Claude opus authored everything to make the user and task work. First iteration

Provider/frontend/src/lib/Sidebar.svelte

@@ -0,0 +1,135 @@
+<script>
+  let { currentView = 'dashboard', onNavigate = () => {} } = $props();
+  let collapsed = $state(false);
+
+  const navItems = [
+    { id: 'dashboard', label: 'Dashboard', icon: '🏠' },
+    { id: 'tasks', label: 'Tasks', icon: '📋' },
+  ];
+</script>
+
+<aside class="sidebar {collapsed ? 'collapsed' : ''}">
+  <div class="sidebar-header">
+    {#if !collapsed}
+      <span class="sidebar-title">Menu</span>
+    {/if}
+    <button
+      class="collapse-btn"
+      onclick={() => collapsed = !collapsed}
+      title={collapsed ? 'Expand' : 'Collapse'}
+    >
+      {collapsed ? '▶' : '◀'}
+    </button>
+  </div>
+
+  <nav class="sidebar-nav">
+    {#each navItems as item}
+      <button
+        class="nav-item {currentView === item.id ? 'active' : ''}"
+        onclick={() => onNavigate(item.id)}
+        title={item.label}
+      >
+        <span class="nav-icon">{item.icon}</span>
+        {#if !collapsed}
+          <span class="nav-label">{item.label}</span>
+        {/if}
+      </button>
+    {/each}
+  </nav>
+</aside>
+
+<style>
+  .sidebar {
+    width: 200px;
+    min-height: 100vh;
+    background: var(--color-bg-card);
+    border-right: 1px solid var(--color-border);
+    display: flex;
+    flex-direction: column;
+    transition: width 0.25s ease;
+    flex-shrink: 0;
+  }
+
+  .sidebar.collapsed {
+    width: 56px;
+  }
+
+  .sidebar-header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 16px 12px;
+    border-bottom: 1px solid var(--color-border);
+    min-height: 56px;
+  }
+
+  .sidebar-title {
+    font-size: 12px;
+    font-weight: 700;
+    text-transform: uppercase;
+    letter-spacing: 0.05em;
+    color: var(--color-text-secondary);
+    white-space: nowrap;
+    overflow: hidden;
+  }
+
+  .collapse-btn {
+    background: none;
+    border: none;
+    color: var(--color-text-secondary);
+    cursor: pointer;
+    padding: 4px;
+    font-size: 10px;
+    border-radius: 4px;
+    transition: color 0.15s, background 0.15s;
+    flex-shrink: 0;
+  }
+
+  .collapse-btn:hover {
+    color: var(--color-text-primary);
+    background: var(--color-bg-card-hover);
+  }
+
+  .sidebar-nav {
+    display: flex;
+    flex-direction: column;
+    gap: 4px;
+    padding: 8px;
+  }
+
+  .nav-item {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    padding: 10px 12px;
+    border: none;
+    border-radius: 8px;
+    background: transparent;
+    color: var(--color-text-secondary);
+    cursor: pointer;
+    font-size: 13px;
+    font-weight: 500;
+    transition: all 0.15s;
+    white-space: nowrap;
+    text-align: left;
+  }
+
+  .nav-item:hover {
+    background: var(--color-bg-card-hover);
+    color: var(--color-text-primary);
+  }
+
+  .nav-item.active {
+    background: color-mix(in srgb, var(--color-accent) 15%, transparent);
+    color: var(--color-accent);
+  }
+
+  .nav-icon {
+    font-size: 16px;
+    flex-shrink: 0;
+  }
+
+  .nav-label {
+    overflow: hidden;
+  }
+</style>