Correct a Simplesat answer without touching anything else

**Objective:** Correct the Simplesat answer {answer-id}, setting its comment to {new-comment} and its choice to {new-choice}, but only after the current values have been shown and the change confirmed.

**Step 1: Read the answer as it stands**

Call `simplesat-get-answer` with id set to {answer-id}. Report the current choice, choice_label, sentiment and created date. If nothing comes back, stop: the id is wrong, and nothing should be written.

**Step 2: Show the change and ask**

Present a before and after for each field being changed, and only for those fields. Ask the user to confirm in plain words. Do not proceed on silence or on an ambiguous reply.

**Step 3: Write the correction**

Once confirmed, call `simplesat-update-answer` exactly once, with id set to {answer-id} and only the fields the user supplied. Do not send a field that was left blank, and do not call the tool a second time for any reason.

**Step 4: Confirm**

Call `simplesat-get-answer` again with the same id and report the stored values, so the user sees what actually landed rather than what was requested.

**Rules & Guidelines:**

* `simplesat-update-answer` is the only tool here that may write, it may be called once, and only after an explicit confirmation in Step 2.
* Do NOT call `simplesat-add-customer` or `simplesat-send-survey-email` from this prompt.
* Do not rewrite the customer's comment into better English. Store what was given.
* If neither {new-comment} nor {new-choice} is supplied there is nothing to write. Say so and stop before Step 2.

**Validation:**

* If {answer-id} is blank, ask for it and stop.
* If Step 1 returns more than one record, stop and report it: the id is not behaving as an identifier and a write would be unsafe.
* If Step 4 shows a value that does not match what was confirmed, say so plainly and do not retry the write.