From ec79bc2ca366faf89770463121e0750768e873d2 Mon Sep 17 00:00:00 2001
From: ijuanes <ijuanes@hackercachy>
Date: Thu, 4 Jun 2026 01:00:17 +0100
Subject: [PATCH 1/5] feat(loans): add search and expandable past loans to user
 loans view
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- Add search box to filter by user name, ID, tablet brand/model/serial
- Split loans into Current Loans (always visible) and Past Loans (collapsible)
- Past loans toggle with ▶/▼ indicator showing count
- All searchable data embedded in data-search attributes

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>
---
 templates/user_loans.html | 182 +++++++++++++++++++++++++++++++-------
 1 file changed, 150 insertions(+), 32 deletions(-)

diff --git a/templates/user_loans.html b/templates/user_loans.html
index 8c10045..07fac86 100644
--- a/templates/user_loans.html
+++ b/templates/user_loans.html
@@ -7,45 +7,98 @@
         This page demonstrates the many-to-many relationship between users and tablets via the loans table.
     </p>
     
-    <div class="user-loans-container">
+    <!-- Search Box -->
+    <div class="search-container">
+        <input type="text" id="searchInput" placeholder="Search by user name, identification, tablet brand, model, or serial number..." 
+               onkeyup="filterUsers()">
+        <button onclick="clearSearch()" class="btn btn-clear">Clear</button>
+    </div>
+    
+    <div class="user-loans-container" id="userLoansContainer">
         {% for user_data in users_with_loans %}
             {% set user = user_data.user %}
             {% set loans = user_data.loans %}
+            {% set active_loans = loans|selectattr('status', 'equalto', 'active')|list %}
+            {% set returned_loans = loans|selectattr('status', 'equalto', 'returned')|list %}
             
-            <div class="user-card">
+            <div class="user-card" 
+                 data-search="{{ user.name|lower }} {{ user.identification|lower }} {% for loan in loans %}{{ loan.brand|lower }} {{ loan.model|lower }} {{ loan.serial_number|lower }} {% endfor %}">
                 <div class="user-header">
                     <h3>{{ user.name }} ({{ user.identification }})</h3>
-                    <span class="loan-count">{{ loans|length }} tablet{{ 's' if loans|length != 1 else '' }} loaned</span>
+                    <span class="loan-count">
+                        {{ active_loans|length }} active, {{ returned_loans|length }} past
+                    </span>
                 </div>
                 
-                {% if loans %}
-                    <table class="loans-table">
-                        <thead>
-                            <tr>
-                                <th>Tablet</th>
-                                <th>Serial Number</th>
-                                <th>Loan Date</th>
-                                <th>Return Date</th>
-                                <th>Status</th>
-                            </tr>
-                        </thead>
-                        <tbody>
-                            {% for loan in loans %}
-                                <tr class="loan-row status-{{ loan.status }}">
-                                    <td>{{ loan.brand }} {{ loan.model }}</td>
-                                    <td>{{ loan.serial_number }}</td>
-                                    <td>{{ loan.loan_date }}</td>
-                                    <td>{{ loan.return_date or '-' }}</td>
-                                    <td>
-                                        <span class="status-badge status-{{ loan.status }}">
-                                            {{ loan.status }}
-                                        </span>
-                                    </td>
+                {% if active_loans %}
+                    <div class="loans-section current-loans">
+                        <h4>Current Loans</h4>
+                        <table class="loans-table">
+                            <thead>
+                                <tr>
+                                    <th>Tablet</th>
+                                    <th>Serial Number</th>
+                                    <th>Loan Date</th>
+                                    <th>Status</th>
                                 </tr>
-                            {% endfor %}
-                        </tbody>
-                    </table>
-                {% else %}
+                            </thead>
+                            <tbody>
+                                {% for loan in active_loans %}
+                                    <tr class="loan-row status-{{ loan.status }}">
+                                        <td>{{ loan.brand }} {{ loan.model }}</td>
+                                        <td>{{ loan.serial_number }}</td>
+                                        <td>{{ loan.loan_date }}</td>
+                                        <td>
+                                            <span class="status-badge status-{{ loan.status }}">
+                                                {{ loan.status }}
+                                            </span>
+                                        </td>
+                                    </tr>
+                                {% endfor %}
+                            </tbody>
+                        </table>
+                    </div>
+                {% endif %}
+                
+                {% if returned_loans %}
+                    <div class="loans-section past-loans">
+                        <h4>
+                            <button class="expand-toggle" onclick="togglePastLoans(this)">
+                                ▶ Past Loans ({{ returned_loans|length }})
+                            </button>
+                        </h4>
+                        <div class="past-loans-content" style="display: none;">
+                            <table class="loans-table">
+                                <thead>
+                                    <tr>
+                                        <th>Tablet</th>
+                                        <th>Serial Number</th>
+                                        <th>Loan Date</th>
+                                        <th>Return Date</th>
+                                        <th>Status</th>
+                                    </tr>
+                                </thead>
+                                <tbody>
+                                    {% for loan in returned_loans %}
+                                        <tr class="loan-row status-{{ loan.status }}">
+                                            <td>{{ loan.brand }} {{ loan.model }}</td>
+                                            <td>{{ loan.serial_number }}</td>
+                                            <td>{{ loan.loan_date }}</td>
+                                            <td>{{ loan.return_date or '-' }}</td>
+                                            <td>
+                                                <span class="status-badge status-{{ loan.status }}">
+                                                    {{ loan.status }}
+                                                </span>
+                                            </td>
+                                        </tr>
+                                    {% endfor %}
+                                </tbody>
+                            </table>
+                        </div>
+                    </div>
+                {% endif %}
+                
+                {% if not active_loans and not returned_loans %}
                     <p class="no-loans">No loans recorded for this user.</p>
                 {% endif %}
             </div>
@@ -56,6 +109,32 @@
         {% endif %}
     </div>
 
+    <script>
+        function filterUsers() {
+            const search = document.getElementById('searchInput').value.toLowerCase();
+            const cards = document.querySelectorAll('.user-card');
+            
+            cards.forEach(card => {
+                const searchText = card.getAttribute('data-search') || '';
+                card.style.display = searchText.includes(search) ? '' : 'none';
+            });
+        }
+        
+        function clearSearch() {
+            document.getElementById('searchInput').value = '';
+            filterUsers();
+        }
+        
+        function togglePastLoans(button) {
+            const content = button.closest('.loans-section').querySelector('.past-loans-content');
+            const isExpanded = content.style.display !== 'none';
+            
+            content.style.display = isExpanded ? 'none' : 'block';
+            const count = button.textContent.match(/\d+/)[0];
+            button.textContent = isExpanded ? '▶ Past Loans (' + count + ')' : '▼ Past Loans (' + count + ') ';
+        }
+    </script>
+
     <style>
         .relationship-note {
             background-color: #e8f5e9;
@@ -65,6 +144,23 @@
             border-left: 4px solid #4CAF50;
         }
         
+        .search-container {
+            margin-bottom: 20px;
+            display: flex;
+            gap: 10px;
+        }
+        
+        .search-container input {
+            flex: 1;
+            padding: 10px;
+            border: 1px solid #ddd;
+            border-radius: 4px;
+        }
+        
+        .btn-clear {
+            background-color: #999;
+        }
+        
         .user-loans-container {
             display: flex;
             flex-direction: column;
@@ -98,6 +194,28 @@
             font-style: italic;
         }
         
+        .loans-section {
+            margin-top: 15px;
+        }
+        
+        .loans-section h4 {
+            margin: 0 0 10px 0;
+            color: #555;
+        }
+        
+        .expand-toggle {
+            background: none;
+            border: none;
+            color: #4CAF50;
+            cursor: pointer;
+            font-size: 14px;
+            padding: 0;
+        }
+        
+        .expand-toggle:hover {
+            text-decoration: underline;
+        }
+        
         .loans-table {
             width: 100%;
             border-collapse: collapse;
@@ -120,7 +238,7 @@
         }
         
         .loan-row.status-returned {
-            background-color: #e8f5e9;
+            background-color: #f5f5f5;
         }
         
         .status-badge {
@@ -137,7 +255,7 @@
         }
         
         .status-badge.status-returned {
-            background-color: #4CAF50;
+            background-color: #9E9E9E;
             color: white;
         }
         

From e9862f3d8df6eba9436cf252ee444f21f29511f9 Mon Sep 17 00:00:00 2001
From: ijuanes <ijuanes@hackercachy>
Date: Thu, 4 Jun 2026 01:00:49 +0100
Subject: [PATCH 2/5] docs: add version control section to README

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>
---
 README.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/README.md b/README.md
index 58fab68..b880960 100644
--- a/README.md
+++ b/README.md
@@ -153,6 +153,17 @@ To backup your data:
 cp tablets.db tablets_backup_$(date +%Y%m%d).db
 ```
 
+## Version Control
+
+This project uses Git for version control with the following structure:
+
+- `master` - Production-ready releases
+- `develop` - Integration branch for features
+- `feature/*` - Individual feature branches
+- `hotfix/*` - Urgent bug fixes
+
+See `CONTRIBUTING.md` for detailed workflow and commit conventions.
+
 ## License
 
 This is a simple educational project. Feel free to use and modify it as needed.
\ No newline at end of file

From 5fd3aaf4c597d1ced5a5abd025a83a8328226394 Mon Sep 17 00:00:00 2001
From: ijuanes <ijuanes@hackercachy>
Date: Thu, 4 Jun 2026 10:12:18 +0100
Subject: [PATCH 3/5] docs: add Spanish requirements document
 (platform/language agnostic)

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>
---
 REQUIREMENTS.md | 210 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 210 insertions(+)
 create mode 100644 REQUIREMENTS.md

diff --git a/REQUIREMENTS.md b/REQUIREMENTS.md
new file mode 100644
index 0000000..ad421ad
--- /dev/null
+++ b/REQUIREMENTS.md
@@ -0,0 +1,210 @@
+# Requisitos del Sistema de Gestión de Préstamos de Tablets
+
+## Descripción General
+
+El sistema debe permitir la gestión del préstamo y devolución de dispositivos tablets entre un inventario y un conjunto de usuarios. El enfoque principal es el seguimiento del estado de cada dispositivo y su relación con los usuarios que los han tomado prestados.
+
+---
+
+## Requisitos Funcionales
+
+### Gestión de Dispositivos
+
+El sistema debe permitir:
+- Registrar nuevos dispositivos en el inventario
+- Identificar cada dispositivo de manera única
+- Almacenar información descriptiva de cada dispositivo (marca, modelo, número de serie)
+- Consultar el estado actual de cada dispositivo (disponible, prestado)
+
+### Gestión de Usuarios
+
+El sistema debe permitir:
+- Registrar nuevos usuarios
+- Identificar cada usuario de manera única
+- Almacenar información de contacto básica (nombre, identificación)
+- Consultar la información de los usuarios registrados
+
+### Gestión de Préstamos
+
+El sistema debe permitir:
+- Asignar un dispositivo disponible a un usuario
+- Registrar la fecha y hora del préstamo
+- Registrar la fecha y hora de la devolución
+- Consultar el historial de préstamos de un dispositivo
+- Consultar el historial de préstamos de un usuario
+- Visualizar todos los dispositivos actualmente prestados
+
+### Consulta y Reportes
+
+El sistema debe permitir:
+- Buscar dispositivos por cualquier atributo (marca, modelo, número de serie)
+- Buscar usuarios por cualquier atributo (nombre, identificación)
+- Filtrar préstamos por estado (activos, finalizados)
+- Filtrar préstamos por dispositivo
+- Filtrar préstamos por usuario
+- Ver el historial completo de préstamos y devoluciones
+
+---
+
+## Modelo de Datos
+
+### Entidades Principales
+
+1. **Dispositivo**
+   - Identificador único
+   - Marca
+   - Modelo
+   - Número de serie (único)
+   - Estado (disponible, prestado)
+
+2. **Usuario**
+   - Identificador único
+   - Nombre
+   - Identificación (única)
+
+3. **Préstamo**
+   - Identificador único
+   - Dispositivo asociado
+   - Usuario asociado
+   - Fecha de préstamo
+   - Fecha de devolución (opcional)
+   - Estado (activo, finalizado)
+
+### Relaciones
+
+- Un **usuario** puede tener **múltiples préstamos** (relación uno a muchos)
+- Un **dispositivo** solo puede estar en **un préstamo activo** a la vez
+- Un **préstamo** relaciona exactamente un dispositivo con un usuario
+- El historial de préstamos permite rastrear todos los movimientos de cada dispositivo
+
+### Reglas de Negocio
+
+1. Un dispositivo en estado "prestado" no puede ser prestado a otro usuario
+2. Un préstamo finalizado debe registrar fecha de devolución
+3. La identificación de dispositivos y usuarios debe ser única
+4. Al devolver un dispositivo, este vuelve al estado "disponible"
+
+---
+
+## Flujos de Trabajo
+
+### Registro de un Nuevo Dispositivo
+
+1. El sistema solicita la información del dispositivo (marca, modelo, número de serie)
+2. El sistema valida que el número de serie no esté registrado
+3. El sistema registra el dispositivo con estado "disponible"
+4. El sistema confirma el registro
+
+### Registro de un Nuevo Usuario
+
+1. El sistema solicita la información del usuario (nombre, identificación)
+2. El sistema valida que la identificación no esté registrada
+3. El sistema registra el usuario
+4. El sistema confirma el registro
+
+### Préstamo de un Dispositivo
+
+1. El sistema muestra los dispositivos disponibles
+2. El usuario selecciona un dispositivo
+3. El sistema muestra los usuarios registrados
+4. El usuario selecciona un usuario
+5. El sistema registra el préstamo con:
+   - Dispositivo seleccionado
+   - Usuario seleccionado
+   - Fecha y hora actual
+   - Estado "activo"
+6. El sistema actualiza el estado del dispositivo a "prestado"
+7. El sistema confirma el préstamo
+
+### Devolución de un Dispositivo
+
+1. El sistema muestra los préstamos activos
+2. El usuario selecciona un préstamo
+3. El sistema registra la fecha y hora de devolución
+4. El sistema actualiza el estado del préstamo a "finalizado"
+5. El sistema actualiza el estado del dispositivo a "disponible"
+6. El sistema confirma la devolución
+
+### Consulta de Préstamos por Usuario
+
+1. El sistema muestra la lista de usuarios
+2. El usuario selecciona un usuario
+3. El sistema muestra:
+   - Dispositivos actualmente prestados (préstamos activos)
+   - Historial de préstamos pasados (opcional: expandible)
+4. El sistema permite buscar por cualquier campo
+
+---
+
+## Requisitos No Funcionales
+
+### Usabilidad
+
+- La interfaz debe permitir búsqueda eficiente en listas grandes (500+ elementos)
+- La visualización de información debe ser clara y organizada
+- Los estados deben ser fácilmente identificables
+- Las acciones principales deben ser accesibles
+
+### Escalabilidad
+
+- El diseño debe soportar un crecimiento en el número de dispositivos y usuarios
+- La búsqueda debe ser eficiente
+- El historial debe ser consultable sin afectar el rendimiento
+
+### Mantenibilidad
+
+- La estructura de datos debe ser clara
+- Las relaciones entre entidades deben estar bien definidas
+- Los flujos de trabajo deben estar documentados
+
+---
+
+## Diseño de Interfaz (Conceptual)
+
+### Vistas Principales
+
+1. **Vista de Inventario**
+   - Lista de dispositivos
+   - Filtros por estado
+   - Búsqueda
+
+2. **Vista de Usuarios**
+   - Lista de usuarios
+   - Búsqueda
+
+3. **Vista de Préstamos Activos**
+   - Lista de préstamos en curso
+   - Filtros por dispositivo/usuario
+   - Acciones: devolver dispositivo
+
+4. **Vista de Historial**
+   - Lista completa de préstamos
+   - Filtros por fecha, usuario, dispositivo, estado
+   - Detalles de cada préstamo
+
+5. **Vista de Préstamos por Usuario**
+   - Lista de usuarios
+   - Para cada usuario: dispositivos actualmente prestados
+   - Opcional: historial de préstamos pasados (expandible)
+
+### Elementos de Interacción
+
+- Campos de búsqueda en todas las listas
+- Botones de acción claros (Prestar, Devolver, Registrar)
+- Indicadores visuales de estado (colores, iconos)
+- Confirmación de acciones críticas
+
+---
+
+## Notas de Implementación
+
+Este documento describe los requisitos a nivel de diseño. La implementación específica (lenguaje de programación, base de datos, framework, arquitectura) queda a criterio del equipo de desarrollo y puede variar según las necesidades técnicas.
+
+Los detalles técnicos como:
+- Tecnologías específicas
+- Estructura de base de datos física
+- APIs
+- Autenticación
+- Despliegue
+
+Deberán ser definidos en la fase de diseño técnico y pueden evolucionar sin afectar los requisitos funcionales descritos aquí.

From ac73e5dc93cb3f6de07972c7bb55cac41e44e9db Mon Sep 17 00:00:00 2001
From: ijuanes <ijuanes@hackercachy>
Date: Thu, 4 Jun 2026 23:00:14 +0100
Subject: [PATCH 4/5] docs: add technical specifications document

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>
---
 TECHNICAL_SPECIFICATIONS.md | 149 ++++++++++++++++++++++++++++++++++++
 1 file changed, 149 insertions(+)
 create mode 100644 TECHNICAL_SPECIFICATIONS.md

diff --git a/TECHNICAL_SPECIFICATIONS.md b/TECHNICAL_SPECIFICATIONS.md
new file mode 100644
index 0000000..8a17aef
--- /dev/null
+++ b/TECHNICAL_SPECIFICATIONS.md
@@ -0,0 +1,149 @@
+# Especificaciones Técnicas
+
+Documento complementario a `REQUIREMENTS.md` con propuestas concretas de implementación técnica.
+
+---
+
+## 1. Concurrencia en Base de Datos
+
+| Opción | Descripción | Ventajas | Desventajas |
+|--------|-------------|---------|-------------|
+| **SQLite + WAL** | Modo Write-Ahead Logging | Zero-config, embebido, buena para <100 conexiones | Limitado a 1 escritor simultáneo |
+| **PostgreSQL** | Base de datos relacional | Concurrencia completa, transacciones ACID | Requiere servidor |
+| **Transacciones** | Aislamiento READ COMMITTED | Previene lecturas sucias | Bloqueos temporales |
+| **Locking optimista** | Versión de fila en actualizaciones | Sin bloqueos | Conflictos requieren reintento |
+
+**Recomendación**: SQLite con WAL para prototipos, PostgreSQL para producción. Usar transacciones para operaciones críticas (préstamo/devolución).
+
+---
+
+## 2. Autenticación Básica
+
+| Opción | Descripción | Complejidad |
+|--------|-------------|-------------|
+| **Sesiones (Flask)** | Cookies firmadas | Baja |
+| **JWT** | Tokens sin estado | Media |
+| **OAuth 2.0** | Delegación a proveedores | Alta |
+| **Basic Auth** | HTTP Basic Authentication | Mínima |
+
+**Flujo mínimo**:
+```
+Login (user/pass) → Session/JWT → Middleware verifica rol → Acceso a endpoints
+```
+
+**Roles sugeridos**:
+- `admin`: CRUD completo, gestión de usuarios
+- `staff`: Préstamos/devoluciones
+- `viewer`: Solo consulta
+
+---
+
+## 3. Separación Frontend/Backend
+
+| Arquitectura | Descripción | Stack Ejemplo |
+|--------------|-------------|---------------|
+| **Monolítica + Templates** | Servidor renderiza HTML | Flask+Jinja2, Django |
+| **API + SPA** | Backend API, frontend dinámico | FastAPI + React/Vue |
+| **API + SSR** | Backend API + renderizado servidor | Next.js + API |
+| **Microservicios** | Servicios independientes | Backend API + Frontend estático |
+
+**Para este proyecto**:
+- **Opción A**: Flask + Jinja2 (simple, suficiente para requisitos)
+- **Opción B**: FastAPI + React (escalable, separable)
+
+---
+
+## 4. Búsqueda Eficiente (500+ elementos)
+
+| Opción | Descripción | Implementación |
+|--------|-------------|----------------|
+| **Índices DB** | B-tree en columnas buscadas | `CREATE INDEX idx_brand ON tablets(brand)` |
+| **Búsqueda full-text** | Búsqueda en texto | SQLite FTS5, PostgreSQL tsvector |
+| **Filtrado cliente** | JavaScript filtra datos | Ideal para <2000 elementos |
+| **Paginación** | Dividir resultados | `LIMIT 50 OFFSET 0` |
+
+**Recomendación**: Índices en `serial_number`, `brand`, `model`, `user.name`, `user.identification`.
+
+---
+
+## 5. Estructura de Proyecto Propuesta
+
+```
+project/
+├── backend/
+│   ├── models/          # Entidades (Device, User, Loan)
+│   ├── services/        # Lógica de negocio
+│   ├── repositories/    # Acceso a datos
+│   ├── routes/          # Endpoints/API
+│   └── app.py           # Configuración
+├── frontend/           # Opcional para opción B
+│   ├── public/
+│   └── src/
+├── migrations/         # Control de cambios DB
+├── tests/
+└── docs/
+```
+
+---
+
+## 6. Decisiones Clave por Tomar
+
+| Decisión | Opciones | Impacto |
+|----------|----------|---------|
+| Base de datos | SQLite / PostgreSQL | Concurrencia, despliegue |
+| Autenticación | Sesiones / JWT / Ninguna | Seguridad, complejidad |
+| Frontend | Templates / SPA / Ninguno | Experiencia usuario |
+| Despliegue | Local / Docker / Cloud | Escalabilidad |
+
+---
+
+## 7. Ejemplo de Implementación Mínima (Pseudocódigo)
+
+```python
+# modelos.py
+class Device:
+    id: int (PK)
+    serial_number: str (unique)
+    status: str (available/loaned)
+    loans: List[Loan] (one-to-many)
+
+class User:
+    id: int (PK)
+    identification: str (unique)
+    loans: List[Loan] (one-to-many)
+
+class Loan:
+    id: int (PK)
+    device_id: int (FK)
+    user_id: int (FK)
+    loan_date: datetime
+    return_date: datetime (nullable)
+    status: str (active/returned)
+
+# servicios/loan_service.py
+def loan_device(device_id: int, user_id: int) -> Loan:
+    with transaction():  # Atomicidad
+        device = get_device_for_update(device_id)
+        if device.status != 'available':
+            raise DeviceNotAvailableError()
+        
+        loan = Loan.create(
+            device_id=device_id,
+            user_id=user_id,
+            loan_date=now(),
+            status='active'
+        )
+        device.status = 'loaned'
+        return loan
+```
+
+---
+
+## 8. Consideraciones Adicionales
+
+- **Validaciones**: Únicas (serial_number, identification) a nivel de base de datos
+- **Auditoría**: Campos `created_at`, `updated_at` en todas las entidades
+- **Backups**: Script para exportar base de datos periódicamente
+- **Logging**: Registrar préstamos/devoluciones para auditoría
+- **Versionado API**: `/api/v1/...` para compatibilidad futura
+- **Pruebas**: Cubrir flujos críticos (préstamo con dispositivo no disponible, devolución de préstamo inexistente)

From d3d1fb1b32cab82f8be2e99c61be5c78365526dd Mon Sep 17 00:00:00 2001
From: ijuanes <ijuanes@hackercachy>
Date: Tue, 9 Jun 2026 23:54:38 +0100
Subject: [PATCH 5/5] 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
---
 README.md                               |  10 ++-
 REQUIREMENTS.md                         |  11 +++
 app.py                                  | 109 ++++++++++++++++++++++++
 gestiontablets.sh                       |   1 +
 minimal_app.py                          |  98 ++++++++++++++++++++-
 simple_app.py                           |  16 ++++
 templates/add_non_loanable_device.html  |  63 ++++++++++++++
 templates/base.html                     |   1 +
 templates/edit_non_loanable_device.html |  71 +++++++++++++++
 templates/non_loanable_devices.html     |  43 ++++++++++
 10 files changed, 417 insertions(+), 6 deletions(-)
 create mode 100644 gestiontablets.sh
 create mode 100644 templates/add_non_loanable_device.html
 create mode 100644 templates/edit_non_loanable_device.html
 create mode 100644 templates/non_loanable_devices.html

diff --git a/README.md b/README.md
index b880960..4a75b92 100644
--- a/README.md
+++ b/README.md
@@ -10,15 +10,16 @@ A simple SQLite-based system for managing tablet lending and returns.
 - **Return Management**: Record when tablets are returned
 - **History Tracking**: Complete history of all loans and returns
 - **User Loans View**: See all tablets loaned to each user (demonstrates one-to-many relationship)
+- **Non-Loanable Devices**: Track inventory devices that cannot be loaned (e.g., projectors, monitors)
 - **Project Notes**: Markdown editor for development documentation
 
 ## Files
 
-- `minimal_app.py` - Interactive command-line application
+- `minimal_app.py` - Interactive command-line application (includes non-loanable device management)
 - `test_app.py` - Test script that demonstrates functionality
-- `tablets.db` - SQLite database (created automatically)
-- `simple_app.py` - Web-based version (requires Flask)
-- `app.py` - Alternative web version (requires Flask)
+- `tablets.db` - SQLite database (created automatically, includes non_loanable_devices table)
+- `simple_app.py` - Web-based version (requires Flask, includes non-loanable device management)
+- `app.py` - Alternative web version (requires Flask, includes non-loanable device management)
 
 ## Quick Start
 
@@ -144,6 +145,7 @@ python3 app.py
 - **Loan Tablet**: Loan a tablet to a user (with search for large datasets)
 - **User Loans**: View all tablets loaned to each user - demonstrates the **one-to-many relationship** (one user, multiple tablets)
 - **Loan History**: Complete history of all loan and return transactions
+- **Non-Loanable Devices**: Manage inventory of devices that cannot be loaned (add, edit, delete, view)
 - **Project Management**: Markdown editor for development notes (saved to `notes_development/project_notes.md`)
 
 ## Database Backup
diff --git a/REQUIREMENTS.md b/REQUIREMENTS.md
index ad421ad..f0c6929 100644
--- a/REQUIREMENTS.md
+++ b/REQUIREMENTS.md
@@ -5,6 +5,17 @@
 El sistema debe permitir la gestión del préstamo y devolución de dispositivos tablets entre un inventario y un conjunto de usuarios. El enfoque principal es el seguimiento del estado de cada dispositivo y su relación con los usuarios que los han tomado prestados.
 
 ---
+## Requisitos Faltantes
+
+### Gestión de dispositivos no prestables
+
+✅ **IMPLEMENTADO** - El sistema ahora permite:
+- Registrar nuevos dispositivos no prestables en un inventario separado (tabla `non_loanable_devices`)
+- Gestionar dispositivos no prestables a través de:
+  - Interfaz web (app.py): /non_loanable_devices, /add_non_loanable_device, /edit_non_loanable_device, /delete_non_loanable_device
+  - Interfaz CLI (minimal_app.py): Opciones 8, 9, 10 del menú
+- La implementación utiliza una tabla separada en la misma base de datos con los siguientes campos:
+  - brand, model, serial_number (único), device_type, location, status, notes, purchase_date, purchase_cost
 
 ## Requisitos Funcionales
 
diff --git a/app.py b/app.py
index a5332b7..7dfba4d 100644
--- a/app.py
+++ b/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()
diff --git a/gestiontablets.sh b/gestiontablets.sh
new file mode 100644
index 0000000..1d4b29d
--- /dev/null
+++ b/gestiontablets.sh
@@ -0,0 +1 @@
+vibe --resume fa1bb230
diff --git a/minimal_app.py b/minimal_app.py
index ff0295a..381a26d 100644
--- a/minimal_app.py
+++ b/minimal_app.py
@@ -44,6 +44,22 @@ def init_db():
         )
     ''')
     
+    # Create non_loanable_devices table
+    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()
     conn.close()
 
@@ -202,6 +218,59 @@ def show_loan_history():
     
     conn.close()
 
+
+def add_non_loanable_device(brand, model, serial_number, device_type, location='', notes='', purchase_date='', purchase_cost=None):
+    """Add a new non-loanable device to inventory"""
+    conn = sqlite3.connect('tablets.db')
+    cursor = conn.cursor()
+    
+    try:
+        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()
+        print(f"✓ Added non-loanable device: {brand} {model} ({serial_number}) - Type: {device_type}")
+    except sqlite3.IntegrityError:
+        print(f"✗ Error: Serial number {serial_number} already exists")
+    finally:
+        conn.close()
+
+
+def show_non_loanable_devices():
+    """Show all non-loanable devices"""
+    conn = sqlite3.connect('tablets.db')
+    cursor = conn.cursor()
+    
+    cursor.execute("SELECT id, brand, model, serial_number, device_type, location, status FROM non_loanable_devices")
+    devices = cursor.fetchall()
+    
+    print("\n=== Non-Loanable Devices ===")
+    if devices:
+        for device in devices:
+            print(f"ID: {device[0]}, Type: {device[4]}, {device[1]} {device[2]} ({device[3]}), Location: {device[5] or 'N/A'}, Status: {device[6]}")
+    else:
+        print("No non-loanable devices")
+    
+    conn.close()
+
+
+def delete_non_loanable_device(device_id):
+    """Delete a non-loanable device"""
+    conn = sqlite3.connect('tablets.db')
+    cursor = conn.cursor()
+    
+    cursor.execute("DELETE FROM non_loanable_devices WHERE id = ?", (device_id,))
+    conn.commit()
+    
+    if cursor.rowcount > 0:
+        print(f"✓ Non-loanable device {device_id} deleted")
+    else:
+        print(f"✗ Error: Device {device_id} not found")
+    
+    conn.close()
+
 def main():
     """Main menu"""
     init_db()
@@ -218,9 +287,12 @@ def main():
         print("5. Show Available Tablets")
         print("6. Show Active Loans")
         print("7. Show Loan History")
-        print("8. Exit")
+        print("8. Add Non-Loanable Device")
+        print("9. Show Non-Loanable Devices")
+        print("10. Delete Non-Loanable Device")
+        print("11. Exit")
         
-        choice = input("Enter your choice (1-8): ")
+        choice = input("Enter your choice (1-11): ")
         
         if choice == '1':
             print("\n=== Add Tablet ===")
@@ -269,6 +341,28 @@ def main():
             show_loan_history()
         
         elif choice == '8':
+            print("\n=== Add Non-Loanable Device ===")
+            brand = input("Brand: ")
+            model = input("Model: ")
+            serial_number = input("Serial Number: ")
+            device_type = input("Device Type (e.g., projector, monitor): ")
+            location = input("Location (optional): ")
+            notes = input("Notes (optional): ")
+            add_non_loanable_device(brand, model, serial_number, device_type, location, notes)
+        
+        elif choice == '9':
+            show_non_loanable_devices()
+        
+        elif choice == '10':
+            print("\n=== Delete Non-Loanable Device ===")
+            show_non_loanable_devices()
+            device_id = input("Enter Device ID to delete: ")
+            try:
+                delete_non_loanable_device(int(device_id))
+            except ValueError:
+                print("✗ Error: Invalid ID format")
+        
+        elif choice == '11':
             print("Goodbye!")
             break
         
diff --git a/simple_app.py b/simple_app.py
index f50478d..0674035 100644
--- a/simple_app.py
+++ b/simple_app.py
@@ -62,6 +62,22 @@ def init_db():
             )
         ''')
         
+        # Create non_loanable_devices table
+        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()
 
 class SimpleHTTPRequestHandler(BaseHTTPRequestHandler):
diff --git a/templates/add_non_loanable_device.html b/templates/add_non_loanable_device.html
new file mode 100644
index 0000000..ae0489e
--- /dev/null
+++ b/templates/add_non_loanable_device.html
@@ -0,0 +1,63 @@
+{% extends "base.html" %}
+
+{% block content %}
+    <h2>Add Non-Loanable Device</h2>
+    <p>Add a device that will be tracked in inventory but cannot be loaned to users (e.g., projectors, monitors, etc.)</p>
+    
+    <form method="POST" action="/add_non_loanable_device">
+        <div class="form-group">
+            <label for="device_type">Device Type:</label>
+            <select id="device_type" name="device_type" required>
+                <option value="">Select device type...</option>
+                <option value="projector">Projector</option>
+                <option value="monitor">Monitor</option>
+                <option value="laptop">Laptop (non-loanable)</option>
+                <option value="printer">Printer</option>
+                <option value="camera">Camera</option>
+                <option value="audio">Audio Equipment</option>
+                <option value="network">Network Equipment</option>
+                <option value="other">Other</option>
+            </select>
+        </div>
+
+        <div class="form-group">
+            <label for="brand">Brand:</label>
+            <input type="text" id="brand" name="brand" required>
+        </div>
+
+        <div class="form-group">
+            <label for="model">Model:</label>
+            <input type="text" id="model" name="model" required>
+        </div>
+
+        <div class="form-group">
+            <label for="serial_number">Serial Number:</label>
+            <input type="text" id="serial_number" name="serial_number" required>
+        </div>
+
+        <div class="form-group">
+            <label for="location">Location:</label>
+            <input type="text" id="location" name="location">
+        </div>
+
+        <div class="form-group">
+            <label for="purchase_date">Purchase Date:</label>
+            <input type="date" id="purchase_date" name="purchase_date">
+        </div>
+
+        <div class="form-group">
+            <label for="purchase_cost">Purchase Cost:</label>
+            <input type="number" id="purchase_cost" name="purchase_cost" step="0.01">
+        </div>
+
+        <div class="form-group">
+            <label for="notes">Notes:</label>
+            <textarea id="notes" name="notes"></textarea>
+        </div>
+
+        <div class="form-group">
+            <button type="submit" class="btn">Add Device</button>
+            <a href="/non_loanable_devices" class="btn">Cancel</a>
+        </div>
+    </form>
+{% endblock %}
diff --git a/templates/base.html b/templates/base.html
index 629882b..e93f5f7 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -144,6 +144,7 @@
             <a href="/loan_tablet">Loan Tablet</a>
             <a href="/history">Loan History</a>
             <a href="/user_loans">User Loans</a>
+            <a href="/non_loanable_devices">Non-Loanable Devices</a>
             <a href="/project_management">Project Management</a>
         </div>
         
diff --git a/templates/edit_non_loanable_device.html b/templates/edit_non_loanable_device.html
new file mode 100644
index 0000000..80c90b4
--- /dev/null
+++ b/templates/edit_non_loanable_device.html
@@ -0,0 +1,71 @@
+{% extends "base.html" %}
+
+{% block content %}
+    <h2>Edit Non-Loanable Device</h2>
+    
+    <form method="POST" action="/edit_non_loanable_device/{{ device.id }}">
+        <div class="form-group">
+            <label for="device_type">Device Type:</label>
+            <select id="device_type" name="device_type" required>
+                <option value="projector" {% if device.device_type == 'projector' %}selected{% endif %}>Projector</option>
+                <option value="monitor" {% if device.device_type == 'monitor' %}selected{% endif %}>Monitor</option>
+                <option value="laptop" {% if device.device_type == 'laptop' %}selected{% endif %}>Laptop (non-loanable)</option>
+                <option value="printer" {% if device.device_type == 'printer' %}selected{% endif %}>Printer</option>
+                <option value="camera" {% if device.device_type == 'camera' %}selected{% endif %}>Camera</option>
+                <option value="audio" {% if device.device_type == 'audio' %}selected{% endif %}>Audio Equipment</option>
+                <option value="network" {% if device.device_type == 'network' %}selected{% endif %}>Network Equipment</option>
+                <option value="other" {% if device.device_type == 'other' %}selected{% endif %}>Other</option>
+            </select>
+        </div>
+
+        <div class="form-group">
+            <label for="brand">Brand:</label>
+            <input type="text" id="brand" name="brand" value="{{ device.brand }}" required>
+        </div>
+
+        <div class="form-group">
+            <label for="model">Model:</label>
+            <input type="text" id="model" name="model" value="{{ device.model }}" required>
+        </div>
+
+        <div class="form-group">
+            <label for="serial_number">Serial Number:</label>
+            <input type="text" id="serial_number" name="serial_number" value="{{ device.serial_number }}" required>
+        </div>
+
+        <div class="form-group">
+            <label for="location">Location:</label>
+            <input type="text" id="location" name="location" value="{{ device.location or '' }}">
+        </div>
+
+        <div class="form-group">
+            <label for="status">Status:</label>
+            <select id="status" name="status" required>
+                <option value="available" {% if device.status == 'available' %}selected{% endif %}>Available</option>
+                <option value="in_use" {% if device.status == 'in_use' %}selected{% endif %}>In Use</option>
+                <option value="maintenance" {% if device.status == 'maintenance' %}selected{% endif %}>Maintenance</option>
+                <option value="retired" {% if device.status == 'retired' %}selected{% endif %}>Retired</option>
+            </select>
+        </div>
+
+        <div class="form-group">
+            <label for="purchase_date">Purchase Date:</label>
+            <input type="date" id="purchase_date" name="purchase_date" value="{{ device.purchase_date or '' }}">
+        </div>
+
+        <div class="form-group">
+            <label for="purchase_cost">Purchase Cost:</label>
+            <input type="number" id="purchase_cost" name="purchase_cost" step="0.01" value="{{ device.purchase_cost or '' }}">
+        </div>
+
+        <div class="form-group">
+            <label for="notes">Notes:</label>
+            <textarea id="notes" name="notes">{{ device.notes or '' }}</textarea>
+        </div>
+
+        <div class="form-group">
+            <button type="submit" class="btn">Update Device</button>
+            <a href="/non_loanable_devices" class="btn">Cancel</a>
+        </div>
+    </form>
+{% endblock %}
diff --git a/templates/non_loanable_devices.html b/templates/non_loanable_devices.html
new file mode 100644
index 0000000..a27e6ac
--- /dev/null
+++ b/templates/non_loanable_devices.html
@@ -0,0 +1,43 @@
+{% extends "base.html" %}
+
+{% block content %}
+    <div class="section">
+        <h2>Non-Loanable Devices Inventory</h2>
+        <p>These devices are tracked in inventory but cannot be loaned to users.</p>
+        <a href="/add_non_loanable_device" class="btn">Add Non-Loanable Device</a>
+        
+        {% if devices %}
+            <table>
+                <thead>
+                    <tr>
+                        <th>Type</th>
+                        <th>Brand</th>
+                        <th>Model</th>
+                        <th>Serial Number</th>
+                        <th>Location</th>
+                        <th>Status</th>
+                        <th>Actions</th>
+                    </tr>
+                </thead>
+                <tbody>
+                    {% for device in devices %}
+                        <tr>
+                            <td>{{ device.device_type }}</td>
+                            <td>{{ device.brand }}</td>
+                            <td>{{ device.model }}</td>
+                            <td>{{ device.serial_number }}</td>
+                            <td>{{ device.location or '-' }}</td>
+                            <td>{{ device.status }}</td>
+                            <td>
+                                <a href="/edit_non_loanable_device/{{ device.id }}" class="btn">Edit</a>
+                                <a href="/delete_non_loanable_device/{{ device.id }}" class="btn btn-danger" onclick="return confirm('Are you sure you want to delete this device?')">Delete</a>
+                            </td>
+                        </tr>
+                    {% endfor %}
+                </tbody>
+            </table>
+        {% else %}
+            <p>No non-loanable devices registered.</p>
+        {% endif %}
+    </div>
+{% endblock %}