feat: restore legacy drag events and Tornado launch integration

src/MBN_STOCK_WEBVIEW.LegacyParityApp/Web/index.html

@@ -196,10 +196,12 @@
             <h3 id="operator-catalog-editor-title">추가·편집</h3>
             <span id="operator-catalog-code" class="operator-catalog-code"></span>
           </div>
-          <label class="operator-catalog-name-field">
-            <span id="operator-catalog-name-label">이름</span>
+          <div class="operator-catalog-name-field">
+            <label id="operator-catalog-name-label" for="operator-catalog-name">이름</label>
             <input id="operator-catalog-name" maxlength="128" autocomplete="off">
-          </label>
+            <button id="operator-catalog-name-check" type="button">중복확인</button>
+            <small id="operator-catalog-name-status" aria-live="polite"></small>
+          </div>
           <div class="operator-catalog-stock-search">
             <input id="operator-catalog-stock-query" type="search" maxlength="64"
               autocomplete="off" placeholder="종목명 검색">