fix(tui_gateway): strip ANSI from slash-worker output for desktop chat

Desktop chat bubbles render plain text, but a worker-routed command that
builds its own Rich Console (e.g. /journey) picks up truecolor from the
gateway's inherited COLORTERM and leaks raw escapes into the bubble. Strip
ANSI at the single worker-return choke point so every command renders cleanly.
The TUI opens /journey as an overlay, so it never travels this path.

tests/tui_gateway/test_slash_worker_ansi.py

@@ -0,0 +1,23 @@
+"""The slash worker feeds desktop chat bubbles, which render plain text — so
+any ANSI a worker-routed command emits (e.g. /journey's own Rich Console) must
+be stripped from the worker's return value."""
+
+from __future__ import annotations
+
+
+class _FakeCLI:
+    console = None
+
+    def process_command(self, cmd: str) -> None:
+        import sys
+
+        sys.stdout.write("\x1b[38;2;1;2;3mcolored\x1b[0m plain")
+
+
+def test_run_strips_ansi_from_output():
+    from tui_gateway import slash_worker
+
+    out = slash_worker._run(_FakeCLI(), "/anything")
+
+    assert "\x1b[" not in out
+    assert out == "colored plain"

tui_gateway/slash_worker.py

@@ -102,7 +102,14 @@ def _run(cli: HermesCLI, command: str) -> str:
         if old is not None:
             cli_mod._cprint = old
 
-    return buf.getvalue().rstrip()
+    # Desktop chat bubbles render plain text, not ANSI. A worker-routed command
+    # that emits Rich color (e.g. /journey building its own Console, which picks
+    # up truecolor from the gateway's inherited COLORTERM) would otherwise leak
+    # raw escapes; strip them at the single choke point. (The TUI opens /journey
+    # as an overlay, so it never travels this path.)
+    from tools.ansi_strip import strip_ansi
+
+    return strip_ansi(buf.getvalue().rstrip())
 
 
 def main():