fix(ui): resolve app.css 302 redirect by copying wwwroot files

- Copy Client/app.css to Server/wwwroot/app.css
- Ensure MapStaticAssets() properly serves static files
- All CSS files now return 200 OK (app.css, MudBlazor.min.css)
- Playwright test verified: 1 passed
- Login page styling fully functional

CSS Status:
✅ app.css: 200 OK
✅ MudBlazor.min.css: 200 OK
✅ Blazor framework CSS: 200 OK

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

src/dotnet/QuantEngine.Web/wwwroot/app.css

@@ -0,0 +1,297 @@
+/* QuantEngine Global Styles */
+
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+}
+
+html, body {
+    height: 100%;
+}
+
+body {
+    font-family: 'Roboto', sans-serif;
+    font-size: 14px;
+    font-weight: 400;
+    line-height: 1.5;
+    color: var(--mud-palette-text-primary, #212121);
+    background-color: var(--mud-palette-background, #fafafa);
+    transition: background-color 0.3s ease, color 0.3s ease;
+}
+
+#app {
+    display: flex;
+    flex-direction: column;
+    height: 100%;
+}
+
+/* Scrollbar Styling */
+::-webkit-scrollbar {
+    width: 8px;
+    height: 8px;
+}
+
+::-webkit-scrollbar-track {
+    background: var(--mud-palette-surface, #ffffff);
+}
+
+::-webkit-scrollbar-thumb {
+    background: var(--mud-palette-action-default, #c0c0c0);
+    border-radius: 4px;
+}
+
+::-webkit-scrollbar-thumb:hover {
+    background: var(--mud-palette-primary, #3f51b5);
+}
+
+/* Text Utilities */
+.text-primary {
+    color: var(--mud-palette-primary, #3f51b5);
+}
+
+.text-secondary {
+    color: var(--mud-palette-secondary, #f50057);
+}
+
+.text-success {
+    color: var(--mud-palette-success, #4caf50);
+}
+
+.text-warning {
+    color: var(--mud-palette-warning, #ff9800);
+}
+
+.text-error {
+    color: var(--mud-palette-error, #f44336);
+}
+
+.text-muted {
+    color: var(--mud-palette-text-secondary, rgba(0,0,0,0.6));
+}
+
+/* Spacing Utilities */
+.mt-1 { margin-top: 0.25rem; }
+.mt-2 { margin-top: 0.5rem; }
+.mt-3 { margin-top: 1rem; }
+.mt-4 { margin-top: 1.5rem; }
+.mt-5 { margin-top: 3rem; }
+
+.mb-1 { margin-bottom: 0.25rem; }
+.mb-2 { margin-bottom: 0.5rem; }
+.mb-3 { margin-bottom: 1rem; }
+.mb-4 { margin-bottom: 1.5rem; }
+.mb-5 { margin-bottom: 3rem; }
+
+.mx-auto { margin-left: auto; margin-right: auto; }
+.my-auto { margin-top: auto; margin-bottom: auto; }
+
+.px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
+.px-4 { padding-left: 1rem; padding-right: 1rem; }
+.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
+.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
+
+/* Flex Utilities */
+.d-flex {
+    display: flex;
+}
+
+.flex-column {
+    flex-direction: column;
+}
+
+.align-items-center {
+    align-items: center;
+}
+
+.justify-content-center {
+    justify-content: center;
+}
+
+.justify-content-between {
+    justify-content: space-between;
+}
+
+/* Gap Utilities */
+.gap-1 { gap: 0.25rem; }
+.gap-2 { gap: 0.5rem; }
+.gap-3 { gap: 1rem; }
+.gap-4 { gap: 1.5rem; }
+
+/* Loading Skeleton */
+.skeleton {
+    background: linear-gradient(
+        90deg,
+        var(--mud-palette-surface, #fff) 0%,
+        var(--mud-palette-divider, #e0e0e0) 50%,
+        var(--mud-palette-surface, #fff) 100%
+    );
+    background-size: 200% 100%;
+    animation: loading 1.5s infinite;
+}
+
+@keyframes loading {
+    0% {
+        background-position: 200% 0;
+    }
+    100% {
+        background-position: -200% 0;
+    }
+}
+
+/* MudBlazor Overrides */
+.mud-appbar {
+    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+}
+
+.mud-drawer {
+    border-right: 1px solid var(--mud-palette-divider, #e0e0e0);
+}
+
+.mud-drawer-content {
+    padding: 1rem;
+}
+
+.mud-nav-link {
+    border-radius: 4px;
+    margin-bottom: 0.25rem;
+    transition: all 0.2s ease;
+}
+
+.mud-nav-link:hover {
+    background-color: var(--mud-palette-action-default-hover, rgba(0, 0, 0, 0.04));
+}
+
+.mud-nav-link.mud-ripple-nav-link-active {
+    background-color: var(--mud-palette-primary-lighten, rgba(63, 81, 181, 0.1));
+    color: var(--mud-palette-primary, #3f51b5);
+    font-weight: 600;
+}
+
+.mud-card {
+    border: 1px solid var(--mud-palette-divider, #e0e0e0);
+    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
+    transition: box-shadow 0.2s ease, transform 0.2s ease;
+}
+
+.mud-card:hover {
+    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
+    transform: translateY(-2px);
+}
+
+.mud-button {
+    text-transform: none;
+    font-weight: 500;
+    padding: 0.5rem 1rem;
+    border-radius: 4px;
+}
+
+.mud-button-root:disabled {
+    opacity: 0.6;
+}
+
+/* Forms */
+.mud-input-control {
+    margin-bottom: 1rem;
+}
+
+.mud-input-label {
+    font-weight: 500;
+}
+
+.mud-input {
+    border-radius: 4px;
+}
+
+.mud-input.mud-input-text {
+    background-color: var(--mud-palette-surface, #ffffff);
+}
+
+/* Tables */
+.mud-table {
+    background-color: var(--mud-palette-surface, #ffffff);
+}
+
+.mud-table-head {
+    background-color: var(--mud-palette-background, #fafafa);
+}
+
+.mud-table-row:hover {
+    background-color: var(--mud-palette-action-default-hover, rgba(0, 0, 0, 0.04));
+}
+
+.mud-table-cell {
+    padding: 1rem;
+    border-color: var(--mud-palette-divider, #e0e0e0);
+}
+
+/* Responsive */
+@media (max-width: 600px) {
+    body {
+        font-size: 13px;
+    }
+
+    .mud-drawer {
+        width: 100% !important;
+        max-width: 90% !important;
+    }
+
+    .mud-appbar {
+        height: 56px;
+    }
+
+    .mud-table-cell {
+        padding: 0.75rem 0.5rem;
+    }
+}
+
+/* Animation Classes */
+.fade-in {
+    animation: fadeIn 0.3s ease-in;
+}
+
+@keyframes fadeIn {
+    from {
+        opacity: 0;
+    }
+    to {
+        opacity: 1;
+    }
+}
+
+.slide-in {
+    animation: slideIn 0.3s ease-in;
+}
+
+@keyframes slideIn {
+    from {
+        transform: translateY(10px);
+        opacity: 0;
+    }
+    to {
+        transform: translateY(0);
+        opacity: 1;
+    }
+}
+
+/* Accessibility */
+@media (prefers-reduced-motion: reduce) {
+    * {
+        animation-duration: 0.01ms !important;
+        animation-iteration-count: 1 !important;
+        transition-duration: 0.01ms !important;
+    }
+}
+
+/* Print Styles */
+@media print {
+    .mud-appbar,
+    .mud-drawer,
+    .no-print {
+        display: none !important;
+    }
+
+    body {
+        background: white;
+    }
+}