Add ref=huggingface tracking to human-facing links

README.md

@@ -16,7 +16,7 @@ language:
 
 > Compare GPT-4o vs Claude vs Gemini vs DeepSeek — same prompt, same API, side by side.
 
-One of the biggest advantages of [Crazyrouter](https://crazyrouter.com) is the ability to test multiple models instantly. No separate accounts, no different SDKs. Just change the model name.
+One of the biggest advantages of [Crazyrouter](https://crazyrouter.com/?ref=huggingface) is the ability to test multiple models instantly. No separate accounts, no different SDKs. Just change the model name.
 
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@@ -213,7 +213,7 @@ for model, price in PRICING.items():
 
 ## Links
 
-- 🌐 [Crazyrouter](https://crazyrouter.com)
+- 🌐 [Crazyrouter](https://crazyrouter.com/?ref=huggingface)
 - 📖 [Getting Started](https://huggingface.co/xujfcn/Crazyrouter-Getting-Started)
 - 🔗 [LangChain Guide](https://huggingface.co/xujfcn/Crazyrouter-LangChain-Guide)
 - 💰 [Pricing](https://huggingface.co/spaces/xujfcn/Crazyrouter-Pricing)