Add MCP server management + fix OAuth

frontend/src/App.jsx

@@ -16,6 +16,9 @@ const App = () => {
   const [systemInfo, setSystemInfo] = useState(null);
   const [usageStats, setUsageStats] = useState(null);
   const [authStatus, setAuthStatus] = useState(null);
+  const [mcpServers, setMcpServers] = useState(null);
+  const [showAddMcp, setShowAddMcp] = useState(false);
+  const [mcpForm, setMcpForm] = useState({ name: '', server_type: 'sse', url: '', command: '' });
   const [loading, setLoading] = useState(false);
   const [activeView, setActiveView] = useState('tasks'); // 'tasks' | 'dashboard'
 
@@ -25,11 +28,13 @@ const App = () => {
     fetchSystemInfo();
     fetchUsageStats();
     fetchAuthStatus();
+    fetchMcpServers();
     const interval = setInterval(() => {
       fetchTasks();
       fetchSystemInfo();
       fetchUsageStats();
       fetchAuthStatus();
+      fetchMcpServers();
     }, 10000);
     return () => clearInterval(interval);
   }, []);
@@ -103,6 +108,47 @@ const App = () => {
     }
   };
 
+  const fetchMcpServers = async () => {
+    try {
+      const response = await fetch('/api/mcp/servers');
+      const data = await response.json();
+      setMcpServers(data);
+    } catch (error) {
+      console.error('Error fetching MCP servers:', error);
+    }
+  };
+
+  const handleAddMcp = async (e) => {
+    e.preventDefault();
+    try {
+      const response = await fetch('/api/mcp/servers', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify(mcpForm)
+      });
+      const data = await response.json();
+      if (data.status === 'ok') {
+        setShowAddMcp(false);
+        setMcpForm({ name: '', server_type: 'sse', url: '', command: '' });
+        fetchMcpServers();
+      } else {
+        alert(data.message || 'Failed to add MCP server');
+      }
+    } catch (error) {
+      console.error('Error adding MCP server:', error);
+    }
+  };
+
+  const handleRemoveMcp = async (name) => {
+    if (!confirm(`Remove MCP server "${name}"?`)) return;
+    try {
+      await fetch(`/api/mcp/servers/${name}`, { method: 'DELETE' });
+      fetchMcpServers();
+    } catch (error) {
+      console.error('Error removing MCP server:', error);
+    }
+  };
+
   const handleCreateTask = async (e) => {
     e.preventDefault();
     setLoading(true);
@@ -278,6 +324,56 @@ const App = () => {
               </div>
             </div>
 
+            <div className="dashboard-section">
+              <h3>MCP Servers</h3>
+              <div className="mcp-panel">
+                {mcpServers?.servers?.length > 0 ? (
+                  <div className="mcp-list">
+                    {mcpServers.servers.map((srv, i) => (
+                      <div key={i} className="mcp-row">
+                        <span className="mcp-status-dot connected"></span>
+                        <span className="mcp-name">{srv.name || srv}</span>
+                        <span className="mcp-details">{srv.details || srv.url || srv.type || ''}</span>
+                        <button className="btn-icon" onClick={() => handleRemoveMcp(srv.name || srv)} title="Remove">✕</button>
+                      </div>
+                    ))}
+                  </div>
+                ) : (
+                  <div className="mcp-empty">
+                    <p>No MCP servers configured.</p>
+                    {mcpServers?.raw && <pre className="mcp-raw">{mcpServers.raw}</pre>}
+                  </div>
+                )}
+
+                {showAddMcp ? (
+                  <form className="mcp-add-form" onSubmit={handleAddMcp}>
+                    <div className="mcp-form-row">
+                      <input type="text" placeholder="Server name" value={mcpForm.name}
+                        onChange={e => setMcpForm({...mcpForm, name: e.target.value})} required />
+                      <select value={mcpForm.server_type}
+                        onChange={e => setMcpForm({...mcpForm, server_type: e.target.value})}>
+                        <option value="sse">SSE (URL)</option>
+                        <option value="stdio">Stdio (Command)</option>
+                      </select>
+                    </div>
+                    {mcpForm.server_type === 'sse' ? (
+                      <input type="url" placeholder="https://mcp-server-url/mcp" value={mcpForm.url}
+                        onChange={e => setMcpForm({...mcpForm, url: e.target.value})} required />
+                    ) : (
+                      <input type="text" placeholder="Command (e.g. npx mcp-server)" value={mcpForm.command}
+                        onChange={e => setMcpForm({...mcpForm, command: e.target.value})} required />
+                    )}
+                    <div className="mcp-form-actions">
+                      <button type="submit" className="btn btn-primary btn-sm">Add Server</button>
+                      <button type="button" className="btn btn-secondary btn-sm" onClick={() => setShowAddMcp(false)}>Cancel</button>
+                    </div>
+                  </form>
+                ) : (
+                  <button className="btn btn-secondary btn-sm mcp-add-btn" onClick={() => setShowAddMcp(true)}>+ Add MCP Server</button>
+                )}
+              </div>
+            </div>
+
             <div className="dashboard-section">
               <h3>Claude API Usage</h3>
               <div className="usage-grid">