feat: 도매상 잔고 모달에 월간 매출 추가

- 백제/지오영/수인 월간매출 API 라우트 추가
- 모달 UI: 잔고 + 월간 매출 동시 표시
- 총 주문액 / 총 미수금 요약 표시

backend/templates/admin_rx_usage.html

@@ -2256,26 +2256,43 @@
         text-transform: uppercase;
         letter-spacing: 0.5px;
     }
-    .balance-total {
+    .balance-summary {
         background: linear-gradient(135deg, rgba(168, 85, 247, 0.1), rgba(6, 182, 212, 0.1));
         border-radius: 12px;
         padding: 20px;
-        text-align: center;
-        margin-top: 8px;
+        display: flex;
+        justify-content: space-around;
+        align-items: center;
+        margin-top: 12px;
+        gap: 16px;
     }
-    .balance-total-label {
+    .summary-item {
+        text-align: center;
+        flex: 1;
+    }
+    .summary-label {
         font-size: 12px;
         color: var(--text-muted);
         margin-bottom: 8px;
     }
-    .balance-total-value {
-        font-size: 28px;
+    .summary-value {
+        font-size: 24px;
         font-weight: 700;
         font-family: 'JetBrains Mono', monospace;
+    }
+    .summary-value.sales {
+        color: #10b981;
+    }
+    .summary-value.balance {
         background: linear-gradient(135deg, #a855f7, #06b6d4);
         -webkit-background-clip: text;
         -webkit-text-fill-color: transparent;
     }
+    .summary-divider {
+        width: 1px;
+        height: 50px;
+        background: var(--border);
+    }
     .balance-updated {
         text-align: center;
         font-size: 11px;
@@ -2300,17 +2317,23 @@
         baekje: { 
             id: 'baekje', name: '백제약품', icon: '💉', 
             logo: '/static/img/logo_baekje.svg',
-            color: '#f59e0b', api: '/api/baekje/balance' 
+            color: '#f59e0b', 
+            balanceApi: '/api/baekje/balance',
+            salesApi: '/api/baekje/monthly-sales'
         },
         geoyoung: { 
             id: 'geoyoung', name: '지오영', icon: '🏭', 
             logo: '/static/img/logo_geoyoung.ico',
-            color: '#06b6d4', api: '/api/geoyoung/balance' 
+            color: '#06b6d4', 
+            balanceApi: '/api/geoyoung/balance',
+            salesApi: '/api/geoyoung/monthly-sales'
         },
         sooin: { 
             id: 'sooin', name: '수인약품', icon: '💊', 
             logo: '/static/img/logo_sooin.svg',
-            color: '#a855f7', api: '/api/sooin/balance' 
+            color: '#a855f7', 
+            balanceApi: '/api/sooin/balance',
+            salesApi: '/api/sooin/monthly-sales'
         }
     };
     const WHOLESALER_ORDER = ['baekje', 'geoyoung', 'sooin'];
@@ -2320,36 +2343,47 @@
         content.innerHTML = `
             <div class="loading-state">
                 <div class="loading-spinner"></div>
-                <div>잔고 조회 중...</div>
+                <div>잔고 및 매출 조회 중...</div>
             </div>`;
         
         const wholesalers = WHOLESALER_ORDER.map(id => WHOLESALER_CONFIG[id]);
+        const now = new Date();
+        const year = now.getFullYear();
+        const month = now.getMonth() + 1;
         
-        const results = {};
+        const balanceResults = {};
+        const salesResults = {};
         let totalBalance = 0;
+        let totalSales = 0;
         
-        // 병렬로 조회
-        await Promise.all(wholesalers.map(async (ws) => {
-            try {
-                const resp = await fetch(ws.api, { timeout: 30000 });
-                const data = await resp.json();
-                results[ws.id] = data;
-                if (data.success && data.balance) {
-                    totalBalance += data.balance;
-                }
-            } catch (err) {
-                results[ws.id] = { success: false, error: err.message };
-            }
-        }));
+        // 병렬로 잔고 + 월간매출 조회
+        await Promise.all(wholesalers.flatMap(ws => [
+            // 잔고 조회
+            fetch(ws.balanceApi).then(r => r.json()).then(data => {
+                balanceResults[ws.id] = data;
+                if (data.success && data.balance) totalBalance += data.balance;
+            }).catch(err => {
+                balanceResults[ws.id] = { success: false, error: err.message };
+            }),
+            // 월간 매출 조회
+            fetch(`${ws.salesApi}?year=${year}&month=${month}`).then(r => r.json()).then(data => {
+                salesResults[ws.id] = data;
+                if (data.success && data.total_amount) totalSales += data.total_amount;
+            }).catch(err => {
+                salesResults[ws.id] = { success: false, error: err.message };
+            })
+        ]));
         
         // 결과 렌더링
         let html = '<div class="balance-grid">';
         
         wholesalers.forEach(ws => {
-            const data = results[ws.id];
-            const isError = !data.success;
-            const balance = data.balance || 0;
-            const prevBalance = data.prev_balance || data.prev_month_balance || 0;
+            const balData = balanceResults[ws.id] || {};
+            const salesData = salesResults[ws.id] || {};
+            const isError = !balData.success;
+            const balance = balData.balance || 0;
+            const monthlySales = salesData.total_amount || 0;
+            const monthlyPaid = salesData.total_paid || 0;
             
             html += `
                 <div class="balance-card ${isError ? 'error' : ''}">
@@ -2362,8 +2396,9 @@
                         <div class="balance-name">${ws.name}</div>
                         <div class="balance-detail">
                             ${isError 
-                                ? `❌ ${data.error || '조회 실패'}` 
-                                : `전월/전일: ${prevBalance.toLocaleString()}원`}
+                                ? `❌ ${balData.error || '조회 실패'}` 
+                                : `${month}월 매출: <span style="color:${ws.color};font-weight:600;">${monthlySales.toLocaleString()}원</span>
+                                   ${monthlyPaid > 0 ? ` · 입금: ${monthlyPaid.toLocaleString()}원` : ''}`}
                         </div>
                     </div>
                     <div class="balance-amount">
@@ -2376,9 +2411,16 @@
         });
         
         html += `
-            <div class="balance-total">
-                <div class="balance-total-label">총 미수금</div>
-                <div class="balance-total-value">${totalBalance.toLocaleString()}원</div>
+            <div class="balance-summary">
+                <div class="summary-item">
+                    <div class="summary-label">📊 ${month}월 총 주문</div>
+                    <div class="summary-value sales">${totalSales.toLocaleString()}원</div>
+                </div>
+                <div class="summary-divider"></div>
+                <div class="summary-item">
+                    <div class="summary-label">💰 총 미수금</div>
+                    <div class="summary-value balance">${totalBalance.toLocaleString()}원</div>
+                </div>
             </div>
             <div class="balance-updated">🕐 ${new Date().toLocaleString('ko-KR')}</div>
         </div>`;