improvement/v2/automate/tweaks (#4293)

- [x] Cleanup Automation output name garbage			
- [x] Remove Cross button on first two tools			
- [x] Automation creation name title to make clearer to the user
- [x] Colours for dark mode on automation tool settings are bad 	
- [x] Fix tool names not using correct translated ones 
- [x] suggested Automation Password needs adding to description 
- [x] Allow different filetypes in automation
- [x] Custom Icons for automation
- [x] split Tool wasn't working with merge to single pdf

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Co-authored-by: Connor Yoh <[email protected]>
Co-authored-by: James Brunton <[email protected]>

frontend/src/hooks/tools/shared/useToolOperation.ts

@@ -156,10 +156,16 @@ export const useToolOperation = <TParams = void>(
 
           const response = await axios.post(endpoint, formData, { responseType: 'blob' });
 
-          // Multi-file responses are typically ZIP files that need extraction
+          // Multi-file responses are typically ZIP files that need extraction, but some may return single PDFs
           if (config.responseHandler) {
             // Use custom responseHandler for multi-file (handles ZIP extraction)
             processedFiles = await config.responseHandler(response.data, validFiles);
+          } else if (response.data.type === 'application/pdf' || 
+                     (response.headers && response.headers['content-type'] === 'application/pdf')) {
+            // Single PDF response (e.g. split with merge option) - use original filename
+            const originalFileName = validFiles[0]?.name || 'document.pdf';
+            const singleFile = new File([response.data], originalFileName, { type: 'application/pdf' });
+            processedFiles = [singleFile];
           } else {
             // Default: assume ZIP response for multi-file endpoints
             processedFiles = await extractZipFiles(response.data);