fix(devtools): trim input text in chat panels

- Trim input text in NormalChatCodingPanel and SketchToolWindow
- Prevent leading and trailing whitespace in user input
- Improve consistency and reduce potential errors in code execution

Author: phodal

core/src/main/kotlin/cc/unitmesh/devti/gui/chat/NormalChatCodingPanel.kt

@@ -295,7 +295,7 @@ class NormalChatCodingPanel(private val chatCodingService: ChatCodingService, va
     }
 
     fun setInput(trimMargin: String) {
-        inputSection.text = trimMargin
+        inputSection.text = trimMargin.trim()
         this.focusInput()
     }
 

core/src/main/kotlin/cc/unitmesh/devti/sketch/SketchToolWindow.kt

@@ -264,7 +264,7 @@ open class SketchToolWindow(
     }
 
     fun setInput(text: String) {
-        inputSection.text = text
+        inputSection.text = text.trim()
     }
 
     fun createSingleTextView(text: String, language: String = "markdown"): DialogPanel {
@@ -420,7 +420,7 @@ open class SketchToolWindow(
     }
 
     fun sendInput(text: String) {
-        inputSection.text += "\n" + text
+        inputSection.text += text.trim()
         ApplicationManager.getApplication().invokeLater {
             inputSection.send()
         }