QoL tweaks: Cash Flow cards, auto-primary accounts, investment projections, Sankey filters

- Dashboard: Remove tenant name/role subtitle
- Cash Flow: Replace Operating/Reserve net cards with inflow vs outflow
  breakdown showing In/Out amounts and signed net; replace Ending Cash
  card with AI Financial Health status from saved recommendation
- Accounts: Auto-set first asset account per fund_type as primary on creation
- Investments: Add 5th summary card for projected annual interest earnings
- Sankey: Add Actuals/Budget/Forecast data source toggle and
  All Funds/Operating/Reserve fund filter SegmentedControls with
  backend support for budget-based and forecast (actuals+budget) queries

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

frontend/src/pages/dashboard/DashboardPage.tsx

@@ -53,12 +53,7 @@ export function DashboardPage() {
 
   return (
     <Stack data-tour="dashboard-content">
-      <div>
-        <Title order={2}>Dashboard</Title>
-        <Text c="dimmed" size="sm">
-          {currentOrg ? `${currentOrg.name} - ${currentOrg.role}` : 'No organization selected'}
-        </Text>
-      </div>
+      <Title order={2}>Dashboard</Title>
 
       {!currentOrg ? (
         <Card withBorder p="xl" ta="center">