Added Perf details to profiler control

src/myfasthtml/assets/core/profiler.css

@@ -230,6 +230,11 @@
     flex-direction: column;
 }
 
+/* details wrapper: no extra spacing */
+.mf-profiler-span-tree-content details {
+    display: contents;
+}
+
 .mf-profiler-span-row {
     display: flex;
     align-items: center;
@@ -237,6 +242,31 @@
     border-bottom: 1px solid color-mix(in oklab, var(--color-border) 50%, transparent);
 }
 
+/* summary reuses the same row style — override browser defaults */
+summary.mf-profiler-span-row {
+    list-style: none;
+    cursor: pointer;
+}
+
+summary.mf-profiler-span-row::marker,
+summary.mf-profiler-span-row::-webkit-details-marker {
+    display: none;
+}
+
+summary.mf-profiler-span-row::before {
+    content: '▶';
+    font-size: 8px;
+    flex-shrink: 0;
+    margin-right: 4px;
+    display: inline-block;
+    transition: transform 0.15s ease;
+    color: color-mix(in oklab, var(--color-base-content) 40%, transparent);
+}
+
+details[open] > summary.mf-profiler-span-row::before {
+    transform: rotate(90deg);
+}
+
 .mf-profiler-span-row:last-child {
     border-bottom: none;
 }
@@ -288,6 +318,11 @@
     background: var(--color-primary);
 }
 
+.mf-profiler-span-bar.mf-profiler-fast {
+    background: var(--color-success);
+}
+
+
 .mf-profiler-span-bar.mf-profiler-medium {
     background: var(--color-warning);
 }