Initial commit: Tablet lending system with user-tablet many-to-many relationship

- Database schema: tablets, users, loans (junction table)
- CLI app: minimal_app.py
- Web apps: app.py (Flask), simple_app.py (http.server)
- Features: loan management, search, user loans view, project notes
- Git structure: CONTRIBUTING.md, .gitignore

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

check_flask.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python3
+"""
+Check if Flask is available and provide installation instructions
+"""
+
+try:
+    import flask
+    print("✓ Flask is available!")
+    print("You can run the web version:")
+    print("  python3 simple_app.py")
+    print("Then open: http://localhost:8000")
+except ImportError:
+    print("✗ Flask is not installed")
+    print("\nTo install Flask:")
+    print("  pip install flask")
+    print("\nOr use the system package manager:")
+    print("  sudo apt install python3-flask")
+    print("\nYou can still use the command-line version:")
+    print("  python3 minimal_app.py")
+    print("  python3 test_app.py")