Implement user profile editing for logged-in users

[aolguin89]

User Story

As a logged-in user
I want to update my profile information
So that I can keep my account details current

Description

Create profile page where users can update their own information (except username and role).

Prerequisites

• User model and DAO already exist
• Login system implemented

Tasks

Servlet

• Create ProfileServlet.java in controller/ package
• Handle GET: display current user's profile form
• Handle POST: process profile update
• Validate input fields
• Prevent modification of: username, role, created_at
• Allow modification of: email, first name, last name, DNI, address, phone, birth date, gender
• Check email uniqueness (excluding current user)
• Update database using UserDAO.update()
• Show success/error message
• Configure servlet mapping (/profile)

View

• Create profile.jsp in /WEB-INF/views/
• Use layout includes
• Profile form with current values pre-filled
• Display username and role (read-only/disabled)
• Editable fields: email, first name, last name, DNI, address, phone, birth date, gender
• Optional: Change password section (separate form)
• Success/error messages
• Cancel button (back to dashboard)

Navbar Update

• Add "Profile" link in user dropdown menu
• Show for all authenticated users

Acceptance Criteria

• User sees their current profile data
• Can update editable fields
• Cannot change username or role
• Email uniqueness validated (excluding self)
• Success message after update
• Error message if validation fails
• Changes persist in database
• Session user data updated after edit (optional)