fix(reconciliation): drive bank avstämning period from the report header (#771) (#774)

The bank reconciliation view hosted its OWN FiscalYearSelector inside the
action bar — but that bar renders below the loading-skeleton early-return, so
the selector never mounted, its onReady/onChange never fired, the periodReady
gate never flipped, and the page hung on a permanent skeleton (#771).

Make the report period-scoped like the ledgers: lib/reports/catalog.ts marks
bank-reconciliation `params: 'fiscal'`, so the report page's räkenskapsår
selector owns the period. FocusedReport passes periodId + periodBounds down,
and BankReconciliationView takes them as props instead of self-selecting. The
window seeds from periodBounds and a periodId-keyed effect re-seeds (and writes
dateFromRef/dateToRef synchronously) on a year switch, preserving the #751
period-scoped IB-floor behaviour without the deadlock. Manual date edits still
apply on demand via "Filtrera".

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lib/reports/catalog.ts

@@ -236,7 +236,12 @@ export const REPORT_CATALOG: ReportDescriptor[] = [
     labelKey: 'name_bank_reconciliation',
     descKey: 'desc_bank_reconciliation',
     category: 'reconciliation',
-    params: 'none',
+    // Period-scoped like the ledgers: the report page's räkenskapsår selector
+    // drives the reconciliation window (issue #751). Was 'none' (periodless),
+    // which left the view to host its OWN fiscal-year selector inside a
+    // loading-gated action bar — a render deadlock that hung the page on a
+    // permanent skeleton (#771).
+    params: 'fiscal',
   },
 
   // --- Export & arkiv — library-only ---