Complete private Monero miner control stack.

Implement Windows agent with RandomX mining and WebSocket fleet reporting, wire dashboard settings into the builder with saved exe paths, and add project README.

server/web/src/components/Layout/Layout.css

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+.layout {
+  display: flex;
+  min-height: 100vh;
+}
+
+.sidebar {
+  width: 240px;
+  background: var(--bg-secondary);
+  border-right: 1px solid var(--border-color);
+  display: flex;
+  flex-direction: column;
+  position: fixed;
+  top: 0;
+  left: 0;
+  bottom: 0;
+  z-index: 100;
+}
+
+.sidebar-header {
+  padding: 1.25rem 1rem;
+  border-bottom: 1px solid var(--border-color);
+}
+
+.logo {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+}
+
+.logo-icon {
+  font-size: 1.5rem;
+}
+
+.logo-text {
+  font-size: 1.25rem;
+  font-weight: 700;
+  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
+  -webkit-background-clip: text;
+  -webkit-text-fill-color: transparent;
+  background-clip: text;
+}
+
+.sidebar-nav {
+  flex: 1;
+  padding: 0.75rem 0.5rem;
+  display: flex;
+  flex-direction: column;
+  gap: 0.25rem;
+}
+
+.nav-item {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+  padding: 0.75rem 1rem;
+  border-radius: 8px;
+  color: var(--text-secondary);
+  text-decoration: none;
+  font-size: 0.875rem;
+  font-weight: 500;
+  transition: all 0.2s ease;
+}
+
+.nav-item:hover {
+  background: var(--bg-hover);
+  color: var(--text-primary);
+  text-decoration: none;
+}
+
+.nav-item.active {
+  background: rgba(59, 130, 246, 0.15);
+  color: var(--accent-blue);
+}
+
+.nav-icon {
+  font-size: 1.125rem;
+  width: 1.5rem;
+  text-align: center;
+}
+
+.nav-label {
+  white-space: nowrap;
+}
+
+.sidebar-footer {
+  padding: 1rem;
+  border-top: 1px solid var(--border-color);
+}
+
+.version-badge {
+  font-size: 0.75rem;
+  color: var(--text-muted);
+  text-align: center;
+}
+
+.main-content {
+  flex: 1;
+  margin-left: 240px;
+  padding: 1.5rem 2rem;
+  min-height: 100vh;
+}
+
+@media (max-width: 768px) {
+  .sidebar {
+    width: 60px;
+  }
+
+  .logo-text,
+  .nav-label,
+  .sidebar-footer {
+    display: none;
+  }
+
+  .sidebar-header {
+    padding: 1rem 0.75rem;
+  }
+
+  .nav-item {
+    justify-content: center;
+    padding: 0.75rem;
+  }
+
+  .main-content {
+    margin-left: 60px;
+    padding: 1rem;
+  }
+}

server/web/src/components/Layout/Layout.tsx

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+import { ReactNode } from 'react';
+import { NavLink } from 'react-router-dom';
+import './Layout.css';
+
+interface LayoutProps {
+  children: ReactNode;
+}
+
+export default function Layout({ children }: LayoutProps) {
+  return (
+    <div className="layout">
+      <nav className="sidebar">
+        <div className="sidebar-header">
+          <div className="logo">
+            <span className="logo-icon">⛏️</span>
+            <span className="logo-text">MinerCMD</span>
+          </div>
+        </div>
+
+        <div className="sidebar-nav">
+          <NavLink to="/dashboard" className={({ isActive }) => `nav-item ${isActive ? 'active' : ''}`}>
+            <span className="nav-icon">📊</span>
+            <span className="nav-label">Dashboard</span>
+          </NavLink>
+          <NavLink to="/agents" className={({ isActive }) => `nav-item ${isActive ? 'active' : ''}`}>
+            <span className="nav-icon">🖥️</span>
+            <span className="nav-label">Agents</span>
+          </NavLink>
+          <NavLink to="/builder" className={({ isActive }) => `nav-item ${isActive ? 'active' : ''}`}>
+            <span className="nav-icon">🔨</span>
+            <span className="nav-label">Miner Builder</span>
+          </NavLink>
+          <NavLink to="/settings" className={({ isActive }) => `nav-item ${isActive ? 'active' : ''}`}>
+            <span className="nav-icon">⚙️</span>
+            <span className="nav-label">Settings</span>
+          </NavLink>
+        </div>
+
+        <div className="sidebar-footer">
+          <div className="version-badge">v1.0.0</div>
+        </div>
+      </nav>
+
+      <main className="main-content">
+        {children}
+      </main>
+    </div>
+  );
+}