feat: 판매대장 하단에 용량별·품목별 통계 표시

- 현재 필터(기간·판매소·대행소·카테고리·크기) 적용 결과 기준 집계
- 용량별(리터별): 크기 오름차순, 판매량·판매금액 합계
- 품목별: 봉투/음식물/폐기물 3분류, 판매량·판매금액 합계

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/Controllers/Admin/SalesReport.php

@@ -141,6 +141,10 @@ class SalesReport extends BaseController
             }
         }
 
+        // 하단 통계: 현재 필터(카테고리·크기)까지 적용된 결과 기준으로
+        // ① 용량별(리터별) ② 품목별(봉투/음식물/폐기물) 집계
+        [$sizeStats, $catStats] = $this->buildLedgerBottomStats($filtered, $sizeOf);
+
         if ($mode === 'daily') {
             $built = $this->buildDailyLedgerPresentation($filtered, $hasBsFee);
         } else {
@@ -235,6 +239,8 @@ class SalesReport extends BaseController
             'cats'              => $cats,
             'sizeGroups'        => $sizeGroups,
             'size'              => $size,
+            'sizeStats'         => $sizeStats,
+            'catStats'          => $catStats,
             'shops'             => $shops,
             'agencies'          => $agencies,
             'lgName'            => $lgName,
@@ -286,6 +292,68 @@ class SalesReport extends BaseController
         return $builder->get()->getResult();
     }
 
+    /**
+     * 판매대장 하단 통계: 용량별(리터별)·품목별(봉투/음식물/폐기물) 집계.
+     *
+     * @param list<object> $rows   필터가 적용된 상세 판매행
+     * @param callable      $sizeOf 품목명 → 크기 토큰(예: '10L', '1000원', '')
+     * @return array{0: list<array{label:string,qty:int,amount:int}>, 1: list<array{label:string,qty:int,amount:int}>}
+     */
+    private function buildLedgerBottomStats(array $rows, callable $sizeOf): array
+    {
+        $bySize = []; // 크기토큰 => [qty, amount]
+        $byCat  = []; // '봉투'|'음식물'|'폐기물' => [qty, amount]
+
+        foreach ($rows as $row) {
+            $name = (string) ($row->bs_bag_name ?? '');
+            $qty  = (int) ($row->line_qty ?? 0);
+            $amt  = (float) ($row->line_amount ?? 0);
+
+            // ① 용량별(리터별) — 크기 토큰이 없으면 '기타'
+            $sz = (string) $sizeOf($name);
+            if ($sz === '') {
+                $sz = '기타';
+            }
+            $bySize[$sz]['qty']    = ($bySize[$sz]['qty'] ?? 0) + $qty;
+            $bySize[$sz]['amount'] = ($bySize[$sz]['amount'] ?? 0) + $amt;
+
+            // ② 품목별 — 봉투/음식물/폐기물 3분류
+            if (mb_strpos($name, '음식물') !== false) {
+                $cat = '음식물';
+            } elseif (mb_strpos($name, '폐기물') !== false || mb_strpos($name, '대형') !== false) {
+                $cat = '폐기물';
+            } else {
+                $cat = '봉투';
+            }
+            $byCat[$cat]['qty']    = ($byCat[$cat]['qty'] ?? 0) + $qty;
+            $byCat[$cat]['amount'] = ($byCat[$cat]['amount'] ?? 0) + $amt;
+        }
+
+        // 용량별: 숫자(리터/금액) 오름차순, '기타'는 맨 뒤
+        $sizeStats = [];
+        foreach ($bySize as $label => $v) {
+            $sizeStats[] = ['label' => (string) $label, 'qty' => (int) $v['qty'], 'amount' => (int) round($v['amount'])];
+        }
+        usort($sizeStats, static function (array $a, array $b): int {
+            $ao = $a['label'] === '기타' ? 1 : 0;
+            $bo = $b['label'] === '기타' ? 1 : 0;
+            if ($ao !== $bo) {
+                return $ao <=> $bo;
+            }
+            return (int) preg_replace('/\D/', '', $a['label']) <=> (int) preg_replace('/\D/', '', $b['label']);
+        });
+
+        // 품목별: 봉투 → 음식물 → 폐기물 고정 순서
+        $catStats = [];
+        foreach (['봉투', '음식물', '폐기물'] as $c) {
+            if (isset($byCat[$c])) {
+                $catStats[] = ['label' => $c, 'qty' => (int) $byCat[$c]['qty'], 'amount' => (int) round($byCat[$c]['amount'])];
+            }
+        }
+
+        return [$sizeStats, $catStats];
+    }
+
     /**
      * @param list<string> $cats 빈 배열이면 전체
      */

app/Views/admin/sales_report/sales_ledger.php

@@ -250,6 +250,80 @@ $excelUrl = mgmt_url('reports/sales-ledger?' . http_build_query($exportParams));
     </table>
   </div>
   <p class="text-sm text-gray-700 mt-2 mb-0 no-print">판매건수(상세 행): <?= number_format((int) ($saleLineCount ?? 0)) ?>건</p>
+
+  <?php
+  $sizeStats = $sizeStats ?? [];
+  $catStats  = $catStats ?? [];
+  $sizeTotQty = array_sum(array_map(static fn ($r) => (int) $r['qty'], $sizeStats));
+  $sizeTotAmt = array_sum(array_map(static fn ($r) => (int) $r['amount'], $sizeStats));
+  $catTotQty  = array_sum(array_map(static fn ($r) => (int) $r['qty'], $catStats));
+  $catTotAmt  = array_sum(array_map(static fn ($r) => (int) $r['amount'], $catStats));
+  ?>
+  <div class="mt-4 grid grid-cols-1 lg:grid-cols-2 gap-4">
+    <!-- 용량별(리터별) 통계 -->
+    <div>
+      <div class="text-sm font-bold text-gray-700 mb-1">용량별(리터별) 통계</div>
+      <table class="w-full data-table text-sm">
+        <thead>
+          <tr class="bg-gray-50">
+            <th class="text-left px-2 py-1">용량</th>
+            <th class="text-right px-2 py-1">판매량(매)</th>
+            <th class="text-right px-2 py-1">판매금액(원)</th>
+          </tr>
+        </thead>
+        <tbody>
+          <?php if ($sizeStats === []): ?>
+          <tr><td colspan="3" class="text-center text-gray-400 py-4">데이터 없음</td></tr>
+          <?php else: ?>
+            <?php foreach ($sizeStats as $r): ?>
+            <tr>
+              <td class="text-left px-2 py-1"><?= esc($r['label']) ?></td>
+              <td class="text-right px-2 py-1"><?= number_format((int) $r['qty']) ?></td>
+              <td class="text-right px-2 py-1"><?= number_format((int) $r['amount']) ?></td>
+            </tr>
+            <?php endforeach; ?>
+            <tr class="bg-amber-50 font-bold">
+              <td class="text-left px-2 py-1">합계</td>
+              <td class="text-right px-2 py-1"><?= number_format((int) $sizeTotQty) ?></td>
+              <td class="text-right px-2 py-1"><?= number_format((int) $sizeTotAmt) ?></td>
+            </tr>
+          <?php endif; ?>
+        </tbody>
+      </table>
+    </div>
+
+    <!-- 품목별(봉투/음식물/폐기물) 통계 -->
+    <div>
+      <div class="text-sm font-bold text-gray-700 mb-1">품목별(봉투·음식물·폐기물) 통계</div>
+      <table class="w-full data-table text-sm">
+        <thead>
+          <tr class="bg-gray-50">
+            <th class="text-left px-2 py-1">품목</th>
+            <th class="text-right px-2 py-1">판매량(매)</th>
+            <th class="text-right px-2 py-1">판매금액(원)</th>
+          </tr>
+        </thead>
+        <tbody>
+          <?php if ($catStats === []): ?>
+          <tr><td colspan="3" class="text-center text-gray-400 py-4">데이터 없음</td></tr>
+          <?php else: ?>
+            <?php foreach ($catStats as $r): ?>
+            <tr>
+              <td class="text-left px-2 py-1"><?= esc($r['label']) ?></td>
+              <td class="text-right px-2 py-1"><?= number_format((int) $r['qty']) ?></td>
+              <td class="text-right px-2 py-1"><?= number_format((int) $r['amount']) ?></td>
+            </tr>
+            <?php endforeach; ?>
+            <tr class="bg-amber-50 font-bold">
+              <td class="text-left px-2 py-1">합계</td>
+              <td class="text-right px-2 py-1"><?= number_format((int) $catTotQty) ?></td>
+              <td class="text-right px-2 py-1"><?= number_format((int) $catTotAmt) ?></td>
+            </tr>
+          <?php endif; ?>
+        </tbody>
+      </table>
+    </div>
+  </div>
 </section>
 
 <script>