Improve compatibility and add one-click startup scripts

- Add Windows Portable Package support with auto-detection
- Fix API health check to support multiple response formats
- Fix task ID parsing for ACE-Step API integration
- Change thinking mode default to false for 4GB GPU compatibility
- Add explicit CoT parameter control for LLM features
- Fix audio download path encoding for portable package
- Improve file upload validation with extension fallback
- Add start-all.bat/sh scripts for one-click startup
- Update README with Windows Portable Package instructions
- Add comprehensive troubleshooting section
- Improve cross-platform compatibility

stop-all.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+# ACE-Step UI Stop All Services Script
+
+echo "Stopping all ACE-Step services..."
+
+if [ -f logs/api.pid ]; then
+    API_PID=$(cat logs/api.pid)
+    if kill -0 $API_PID 2>/dev/null; then
+        echo "Stopping API server (PID: $API_PID)..."
+        kill $API_PID
+    fi
+    rm logs/api.pid
+fi
+
+if [ -f logs/backend.pid ]; then
+    BACKEND_PID=$(cat logs/backend.pid)
+    if kill -0 $BACKEND_PID 2>/dev/null; then
+        echo "Stopping backend (PID: $BACKEND_PID)..."
+        kill $BACKEND_PID
+    fi
+    rm logs/backend.pid
+fi
+
+if [ -f logs/frontend.pid ]; then
+    FRONTEND_PID=$(cat logs/frontend.pid)
+    if kill -0 $FRONTEND_PID 2>/dev/null; then
+        echo "Stopping frontend (PID: $FRONTEND_PID)..."
+        kill $FRONTEND_PID
+    fi
+    rm logs/frontend.pid
+fi
+
+echo "All services stopped!"