bad save extraction

**Context**
Saving after extraction is essential if the user wants to correct the label description later. However. sometimes the save doesn't work very well.

**Outcome**
Make post-extraction save reliable and predictable: all edited fields are saved together, or none are saved, with clear user feedback on success/failure.

**Acceptance Criteria**

- [ ] A single Save action must never result in partially saved data.
- [ ] If save fails, no changes from that attempt are persisted.
- [ ] If save succeeds, all edited values are persisted and still correct after page refresh.
- [ ] The save works most of the time
- [ ] UI shows clear feedback:
- [ ] success confirmation on success
- [ ] actionable error message with retry on failure.
- [ ] Test success atomicity, partial failure path and regression case for the reported label scenario

**Additional Information** (Optional)

In example with the label_034 :