FIX: Improve deleted file cleanup mechanism and prevent empty editor windows

Root Cause Analysis:
- Generic error handling in main-axios.ts was stripping fileNotFound data from 404 responses
- Windows were being created before error detection, showing empty editors with "File is empty"
- Error message translation was not properly detecting various file-not-found scenarios

Core Fixes:
1. **Preserve 404 Error Data:** Modified readSSHFile to preserve fileNotFound information
   - Create custom error object for 404 responses
   - Set isFileNotFound flag to bypass generic error handling
   - Maintain original response data for proper error detection

2. **Enhanced Error Detection:** Improved FileWindow error detection logic
   - Check for custom isFileNotFound flag
   - Detect multiple error message patterns: "File not found", "Resource not found"
   - Handle both backend-specific and generic error formats

3. **Prevent Empty Windows:** Auto-close window when file cleanup occurs
   - Call closeWindow(windowId) immediately after cleanup
   - Return early to prevent showing empty editor
   - Show only the cleanup notification toast

Behavior Changes:
- **Before:** Opens empty editor + shows "Server error occurred" + displays "File is empty"
- **After:** Shows "File removed from recent/pinned lists" + closes window immediately
- **Result:** Clean, user-friendly experience with automatic cleanup

Technical Details:
- Enhanced readSSHFile error handling for 404 status codes
- Improved error pattern matching for various "not found" scenarios
- Window lifecycle management during error states
- Preserved backward compatibility for other error types

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/ui/Desktop/Apps/File Manager/components/FileWindow.tsx

@@ -200,16 +200,23 @@ export function FileWindow({
           // Check if file not found (common error messages from cat command)
           const errorMessage = errorData?.error || error.message || "Unknown error";
           const isFileNotFound =
+            (error as any).isFileNotFound ||
             errorData?.fileNotFound ||
             error.response?.status === 404 ||
+            errorMessage.includes("File not found") ||
             errorMessage.includes("No such file or directory") ||
             errorMessage.includes("cannot access") ||
-            errorMessage.includes("not found");
+            errorMessage.includes("not found") ||
+            errorMessage.includes("Resource not found");
 
           if (isFileNotFound && onFileNotFound) {
             // Notify parent component about the missing file for cleanup
             onFileNotFound(file);
             toast.error(t("fileManager.fileNotFoundAndRemoved", { name: file.name }));
+
+            // Close this window since the file doesn't exist
+            closeWindow(windowId);
+            return; // Exit early to prevent showing empty editor
           } else {
             toast.error(t("fileManager.failedToLoadFile", {
               error: errorMessage.includes("Server error occurred") ?

src/ui/main-axios.ts

@@ -1051,7 +1051,14 @@ export async function readSSHFile(
       params: { sessionId, path },
     });
     return response.data;
-  } catch (error) {
+  } catch (error: any) {
+    // Preserve fileNotFound information for 404 errors
+    if (error.response?.status === 404) {
+      const customError = new Error("File not found");
+      (customError as any).response = error.response;
+      (customError as any).isFileNotFound = error.response.data?.fileNotFound || true;
+      throw customError;
+    }
     handleApiError(error, "read SSH file");
   }
 }