Motivation:
Users were confused by implicit configuration fallback and inconsistent category naming. The adapter also had a bug where unparsed dropdown values were sent to the API.
Implementation:
1. Re-categorized node under 'LLM'.
2. Added 'LLM_CONFIG (from input)' to provider/model dropdowns for explicit passthrough.
3. Updated default prompts to English/hello.
4. Ensured all API requests use resolved 'actual_model' instead of raw dropdown values.