Fix Anthropic client initialization error

- Update anthropic SDK to >=0.34.0 for better compatibility
- Add httpx dependency for explicit HTTP client control
- Add fallback initialization for proxies parameter issues
- Handle TypeError gracefully when initializing Anthropic client

Resolves: "Client.init() got an unexpected keyword argument 'proxies'"

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

requirements_hf.txt

@@ -2,7 +2,8 @@
 # For GPU-accelerated deployment with Be.FM model
 
 streamlit>=1.28.0
-anthropic>=0.7.0
+anthropic>=0.34.0
+httpx>=0.24.0
 pydantic>=2.0.0
 plotly>=5.17.0
 networkx>=3.1

src/llm/anthropic_client.py

@@ -40,7 +40,20 @@ class AnthropicClient:
         self.max_tokens = int(os.getenv("LLM_MAX_TOKENS", max_tokens))
         self.temperature = float(os.getenv("LLM_TEMPERATURE", temperature))
 
-        self.client = Anthropic(api_key=self.api_key)
+        # Initialize Anthropic client with explicit parameters only
+        try:
+            self.client = Anthropic(api_key=self.api_key)
+        except TypeError as e:
+            # Fallback for version compatibility issues
+            if "proxies" in str(e):
+                # Try without any httpx configuration
+                import httpx
+                self.client = Anthropic(
+                    api_key=self.api_key,
+                    http_client=httpx.Client()
+                )
+            else:
+                raise
 
     def generate_response(
         self,