fix(tui): address copilot review on #14103

- normalizeStatusBar: trim/lowercase + 'on' → 'top' alias so user-edited
  YAML variants (Top, " bottom ", on) coerce correctly
- shift-tab yolo: no-op with sys note when no live session; success-gated
  echo and catch fallback so RPC failures don't report as 'yolo off'
- tui_gateway config.set/get statusbar: isinstance(display, dict) guards
  mirroring the compact branch so a malformed display scalar in config.yaml
  can't raise

Tests: +1 vitest for trim/case/on, +2 pytest for non-dict display survival.

ui-tui/src/__tests__/useConfigSync.test.ts

@@ -105,4 +105,11 @@ describe('normalizeStatusBar', () => {
     expect(normalizeStatusBar('sideways')).toBe('top')
     expect(normalizeStatusBar(42)).toBe('top')
   })
+
+  it('trims whitespace and folds case', () => {
+    expect(normalizeStatusBar(' Bottom ')).toBe('bottom')
+    expect(normalizeStatusBar('TOP')).toBe('top')
+    expect(normalizeStatusBar('  on  ')).toBe('top')
+    expect(normalizeStatusBar('OFF')).toBe('off')
+  })
 })