add endpoint and UI for users to update their own username

main.py

@@ -226,6 +226,23 @@ async def change_own_password(request: Request):
     conn.close()
     return {"status": "ok"}
 
+@app.put("/api/users/me/username", dependencies=[Depends(is_authenticated)])
+async def change_own_username(request: Request):
+    data = await request.json()
+    new_username = data.get("username")
+    if not new_username:
+        raise HTTPException(status_code=400, detail="New username required")
+    user_id = request.session.get("user_id")
+    try:
+        conn = sqlite3.connect(DB_PATH)
+        c = conn.cursor()
+        c.execute('UPDATE users SET username = ? WHERE id = ?', (new_username, user_id))
+        conn.commit()
+        conn.close()
+    except sqlite3.IntegrityError:
+        raise HTTPException(status_code=400, detail="Username already exists")
+    return {"status": "ok"}
+
 class InstanceCreate(BaseModel):
     name: str
     ip: str

static/app.js

@@ -14,6 +14,7 @@ document.addEventListener('DOMContentLoaded', () => {
     const usersList = document.getElementById('users-list');
     const createUserForm = document.getElementById('create-user-form');
     const changePasswordForm = document.getElementById('change-password-form');
+    const changeUsernameForm = document.getElementById('change-username-form');
     const profileSuccess = document.getElementById('profile-success');
     const helpBtn = document.getElementById('help-btn');
     const helpModal = document.getElementById('help-modal');
@@ -265,6 +266,7 @@ document.addEventListener('DOMContentLoaded', () => {
         } else {
             navAdmin.style.display = 'none';
         }
+        document.getElementById('profile-username').value = currentUser.username;
     };
 
     logoutBtn.addEventListener('click', async () => {
@@ -277,6 +279,28 @@ document.addEventListener('DOMContentLoaded', () => {
         }
     });
 
+    changeUsernameForm.addEventListener('submit', async (e) => {
+        e.preventDefault();
+        const username = document.getElementById('profile-username').value;
+        try {
+            const res = await fetch('/api/users/me/username', {
+                method: 'PUT',
+                headers: { 'Content-Type': 'application/json' },
+                body: JSON.stringify({ username })
+            });
+            if (res.ok) {
+                currentUser.username = username;
+                profileSuccess.style.display = 'block';
+                setTimeout(() => profileSuccess.style.display = 'none', 3000);
+            } else {
+                const data = await res.json();
+                alert(data.detail || 'Failed to update username');
+            }
+        } catch (e) {
+            console.error('Error changing username', e);
+        }
+    });
+
     createUserForm.addEventListener('submit', async (e) => {
         e.preventDefault();
         const username = document.getElementById('new-username').value;

static/index.html

@@ -84,15 +84,26 @@
             <div id="profile-section" class="tab-content">
                 <div class="card profile-card">
                     <h2>My Profile</h2>
-                    <p class="helper-text">Change your account password below.</p>
-                    <form id="change-password-form">
+                    <p class="helper-text">Update your account details below.</p>
+                    
+                    <form id="change-username-form" class="profile-form">
                         <div class="form-group">
-                            <label for="profile-new-password">New Password</label>
+                            <label for="profile-username">Username</label>
+                            <input type="text" id="profile-username" placeholder="Enter new username" required>
+                        </div>
+                        <button type="submit" class="btn btn-primary">Update Username</button>
+                    </form>
+
+                    <div class="divider"></div>
+
+                    <form id="change-password-form" class="profile-form">
+                        <div class="form-group">
+                            <label for="profile-new-password">Password</label>
                             <input type="password" id="profile-new-password" placeholder="Enter new password" required>
                         </div>
                         <button type="submit" class="btn btn-primary">Update Password</button>
                     </form>
-                    <div id="profile-success" class="success-msg" style="display: none;">Password updated successfully!</div>
+                    <div id="profile-success" class="success-msg" style="display: none;">Profile updated successfully!</div>
                 </div>
             </div>
         </main>

static/style.css

@@ -197,8 +197,11 @@ input:focus {
 .btn-primary {
     background-color: var(--primary);
     color: white;
+}
+
+.login-card .btn-primary {
     width: 100%;
-    margin-top: 0.5rem;
+    margin-top: 1rem;
 }
 
 .btn-primary:hover {
@@ -440,6 +443,23 @@ input:focus {
     color: var(--text-muted);
 }
 
+.profile-form {
+    display: flex;
+    flex-direction: column;
+    gap: 1.25rem;
+    max-width: 400px;
+}
+
+.profile-form .btn-primary {
+    align-self: flex-start;
+}
+
+.divider {
+    height: 1px;
+    background-color: var(--border-color);
+    margin: 2rem 0;
+}
+
 .success-msg {
     color: var(--status-online);
     text-align: center;