feat(non-loanable-devices): implement non-loanable device management

- Add non_loanable_devices table to database schema
- Add web interface routes: /non_loanable_devices, /add_non_loanable_device, /edit_non_loanable_device, /delete_non_loanable_device
- Add CLI menu options 8-10 for non-loanable device management
- Add templates for non-loanable device CRUD operations
- Update README.md with new feature documentation
- Update REQUIREMENTS.md marking non-loanable devices as implemented
- Add gestiontablets.sh script

Implements: #porDefinir Registrar nuevos dispositivos no prestables

app.py

@@ -63,6 +63,22 @@ def init_db():
             )
         ''')
         
+        # Create non_loanable_devices table for devices that cannot be loaned
+        cursor.execute('''
+            CREATE TABLE IF NOT EXISTS non_loanable_devices (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                brand TEXT NOT NULL,
+                model TEXT NOT NULL,
+                serial_number TEXT UNIQUE NOT NULL,
+                device_type TEXT NOT NULL,
+                location TEXT,
+                status TEXT DEFAULT 'available',
+                notes TEXT,
+                purchase_date TEXT,
+                purchase_cost REAL
+            )
+        ''')
+        
         conn.commit()
 
 @app.route('/')
@@ -319,6 +335,99 @@ def user_loans():
     return render_template('user_loans.html', users_with_loans=user_loans_list)
 
 
+@app.route('/non_loanable_devices')
+def non_loanable_devices():
+    """Show all non-loanable devices"""
+    with get_db() as conn:
+        cursor = conn.cursor()
+        cursor.execute("SELECT * FROM non_loanable_devices ORDER BY device_type, brand, model")
+        devices = cursor.fetchall()
+    
+    return render_template('non_loanable_devices.html', devices=devices)
+
+
+@app.route('/add_non_loanable_device', methods=['GET', 'POST'])
+def add_non_loanable_device():
+    """Add a new non-loanable device to inventory"""
+    if request.method == 'POST':
+        brand = request.form['brand']
+        model = request.form['model']
+        serial_number = request.form['serial_number']
+        device_type = request.form['device_type']
+        location = request.form['location']
+        notes = request.form['notes']
+        purchase_date = request.form.get('purchase_date', '')
+        purchase_cost = request.form.get('purchase_cost', '')
+        
+        try:
+            with get_db() as conn:
+                cursor = conn.cursor()
+                cursor.execute('''
+                    INSERT INTO non_loanable_devices 
+                    (brand, model, serial_number, device_type, location, status, notes, purchase_date, purchase_cost)
+                    VALUES (?, ?, ?, ?, ?, 'available', ?, ?, ?)
+                ''', (brand, model, serial_number, device_type, location, notes, purchase_date, purchase_cost))
+                conn.commit()
+                flash('Non-loanable device added successfully!', 'success')
+        except sqlite3.IntegrityError:
+            flash('Error: Serial number already exists!', 'error')
+        
+        return redirect(url_for('non_loanable_devices'))
+    
+    return render_template('add_non_loanable_device.html')
+
+
+@app.route('/edit_non_loanable_device/<int:device_id>', methods=['GET', 'POST'])
+def edit_non_loanable_device(device_id):
+    """Edit a non-loanable device"""
+    with get_db() as conn:
+        cursor = conn.cursor()
+        cursor.execute("SELECT * FROM non_loanable_devices WHERE id = ?", (device_id,))
+        device = cursor.fetchone()
+        
+        if not device:
+            flash('Error: Device not found!', 'error')
+            return redirect(url_for('non_loanable_devices'))
+        
+        if request.method == 'POST':
+            brand = request.form['brand']
+            model = request.form['model']
+            serial_number = request.form['serial_number']
+            device_type = request.form['device_type']
+            location = request.form['location']
+            status = request.form['status']
+            notes = request.form['notes']
+            purchase_date = request.form.get('purchase_date', '')
+            purchase_cost = request.form.get('purchase_cost', '')
+            
+            try:
+                cursor.execute('''
+                    UPDATE non_loanable_devices SET
+                    brand = ?, model = ?, serial_number = ?, device_type = ?,
+                    location = ?, status = ?, notes = ?, purchase_date = ?, purchase_cost = ?
+                    WHERE id = ?
+                ''', (brand, model, serial_number, device_type, location, status, notes, purchase_date, purchase_cost, device_id))
+                conn.commit()
+                flash('Device updated successfully!', 'success')
+                return redirect(url_for('non_loanable_devices'))
+            except sqlite3.IntegrityError:
+                flash('Error: Serial number already exists!', 'error')
+        
+        return render_template('edit_non_loanable_device.html', device=device)
+
+
+@app.route('/delete_non_loanable_device/<int:device_id>')
+def delete_non_loanable_device(device_id):
+    """Delete a non-loanable device"""
+    with get_db() as conn:
+        cursor = conn.cursor()
+        cursor.execute("DELETE FROM non_loanable_devices WHERE id = ?", (device_id,))
+        conn.commit()
+        flash('Device deleted successfully!', 'success')
+    
+    return redirect(url_for('non_loanable_devices'))
+
+
 if __name__ == '__main__':
     # Initialize database
     init_db()