Merge pull request 'Added username to accounts' (#6) from feature/add-username into main

Reviewed-on: #6

add_profile.php

@@ -0,0 +1,41 @@
+<?php
+require 'db.php';
+require 'auth.php';
+
+header('Content-Type: application/json');
+require_login();
+
+$user_id = current_user_id();
+
+$data = json_decode(file_get_contents('php://input'), true);
+$name = trim($data['name'] ?? '');
+
+if ($name === '') {
+    http_response_code(400);
+    echo json_encode(['success' => false, 'error' => 'Profile name is required']);
+    exit;
+}
+
+// Prevent duplicate profile names per user
+$stmt = $pdo->prepare("SELECT id FROM profiles WHERE user_id = ? AND name = ?");
+$stmt->execute([$user_id, $name]);
+
+if ($stmt->fetchColumn()) {
+    http_response_code(409);
+    echo json_encode(['success' => false, 'error' => 'Profile already exists']);
+    exit;
+}
+
+// Insert new profile
+$stmt = $pdo->prepare("INSERT INTO profiles (user_id, name, is_default) VALUES (?, ?, 0)");
+$stmt->execute([$user_id, $name]);
+
+$newProfileId = $pdo->lastInsertId();
+
+// Make it active immediately
+$_SESSION['active_profile_id'] = (int)$newProfileId;
+
+echo json_encode([
+    'success' => true,
+    'profile_id' => $newProfileId
+]);

add_project.php

@@ -6,6 +6,13 @@ header('Content-Type: application/json');
 require_login();
 
 $user_id = current_user_id();
+$profile_id = $_SESSION['active_profile_id'] ?? null;
+
+if (!$profile_id) {
+    http_response_code(400);
+    echo json_encode(['success' => false, 'error' => 'No active profile']);
+    exit;
+}
 
 $data = json_decode(file_get_contents('php://input'), true);
 $name = trim($data['name'] ?? '');
@@ -16,7 +23,7 @@ if ($name === '') {
     exit;
 }
 
-$stmt = $pdo->prepare("INSERT INTO projects (user_id, name) VALUES (?, ?)");
-$stmt->execute([$user_id, $name]);
+$stmt = $pdo->prepare("INSERT INTO projects (user_id, profile_id, name) VALUES (?, ?, ?)");
+$stmt->execute([$user_id, $profile_id, $name]);
 
 echo json_encode(['success' => true, 'id' => $pdo->lastInsertId()]);

get_data.php

@@ -6,9 +6,16 @@ header('Content-Type: application/json');
 require_login();
 
 $user_id = current_user_id();
+$profile_id = $_SESSION['active_profile_id'] ?? null;
 
-$stmt = $pdo->prepare("SELECT * FROM projects WHERE user_id = ? ORDER BY sort_order ASC");
-$stmt->execute([$user_id]);
+if (!$profile_id) {
+    http_response_code(400);
+    echo json_encode(['success' => false, 'error' => 'No active profile']);
+    exit;
+}
+
+$stmt = $pdo->prepare("SELECT * FROM projects WHERE user_id = ? AND profile_id = ? ORDER BY sort_order ASC");
+$stmt->execute([$user_id, $profile_id]);
 $projects = $stmt->fetchAll();
 
 foreach ($projects as &$project) {

get_profiles.php

@@ -0,0 +1,18 @@
+<?php
+require 'db.php';
+require 'auth.php';
+
+header('Content-Type: application/json');
+require_login();
+
+$user_id = current_user_id();
+
+$stmt = $pdo->prepare("SELECT id, name, is_default FROM profiles WHERE user_id = ? ORDER BY is_default DESC, name ASC");
+$stmt->execute([$user_id]);
+$profiles = $stmt->fetchAll(PDO::FETCH_ASSOC);
+
+echo json_encode([
+  'success' => true,
+  'active_profile_id' => $_SESSION['active_profile_id'] ?? null,
+  'profiles' => $profiles
+]);

index.php

@@ -144,8 +144,19 @@
     justify-content: center;
   }
 
+  .profile-select {
+    height: 32px;                 /* match your header-action-btn buttons */
+    font-size: 1.5rem;
+    font-weight: 700;   /* or 700 for stronger bold */
+    padding-right: 2.5rem;        /* key: reserve space for the arrow */
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+  }
+
   .add-project-btn {
-    font-size: 1.4rem;
+    font-size: 1.5rem;
+    font-weight: 600;   /* or 700 for stronger bold */
     padding: 0.5rem 1rem;
   }
 
@@ -259,37 +270,36 @@
     </button>
   </span>
 
-<div class="d-flex align-items-center gap-3">
-
-  <!-- Add Project -->
-  <button class="btn btn-success btn-lg header-action-btn"
-          data-bs-toggle="modal"
-          data-bs-target="#addProjectModal">
-    <i class="bi bi-plus-lg"></i>
-  </button>
-
-  <!-- User Dropdown -->
-  <div class="dropdown">
-    <button class="btn btn-outline-secondary btn-lg header-action-btn"
-            type="button"
-            id="menuButton"
-            data-bs-toggle="dropdown">
-      <i class="bi bi-person-circle"></i>
+  <div class="d-flex align-items-center gap-3">
+    <select id="profileSelect" class="form-select btn-lg profile-select" style="width: 140px;"></select>
+    <!-- Add Project -->
+    <button class="btn btn-success btn-lg header-action-btn"
+            data-bs-toggle="modal"
+            data-bs-target="#addProjectModal">
+      <i class="bi bi-plus-lg"></i>
     </button>
 
-    <ul class="dropdown-menu dropdown-menu-end custom-dropdown" aria-labelledby="menuButton">
-      <li class="dropdown-item-text fw-semibold fs-5" id="dropdownUserEmail"></li>
-      <li><hr class="dropdown-divider"></li>
-      <li>
-        <button class="dropdown-item fs-5" type="button" id="logoutBtn">
-          <i class="bi bi-box-arrow-right"></i>
-          <span>Logout</span>
-        </button>
-      </li>
-    </ul>
-  </div>
+    <!-- User Dropdown -->
+    <div class="dropdown">
+      <button class="btn btn-outline-secondary btn-lg header-action-btn"
+              type="button"
+              id="menuButton"
+              data-bs-toggle="dropdown">
+        <i class="bi bi-person-circle"></i>
+      </button>
 
-</div>
+      <ul class="dropdown-menu dropdown-menu-end custom-dropdown" aria-labelledby="menuButton">
+        <li class="dropdown-item-text fw-semibold fs-5" id="dropdownUserEmail"></li>
+        <li><hr class="dropdown-divider"></li>
+        <li>
+          <button class="dropdown-item fs-5" type="button" id="logoutBtn">
+            <i class="bi bi-box-arrow-right"></i>
+            <span>Logout</span>
+          </button>
+        </li>
+      </ul>
+    </div>
+  </div>
 </h1>
 
 
@@ -430,8 +440,8 @@
         </div>
         <div class="modal-body">
           <div class="mb-3">
-            <label class="form-label">Email</label>
-            <input type="email" class="form-control" id="loginEmail" required>
+            <label class="form-label">Email or Username</label>
+            <input type="text" class="form-control" id="loginEmail" required>
           </div>
           <div class="mb-3">
             <label class="form-label">Password</label>
@@ -460,6 +470,10 @@
             <label class="form-label">Email</label>
             <input type="email" class="form-control" id="registerEmail" required>
           </div>
+          <div class="mb-3">
+            <label class="form-label">Username (optional)</label>
+            <input type="text" class="form-control" id="registerUsername">
+          </div>
           <div class="mb-3">
             <label class="form-label">Password (8+ chars)</label>
             <input type="password" class="form-control" id="registerPassword" required minlength="8">
@@ -538,131 +552,149 @@
 			  favicon.type = "image/svg+xml";
 			});
 		});
-}
+  }
 
+  function loadProfiles() {
+    fetch('get_profiles.php')
+      .then(r => r.json())
+      .then(data => {
+        if (!data.success) return;
 
+        const sel = document.getElementById('profileSelect');
+        sel.innerHTML = '';
 
+        data.profiles.forEach(p => {
+          const opt = document.createElement('option');
+          opt.value = p.id;
+          opt.textContent = p.name;
+          sel.appendChild(opt);
+        });
 
+        if (data.active_profile_id) {
+          sel.value = String(data.active_profile_id);
+        }
+      });
+  }
   
-    function fetchProjects() {
-      fetch('get_data.php')
-        .then(res => res.json())
-        .then(data => {
+  function fetchProjects() {
+    fetch('get_data.php')
+      .then(res => res.json())
+      .then(data => {
 
-          if (!Array.isArray(data)) {
-            if (data && data.error === 'Not authenticated') {
-              new bootstrap.Modal(document.getElementById('loginModal')).show();
-              return;
-            }
-            console.error('get_data.php returned non-array:', data);
+        if (!Array.isArray(data)) {
+          if (data && data.error === 'Not authenticated') {
+            new bootstrap.Modal(document.getElementById('loginModal')).show();
             return;
           }
+          console.error('get_data.php returned non-array:', data);
+          return;
+        }
 
-          const container = document.getElementById('projectGrid');
-          container.innerHTML = '';
+        const container = document.getElementById('projectGrid');
+        container.innerHTML = '';
 
-          data.forEach((project, idx) => {
+        data.forEach((project, idx) => {
       
-          const projectId = `project-${project.id}`;
-          const colorClass = `project-color-${idx % 10}`;
+        const projectId = `project-${project.id}`;
+        const colorClass = `project-color-${idx % 10}`;
       
-          const col = document.createElement('div');
+        const col = document.createElement('div');
           
-			col.className = `col-12 col-sm-6 col-md-4 col-lg-2 col-xl-2 col-xxl-1 g-2 m-0 project-column`;
-			col.dataset.projectId = project.id;
-			col.classList.add("draggable-project");
-			col.innerHTML = `
-			  <div class="project-card ${colorClass}">
-				<div class="project-header">
-				  <span class="project-title">${project.name}</span>
-				  <div class="d-flex align-items-center">
-					<button class="btn-icon add-task-btn" data-project-id="${project.id}" title="Add Task">
-					  <i class="bi bi-plus"></i>
-					</button>
-					<button class="btn-icon text-danger delete-project-btn" data-project-id="${project.id}" title="Delete Project">
-					  <i class="bi bi-dash"></i>
-					</button>
-				  </div>
-				</div>
-				<div class="project-body">
-				  ${project.tasks.map(task => `
-					<div class="d-flex justify-content-between align-items-center small-text mb-1 task-text">
-					  <span class="${task.highlighted == 1 ? 'highlighted' : ''} ${task.highlighted == 2 ? 'completed' : ''}".trim()
-      data-task-id="${task.id}">${task.name}</span>
-					  <div class="d-flex">
-						<button class="btn-icon add-subtask-btn" data-task-id="${task.id}" title="Add Subtask">
-						  <i class="bi bi-plus"></i>
-						</button>
-						<button class="btn-icon text-danger delete-task-btn" data-task-id="${task.id}" title="Delete Task">
-						  <i class="bi bi-dash"></i>
-						</button>
-					  </div>
-					</div>
-					<div class="ms-3">
-					  ${task.subtasks.map(sub => `
-						<div class="d-flex justify-content-between align-items-center small-text mb-1">
-						  <span class="${sub.highlighted == 1 ? 'highlighted' : ''} ${sub.highlighted == 2 ? 'completed' : ''}".trim()
-      data-subtask-id="${sub.id}">${sub.name}</span>
-						  <button class="btn-icon text-danger delete-subtask-btn" data-subtask-id="${sub.id}" title="Delete Subtask">
-							<i class="bi bi-dash"></i>
-						  </button>
-						</div>
-					  `).join('')}
-					</div>
-				  `).join('')}
-				</div>
-			  </div>
-			`;
+        col.className = `col-12 col-sm-6 col-md-4 col-lg-2 col-xl-2 col-xxl-1 g-2 m-0 project-column`;
+        col.dataset.projectId = project.id;
+        col.classList.add("draggable-project");
+        col.innerHTML = `
+          <div class="project-card ${colorClass}">
+          <div class="project-header">
+            <span class="project-title">${project.name}</span>
+            <div class="d-flex align-items-center">
+            <button class="btn-icon add-task-btn" data-project-id="${project.id}" title="Add Task">
+              <i class="bi bi-plus"></i>
+            </button>
+            <button class="btn-icon text-danger delete-project-btn" data-project-id="${project.id}" title="Delete Project">
+              <i class="bi bi-dash"></i>
+            </button>
+            </div>
+          </div>
+          <div class="project-body">
+            ${project.tasks.map(task => `
+            <div class="d-flex justify-content-between align-items-center small-text mb-1 task-text">
+              <span class="${task.highlighted == 1 ? 'highlighted' : ''} ${task.highlighted == 2 ? 'completed' : ''}".trim()
+        data-task-id="${task.id}">${task.name}</span>
+              <div class="d-flex">
+              <button class="btn-icon add-subtask-btn" data-task-id="${task.id}" title="Add Subtask">
+                <i class="bi bi-plus"></i>
+              </button>
+              <button class="btn-icon text-danger delete-task-btn" data-task-id="${task.id}" title="Delete Task">
+                <i class="bi bi-dash"></i>
+              </button>
+              </div>
+            </div>
+            <div class="ms-3">
+              ${task.subtasks.map(sub => `
+              <div class="d-flex justify-content-between align-items-center small-text mb-1">
+                <span class="${sub.highlighted == 1 ? 'highlighted' : ''} ${sub.highlighted == 2 ? 'completed' : ''}".trim()
+        data-subtask-id="${sub.id}">${sub.name}</span>
+                <button class="btn-icon text-danger delete-subtask-btn" data-subtask-id="${sub.id}" title="Delete Subtask">
+                <i class="bi bi-dash"></i>
+                </button>
+              </div>
+              `).join('')}
+            </div>
+            `).join('')}
+          </div>
+          </div>
+        `;
 
-            container.appendChild(col);
-          });
+          container.appendChild(col);
+        });
 
 
-// Create the drop indicator element
-const placeholder = document.createElement('div');
-placeholder.className = 'project-column';
-placeholder.innerHTML = `<div class="project-placeholder"></div>`;
+    // Create the drop indicator element
+    const placeholder = document.createElement('div');
+    placeholder.className = 'project-column';
+    placeholder.innerHTML = `<div class="project-placeholder"></div>`;
 
 
-// Setup drag events for project reordering
-document.querySelectorAll('.project-column').forEach(col => {
-  col.setAttribute('draggable', 'true');
+    // Setup drag events for project reordering
+    document.querySelectorAll('.project-column').forEach(col => {
+      col.setAttribute('draggable', 'true');
 
-  col.addEventListener('dragstart', (e) => {
-    e.dataTransfer.setData('text/plain', col.dataset.projectId);
-    col.classList.add('dragging');
-  });
+      col.addEventListener('dragstart', (e) => {
+        e.dataTransfer.setData('text/plain', col.dataset.projectId);
+        col.classList.add('dragging');
+      });
 
-  col.addEventListener('dragend', () => {
-    col.classList.remove('dragging');
-    placeholder.remove();
-  });
+      col.addEventListener('dragend', () => {
+        col.classList.remove('dragging');
+        placeholder.remove();
+      });
 
-  col.addEventListener('dragover', (e) => {
-    e.preventDefault();
-    const dragging = document.querySelector('.dragging');
-    if (!dragging || dragging === col) return;
+      col.addEventListener('dragover', (e) => {
+        e.preventDefault();
+        const dragging = document.querySelector('.dragging');
+        if (!dragging || dragging === col) return;
 
-    const bounding = col.getBoundingClientRect();
-    const offset = e.clientY - bounding.top;
+        const bounding = col.getBoundingClientRect();
+        const offset = e.clientY - bounding.top;
 
-    if (offset < bounding.height / 2) {
-      col.parentNode.insertBefore(placeholder, col);
-    } else {
-      col.parentNode.insertBefore(placeholder, col.nextSibling);
-    }
-  });
+        if (offset < bounding.height / 2) {
+          col.parentNode.insertBefore(placeholder, col);
+        } else {
+          col.parentNode.insertBefore(placeholder, col.nextSibling);
+        }
+      });
 
-  col.addEventListener('drop', (e) => {
-    e.preventDefault();
-    const dragging = document.querySelector('.dragging');
-    if (placeholder && placeholder.parentNode) {
-      placeholder.parentNode.insertBefore(dragging, placeholder);
-      placeholder.remove();
-      updateProjectOrder(); // This already exists in your code
-    }
-  });
-});
+      col.addEventListener('drop', (e) => {
+        e.preventDefault();
+        const dragging = document.querySelector('.dragging');
+        if (placeholder && placeholder.parentNode) {
+          placeholder.parentNode.insertBefore(dragging, placeholder);
+          placeholder.remove();
+          updateProjectOrder(); // This already exists in your code
+        }
+      });
+    });
 
 
 		  // Enable drag-and-drop sorting
@@ -914,10 +946,22 @@ document.querySelectorAll('.project-column').forEach(col => {
     .then(data => {
       bootstrap.Modal.getInstance(document.getElementById('loginModal')).hide();
 
+      // Show/hide settings button according to permissions
       if (!data.user.can_manage_settings) {
         document.querySelectorAll('.settings-btn').forEach(b => b.style.display = 'none');
+      } else {
+        document.querySelectorAll('.settings-btn').forEach(b => b.style.display = '');
       }
 
+      // Update user email or username if exists in the dropdown and refresh profiles + projects
+      if (data.user) {
+        const userEl = document.getElementById('dropdownUserEmail');
+        if (userEl) userEl.textContent = (data.user.username && data.user.username.trim())
+          ? data.user.username
+          : data.user.email;
+      }
+
+      loadProfiles();
       fetchProjects();
     })
     .catch(ex => {
@@ -930,6 +974,7 @@ document.querySelectorAll('.project-column').forEach(col => {
   document.getElementById('registerForm').addEventListener('submit', (e) => {
     e.preventDefault();
     const email = document.getElementById('registerEmail').value.trim();
+    const username = document.getElementById('registerUsername').value.trim();
     const password = document.getElementById('registerPassword').value;
 
     const err = document.getElementById('registerError');
@@ -940,7 +985,7 @@ document.querySelectorAll('.project-column').forEach(col => {
     fetch('register.php', {
       method: 'POST',
       headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ email, password })
+      body: JSON.stringify({ email, username: username || null, password })
     })
     .then(async r => {
       const data = await r.json();
@@ -957,6 +1002,22 @@ document.querySelectorAll('.project-column').forEach(col => {
     });
   });
 
+  document.getElementById('profileSelect').addEventListener('change', () => {
+    const profileId = parseInt(document.getElementById('profileSelect').value, 10);
+
+    fetch('set_profile.php', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ profile_id: profileId })
+    })
+    .then(r => r.json())
+    .then(data => {
+      if (!data.success) return;
+      fetchProjects();
+    });
+  });  
+
+
   document.addEventListener('DOMContentLoaded', () => {
     loadSettings();
 
@@ -971,7 +1032,8 @@ document.querySelectorAll('.project-column').forEach(col => {
 
         // Add user name to user menu
         if (me.logged_in) {
-          document.getElementById('dropdownUserEmail').textContent = me.user.email;
+          document.getElementById('dropdownUserEmail').textContent =
+            (me.user.username && me.user.username.trim()) ? me.user.username : me.user.email;
         }
 
         // Hide settings button if user can't manage settings
@@ -979,6 +1041,7 @@ document.querySelectorAll('.project-column').forEach(col => {
           document.querySelectorAll('.settings-btn').forEach(b => b.style.display = 'none');
         }
 
+        loadProfiles();
         fetchProjects();
       });
   });
@@ -996,6 +1059,12 @@ document.querySelectorAll('.project-column').forEach(col => {
             // Clear UI
             document.getElementById('projectGrid').innerHTML = '';
 
+            // Clear Profile List
+            document.getElementById('profileSelect').innerHTML = '';
+
+            // Clear User Email
+            document.getElementById('dropdownUserEmail').textContent = '';
+
             // Show login modal
             new bootstrap.Modal(document.getElementById('loginModal')).show();
           })

login.php

@@ -5,19 +5,32 @@ require 'auth.php';
 header('Content-Type: application/json');
 
 $data = json_decode(file_get_contents('php://input'), true);
-$email = strtolower(trim($data['email'] ?? ''));
+
+// Keep front-end field name "email" for compatibility; it can now be email OR username
+$identifierRaw = trim($data['email'] ?? '');
+$identifier = strtolower($identifierRaw);
 $password = strval($data['password'] ?? '');
 
-$stmt = $pdo->prepare("
-    SELECT u.id, u.email, u.password_hash,
+if ($identifier === '') {
+    http_response_code(400);
+    echo json_encode(['success' => false, 'error' => 'Email or username is required']);
+    exit;
+}
+
+$isEmail = filter_var($identifier, FILTER_VALIDATE_EMAIL) !== false;
+
+$sql = "
+    SELECT u.id, u.email, u.username, u.password_hash,
            r.name AS role_name,
            r.can_manage_settings
     FROM users u
     JOIN roles r ON r.id = u.role_id
-    WHERE u.email = ?
+    WHERE " . ($isEmail ? "u.email = ?" : "u.username = ?") . "
     LIMIT 1
-");
-$stmt->execute([$email]);
+";
+
+$stmt = $pdo->prepare($sql);
+$stmt->execute([$identifier]);
 $user = $stmt->fetch(PDO::FETCH_ASSOC);
 
 if (!$user || !password_verify($password, $user['password_hash'])) {
@@ -27,18 +40,40 @@ if (!$user || !password_verify($password, $user['password_hash'])) {
 }
 
 $_SESSION['user'] = [
-    'id' => intval($user['id']),
+    'id' => (int)$user['id'],
     'email' => $user['email'],
+    'username' => $user['username'], // NEW
     'role' => $user['role_name'],
-    'can_manage_settings' => intval($user['can_manage_settings']),
+    'can_manage_settings' => (int)$user['can_manage_settings'],
 ];
 
+// Set active profile for this session (default profile if available)
+$stmt = $pdo->prepare("SELECT id FROM profiles WHERE user_id = ? AND is_default = 1 LIMIT 1");
+$stmt->execute([$_SESSION['user']['id']]);
+$profileId = $stmt->fetchColumn();
+
+if (!$profileId) {
+    $stmt = $pdo->prepare("SELECT id FROM profiles WHERE user_id = ? ORDER BY id ASC LIMIT 1");
+    $stmt->execute([$_SESSION['user']['id']]);
+    $profileId = $stmt->fetchColumn();
+}
+
+if (!$profileId) {
+    $stmt = $pdo->prepare("INSERT INTO profiles (user_id, name, is_default) VALUES (?, 'Default', 1)");
+    $stmt->execute([$_SESSION['user']['id']]);
+    $profileId = $pdo->lastInsertId();
+}
+
+$_SESSION['active_profile_id'] = (int)$profileId;
+
 echo json_encode([
     'success' => true,
     'user' => [
         'id' => $_SESSION['user']['id'],
         'email' => $_SESSION['user']['email'],
+        'username' => $_SESSION['user']['username'], // NEW
         'role' => $_SESSION['user']['role'],
         'can_manage_settings' => $_SESSION['user']['can_manage_settings'],
-    ]
+    ],
+    'active_profile_id' => $_SESSION['active_profile_id']
 ]);

register.php

@@ -6,6 +6,8 @@ header('Content-Type: application/json');
 
 $data = json_decode(file_get_contents('php://input'), true);
 $email = strtolower(trim($data['email'] ?? ''));
+$usernameRaw = trim($data['username'] ?? '');
+$username = $usernameRaw === '' ? null : strtolower($usernameRaw);
 $password = strval($data['password'] ?? '');
 
 if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
@@ -19,12 +21,31 @@ if (strlen($password) < 8) {
     exit;
 }
 
+// Optional username validation
+if ($username !== null) {
+    if (strlen($username) < 3 || strlen($username) > 50) {
+        http_response_code(400);
+        echo json_encode(['success' => false, 'error' => 'Username must be between 3 and 50 characters']);
+        exit;
+    }
+
+    // letters/numbers + . _ - ; must start/end with letter/number
+    if (!preg_match('/^[a-z0-9](?:[a-z0-9._-]*[a-z0-9])?$/', $username)) {
+        http_response_code(400);
+        echo json_encode([
+            'success' => false,
+            'error' => 'Username may contain letters, numbers, underscore, hyphen, dot, and must start/end with a letter or number'
+        ]);
+        exit;
+    }
+}
+
 $hash = password_hash($password, PASSWORD_DEFAULT);
 
 // Standard role id from roles table
 $stmt = $pdo->prepare("SELECT id FROM roles WHERE name = 'standard' LIMIT 1");
 $stmt->execute();
-$role_id = intval($stmt->fetchColumn());
+$role_id = (int)$stmt->fetchColumn();
 
 if ($role_id <= 0) {
     http_response_code(500);
@@ -33,10 +54,45 @@ if ($role_id <= 0) {
 }
 
 try {
-    $stmt = $pdo->prepare("INSERT INTO users (email, password_hash, role_id) VALUES (?, ?, ?)");
-    $stmt->execute([$email, $hash, $role_id]);
+    $pdo->beginTransaction();
+
+    // Friendly conflict checks (DB unique constraints should still exist)
+    $stmt = $pdo->prepare('SELECT 1 FROM users WHERE email = ? LIMIT 1');
+    $stmt->execute([$email]);
+    if ($stmt->fetchColumn()) {
+        $pdo->rollBack();
+        http_response_code(409);
+        echo json_encode(['success' => false, 'error' => 'Email already in use']);
+        exit;
+    }
+
+    if ($username !== null) {
+        $stmt = $pdo->prepare('SELECT 1 FROM users WHERE username = ? LIMIT 1');
+        $stmt->execute([$username]);
+        if ($stmt->fetchColumn()) {
+            $pdo->rollBack();
+            http_response_code(409);
+            echo json_encode(['success' => false, 'error' => 'Username already in use']);
+            exit;
+        }
+    }
+
+    // Create user (username is nullable)
+    $stmt = $pdo->prepare("INSERT INTO users (email, username, password_hash, role_id) VALUES (?, ?, ?, ?)");
+    $stmt->execute([$email, $username, $hash, $role_id]);
+    $userId = (int)$pdo->lastInsertId();
+
+    // Create default profile for this user
+    $stmt = $pdo->prepare("INSERT INTO profiles (user_id, name, is_default) VALUES (?, 'Default', 1)");
+    $stmt->execute([$userId]);
+
+    $pdo->commit();
+
     echo json_encode(['success' => true]);
+
 } catch (Throwable $e) {
+    if ($pdo->inTransaction()) $pdo->rollBack();
+
     http_response_code(409);
     echo json_encode(['success' => false, 'error' => 'Account already exists']);
 }

set_profile.php

@@ -0,0 +1,30 @@
+<?php
+require 'db.php';
+require 'auth.php';
+
+header('Content-Type: application/json');
+require_login();
+
+$user_id = current_user_id();
+
+$input = json_decode(file_get_contents('php://input'), true);
+$profile_id = (int)($input['profile_id'] ?? 0);
+
+if ($profile_id <= 0) {
+  http_response_code(400);
+  echo json_encode(['success' => false, 'error' => 'Invalid profile_id']);
+  exit;
+}
+
+$stmt = $pdo->prepare("SELECT id FROM profiles WHERE id = ? AND user_id = ?");
+$stmt->execute([$profile_id, $user_id]);
+
+if (!$stmt->fetchColumn()) {
+  http_response_code(403);
+  echo json_encode(['success' => false, 'error' => 'Profile not allowed']);
+  exit;
+}
+
+$_SESSION['active_profile_id'] = $profile_id;
+
+echo json_encode(['success' => true, 'active_profile_id' => $profile_id]);