mqtt模块新增智能插座开关，websocket模块

pdf生成功能

pom.xml

@@ -39,11 +39,10 @@
         <logback.version>1.2.13</logback.version>
         <spring-security.version>5.7.14</spring-security.version>
         <spring-framework.version>5.3.39</spring-framework.version>
-
-        <!-- ========== 新增：统一版本管理（只加这3个） ========== -->
         <lombok.version>1.18.32</lombok.version>
         <paho.mqtt.version>1.2.5</paho.mqtt.version>
         <slf4j.version>1.7.36</slf4j.version>
+        <itext.version>7.2.5</itext.version>
     </properties>
 
     <dependencies>
@@ -237,9 +236,8 @@
             </exclusions>
         </dependency>
 
-        <!-- ================== 只新增这3个依赖 ================== -->
 
-        <!-- 1) SLF4J（你要求显式加；版本走 properties） -->
+        <!-- 1) SLF4J -->
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
@@ -281,6 +279,24 @@
             <version>3.5.3</version>
         </dependency>
 
+        <!-- WebSocket -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-websocket</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>com.itextpdf</groupId>
+            <artifactId>kernel</artifactId>
+            <version>${itext.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.itextpdf</groupId>
+            <artifactId>layout</artifactId>
+            <version>${itext.version}</version>
+        </dependency>
+
     </dependencies>
 
     <build>