Enhanced TUI with split flow details and timing analysis

- Added ΔT (deltaT), σ (sigma), and outlier count columns to flow table
- Split right panel into top (main flow) and bottom (sub-flow) sections
- Removed inner panel borders for clean 3-panel layout
- Added sub-flow selection logic with detailed timing statistics
- Implemented per-frame-type timing analysis in sub-flow details
- Color-coded outliers and timing data for quick visual assessment

analyzer/tui/textual/styles/streamlens_v2.tcss

@@ -35,15 +35,13 @@ MetricCard {
     padding: 0;
 }
 
-/* Panel Styling - Minimal borders */
+/* Panel Styling - No borders for clean look */
 .panel {
-    border: solid #99ccff;
     padding: 0;
     margin: 0;
 }
 
 .panel-wide {
-    border: solid #99ccff;
     padding: 0;
     margin: 0;
 }
@@ -62,13 +60,25 @@ MetricCard {
     padding: 0;
 }
 
-/* Right Panel - Details (compact) */
-#right-panel {
+/* Right Panels - Details (compact) */
+#right-panels {
     width: 25%;
     background: #1a1a1a;
     padding: 0;
 }
 
+FlowMainDetailsPanel {
+    height: 3fr;
+    background: #1a1a1a;
+    border: solid #ff8800;
+}
+
+SubFlowDetailsPanel {
+    height: 2fr;
+    background: #1a1a1a;
+    border: solid #ff8800;
+}
+
 /* Sparkline Charts */
 SparklineWidget {
     height: 5;
@@ -188,9 +198,6 @@ DataTable:focus {
     border: solid #00ffcc;
 }
 
-/* Panel Borders */
-Static {
-    border: round #0080ff;
-}
+/* Panel Borders - Removed for clean look */
 
 /* End of styles */