Fix: Read API keys directly from environment variables

- Use os.getenv() directly instead of config object
- Add debug logging to show which clients initialize
- Show first 10 chars of key for verification
- This ensures HF Spaces secrets are properly read

src/utils/ai_client.py

@@ -3,6 +3,7 @@ AI Client Manager - Unified interface for multiple LLM providers
 Supports Anthropic Claude, Google Gemini, and OpenAI
 """
 
+import os
 from typing import Optional, Dict, Any, List
 from enum import Enum
 import anthropic
@@ -32,29 +33,39 @@ class AIClient:
 
     def _initialize_clients(self):
         """Initialize available AI clients based on API keys"""
-        # Anthropic Claude
-        if config.anthropic_api_key:
+        # Anthropic Claude - read directly from environment
+        anthropic_key = os.getenv("ANTHROPIC_API_KEY")
+        if anthropic_key:
             try:
-                self.anthropic_client = anthropic.Anthropic(
-                    api_key=config.anthropic_api_key
-                )
+                self.anthropic_client = anthropic.Anthropic(api_key=anthropic_key)
+                print(f"✅ Anthropic client initialized (key: {anthropic_key[:10]}...)")
             except Exception as e:
-                print(f"Failed to initialize Anthropic client: {e}")
+                print(f"❌ Failed to initialize Anthropic client: {e}")
+        else:
+            print("⚠️  ANTHROPIC_API_KEY not found in environment")
 
-        # Google Gemini
-        if config.google_api_key:
+        # Google Gemini - read directly from environment
+        google_key = os.getenv("GOOGLE_API_KEY")
+        if google_key:
             try:
-                genai.configure(api_key=config.google_api_key)
+                genai.configure(api_key=google_key)
                 self.google_client = genai
+                print(f"✅ Google client initialized (key: {google_key[:10]}...)")
             except Exception as e:
-                print(f"Failed to initialize Google client: {e}")
+                print(f"❌ Failed to initialize Google client: {e}")
+        else:
+            print("⚠️  GOOGLE_API_KEY not found in environment")
 
-        # OpenAI
-        if config.openai_api_key:
+        # OpenAI - read directly from environment
+        openai_key = os.getenv("OPENAI_API_KEY")
+        if openai_key:
             try:
-                self.openai_client = OpenAI(api_key=config.openai_api_key)
+                self.openai_client = OpenAI(api_key=openai_key)
+                print(f"✅ OpenAI client initialized (key: {openai_key[:10]}...)")
             except Exception as e:
-                print(f"Failed to initialize OpenAI client: {e}")
+                print(f"❌ Failed to initialize OpenAI client: {e}")
+        else:
+            print("⚠️  OPENAI_API_KEY not found in environment")
 
     def generate(
         self,