fix: useEffect anti-patterns, attendance permissions, and received-invoices schema mismatch

- Remove ref-mirror useEffect in AuthContext (cachedUserRef already written at mutation sites)
- Replace useEffect slide direction in ReceivedInvoices with render-time computation
- Fix Login.tsx useEffect dependency array (mount-only alert should have [] deps)
- Move "project created" alert to navigation source in ProjectCreate, remove useEffect in ProjectDetail
- Move companySettings defaults into fetch callbacks in InvoiceDetail and OfferDetail
- Replace due_date useEffect with useMemo in InvoiceDetail
- Capture initial snapshots from API data instead of useEffect in InvoiceDetail, OfferDetail, OrderDetail
- Replace localStorage draft useEffect with lazy useState initializer in OfferDetail
- Fix attendance dropdown to filter by attendance.record permission only
- Fix clock-out 404 on update-address (remove departure_time filter for departure action)
- Fix received-invoices stats endpoint referencing non-existent is_deleted and amount_czk columns

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/admin/pages/ProjectCreate.tsx

@@ -171,9 +171,8 @@ export default function ProjectCreate() {
       });
       const data = await res.json();
       if (data.success) {
-        navigate(`/projects/${data.data.id}`, {
-          state: { created: true },
-        });
+        alert.success("Projekt byl vytvořen");
+        navigate(`/projects/${data.data.id}`);
       } else {
         alert.error(data.error || "Nepodařilo se vytvořit projekt");
       }