diff --git a/bricks/agent_input.js b/bricks/agent_input.js
index 8786a52..06f5831 100644
--- a/bricks/agent_input.js
+++ b/bricks/agent_input.js
@@ -6,6 +6,8 @@ bricks.AgentInput = class extends bricks.VBox {
     constructor(opts) {
         opts.height = 'auto';
         opts.width = '100%';
+        // 默认内边距，避免子控件（输入框/模型选择器/按钮）贴边；可用 opts.padding 覆盖
+        if (opts.padding === undefined) opts.padding = '8px 12px';
         super(opts);
 
         // file upload
diff --git a/bricks/tree.js b/bricks/tree.js
index fe69fa1..0bf1dbc 100644
--- a/bricks/tree.js
+++ b/bricks/tree.js
@@ -93,11 +93,11 @@ bricks.TreeNode = class extends bricks.VBox {
 			states:[
 				{
 					state: 'open',
-					url: bricks_resource('imgs/node-expand.svg')
+					url: '/bricks/imgs/node-expand.svg'
 				},
 				{
 					state: 'close',
-					url: bricks_resource('imgs/node-collapse.svg')
+					url: '/bricks/imgs/node-collapse.svg'
 				}
 			],
 			rate: 1,
@@ -172,9 +172,9 @@ bricks.TreeNode = class extends bricks.VBox {
 		}
 		if (! icons){
 			icons = {
-				open: bricks_resource('imgs/open-folder.svg'),
-				close: bricks_resource('imgs/close-folder.svg'),
-				leaf: bricks_resource('imgs/close-folder.svg')
+				open: '/bricks/imgs/open-folder.svg',
+				close: '/bricks/imgs/close-folder.svg',
+				leaf: '/bricks/imgs/close-folder.svg'
 			};
 		}
 		this.icons_urls = icons;