refactor(live-stream): further streamline input and table components

- Continued to optimize the structure of input fields and table components in the live stream view for enhanced readability.
- Consolidated multiple lines of code into single lines where applicable, improving visual clarity and consistency.
- Ensured existing functionality remains intact while enhancing the overall user experience.

src/views/live-stream/index.vue

@@ -439,7 +439,7 @@
                     </div>
                     <div class="ptz-btn" @mousedown="handlePTZ('DOWN_RIGHT')">
                       <el-icon size="24">
-                        <Icon icon="mdi:arrow-down-right" width="24" height="24" />
+                        <Icon icon="mdi:arrow-bottom-right" width="24" height="24" />
                       </el-icon>
                     </div>
                   </div>
@@ -2866,7 +2866,7 @@ onMounted(async () => {
   display: grid;
   grid-template-columns: repeat(3, 1fr);
   gap: 6px;
-  margin-bottom: 12px;
+  margin: 12px;
 }
 
 .ptz-btn {