Reported during TUI v2 blitz retest: /resume modal only surfaced tui/cli
rows, even though `hermes --tui --resume <id>` with a pasted telegram
session id works fine. The handler double-fetched with explicit
`source="tui"` and `source="cli"` filters and dropped everything else on
the floor.
Drop the filter — list_sessions_rich(source=None) already excludes
child sessions (subagents, compression continuations) via its default,
and users want to resume messenger sessions from inside the TUI.
Adds gateway regression coverage.
0dfb7b8a0d