docs: Add Crown Commend API endpoints and environment variables to README

README.md

@@ -94,6 +94,10 @@ backend/
 | POST | `/api/youtube/analyze` | Analyze YouTube video |
 | POST | `/api/data/augment/audio` | Audio augmentation |
 | POST | `/api/data/augment/image` | Image augmentation |
+| GET | `/api/commend/health` | Crown Commend health check |
+| POST | `/api/commend/generate` | Generate AI comment for YouTube |
+| POST | `/api/commend/post` | Post comment to YouTube |
+| GET | `/api/commend/styles` | Get available comment styles |
 
 ### POST /api/youtube/analyze
 
@@ -132,6 +136,8 @@ Response:
 | `CROWNCODE_API_TIMEOUT_SEC` | `30` | External service timeout |
 | `SES_ANALIZI_THRESHOLD` | `0.5` | Authenticity score threshold |
 | `LOG_LEVEL` | `INFO` | Logging level |
+| `COMMEND_GEMINI_API_KEY` | - | Gemini API key for Crown Commend |
+| `COMMEND_TOKEN_JSON` | - | YouTube OAuth token JSON for posting |
 
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