Upload README.md

README.md

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+# NPS Assurance — Gradio UI
+## Installation rapide (Windows)
+```powershell
+python -m venv .venv; .\.venv\Scripts\Activate.ps1
+pip install -r requirements-min.txt
+python app_gradio_nps.py
+```
+## Option IA (OpenAI + HF)
+```powershell
+pip install -r requirements-full.txt
+# clé : setx OPENAI_API_KEY "ta_cle"
+python app_gradio_nps.py
+```
+## CSV attendu
+- colonnes : `comment`, `nps_score`, `id` (optionnel)