fix: 将box-shadow替换为filter: drop-shadow以统一阴影效果

修改多个CSS/LESS文件中的阴影效果，使用filter: drop-shadow替代box-shadow，保持样式一致性。同时修复item-head.js中的API端点路径错误。

component/item-head/item-head.js

@@ -138,7 +138,7 @@ export const itemHead = defineComponent({
 
         const cutAnonymousState = (state) => {
             const target = item.value;
-            ajax("/v2/api/forum/postTopicAnonymousStatus", {
+            ajax("/v2/api/forum/setTopicAnonymousStatus", {
                 token: target.token,
                 anonymous: state,
             })

css/details.css

@@ -221,7 +221,7 @@
   height: 100px;
   background-color: #ffffff;
   border-radius: 6px;
-  box-shadow: 0px 0px 5px rgba(0, 0, 0, 0.16862745);
+  filter: drop-shadow(0px 0px 5px rgba(0, 0, 0, 0.16862745));
   flex-direction: column;
   display: none;
 }

css/details.less

@@ -255,7 +255,7 @@
                         height: 100px;
                         background-color: rgba(255, 255, 255, 1);
                         border-radius: 6px;
-                        box-shadow: 0px 0px 5px rgba(0, 0, 0, 0.168627450980392);
+                        filter: drop-shadow(0px 0px 5px rgba(0, 0, 0, 0.16862745));
                         flex-direction: column;
                         display: none;
 

css/public.css

@@ -654,7 +654,7 @@ body {
   height: 100px;
   background-color: #ffffff;
   border-radius: 6px;
-  box-shadow: 0px 0px 5px rgba(0, 0, 0, 0.16862745);
+  filter: drop-shadow(0px 0px 5px rgba(0, 0, 0, 0.16862745));
   flex-direction: column;
   display: none;
 }

css/public.less

@@ -787,7 +787,7 @@ body {
                 height: 100px;
                 background-color: rgba(255, 255, 255, 1);
                 border-radius: 6px;
-                box-shadow: 0px 0px 5px rgba(0, 0, 0, 0.168627450980392);
+                filter: drop-shadow(0px 0px 5px rgba(0, 0, 0, 0.16862745));
                 flex-direction: column;
                 display: none;