feat(planning): show the session shorthand glossary on the interview page #9723

Parent

Refs #5796

Depends on

• none: on the frontier now

Outcome

Coined session terms are defined on the page (gap G12): a glossary op records term and definition, a Terms
panel lists them, and each defined term in question text shows its definition on hover.

Key interfaces

• Interview page: plugins/planning/surface/index.html; page server: plugins/planning/surface/server.py
  (record(), derive_states); round CLI: plugins/planning/surface/round.py behind round.sh;
  exporters: plugins/planning/surface/exporters.py.
• The interview skill's surface contract, plugins/planning/skills/interview/context/surface.md, documents
  every new op, field, setting and refusal.

Done when

• A round test applies a glossary op and finds the term in the page state.
• A page test shows the Terms panel and a hover definition on a term used in a question.
• scripts/run-test-file.sh plugins/planning/surface/test_server.py exits 0.
• scripts/run-test-file.sh plugins/planning/surface/test_round.py exits 0.
• bash plugins/planning/surface/surface.test.sh exits 0, so a data dir without the new fields still loads, renders and exports.
• scripts/check-changelog-fragments.sh --check-required origin/main exits 0.