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fix(dashboard): advertise truecolor to the embedded chat TUI (#60576)

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Headless/hosted deploys run the dashboard server without COLORTERM in
the process environment, so chalk inside the PTY-spawned TUI child
downgraded every skin hex color to the xterm 256 palette — the default
skin's bronze banner border (#CD7F32) snapped to palette 173 (#D7875F,
salmon red) and the gold caduceus rendered red/yellow on fresh cloud
instances. Local launches never reproduced it because the operator's
interactive terminal leaks COLORTERM=truecolor into the server env.

xterm.js always renders 24-bit RGB, so the dashboard PTY child should
always advertise truecolor: backfill COLORTERM=truecolor in
_resolve_chat_argv via setdefault (an explicit operator value wins).

Verified with a clean-env PTY probe of the real TUI binary:
no COLORTERM -> 0 truecolor SGRs / 165 palette-256 (salmon 38;5;173);
with the backfill -> 166 truecolor SGRs, exact bronze 38;2;205;127;50.
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Teknium 2026-07-07 17:17:51 -07:00 • committed by GitHub
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11
hermes_cli/web_server.py
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@ -13087,6 +13087,17 @@ def _resolve_chat_argv(
# the dashboard PTY path.
env.setdefault("HERMES_TUI_DISABLE_MOUSE", "1")
env.setdefault("HERMES_TUI_INLINE", "1")
# The dashboard terminal is xterm.js, which always renders 24-bit RGB.
# But chalk inside the TUI child decides its color depth from the
# SERVER process env — and hosted/cloud deploys run the dashboard under
# a process manager (container init, systemd) with no COLORTERM, so
# chalk downgrades every hex color to the xterm 256 palette. The skin's
# bronze border #CD7F32 snaps to palette 173 (#D7875F, salmon-red) and
# the banner reads red/yellow instead of gold. Local launches dodge
# this only because the operator's interactive terminal leaks
# COLORTERM=truecolor into os.environ. Backfill it for the PTY child;
# setdefault so an explicit operator value still wins.
env.setdefault("COLORTERM", "truecolor")
env["HERMES_TUI_DASHBOARD"] = "1"
if profile_dir is not None: