Teknium bea49e02a3 fix: route /bg spinner through TUI widget to prevent status bar collision (#3643) ...

Background agent's KawaiiSpinner wrote \r-based animation and stop()
messages through StdoutProxy, colliding with prompt_toolkit's status bar.

Two fixes:
- display.py: use isinstance(out, StdoutProxy) instead of fragile
  hasattr+name check for detecting prompt_toolkit's stdout wrapper
- cli.py: silence bg agent's raw spinner (_print_fn=no-op) and route
  thinking updates through the TUI widget only when no foreground
  agent is active; clear spinner text in finally block with same guard

Closes #2718

Co-authored-by: kshitijk4poor <kshitijk4poor@users.noreply.github.com>

2026-03-28 17:29:37 -07:00

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