feat: menu.ui + filler CSS + popup menu from top bar

wwwroot/index.ui

@@ -11,21 +11,23 @@
         {
             "widgettype": "urlwidget",
             "options": {
+                "cheight": 2.5,
                 "url": "{{entire_url('/top.ui')}}"
             }
         },
         {
             "widgettype": "HBox",
             "options": {
-                "css": "main-area",
+                "css": "filler",
-                "spacing": 0,
+                "width": "100%",
-                "width": "100%"
+                "spacing": 0
             },
             "subwidgets": [
                 {
                     "widgettype": "VBox",
                     "options": {
-                        "css": "rag-sidebar"
+                        "css": "rag-sidebar",
+                        "cwidth": 13
                     },
                     "subwidgets": [
                         {
@@ -117,15 +119,14 @@
                     "widgettype": "VBox",
                     "options": {
                         "id": "rag_main_content",
-                        "css": "rag-content",
+                        "css": "filler",
-                        "padding": "0"
+                        "padding": "8px"
                     },
                     "subwidgets": [
                         {
                             "widgettype": "Text",
                             "options": {
                                 "text": "欢迎使用 RAG Server — 多媒体知识库平台",
-                                "css": "",
                                 "i18n": false
                             }
                         }
@@ -136,7 +137,7 @@
         {
             "widgettype": "Text",
             "options": {
-                "text": "© 2026 RAG Server · 开元云科技",
+                "text": "© 2026 RAG Server",
                 "css": "rag-bottom"
             }
         }

wwwroot/menu.ui

@@ -0,0 +1,40 @@
+{% set roles = get_user_roles(get_user()) %}
+{% set role_str = roles|join(',') %}
+{
+    "widgettype": "Menu",
+    "id": "rag_menu",
+    "options": {
+        "width": "100%",
+        "height": "100%",
+        "items": [
+            {
+                "name": "knowledge_bases",
+                "label": "知识库",
+                "icon": "{{entire_url('/bricks/imgs/app.svg')}}",
+                "url": "{{entire_url('/knowledge_bases_list/index.ui')}}",
+                "target": "app.rag_main_content"
+            },
+            {
+                "name": "documents",
+                "label": "文档管理",
+                "icon": "{{entire_url('/bricks/imgs/app_add.svg')}}",
+                "url": "{{entire_url('/documents_list/index.ui')}}",
+                "target": "app.rag_main_content"
+            },
+            {
+                "name": "engines",
+                "label": "引擎配置",
+                "icon": "{{entire_url('/bricks/imgs/rocket.svg')}}",
+                "url": "{{entire_url('/engine_configs_list/index.ui')}}",
+                "target": "app.rag_main_content"
+            },
+            {
+                "name": "subscriptions",
+                "label": "订阅管理",
+                "icon": "{{entire_url('/bricks/imgs/coins.svg')}}",
+                "url": "{{entire_url('/subscriptions_list/index.ui')}}",
+                "target": "app.rag_main_content"
+            }
+        ]
+    }
+}

wwwroot/top.ui

@@ -11,30 +11,44 @@
     },
     "subwidgets": [
         {
-            "widgettype": "Svg",
+            "widgettype": "HBox",
             "options": {
-                "rate": 2,
-                "url": "{{entire_url('/bricks/imgs/app.svg')}}",
                 "css": "clickable",
-                "tip": "RAG Server"
+                "tip": "主菜单"
             },
+            "subwidgets": [
+                {
+                    "widgettype": "Svg",
+                    "options": {
+                        "rate": 2,
+                        "url": "{{entire_url('/bricks/imgs/app.svg')}}"
+                    }
+                },
+                {
+                    "widgettype": "Text",
+                    "options": {
+                        "text": "RAG Server",
+                        "i18n": false
+                    }
+                }
+            ],
             "binds": [
                 {
                     "wid": "self",
                     "event": "click",
-                    "actiontype": "script",
+                    "actiontype": "urlwidget",
-                    "script": "bricks.app.show_windows_panel(event)"
+                    "target": "Popup",
+                    "popup_options": {
+                        "cwidth": 12,
+                        "eventpos": true,
+                        "dismiss_events": ["command"]
+                    },
+                    "options": {
+                        "url": "{{entire_url('/menu.ui')}}"
+                    }
                 }
             ]
         },
-        {
-            "widgettype": "Text",
-            "options": {
-                "text": "RAG Server",
-                "i18n": false,
-                "css": ""
-            }
-        },
         {
             "widgettype": "Text",
             "options": {