Fix HF Spaces build: remove -e . from requirements, add setup.py, auto-install in app.py

app.py

@@ -6,6 +6,15 @@ Hugging Face Spaces. It initializes the models and launches the Gradio interface
 
 import os
 import subprocess
+import sys
+
+# Install the mosaic package if not already installed
+try:
+    import mosaic
+except ImportError:
+    print("Installing mosaic package...")
+    subprocess.check_call([sys.executable, "-m", "pip", "install", "-e", "."])
+    import mosaic
 
 from mosaic.gradio_app import download_and_process_models
 from mosaic.ui import launch_gradio

requirements.txt

@@ -13,4 +13,3 @@ requests>=2.31.0
 huggingface-hub>=0.20.0
 openslide-python>=1.3.0
 git+https://github.com/pathology-data-mining/Mussel.git@ray-dev
--e .

setup.py

@@ -0,0 +1,10 @@
+"""Setup script for Mosaic package."""
+from setuptools import setup, find_packages
+
+setup(
+    name="mosaic",
+    version="0.1.0",
+    package_dir={"": "src"},
+    packages=find_packages(where="src"),
+    python_requires=">=3.10",
+)