fix: Resolve TSCM function strip visibility and clipping issues

- Fix function strip content being clipped by changing overflow to visible
- Add min-height and increased padding to function strip
- Add explicit colors for TSCM strip stat values and labels
- Fix output-panel overflow for TSCM mode using :has() selector
- Add CSS variables --bg-dark and --bg-panel aliases
- Clean up sidebar section margins for consistent spacing
- Add unique IDs to WiFi/Bluetooth export sections for restore function

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

static/css/core/variables.css

@@ -17,6 +17,10 @@
     --bg-elevated: #1a202c;
     --bg-overlay: rgba(0, 0, 0, 0.7);
 
+    /* Background aliases for components */
+    --bg-dark: var(--bg-primary);
+    --bg-panel: var(--bg-secondary);
+
     /* Accent colors */
     --accent-cyan: #4a9eff;
     --accent-cyan-dim: rgba(74, 158, 255, 0.15);
@@ -150,6 +154,10 @@
     --bg-elevated: #f8fafc;
     --bg-overlay: rgba(255, 255, 255, 0.9);
 
+    /* Background aliases for components */
+    --bg-dark: var(--bg-primary);
+    --bg-panel: var(--bg-secondary);
+
     --accent-cyan: #2563eb;
     --accent-cyan-dim: rgba(37, 99, 235, 0.1);
     --accent-cyan-hover: #1d4ed8;