowerCase().includes(search.toLowerCase());
+    const matchesStatus = !statusFilter || idea.status === statusFilter;
+    return matchesSearch && matchesStatus;
+  });
+
+  const counts = {
+    total: ideas?.length || 0,
+    new: ideas?.filter(i => i.status === 'new').length || 0,
+    reviewed: ideas?.filter(i => i.status === 'reviewed').length || 0,
+    accepted: ideas?.filter(i => i.status === 'accepted').length || 0,
+    rejected: ideas?.filter(i => i.status === 'rejected').length || 0,
+  };
+
+  if (isLoading) {
+    return <Center h={400}><Loader /></Center>;
+  }
+
+  return (
+    <Stack>
+      <Group justify="space-between">
+        <Group>
+          <IconBulb size={28} />
+          <Title order={2}>Idea Submissions</Title>
+        </Group>
+        <Badge size="lg" variant="light">{counts.total} total</Badge>
+      </Group>
+
+      {/* Summary cards */}
+      <SimpleGrid cols={{ base: 2, sm: 4 }}>
+        <Paper withBorder p="md" radius="md">
+          <Text size="xs" c="dimmed" tt="uppercase" fw={700}>New</Text>
+          <Text size="xl" fw={700} c="blue">{counts.new}</Text>
+        </Paper>
+        <Paper withBorder p="md" radius="md">
+          <Text size="xs" c="dimmed" tt="uppercase" fw={700}>Reviewed</Text>
+          <Text size="xl" fw={700} c="yellow">{counts.reviewed}</Text>
+        </Paper>
+        <Paper withBorder p="md" radius="md">
+          <Text size="xs" c="dimmed" tt="uppercase" fw={700}>Accepted</Text>
+          <Text size="xl" fw={700} c="green">{counts.accepted}</Text>
+        </Paper>
+        <Paper withBorder p="md" radius="md">
+          <Text size="xs" c="dimmed" tt="uppercase" fw={700}>Rejected</Text>
+          <Text size="xl" fw={700} c="red">{counts.rejected}</Text>
+        </Paper>
+      </SimpleGrid>
+
+      {/* Filters */}
+      <Group>
+        <TextInput
+          placeholder="Search ideas, tenants, users..."
+          leftSection={<IconSearch size={16} />}
+          value={search}
+          onChange={(e) => setSearch(e.currentTarget.value)}
+          style={{ flex: 1 }}
+        />
+        <Select
+          placeholder="All statuses"
+          leftSection={<IconFilter size={16} />}
+          data={statusOptions}
+          value={statusFilter}
+          onChange={setStatusFilter}
+          clearable
+          w={160}
+        />
+      </Group>
+
+      {/* Ideas table */}
+      <Card withBorder p={0}>
+        <Table striped highlightOnHover>
+          <Table.Thead>
+            <Table.Tr>
+              <Table.Th>Date</Table.Th>
+              <Table.Th>Tenant</Table.Th>
+              <Table.Th>Submitted By</Table.Th>
+              <Table.Th>Title</Table.Th>
+              <Table.Th>Status</Table.Th>
+              <Table.Th w={40}></Table.Th>
+            </Table.Tr>
+          </Table.Thead>
+          <Table.Tbody>
+            {filtered.length === 0 ? (
+              <Table.Tr>
+                <Table.Td colSpan={6}>
+                  <Text ta="center" c="dimmed" py="lg">
+                    {ideas?.length === 0 ? 'No ideas submitted yet' : 'No ideas match your filters'}
+                  </Text>
+                </Table.Td>
+              </Table.Tr>
+            ) : (
+              filtered.map((idea) => (
+                <Table.Tr
+                  key={idea.id}
+                  style={{ cursor: 'pointer' }}
+                  onClick={() => openIdeaDetail(idea)}
+                >
+                  <Table.Td>
+                    <Text size="xs">{formatDate(idea.createdAt)}</Text>
+                  </Table.Td>
+                  <Table.Td>
+                    <Text size="sm" fw={500}>{idea.orgName}</Text>
+                  </Table.Td>
+                  <Table.Td>
+                    <Text size="sm">{idea.userFirstName} {idea.userLastName}</Text>
+                    <Text size="xs" c="dimmed">{idea.userEmail}</Text>
+                  </Table.Td>
+                  <Table.Td>
+                    <Text size="sm" fw={500} lineClamp={1}>{idea.title}</Text>
+                  </Table.Td>
+                  <Table.Td>
+                    <Badge size="sm" variant="light" color={statusColor[idea.status]}>
+                      {idea.status}
+                    </Badge>
+                  </Table.Td>
+                  <Table.Td>
+                    {idea.adminNote && (
+                      <Tooltip label="Has admin note">
+                        <IconNote size={16} color="gray" />
+                      </Tooltip>
+                    )}
+                  </Table.Td>
+                </Table.Tr>
+              ))
+            )}
+          </Table.Tbody>
+        </Table>
+      </Card>
+
+      {/* Detail Modal */}
+      <Modal
+        opened={detailOpened}
+        onClose={closeDetail}
+        title={<Text fw={600}>Idea Detail</Text>}
+        size="lg"
+      >
+        {selectedIdea && (
+          <Stack>
+            <Card withBorder>
+              <SimpleGrid cols={2} spacing="xs">
+                <Text size="xs" c="dimmed">Tenant</Text>
+                <Text size="sm" fw={500}>{selectedIdea.orgName}</Text>
+                <Text size="xs" c="dimmed">Submitted By</Text>
+                <Text size="sm">{selectedIdea.userFirstName} {selectedIdea.userLastName} ({selectedIdea.userEmail})</Text>
+                <Text size="xs" c="dimmed">Date</Text>
+                <Text size="sm">{formatDateTime(selectedIdea.createdAt)}</Text>
+              </SimpleGrid>
+            </Card>
+
+            <Card withBorder>
+              <Text fw={600} mb="xs">Title</Text>
+              <Text size="sm">{selectedIdea.title}</Text>
+              {selectedIdea.description && (
+                <>
+                  <Text fw={600} mt="md" mb="xs">Description</Text>
+                  <Text size="sm" style={{ whiteSpace: 'pre-wrap' }}>{selectedIdea.description}</Text>
+                </>
+              )}
+            </Card>
+
+            <Card withBorder>
+              <Text fw={600} mb="xs">Status</Text>
+              <Select
+                data={statusOptions}
+                value={selectedIdea.status}
+                onChange={(val) => {
+                  if (val && val !== selectedIdea.status) {
+                    updateStatus.mutate({ id: selectedIdea.id, status: val }, {
+                      onSuccess: () => {
+                        setSelectedIdea({ ...selectedIdea, status: val });
+                      },
+                    });
+                  }
+                }}
+                w={200}
+              />
+            </Card>
+
+            <Card withBorder>
+              <Group justify="space-between" mb="xs">
+                <Text fw={600}>Private Admin Note</Text>
+                <Text size="xs" c="dimmed">Only visible to super admins</Text>
+              </Group>
+              <Textarea
+                placeholder="Add internal notes — sprint reference, thoughts, follow-up actions..."
+                minRows={3}
+                value={noteText}
+                onChange={(e) => setNoteText(e.currentTarget.value)}
+              />
+              <Button
+                size="xs"
+                variant="light"
+                mt="xs"
+                onClick={handleSaveNote}
+                loading={updateNote.isPending}
+                disabled={noteText === (selectedIdea.adminNote || '')}
+              >
+                Save Note
+              </Button>
+            </Card>
+          </Stack>
+        )}
+      </Modal>
+    </Stack>
+  );
+}