feat(tools): STMATE 원본 DBF/SMT/STC/JB_R 직접 읽기·쓰기 브리지 서버 및 UI 연동 추가 (tools/stmate-test)

tools/stmate-test/index.html

@@ -7,6 +7,7 @@
     <link rel="stylesheet" href="style.css" />
     <script defer src="calc.js"></script>
     <script defer src="app_views_cost.js"></script>
+    <script defer src="db_bridge.js"></script>
     <script defer src="app.js"></script>
   </head>
   <body>
@@ -47,6 +48,7 @@
       <section class="kpi-grid" id="kpiSummary" aria-label="핵심 계산 요약"></section>
 
       <nav class="tab-nav" id="mainTabs" aria-label="STMATE 기능 단계">
+        <button type="button" data-tab="db">00 원본 DBF · STC 연동</button>
         <button type="button" data-tab="resources" class="active">01 기초자원 · 노임환산</button>
         <button type="button" data-tab="machines">02 중기 · 단가산출(Q식)</button>
         <button type="button" data-tab="ilwi">03 일위대가 조립</button>