fix(tui): include child transcripts in resume picker

[mzkarami]

What does this PR do?

Makes the TUI historical session picker and auto-resume path include message-bearing child sessions, while continuing to filter empty shell/internal tool-only rows.

This addresses the case where real transcripts are stored as child sessions but the TUI resume picker surfaces parent/compression shell rows instead, making valid sessions hard to resume from the TUI.

Related Issue

Refs #35542

Type of Change

• 🐛 Bug fix (non-breaking change that fixes an issue)
• ✨ New feature (non-breaking change that adds functionality)
• 🔒 Security fix
• 📝 Documentation update
• ✅ Tests (adding or improving test coverage)
• ♻️ Refactor (no behavior change)
• 🎯 New skill (bundled or hub)

Changes Made

• tui_gateway/server.py
  • Passes include_children=True when listing historical sessions for session.list.
  • Passes include_children=True when resolving session.most_recent.
  • Keeps the existing source deny-list for internal tool rows.
• tests/test_tui_gateway_server.py
  • Adds regression coverage showing session.list includes message-bearing child sessions.
  • Adds regression coverage showing session.most_recent prefers the newest resumable child transcript over empty shell rows.
• tests/gateway/test_session_list_allowed_sources.py
  • Keeps allowed-source fixture rows message-bearing so they are not filtered as empty sessions.

How to Test

1. Run whitespace/conflict-marker validation:
   • git diff --check
2. Run the focused TUI gateway regression suite:
   • python -m pytest tests/test_tui_gateway_server.py -q
3. Run the allowed-source regression tests:
   • python -m pytest tests/gateway/test_session_list_allowed_sources.py -q
4. Run the CI-equivalent shard containing the changed gateway test:
   • HERMES_TEST_WORKERS=8 python scripts/run_tests_parallel.py --slice 5/6

Checklist

Code

• I've read the Contributing Guide
• My commit messages follow Conventional Commits (fix(scope):, feat(scope):, etc.)
• I searched for existing PRs to make sure this isn't a duplicate
• My PR contains only changes related to this fix/feature (no unrelated commits)
• I've run pytest tests/ -q and all tests pass
• I've added tests for my changes (required for bug fixes, strongly encouraged for features)
• I've tested on my platform: Linux

Documentation & Housekeeping

• I've updated relevant documentation (README, docs/, docstrings) — N/A: no docs surface changed
• I've updated cli-config.yaml.example if I added/changed config keys — N/A: no config keys changed
• I've updated CONTRIBUTING.md or AGENTS.md if I changed architecture or workflows — N/A: no architecture/workflow changed
• I've considered cross-platform impact (Windows, macOS) per the compatibility guide — no platform-specific APIs added
• I've updated tool descriptions/schemas if I changed tool behavior — N/A: TUI gateway session listing only

For New Skills

N/A — this PR does not add a skill.

Screenshots / Logs

Focused tests:

python -m pytest tests/gateway/test_session_list_allowed_sources.py tests/test_tui_gateway_server.py -q
192 passed, 1 warning

CI-equivalent shard:

HERMES_TEST_WORKERS=8 python scripts/run_tests_parallel.py --slice 5/6
5105 tests passed, 0 failed

[alt-glitch]

Duplicate of #35544, which addresses the same bug (#35542) with the same approach: passing include_children=True to list_sessions_rich() in session.list and session.most_recent handlers.

[mzkarami]

duplicate