Fix startup: show errors visibly, skip premature env tests

The test_environment check was failing because it tried to verify
ChromaDB files before the generator had a chance to download them
from the HF dataset. Now errors are displayed with st.stop() so
the page doesn't silently show nothing.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app.py

@@ -4,7 +4,6 @@ import streamlit as st
 from src.generator.generator import LyricGenerator
 from config.settings import Settings
 from pathlib import Path
-from scripts.test_environment import test_environment
 from datetime import datetime
 
 # Set Hugging Face cache directory to persistent storage
@@ -76,28 +75,24 @@ def main():
     # Only run startup once per session
     if 'initialized' not in st.session_state:
         print("===== Application Startup at", datetime.now().strftime("%Y-%m-%d %H:%M:%S"), "=====\n")
-        
-        # Run environment tests if in HuggingFace
-        if Settings.is_huggingface():
-            print("\n=== Running Environment Tests ===")
-            tests_passed = test_environment()
-            if not tests_passed:
-                st.error("⚠️ Environment tests failed. Check the logs for details.")
-                return
-            print("✓ Environment tests passed")
-        
+
         # Initialize generator
         try:
-            print("\n=== Initializing Generator ===")
-            generator = LyricGenerator()
-            st.session_state.generator = generator
-            st.session_state.chat_history = []
-            st.session_state.current_lyrics = None
-            st.session_state.initialized = True
+            with st.status("Initializing generator...", expanded=True) as status:
+                st.write("Setting up LyricGenerator...")
+                print("\n=== Initializing Generator ===")
+                generator = LyricGenerator()
+                st.session_state.generator = generator
+                st.session_state.chat_history = []
+                st.session_state.current_lyrics = None
+                st.session_state.initialized = True
+                status.update(label="Generator ready!", state="complete")
         except Exception as e:
             st.error(f"Error initializing generator: {str(e)}")
             print(f"Error: {str(e)}")
-            return
+            import traceback
+            traceback.print_exc()
+            st.stop()
     
     # Check OpenAI API key at startup
     if Settings.is_huggingface():