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/app/useConfigSync.ts

@@ -16,12 +16,20 @@ import { patchUiState } from './uiStore.js'
 
 const STATUSBAR_MODES = new Set<StatusBarMode>(['bottom', 'off', 'top'])
 
-export const normalizeStatusBar = (raw: unknown): StatusBarMode =>
-  raw === false
-    ? 'off'
-    : typeof raw === 'string' && STATUSBAR_MODES.has(raw as StatusBarMode)
-      ? (raw as StatusBarMode)
-      : 'top'
+export const normalizeStatusBar = (raw: unknown): StatusBarMode => {
+  if (raw === false) {
+    return 'off'
+  }
+
+  if (typeof raw !== 'string') {
+    return 'top'
+  }
+
+  const v = raw.trim().toLowerCase()
+  const mode = (v === 'on' ? 'top' : v) as StatusBarMode
+
+  return STATUSBAR_MODES.has(mode) ? mode : 'top'
+}
 
 const MTIME_POLL_MS = 5000