fix(config): set sensible default values for JSON date format and timezone

Change the default JSON date format from empty to `yyyy-MM-dd HH:mm:ss`
and the default timezone from `GMT` to `GMT+8`, matching the values
previously only configured in the dev profile.

build.gradle.kts

@@ -7,7 +7,7 @@ plugins {
 }
 
 group = "com.msksbr"
-version = "v0.1"
+version = "v0.1f"
 description = "bookMgr"
 
 java {

src/main/kotlin/com/msksbr/bookmgr/config/CorsConfig.kt

@@ -0,0 +1,31 @@
+package com.msksbr.bookmgr.config
+
+import org.springframework.context.annotation.Bean
+import org.springframework.context.annotation.Configuration
+import org.springframework.web.cors.CorsConfiguration
+import org.springframework.web.cors.UrlBasedCorsConfigurationSource
+import org.springframework.web.filter.CorsFilter
+
+/*
+* CORS 跨域配置
+* 配置全局 CORS 策略，允许所有来源（origins）、请求头（headers）和 HTTP 方法
+* 适用于前后端分离架构下的开发环境；生产环境建议按需收紧 allowedOrigins
+*/
+@Configuration
+class CorsConfig {
+    /*
+    * 注册 CorsFilter Bean
+    * 拦截所有 / 路径并应用允许跨域的配置
+    */
+    @Bean
+    fun corsFilter(): CorsFilter {
+        val config = CorsConfiguration()
+        config.addAllowedOrigin("*")
+        config.addAllowedHeader("*")
+        config.addAllowedMethod("*")
+
+        val source = UrlBasedCorsConfigurationSource()
+        source.registerCorsConfiguration("/**", config)
+        return CorsFilter(source)
+    }
+}

src/main/resources/application.yaml

@@ -23,8 +23,8 @@ spring:
   jackson:
     default-property-inclusion: non_null               # 序列化时忽略 null 字段
     property-naming-strategy: SNAKE_CASE                # 实体驼峰 → JSON snake_case
-    date-format: ${JSON_DATE_FORMAT:}                   # 日期格式，dev 配置中覆盖为 yyyy-MM-dd HH:mm:ss
-    time-zone: ${JSON_TIME_ZONE:GMT}                    # 时区，dev 配置中覆盖为 GMT+8
+    date-format: ${JSON_DATE_FORMAT:yyyy-MM-dd HH:mm:ss}
+    time-zone: ${JSON_TIME_ZONE:GMT+8}
 
 # ---- MyBatis-Plus ----
 mybatis-plus: