feat: 添加 MyBatis-Plus 多租户配置，自动注入行级数据隔离

pom.xml

@@ -142,7 +142,7 @@
                     <forceJavacCompilerUse>true</forceJavacCompilerUse>
                     <source>17</source>
                     <target>17</target>
-                    <compilerArgs>--enable-preview</compilerArgs>
+                    
                     <annotationProcessorPaths>
                         <path>
                             <groupId>org.projectlombok</groupId>

src/main/java/com/guo/learningprogresstracker/config/MybatisPlusConfig.java

@@ -0,0 +1,54 @@
+package com.guo.learningprogresstracker.config;
+
+import cn.dev33.satoken.stp.StpUtil;
+import net.sf.jsqlparser.expression.StringValue;
+import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
+import com.baomidou.mybatisplus.extension.plugins.inner.TenantLineInnerInterceptor;
+import com.baomidou.mybatisplus.extension.plugins.handler.TenantLineHandler;
+import net.sf.jsqlparser.expression.Expression;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * MyBatis-Plus 多租户配置
+ * 利用 TenantLineInnerInterceptor 自动在 SELECT/UPDATE/DELETE 语句中
+ * 注入 WHERE created_by = #{当前登录用户}，实现行级数据隔离。
+ */
+@Configuration
+public class MybatisPlusConfig {
+
+    /**
+     * 不需要租户过滤的表（仅排除不含 created_by 的系统表）
+     */
+    private static final List<String> EXCLUDE_TABLES = Arrays.asList(
+            "user",
+            "flyway_schema_history",
+            "databasechangelog",
+            "databasechangeloglock"
+    );
+
+    @Bean
+    public MybatisPlusInterceptor mybatisPlusInterceptor() {
+        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
+        interceptor.addInnerInterceptor(new TenantLineInnerInterceptor(new TenantLineHandler() {
+            @Override
+            public Expression getTenantId() {
+                return new StringValue(StpUtil.getLoginIdAsString());
+            }
+
+            @Override
+            public String getTenantIdColumn() {
+                return "created_by";
+            }
+
+            @Override
+            public boolean ignoreTable(String tableName) {
+                return EXCLUDE_TABLES.contains(tableName.toLowerCase());
+            }
+        }));
+        return interceptor;
+    }
+}