fix(devti): handle file read errors and improve null safety #352

- Improve null safety when accessing virtual files in PlannerResultSummary and DiffLangSketch
- Add error handling for file read operations in FileInsCommand
- Simplify file creation logic in DiffLangSketch

Author: phodal

core/src/main/kotlin/cc/unitmesh/devti/gui/planner/PlannerResultSummary.kt

@@ -109,7 +109,7 @@ class PlannerResultSummary(
         }
 
         override fun onAccept(change: Change) {
-            val file = change.virtualFile
+            val file = change.afterRevision?.file?.virtualFile
             val content = change.afterRevision?.content ?: change.beforeRevision?.content
 
             runWriteAction {

core/src/main/kotlin/cc/unitmesh/devti/sketch/ui/patch/DiffLangSketch.kt

@@ -109,15 +109,14 @@ class DiffLangSketch(private val myProject: Project, private var patchContent: S
     private fun createDiffPanel(patch: TextFilePatch): SingleFileDiffSketch? {
         return when {
             patch.beforeName != null -> {
-                val originFile = myProject.findFile(patch.beforeName!!)
                 /// if before file is empty, should set new code empty, it should be new file
-                    ?: LightVirtualFile(patch.beforeFileName!!, "")
+                val originFile = myProject.findFile(patch.beforeName!!)
+                    ?: LightVirtualFile(patch.beforeName!!, "")
                 createSingleFileDiffSketch(originFile, patch)
             }
 
             patch.afterName != null -> {
-                val virtualFile = myProject.findFile(patch.afterName!!)
-                    ?: LightVirtualFile(patch.afterFileName!!, "")
+                val virtualFile = myProject.findFile(patch.afterName!!) ?: LightVirtualFile(patch.afterName!!, "")
                 createSingleFileDiffSketch(virtualFile, patch)
             }
 

exts/devins-lang/src/main/kotlin/cc/unitmesh/devti/language/compiler/exec/FileInsCommand.kt

@@ -44,7 +44,12 @@ class FileInsCommand(private val myProject: Project, private val prop: String) :
             }
         }
 
-        val content = virtualFile?.readText()
+        val content = try {
+            virtualFile?.readText()
+        } catch (e: Exception) {
+            null
+        }
+
         if (content == null) {
             AutoDevNotifications.warn(myProject, "File not found: $prop")
             return "File not found: $prop"