feat(cupang): 달력을 2개월(현재+다음 달) 뷰로 개편

- index 라우터가 두 달치 출고를 합쳐(중복 id 제거) 달 별 격자 2개를 생성
- 상단 바: ‹ › 이동 + 기간 제목 + [오늘], 달마다 머리글/월 출고 합계 배지
- 셀 UI 정리: 오늘=검은 원, 선택=링, 출고일=건수/센터수 태그, 타월은 흐리게
- 범례 추가, 1200px 이하에서는 두 달을 세로로 배치

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

app/modules/cupang/router.py

@@ -129,11 +129,18 @@ async def index(request: Request) -> HTMLResponse:
     store, user = guard
 
     year, month = _ym(request)
+    next_y, next_m = (year + 1, 1) if month == 12 else (year, month + 1)
+    prev_y, prev_m = (year - 1, 12) if month == 1 else (year, month - 1)
+
+    # 달력은 현재 달 + 다음 달 2개월을 함께 보여준다.
     # 취소된 묶음은 달력·목록 어디에도 보이지 않는다(soft delete = 삭제로 취급).
-    shipments = [
-        s for s in store.list_shipments(year=year, month=month)
-        if s.get("status") != "취소"
-    ]
+    merged: dict[Any, dict[str, Any]] = {}
+    for y, m in ((year, month), (next_y, next_m)):
+        for s in store.list_shipments(year=y, month=m):
+            if s.get("status") == "취소":
+                continue
+            merged[s["id"]] = s
+    shipments = list(merged.values())
 
     # 달력 칸에는 출고 건수와 센터 수만 보여준다.
     counts: dict[str, dict[str, Any]] = {}
@@ -147,11 +154,12 @@ async def index(request: Request) -> HTMLResponse:
     for cell in counts.values():
         cell["centers"] = len(cell["centers"])
 
-    # 선택 날짜 (기본: 오늘이 이번 달이면 오늘, 아니면 1일)
+    # 선택 날짜 (기본: 오늘이 보이는 두 달 안이면 오늘, 아니면 첫 달 1일)
     sel = request.query_params.get("date") or ""
     today = today_kst()
     if not sel:
-        sel = today.isoformat() if (today.year == year and today.month == month) else f"{year:04d}-{month:02d}-01"
+        in_view = (today.year, today.month) in ((year, month), (next_y, next_m))
+        sel = today.isoformat() if in_view else f"{year:04d}-{month:02d}-01"
 
     # 선택일의 묶음 — 달력과 같은 기준(출고일)
     sel_shipments = [s for s in shipments if s.get("ship_date") == sel]
@@ -172,27 +180,39 @@ async def index(request: Request) -> HTMLResponse:
         s["total_boxes"] = sum(it["boxes"] for it in s["items"])
 
     cal = _calendar.Calendar(firstweekday=6)  # 일요일 시작
-    weeks = cal.monthdatescalendar(year, month)
-    cal_weeks = [
-        [
-            {
-                "date": d.isoformat(),
-                "day": d.day,
-                "in_month": d.month == month,
-                "is_today": d == today,
-                "is_selected": d.isoformat() == sel,
-                "is_sunday": d.weekday() == 6,
-                "is_saturday": d.weekday() == 5,
-                "is_holiday": is_holiday(d),
-                "counts": counts.get(d.isoformat(), {}),
-            }
-            for d in week
-        ]
-        for week in weeks
-    ]
 
-    prev_y, prev_m = (year - 1, 12) if month == 1 else (year, month - 1)
-    next_y, next_m = (year + 1, 1) if month == 12 else (year, month + 1)
+    def _build_month(y: int, m: int) -> dict[str, Any]:
+        weeks = [
+            [
+                {
+                    "date": d.isoformat(),
+                    "day": d.day,
+                    "in_month": d.month == m,
+                    "is_today": d == today,
+                    "is_selected": d.isoformat() == sel,
+                    "is_sunday": d.weekday() == 6,
+                    "is_saturday": d.weekday() == 5,
+                    "is_holiday": is_holiday(d),
+                    "counts": counts.get(d.isoformat(), {}),
+                }
+                for d in week
+            ]
+            for week in cal.monthdatescalendar(y, m)
+        ]
+        ship_total = sum(
+            int(c.get("ship") or 0)
+            for day, c in counts.items()
+            if day[:7] == f"{y:04d}-{m:02d}"
+        )
+        return {
+            "year": y,
+            "month": m,
+            "label": f"{y}년 {m}월",
+            "weeks": weeks,
+            "ship_total": ship_total,
+        }
+
+    months = [_build_month(year, month), _build_month(next_y, next_m)]
 
     return render_template(
         request,
@@ -202,13 +222,14 @@ async def index(request: Request) -> HTMLResponse:
             "is_admin": is_admin(user),
             "nav_items": build_erp_nav(user, active="cupang"),
             "page_title": "쿠팡 밀크런",
-            "page_subtitle": f"{year}년 {month}월 출고 일정",
+            "page_subtitle": f"{year}년 {month}월 · {next_y}년 {next_m}월 출고 일정",
             "year": year,
             "month": month,
             "prev_y": prev_y, "prev_m": prev_m,
             "next_y": next_y, "next_m": next_m,
+            "today_iso": today.isoformat(),
             "weekdays": ["일", "월", "화", "수", "목", "금", "토"],
-            "cal_weeks": cal_weeks,
+            "months": months,
             "selected_date": sel,
             "sel_shipments": sel_shipments,
         },

app/modules/cupang/templates/cupang/box_calc.html

@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901f" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901g" />{% endblock %}
 
 {% block content %}
 <section class="cpg">

app/modules/cupang/templates/cupang/box_rules.html

@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901f" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901g" />{% endblock %}
 
 {% block content %}
 <section class="cpg">

app/modules/cupang/templates/cupang/centers.html

@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901f" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901g" />{% endblock %}
 
 {% block content %}
 <section class="cpg">

app/modules/cupang/templates/cupang/detail.html

@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901f" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901g" />{% endblock %}
 
 {% block content %}
 <section class="cpg">

app/modules/cupang/templates/cupang/form.html

@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901f" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901g" />{% endblock %}
 
 {% block content %}
 <section class="cpg">

app/modules/cupang/templates/cupang/index.html

@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901f" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901g" />{% endblock %}
 
 {% block content %}
 <section class="cpg">
@@ -19,40 +19,62 @@
   </div>
 
   <div class="cpg-layout">
-    <!-- ── 왼쪽: 큰 월간 달력 ── -->
+    <!-- ── 왼쪽: 2개월 월간 달력 ── -->
     <div class="erp-card cpg-cal-card">
-      <div class="cpg-cal-head">
-        <a class="erp-btn erp-btn-outline cpg-nav-btn"
-           href="/cupang/?year={{ prev_y }}&month={{ prev_m }}">‹</a>
-        <h2 class="cpg-cal-title">{{ year }}년 {{ month }}월</h2>
-        <a class="erp-btn erp-btn-outline cpg-nav-btn"
-           href="/cupang/?year={{ next_y }}&month={{ next_m }}">›</a>
+      <div class="cpg-mcal-bar">
+        <div class="cpg-mcal-nav">
+          <a class="cpg-mcal-navbtn" title="이전 달"
+             href="/cupang/?year={{ prev_y }}&month={{ prev_m }}">‹</a>
+          <a class="cpg-mcal-navbtn" title="다음 달"
+             href="/cupang/?year={{ next_y }}&month={{ next_m }}">›</a>
+        </div>
+        <h2 class="cpg-mcal-range">{{ months[0].label }} – {{ months[1].label }}</h2>
+        <a class="cpg-mcal-todaybtn" href="/cupang/">오늘</a>
       </div>
 
-      <div class="cpg-cal-grid">
-        {% for wd in weekdays %}
-        <div class="cpg-cal-wd {% if loop.index0 == 0 %}cpg-sun{% elif loop.index0 == 6 %}cpg-sat{% endif %}">{{ wd }}</div>
-        {% endfor %}
+      <div class="cpg-mcal-months">
+        {% for m in months %}
+        <section class="cpg-mcal{% if loop.first %} is-current{% endif %}">
+          <header class="cpg-mcal-h">
+            <span class="cpg-mcal-mname">{{ m.month }}월</span>
+            <span class="cpg-mcal-myear">{{ m.year }}</span>
+            {% if m.ship_total %}
+            <span class="cpg-mcal-total">출고 {{ m.ship_total }}건</span>
+            {% endif %}
+          </header>
 
-        {% for week in cal_weeks %}
-          {% for cell in week %}
-          <a class="cpg-cal-cell
-                    {% if not cell.in_month %}cpg-out{% endif %}
-                    {% if cell.is_today %}cpg-today{% endif %}
-                    {% if cell.is_selected %}cpg-selected{% endif %}
-                    {% if cell.is_sunday or cell.is_holiday %}cpg-red{% elif cell.is_saturday %}cpg-blue{% endif %}"
-             href="/cupang/?year={{ year }}&month={{ month }}&date={{ cell.date }}">
-            <span class="cpg-cal-day">{{ cell.day }}</span>
-            <span class="cpg-cal-badges">
-              {% if cell.counts.ship %}
-              <span class="erp-badge erp-badge-inverse cpg-mini">출고 {{ cell.counts.ship }}건</span>
-              <span class="erp-badge erp-badge-neutral cpg-mini">센터 {{ cell.counts.centers }}곳</span>
-              {% endif %}
-            </span>
-          </a>
-          {% endfor %}
+          <div class="cpg-mcal-grid">
+            {% for wd in weekdays %}
+            <div class="cpg-mcal-wd {% if loop.index0 == 0 %}is-sun{% elif loop.index0 == 6 %}is-sat{% endif %}">{{ wd }}</div>
+            {% endfor %}
+
+            {% for week in m.weeks %}
+              {% for cell in week %}
+              <a class="cpg-mcal-cell
+                        {% if not cell.in_month %}is-out{% endif %}
+                        {% if cell.is_today %}is-today{% endif %}
+                        {% if cell.is_selected %}is-selected{% endif %}
+                        {% if cell.counts.ship %}has-ship{% endif %}
+                        {% if cell.is_sunday or cell.is_holiday %}is-red{% elif cell.is_saturday %}is-blue{% endif %}"
+                 href="/cupang/?year={{ year }}&month={{ month }}&date={{ cell.date }}"
+                 title="{{ cell.date }}{% if cell.counts.ship %} — 출고 {{ cell.counts.ship }}건 / 센터 {{ cell.counts.centers }}곳{% endif %}">
+                <span class="cpg-mcal-day">{{ cell.day }}</span>
+                {% if cell.counts.ship %}
+                <span class="cpg-mcal-tag">{{ cell.counts.ship }}건<em>{{ cell.counts.centers }}곳</em></span>
+                {% endif %}
+              </a>
+              {% endfor %}
+            {% endfor %}
+          </div>
+        </section>
         {% endfor %}
       </div>
+
+      <div class="cpg-mcal-legend">
+        <span><i class="cpg-lg-dot"></i>출고 있는 날</span>
+        <span><i class="cpg-lg-today"></i>오늘</span>
+        <span><i class="cpg-lg-sel"></i>선택한 날</span>
+      </div>
     </div>
 
     <!-- ── 오른쪽: 선택일 출고 묶음 리스트 ── -->

app/modules/cupang/templates/cupang/products.html

@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901f" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901g" />{% endblock %}
 
 {% block content %}
 <section class="cpg">