docs(nav): add Reports → Purchasing routes

Pages-and-Navigation.md

@@ -1,7 +1,7 @@
 # Pages and Navigation
 
 The left sidebar adapts to the signed-in user's role and is organised into
-**Purchasing** and **Administration** sections (with an Inventory group when the
+**Purchasing**, **Reports**, and **Administration** sections (with an Inventory group when the
 inventory flag is on). Routes below map to files under `app/(portal)/`.
 
 ## Sidebar (role-aware)
@@ -49,6 +49,8 @@ SuperUser Requests /admin/superuser-requests ← ADMIN
 | `/payments` | Payment Queue | MGR_APPROVED & SENT_FOR_PAYMENT cards; send/mark paid; partial |
 | `/payments/history` | Payment History | Completed payments (ACCOUNTS, MANAGER) |
 | `/history` | History & Export | All POs; filter by date/cost centre/multiple statuses; CSV/PDF. `export_reports` holders, plus submitters when the `SUBMITTER_VIEW_ALL` flag is on |
+| `/reports/cost-centres` | Reports → Cost Centres | Approved spend compared across cost centres (vessels); drill to a cost-centre report. `view_analytics` |
+| `/reports/accounting-codes` | Reports → Accounting Codes | Approved spend by the accounting-code tree (drill headings → sub → leaf); leaf opens its report. `view_analytics` |
 | `/inventory/items` | Items (read-only) | Catalogue; expand for per-vendor prices; Cheapest/★Closest tags |
 | `/inventory/items/[id]` | Item Detail | Price comparison, site-distance sort, stock by site |
 | `/inventory/vendors` | Vendors | List with verified/active badges |
@@ -88,4 +90,4 @@ Which buttons appear is computed from PO status × role (via
   with a Sign-out button.
 
 The design-system tokens (colours, typography, component conventions) are in
-`Docs/01-design-document.md` §7.
+`Docs/01-design-document.md` §7.