Phase 3 발주/입고/재고 관리 구현

- DB: bag_order, bag_order_item, bag_receiving, bag_inventory 테이블
- 발주: UUID v4, SHA-256 해시, LOT번호 자동생성, 봉투별 품목 관리
  - 포장단위 연동 (박스→낱장 자동 환산), 단가 연동 (금액 자동 계산)
  - 발주 현황 (기간/상태 필터), 상세 조회, 취소/삭제 (상태 변경)
- 입고: 발주건 기반 입고 처리, 박스→낱장 환산, 재고 자동 가산
- 재고: 지자체별 봉투 종류별 현재 재고 조회
- E2E 테스트 7개 전체 통과

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/Views/admin/bag_receiving/create.php

@@ -0,0 +1,53 @@
+<section class="border-b border-gray-300 p-2 shrink-0 bg-control-panel">
+  <span class="text-sm font-bold text-gray-700">입고 처리</span>
+</section>
+<div class="border border-gray-300 p-4 mt-2 bg-white max-w-3xl">
+  <form action="<?= base_url('admin/bag-receivings/store') ?>" method="POST" class="space-y-4">
+    <?= csrf_field() ?>
+
+    <div class="flex flex-wrap items-center gap-2">
+      <label class="block text-sm font-bold text-gray-700 w-28">발주건</label>
+      <select class="border border-gray-300 rounded px-3 py-1.5 text-sm w-72" name="br_bo_idx">
+        <option value="">선택</option>
+        <?php foreach ($orders as $od): ?>
+        <option value="<?= esc($od->bo_idx) ?>" <?= (int) old('br_bo_idx') === (int) $od->bo_idx ? 'selected' : '' ?>>
+          <?= esc($od->bo_lot_no) ?> (<?= esc($od->bo_order_date) ?>)
+        </option>
+        <?php endforeach; ?>
+      </select>
+    </div>
+
+    <div class="flex flex-wrap items-center gap-2">
+      <label class="block text-sm font-bold text-gray-700 w-28">봉투코드</label>
+      <input class="border border-gray-300 rounded px-3 py-1.5 text-sm w-44" name="br_bag_code" type="text" value="<?= esc(old('br_bag_code')) ?>"/>
+    </div>
+
+    <div class="flex flex-wrap items-center gap-2">
+      <label class="block text-sm font-bold text-gray-700 w-28">박스수 <span class="text-red-500">*</span></label>
+      <input class="border border-gray-300 rounded px-3 py-1.5 text-sm w-32 text-right" name="br_qty_box" type="number" min="0" value="<?= esc(old('br_qty_box', '0')) ?>" required/>
+    </div>
+
+    <div class="flex flex-wrap items-center gap-2">
+      <label class="block text-sm font-bold text-gray-700 w-28">입고일 <span class="text-red-500">*</span></label>
+      <input class="border border-gray-300 rounded px-3 py-1.5 text-sm w-44" name="br_receive_date" type="date" value="<?= esc(old('br_receive_date', date('Y-m-d'))) ?>" required/>
+    </div>
+
+    <div class="flex flex-wrap items-center gap-2">
+      <label class="block text-sm font-bold text-gray-700 w-28">보내는분</label>
+      <input class="border border-gray-300 rounded px-3 py-1.5 text-sm w-44" name="br_sender_name" type="text" value="<?= esc(old('br_sender_name')) ?>"/>
+    </div>
+
+    <div class="flex flex-wrap items-center gap-2">
+      <label class="block text-sm font-bold text-gray-700 w-28">구분</label>
+      <select class="border border-gray-300 rounded px-3 py-1.5 text-sm w-44" name="br_type">
+        <option value="batch" <?= old('br_type') === 'batch' ? 'selected' : '' ?>>batch</option>
+        <option value="scanner" <?= old('br_type') === 'scanner' ? 'selected' : '' ?>>scanner</option>
+      </select>
+    </div>
+
+    <div class="flex gap-2 pt-2">
+      <button type="submit" class="bg-btn-search text-white px-6 py-1.5 rounded-sm text-sm shadow hover:opacity-90 transition">등록</button>
+      <a href="<?= base_url('admin/bag-receivings') ?>" class="bg-gray-200 text-gray-700 px-6 py-1.5 rounded-sm text-sm hover:bg-gray-300 transition">취소</a>
+    </div>
+  </form>
+</div>