feat(portal): 案例数据 SQL 与成功案例展示优化

- 新增/更新案例相关 SQL（初始化或补丁脚本）
- 首页精选案例：多卡轮播、非精选补足列表、工业风卡片
- 案例列表：无封面时深蓝工业风占位（客户水印与缩写铭牌）

server/src/main/java/com/wuhansaga/server/common/GlobalExceptionHandler.java

@@ -1,10 +1,13 @@
 package com.wuhansaga.server.common;
 
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
 import org.springframework.validation.BindException;
 import org.springframework.web.bind.MethodArgumentNotValidException;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.RestControllerAdvice;
+import org.springframework.web.servlet.resource.NoResourceFoundException;
 
 @Slf4j
 @RestControllerAdvice
@@ -34,6 +37,12 @@ public class GlobalExceptionHandler {
         return R.fail(400, message);
     }
 
+    @ExceptionHandler(NoResourceFoundException.class)
+    public ResponseEntity<Void> handleNoResourceFound(NoResourceFoundException e) {
+        log.debug("静态资源未找到: {}", e.getResourcePath());
+        return ResponseEntity.status(HttpStatus.NOT_FOUND).build();
+    }
+
     @ExceptionHandler(Exception.class)
     public R<Void> handleException(Exception e) {
         log.error("系统异常", e);

server/src/main/java/com/wuhansaga/server/config/WebMvcConfig.java

@@ -35,6 +35,6 @@ public class WebMvcConfig implements WebMvcConfigurer {
             absolutePath += File.separator;
         }
         registry.addResourceHandler("/uploads/**")
-                .addResourceLocations("file:" + absolutePath);
+                .addResourceLocations("file:" + absolutePath, "classpath:/static/bundled-uploads/");
     }
 }