fix(sketch): handle empty and newline inputs in SketchInputListener

- Trim user input once and reuse it for checks and processing.
- Add explicit check for newline input to prevent unnecessary processing.
- Update compiled input to use trimmed input for consistency.

Author: phodal

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

@@ -15,6 +15,7 @@ import com.intellij.openapi.Disposable
 import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.application.invokeLater
 import com.intellij.openapi.application.runReadAction
+import com.intellij.openapi.diagnostic.logger
 import com.intellij.openapi.project.Project
 import kotlinx.coroutines.cancel
 import kotlinx.coroutines.flow.cancellable
@@ -61,6 +62,11 @@ open class SketchInputListener(
         if (input.isEmpty() || input.isBlank()) return
         if (input == "\n") return
 
+        // if length < 10, logger for debug
+        if (input.length < 10) {
+            logger<SketchInputListener>().debug("Input.length < 10: $input")
+        }
+
         ApplicationManager.getApplication().invokeLater {
             val devInProcessor = LanguageProcessor.devin()
             val compiledInput = runReadAction { devInProcessor?.compile(project, input) } ?: input