Add startup logging for API key debugging

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app.py

@@ -6,6 +6,15 @@ import gradio as gr
 import anthropic
 import os
 
+# Debug: Print env var names containing relevant keywords at startup
+print("=== STARTUP: Checking for API key ===")
+relevant_keys = [k for k in os.environ.keys() if any(x in k.lower() for x in ['api', 'key', 'anthrop', 'secret', 'token'])]
+print(f"  Relevant env var NAMES found: {relevant_keys}")
+api_key = os.environ.get("ANTHROPIC_API_KEY") or os.environ.get("anthropic_key")
+print(f"  ANTHROPIC_API_KEY exists: {bool(os.environ.get('ANTHROPIC_API_KEY'))}")
+print(f"  anthropic_key exists: {bool(os.environ.get('anthropic_key'))}")
+print("=== END STARTUP CHECK ===")
+
 # ============ CONSTANTS ============
 
 NEEDS_LIST = {