Fix shipping + dashboard + analytics queries against new schema

The /admin/shipping page was 500-ing with 'column c.name does not
exist' because the getShippingOrders query in src/actions/shipping.ts
was still using legacy column names on the new-schema customers
table (name, email, phone) — the actual columns are first_name,
last_name, primary_email, primary_phone.

The dashboard and analytics pages were logging the same kind of
errors but catching them, so the UI just showed zeroed stats instead
of crashing. Same fix:

- customers: name → first_name || ' ' || last_name
- customers: email → primary_email
- customers: phone → primary_phone
- orders: subtotal → total_cents / 100
- orders: created_at → placed_at
- orders: customer_name → join customers and concat first/last

These are the same kind of fixes that landed in migration 0041 for
the command-center RPCs. The application-layer queries just hadn't
been updated.

src/actions/analytics.ts

@@ -284,7 +284,7 @@ export async function getRecentOrders(limit: number = 10): Promise<RecentOrder[]
     }>(
       `SELECT
          o.id::text AS id,
-         c.name AS customer_name,
+         TRIM(COALESCE(c.first_name, '') || ' ' || COALESCE(c.last_name, '')) AS customer_name,
          o.total_cents::float / 100.0 AS subtotal,
          o.status,
          o.placed_at::text AS created_at,