Fix image editing bug: ensure edits persist and upload correctly

Critical fixes for image editing workflow:

1. Keep local edited files as backup (don't delete after server upload)
   - Server may not process upload immediately
   - Keeps edits safe locally in case server fails
   - Prevents loss of edited images

2. Include original filename in metadata sent to server
   - Server needs to know which file was edited
   - Allows proper tracking and versioning

3. Improved error logging for server upload
   - Now logs detailed errors (404, 401, timeout, connection)
   - Shows clear messages when server doesn't support endpoint
   - Helps diagnose why edits aren't syncing to server

4. Better user feedback during save
   - Shows 'Saved to device' status first
   - Then 'Upload in progress' to show server sync happening
   - Clarifies local vs server save status

Bug symptoms fixed:
- Edited images now persist locally after restart
- Server upload now sends correct file information
- Clear error messages if server upload fails
- User understands 'local save' vs 'server sync' steps

media/edited_media/2026efvev-1428673176_e_v1_metadata.json

@@ -0,0 +1,8 @@
+{
+  "time_of_modification": "2026-01-17T21:40:13.194566",
+  "original_name": "2026efvev-1428673176.jpg",
+  "new_name": "2026efvev-1428673176_e_v1.jpg",
+  "original_path": "/home/pi/Desktop/Kiwy-Signage/media/2026efvev-1428673176.jpg",
+  "version": 1,
+  "user_card_data": "0007206239"
+}