feat: 发布3.0版本，新增文档处理能力和演示模式

- 升级langchain4j版本至1.13.0
- 新增docx/pdf/xlsx文档处理技能模块
- 添加演示模式配置和切面拦截
- 优化聊天服务和可观测性监听器

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ruoyi-common/ruoyi-common-web/src/main/java/org/ruoyi/common/web/aspectj/DemoAspect.java

@@ -0,0 +1,86 @@
+package org.ruoyi.common.web.aspectj;
+
+import jakarta.servlet.http.HttpServletRequest;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.aspectj.lang.ProceedingJoinPoint;
+import org.aspectj.lang.annotation.Around;
+import org.aspectj.lang.annotation.Aspect;
+import org.ruoyi.common.core.exception.ServiceException;
+import org.ruoyi.common.core.utils.ServletUtils;
+import org.ruoyi.common.web.config.properties.DemoProperties;
+
+import java.util.Set;
+
+/**
+ * 演示模式切面 - 拦截写操作
+ *
+ * @author ruoyi
+ */
+@Slf4j
+@Aspect
+@RequiredArgsConstructor
+public class DemoAspect {
+
+    private final DemoProperties demoProperties;
+
+    /**
+     * 需要拦截的 HTTP 方法
+     */
+    private static final Set<String> WRITE_METHODS = Set.of(
+        "POST", "PUT", "DELETE", "PATCH"
+    );
+
+    /**
+     * 拦截所有 Controller 的写操作
+     */
+    @Around("execution(* org.ruoyi..controller..*.*(..))")
+    public Object around(ProceedingJoinPoint point) throws Throwable {
+        // 未开启演示模式，直接放行
+        if (!Boolean.TRUE.equals(demoProperties.getEnabled())) {
+            return point.proceed();
+        }
+
+        HttpServletRequest request = ServletUtils.getRequest();
+        if (request == null) {
+            return point.proceed();
+        }
+
+        String method = request.getMethod();
+        String requestUri = request.getRequestURI();
+
+        // 非写操作，放行
+        if (!WRITE_METHODS.contains(method.toUpperCase())) {
+            return point.proceed();
+        }
+
+        // 检查排除路径
+        for (String exclude : demoProperties.getExcludes()) {
+            if (match(exclude, requestUri)) {
+                return point.proceed();
+            }
+        }
+
+        log.info("演示模式拦截写操作: {} {}", method, requestUri);
+        throw new ServiceException(demoProperties.getMessage());
+    }
+
+    /**
+     * 路径匹配（支持通配符 * 和 **）
+     */
+    private boolean match(String pattern, String path) {
+        if (pattern.endsWith("/**")) {
+            String prefix = pattern.substring(0, pattern.length() - 3);
+            return path.startsWith(prefix);
+        }
+        if (pattern.endsWith("/*")) {
+            String prefix = pattern.substring(0, pattern.length() - 2);
+            if (!path.startsWith(prefix)) {
+                return false;
+            }
+            String suffix = path.substring(prefix.length());
+            return suffix.indexOf('/') == -1;
+        }
+        return path.equals(pattern);
+    }
+}

ruoyi-common/ruoyi-common-web/src/main/java/org/ruoyi/common/web/config/DemoAutoConfiguration.java

@@ -0,0 +1,25 @@
+package org.ruoyi.common.web.config;
+
+import org.ruoyi.common.web.aspectj.DemoAspect;
+import org.ruoyi.common.web.config.properties.DemoProperties;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * 演示模式自动配置
+ *
+ * @author ruoyi
+ */
+@Configuration
+@EnableConfigurationProperties(DemoProperties.class)
+public class DemoAutoConfiguration {
+
+    /**
+     * 注册演示模式切面
+     */
+    @Bean
+    public DemoAspect demoAspect(DemoProperties demoProperties) {
+        return new DemoAspect(demoProperties);
+    }
+}

ruoyi-common/ruoyi-common-web/src/main/java/org/ruoyi/common/web/config/properties/DemoProperties.java

@@ -0,0 +1,32 @@
+package org.ruoyi.common.web.config.properties;
+
+import lombok.Data;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * 演示模式 配置属性
+ *
+ * @author ruoyi
+ */
+@Data
+@ConfigurationProperties(prefix = "demo")
+public class DemoProperties {
+
+    /**
+     * 是否开启演示模式
+     */
+    private Boolean enabled = false;
+
+    /**
+     * 提示消息
+     */
+    private String message = "演示模式，不允许进行写操作";
+
+    /**
+     * 排除的路径（这些路径不受演示模式限制）
+     */
+    private List<String> excludes = new ArrayList<>();
+}

ruoyi-common/ruoyi-common-web/src/main/resources/META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports

@@ -1,4 +1,5 @@
 org.ruoyi.common.web.config.CaptchaConfig
+org.ruoyi.common.web.config.DemoAutoConfiguration
 org.ruoyi.common.web.config.FilterConfig
 org.ruoyi.common.web.config.I18nConfig
 org.ruoyi.common.web.config.ResourcesConfig