Fix: Financial overview branch filter was querying non-existent column

The revenue query filtered by invoice_items.branch_id which doesn't
exist, causing 0 results when a branch is selected. Use
payments.branch_id directly since payments already track their branch.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Livewire/Financial/FinancialOverview.php

@@ -128,15 +128,20 @@ private function getRevenue($from, $to): array
             ->whereBetween('payment_date', [$from, $to]);
 
         if ($this->branch_id) {
-            $query->whereHas('invoice', fn ($q) => $q->whereHas('items', fn ($iq) => $iq->where('branch_id', $this->branch_id)));
+            $query->where('branch_id', $this->branch_id);
         }
 
         $totalRevenue = $query->sum('amount');
 
-        $byMethod = Payment::where('direction', 'inbound')
+        $byMethodQuery = Payment::where('direction', 'inbound')
             ->where('status', 'confirmed')
-            ->whereBetween('payment_date', [$from, $to])
-            ->select('method', DB::raw('SUM(amount) as total'), DB::raw('COUNT(*) as count'))
+            ->whereBetween('payment_date', [$from, $to]);
+
+        if ($this->branch_id) {
+            $byMethodQuery->where('branch_id', $this->branch_id);
+        }
+
+        $byMethod = $byMethodQuery->select('method', DB::raw('SUM(amount) as total'), DB::raw('COUNT(*) as count'))
             ->groupBy('method')
             ->get();