fix(components): 调整Item组件样式，修复文字溢出和间距问题

- 修改Item.vue的padding和margin样式
- 添加word-break属性防止文字溢出
- 更新相关构建文件和样式映射

.output/public/_nuxt/builds/meta/5e88c126-feef-4077-b8e8-d430d6469766.json

@@ -1 +0,0 @@
-{"id":"5e88c126-feef-4077-b8e8-d430d6469766","timestamp":1751256428624,"matcher":{"static":{},"wildcard":{},"dynamic":{}},"prerendered":[]}

.output/public/_nuxt/builds/meta/63b74da3-e2df-4980-8864-daa62b53e72b.json

@@ -0,0 +1 @@
+{"id":"63b74da3-e2df-4980-8864-daa62b53e72b","timestamp":1751264465851,"matcher":{"static":{},"wildcard":{},"dynamic":{}},"prerendered":[]}