feat: 불량 수량 입력에 숫자 키패드 모달 추가

frontend/components/pop/hardcoded/production/DefectTypeModal.tsx

@@ -45,27 +45,89 @@ function QtyInput({
   onChange: (v: number) => void;
   max: number;
 }) {
+  const [padOpen, setPadOpen] = useState(false);
+  const [padValue, setPadValue] = useState(String(value));
+
+  const handlePadOpen = () => {
+    setPadValue(String(value));
+    setPadOpen(true);
+  };
+
+  const handlePadKey = (key: string) => {
+    if (key === "backspace") {
+      setPadValue((prev) => prev.length > 1 ? prev.slice(0, -1) : "0");
+    } else if (key === "clear") {
+      setPadValue("0");
+    } else if (key === "max") {
+      setPadValue(String(max));
+    } else {
+      setPadValue((prev) => prev === "0" ? key : prev + key);
+    }
+  };
+
+  const handlePadConfirm = () => {
+    const num = Math.min(Math.max(0, parseInt(padValue, 10) || 0), max);
+    onChange(num);
+    setPadOpen(false);
+  };
+
   return (
-    <div className="flex items-center gap-2">
-      <button
-        onClick={() => onChange(Math.max(0, value - 1))}
-        className="w-10 h-10 rounded-lg bg-gray-100 text-gray-600 text-lg font-bold flex items-center justify-center active:scale-95 transition-all hover:bg-gray-200"
-      >
-        -
-      </button>
-      <span
-        className="w-12 text-center text-lg font-bold text-gray-900"
-        style={{ fontVariantNumeric: "tabular-nums" }}
-      >
-        {value}
-      </span>
-      <button
-        onClick={() => onChange(Math.min(max, value + 1))}
-        className="w-10 h-10 rounded-lg bg-gray-100 text-gray-600 text-lg font-bold flex items-center justify-center active:scale-95 transition-all hover:bg-gray-200"
-      >
-        +
-      </button>
-    </div>
+    <>
+      <div className="flex items-center gap-2">
+        <button
+          onClick={() => onChange(Math.max(0, value - 1))}
+          className="w-10 h-10 rounded-lg bg-gray-100 text-gray-600 text-lg font-bold flex items-center justify-center active:scale-95 transition-all hover:bg-gray-200"
+        >
+          -
+        </button>
+        <button
+          onClick={handlePadOpen}
+          className="w-16 h-10 text-center text-lg font-bold text-gray-900 bg-gray-50 rounded-lg border-2 border-gray-200 hover:border-red-300 active:scale-95 transition-all"
+          style={{ fontVariantNumeric: "tabular-nums" }}
+        >
+          {value}
+        </button>
+        <button
+          onClick={() => onChange(Math.min(max, value + 1))}
+          className="w-10 h-10 rounded-lg bg-gray-100 text-gray-600 text-lg font-bold flex items-center justify-center active:scale-95 transition-all hover:bg-gray-200"
+        >
+          +
+        </button>
+      </div>
+
+      {/* 숫자 키패드 모달 */}
+      {padOpen && (
+        <div className="fixed inset-0 z-[60] flex items-center justify-center">
+          <div className="absolute inset-0 bg-black/40" onClick={() => setPadOpen(false)} />
+          <div className="relative bg-white rounded-2xl shadow-2xl p-4 w-[280px] z-10">
+            <div className="text-center mb-3">
+              <p className="text-sm text-gray-500">불량 수량 (최대 {max})</p>
+              <p className="text-3xl font-bold text-gray-900 mt-1" style={{ fontVariantNumeric: "tabular-nums" }}>{padValue}</p>
+            </div>
+            <div className="grid grid-cols-3 gap-2 mb-3">
+              {["1","2","3","4","5","6","7","8","9"].map((k) => (
+                <button key={k} onClick={() => handlePadKey(k)}
+                  className="h-12 rounded-xl bg-gray-100 text-lg font-bold text-gray-800 active:scale-95 active:bg-gray-200 transition-all">{k}</button>
+              ))}
+              <button onClick={() => handlePadKey("clear")}
+                className="h-12 rounded-xl bg-gray-200 text-sm font-bold text-gray-600 active:scale-95 transition-all">C</button>
+              <button onClick={() => handlePadKey("0")}
+                className="h-12 rounded-xl bg-gray-100 text-lg font-bold text-gray-800 active:scale-95 transition-all">0</button>
+              <button onClick={() => handlePadKey("backspace")}
+                className="h-12 rounded-xl bg-gray-200 text-sm font-bold text-gray-600 active:scale-95 transition-all">←</button>
+            </div>
+            <button onClick={() => handlePadKey("max")}
+              className="w-full h-10 rounded-xl bg-red-50 text-red-600 text-sm font-bold mb-2 active:scale-95 transition-all">MAX ({max})</button>
+            <div className="flex gap-2">
+              <button onClick={() => setPadOpen(false)}
+                className="flex-1 h-11 rounded-xl bg-gray-100 text-gray-700 font-semibold active:scale-95 transition-all">취소</button>
+              <button onClick={handlePadConfirm}
+                className="flex-1 h-11 rounded-xl bg-red-500 text-white font-bold active:scale-95 transition-all">확인</button>
+            </div>
+          </div>
+        </div>
+      )}
+    </>
   );
 }