feat: Add Remember Me to admin login

- Added Remember Me checkbox to login form with 30-day session expiry
- Sessions default to 1 day; when remember_me=true, expire in 30 days
- User info stored in localStorage (persistent) vs sessionStorage (per-tab)
- initAuth() checks localStorage first, then sessionStorage for user info

admin_server.py

@@ -834,9 +834,11 @@ def login(body: dict):
         raise HTTPException(status_code=401, detail="Invalid username or password")
 
     token = _generate_token()
+    remember_me = body.get("remember_me", False)
+    expiry = "+30 days" if remember_me else "+1 day"
     conn.execute(
-        "INSERT INTO sessions (user_id, token, expires_at) VALUES (?, ?, datetime('now', '+1 day'))",
-        (row["id"], token),
+        "INSERT INTO sessions (user_id, token, expires_at) VALUES (?, ?, datetime('now', ?))",
+        (row["id"], token, expiry),
     )
     conn.commit()
     _log_activity(conn, "login", "user", row["id"],

static/index.html

@@ -937,6 +937,9 @@
     <div id="loginError" class="login-error"></div>
     <input id="loginUser" class="input-field" type="text" placeholder="Username" autocomplete="username">
     <input id="loginPass" class="input-field" type="password" placeholder="Password" autocomplete="current-password">
+    <label style="display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text2,#999);margin-top:4px;cursor:pointer;">
+      <input type="checkbox" id="loginRemember" checked> Remember me (30 days)
+    </label>
     <button id="loginBtn" class="btn btn-primary btn-block" onclick="doLogin()">Sign In</button>
   </div>
 </div>
@@ -1822,6 +1825,7 @@ async function doLogin() {
   const username = document.getElementById('loginUser').value.trim();
   const password = document.getElementById('loginPass').value;
   const loginBtn = document.getElementById('loginBtn');
+  const rememberMe = document.getElementById('loginRemember').checked;
   if (!username || !password) {
     showLoginError('Please enter username and password');
     return;
@@ -1832,12 +1836,19 @@ async function doLogin() {
     const data = await api('/api/auth/login', {
       method: 'POST',
       headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ username, password }),
+      body: JSON.stringify({ username, password, remember_me: rememberMe }),
     });
     AppState.currentUser = { id: data.id, username: data.username, role: data.role };
     AppState.authToken = data.token;
     localStorage.setItem('adminToken', data.token);
-    sessionStorage.setItem('adminUser', JSON.stringify(AppState.currentUser));
+    const userInfo = JSON.stringify(AppState.currentUser);
+    if (rememberMe) {
+      localStorage.setItem('adminUser', userInfo);
+      sessionStorage.removeItem('adminUser');
+    } else {
+      sessionStorage.setItem('adminUser', userInfo);
+      localStorage.removeItem('adminUser');
+    }
     document.getElementById('loginOverlay').classList.add('hidden');
     updateUserUI();
     switchPage('dashboard');
@@ -1875,9 +1886,8 @@ async function initAuth() {
     try {
       // Verify token by fetching a protected endpoint that returns user info
       const users = await api('/api/users?limit=1');
-      // If we got here, token is valid — but we need user info.
-      // The login response stored user data, try sessionStorage fallback.
-      const savedUser = sessionStorage.getItem('adminUser');
+      // If we got here, token is valid — try localStorage first, then sessionStorage
+      const savedUser = localStorage.getItem('adminUser') || sessionStorage.getItem('adminUser');
       if (savedUser) {
         AppState.currentUser = JSON.parse(savedUser);
         document.getElementById('loginOverlay').classList.add('hidden');