hungtran24 5c61227e6f fix: drop temperature from AI requests and make the trial scenario editable
- gpt-6-luna on AIHub rejects temperature=0 (HTTP 400), which made every
  call without reasoning_effort fall back; no longer send temperature.
- Fixtures page edits the scenario as JSON instead of a fixed preview;
  backend validation errors are shown.
- AI profile form keeps submitted values after a trial run.
- Record the live AIHub check in the spec and README.
2026-10-09 08:32:19 +07:00
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