chore(07): remove deprecated bash scripts and legacy env files

backend/ai/claude.py

@@ -2,9 +2,11 @@ import os
 import anthropic
 import json
 import base64
+from ..config_loader import get_config
 
 def extract(image_bytes: bytes, prompt: str):
-    api_key = os.environ.get("CLAUDE_API_KEY")
+    config = get_config()
+    api_key = config.get("ai", {}).get("claude_api_key")
     if not api_key:
         return None