docs: 更新前端 AI 配置，支持多种技术栈

- admin-ui: Vue3 + Vite
- cashier-mobile: 技术栈待定（uni-app/React Native/Flutter）
- customer-mobile: 技术栈待定
- 添加各框架的 HTTP 调用示例

.idea/inspectionProfiles/Project_Default.xml

@@ -1,5 +1,6 @@
 <component name="InspectionProjectProfileManager">
   <profile version="1.0">
     <option name="myName" value="Project Default" />
+    <inspection_tool class="Eslint" enabled="true" level="WARNING" enabled_by_default="true" />
   </profile>
 </component>

.idea/misc.xml

@@ -1,5 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="ProjectRootManager" version="2" project-jdk-name="openjdk-26" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
   <component name="SshConsoleOptionsProvider">
     <option name="myEncoding" value="UTF-8" />
     <option name="myConnectionType" value="NONE" />

.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/rui-frontend.iml" filepath="$PROJECT_DIR$/.idea/rui-frontend.iml" />
+    </modules>
+  </component>
+</project>

.idea/rui-frontend.iml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>