Add login modal to landing page

- Show login modal when user is not authenticated
- Add handleLogin, showLoginModal, closeLoginModal functions
- Add login modal HTML with username/password form
- Add CSS styles for modal

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

public/claude-ide/projects-landing.css

@@ -417,3 +417,115 @@ body.sessions-page {
         padding-top: 80px;
     }
 }
+
+/* === Login Modal === */
+.modal {
+    display: none;
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    background: rgba(0, 0, 0, 0.8);
+    justify-content: center;
+    align-items: center;
+    z-index: 10000;
+}
+
+.modal-content {
+    background: #1a1a1a;
+    border: 1px solid #333;
+    border-radius: 12px;
+    padding: 0;
+    width: 100%;
+    max-width: 400px;
+    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
+}
+
+.modal-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    padding: 20px 24px;
+    border-bottom: 1px solid #333;
+}
+
+.modal-header h2 {
+    margin: 0;
+    font-size: 18px;
+    color: #e0e0e0;
+}
+
+.modal-close {
+    background: none;
+    border: none;
+    color: #888;
+    font-size: 24px;
+    cursor: pointer;
+    padding: 0;
+    width: 32px;
+    height: 32px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+}
+
+.modal-close:hover {
+    color: #fff;
+}
+
+.modal-body {
+    padding: 24px;
+}
+
+.form-group {
+    margin-bottom: 16px;
+}
+
+.form-group label {
+    display: block;
+    margin-bottom: 6px;
+    color: #aaa;
+    font-size: 13px;
+}
+
+.form-group input {
+    width: 100%;
+    padding: 10px 12px;
+    background: #0d0d0d;
+    border: 1px solid #333;
+    border-radius: 6px;
+    color: #e0e0e0;
+    font-size: 14px;
+}
+
+.form-group input:focus {
+    outline: none;
+    border-color: #4a9eff;
+}
+
+.btn-primary {
+    width: 100%;
+    padding: 12px;
+    background: #4a9eff;
+    color: white;
+    border: none;
+    border-radius: 6px;
+    font-size: 14px;
+    font-weight: 600;
+    cursor: pointer;
+}
+
+.btn-primary:hover {
+    background: #3a8eef;
+}
+
+.login-error {
+    margin-bottom: 16px;
+    padding: 10px 12px;
+    background: rgba(255, 107, 107, 0.1);
+    border: 1px solid #ff6b6b;
+    border-radius: 6px;
+    color: #ff6b6b;
+    font-size: 13px;
+}

public/claude-ide/projects-landing.js

@@ -27,10 +27,73 @@ async function checkAuth() {
         const data = await res.json();
 
         if (!data.authenticated) {
-            window.location.href = '/claude/login.html';
+            // Show login modal instead of redirecting
+            showLoginModal();
+            return;
+        }
+
+        // Update nav with username
+        if (data.username) {
+            document.querySelector('.nav-logo').textContent = `Claude Code (${data.username})`;
         }
     } catch (error) {
-        console.error('Auth check failed:', error);
+        console.error('[checkAuth] Error:', error);
+        showLoginModal();
+    }
+}
+
+// Show login modal
+function showLoginModal() {
+    const modal = document.getElementById('login-modal');
+    if (modal) {
+        modal.style.display = 'flex';
+    }
+}
+
+// Close login modal
+function closeLoginModal() {
+    const modal = document.getElementById('login-modal');
+    if (modal) {
+        modal.style.display = 'none';
+    }
+}
+
+// Handle login form submission
+async function handleLogin(event) {
+    event.preventDefault();
+
+    const username = document.getElementById('login-username').value;
+    const password = document.getElementById('login-password').value;
+    const errorDiv = document.getElementById('login-error');
+
+    try {
+        const res = await fetch('/claude/api/login', {
+            method: 'POST',
+            credentials: 'same-origin',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ username, password })
+        });
+
+        const data = await res.json();
+
+        if (data.success) {
+            // Login successful
+            closeLoginModal();
+            loadProjects();
+
+            // Update nav with username
+            if (data.username) {
+                document.querySelector('.nav-logo').textContent = `Claude Code (${data.username})`;
+            }
+        } else {
+            // Show error
+            errorDiv.textContent = data.error || 'Login failed';
+            errorDiv.style.display = 'block';
+        }
+    } catch (error) {
+        console.error('[handleLogin] Error:', error);
+        errorDiv.textContent = 'Login failed. Please try again.';
+        errorDiv.style.display = 'block';
     }
 }