diff --git a/public/css/style.css b/public/css/style.css
index eeb6bf2..3f5f1b9 100644
--- a/public/css/style.css
+++ b/public/css/style.css
@@ -18,24 +18,6 @@ body {
 }
 
 /* 顶部工具栏 */
-.toolbar {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  height: 44px;
-  padding: 0 12px;
-  background: linear-gradient(to bottom, #fdfdfd, #e8e8e8);
-  border-bottom: 1px solid #c0c0c0;
-  flex-shrink: 0;
-}
-
-.toolbar-left,
-.toolbar-center,
-.toolbar-right {
-  display: flex;
-  align-items: center;
-  gap: 8px;
-}
 
 .app-title {
   font-weight: 600;
@@ -141,6 +123,22 @@ body {
   color: #666;
 }
 
+.tree-header-actions {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+
+.tree-header-actions .icon-btn {
+  padding: 0 4px;
+  border-radius: 3px;
+}
+
+.tree-header-actions .icon-btn:hover {
+  background: #e5f1fb;
+  color: #0078d4;
+}
+
 .tree-content {
   flex: 1;
   overflow: auto;
@@ -554,10 +552,10 @@ body.mode-readonly .row-btn:not(.view) {
 /* ===== 工具栏（分组处理） ===== */
 .toolbar {
   display: flex;
-  align-items: stretch;
-  gap: 4px;
+  align-items: center;
+  gap: 6px 4px;
   min-height: 46px;
-  padding: 4px 8px;
+  padding: 5px 8px;
   background: linear-gradient(to bottom, #fdfdfd, #eaeaea);
   border-bottom: 1px solid #c0c0c0;
   flex-shrink: 0;
@@ -571,6 +569,11 @@ body.mode-readonly .row-btn:not(.view) {
   gap: 6px;
   padding: 2px 10px;
   border-right: 1px solid #d5d5d5;
+  white-space: nowrap;
+}
+
+.tool-group:last-child {
+  border-right: none;
 }
 
 .tool-group .group-label {
@@ -591,10 +594,6 @@ body.mode-readonly .row-btn:not(.view) {
   flex-wrap: wrap;
 }
 
-.dim-empty {
-  color: #8aa;
-  font-size: 12px;
-}
 
 .dim-item {
   display: flex;
diff --git a/public/index.html b/public/index.html
index a3d0e92..e0afb06 100644
--- a/public/index.html
+++ b/public/index.html
@@ -33,11 +33,6 @@
       </div>
     </div>
 
-    <div class="tool-group" title="配置操作">
-      <span class="group-label">配置</span>
-      <button id="btn-add-config" class="toolbar-btn" title="新增配置项">➕ 新增</button>
-      <button id="btn-collapse-all" class="toolbar-btn" title="全部折叠">⊟ 折叠</button>
-    </div>
 
     <div class="tool-group" title="数据操作">
       <span class="group-label">数据</span>
@@ -49,7 +44,7 @@
 
   <!-- 维度栏：展示已启用维度的筛选器与映射配置入口 -->
   <div class="dimension-bar" id="dimension-bar">
-    <span class="dim-empty" id="dim-empty">选择项目后展示维度筛选</span>
+
     <div class="dim-item" id="dim-idc" style="display:none">
       <span class="dim-name">机房</span>
       <select class="dim-select" id="dim-idc-select"></select>
@@ -74,6 +69,10 @@
     <aside class="tree-panel" id="tree-panel">
       <div class="tree-header">
         <span>配置树</span>
+        <div class="tree-header-actions">
+          <button id="btn-add-config" class="icon-btn" title="新增配置项">➕</button>
+          <button id="btn-collapse-all" class="icon-btn" title="全部折叠">⊟</button>
+        </div>
       </div>
       <div class="tree-content" id="tree-content">
         <div class="tree-empty">请先选择一个项目</div>
diff --git a/public/js/app.js b/public/js/app.js
index 60c8018..0c2fbca 100644
--- a/public/js/app.js
+++ b/public/js/app.js
@@ -174,7 +174,6 @@ function collectDimValues(field) {
  */
 function renderDimensionBar() {
   const p = state.currentProject;
-  const empty = document.getElementById("dim-empty");
   const mappingBtn = document.getElementById("btn-dim-mapping");
   const items = [
     { key: "idc", enable: "enableIdc", mapping: "idcMapping", field: "idc", box: "dim-idc", sel: "dim-idc-select", map: "dim-idc-mapping" },
@@ -183,14 +182,12 @@ function renderDimensionBar() {
   ];
 
   if (!p) {
-    empty.style.display = "";
     mappingBtn.style.display = "none";
     items.forEach((it) => (document.getElementById(it.box).style.display = "none"));
     return;
   }
 
   const anyEnabled = p.enableIdc || p.enableEnvironment || p.enableGroup;
-  empty.style.display = anyEnabled ? "none" : "";
   mappingBtn.style.display = anyEnabled ? "" : "none";
 
   items.forEach((it) => {
diff --git a/src/server.js b/src/server.js
index 370cc36..1afc16c 100644
--- a/src/server.js
+++ b/src/server.js
@@ -14,8 +14,8 @@ const PORT = process.env.PORT || 3000;
 // 解析 JSON 请求体
 app.use(express.json());
 
-// 静态资源服务
-app.use(express.static(path.join(__dirname, "..", "public")));
+// 静态资源服务（禁用缓存，避免浏览器加载到旧版本页面/脚本）
+app.use(express.static(path.join(__dirname, "..", "public"), { etag: false, lastModified: false, cacheControl: false, setHeaders: (res) => res.setHeader("Cache-Control", "no-store") }));
 
 // API 路由
 app.use("/api/projects", projectRoutes);