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+# Server
+PORT=3000
+ADMIN_KEY=your-admin-key-here
+
+# AI ROI Estimator (OpenAI-compatible API)
+AI_API_URL=https://integrate.api.nvidia.com/v1
+AI_API_KEY=your_nvidia_api_key_here
+AI_MODEL=qwen/qwen3.5-397b-a17b
+# Set to 'true' to enable detailed AI prompt/response logging
+AI_DEBUG=false
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