feat(engine): resume-gate variants + entry-gate --own + phase-completed --paths (7b)

[leeovery]

Stage 7b of the render-surfaces programme (design log: #489; base: #499). The classification census's class 2: ten templated prose sites folding onto surfaces this stack already built.

What

resume-gate becomes the resume-menu family (--variant):

• plan — planning's resume menu; the "(previously reached phase N, task M)" parenthetical derives from the planning item (omitted when absent). The spec-change summary stays prose — judgment — emitted above the menu.
• review — both review resume shapes derived engine-side from reviewed_tasks/completed_tasks: the coverage menu ("Review covered R of C tasks…") while unreviewed tasks remain, else the all-reviewed/bare menu. The prose @if/count arithmetic is gone.
• scoping — the revisit wording.
• session — bare work-unit address; the interrupted-discovery-session menu from the active_session marker.

entry-gate --own (specification only) — the topic's OWN terminal statuses at entry: superseded naming its successor, promoted naming its cross-cutting unit. The two validate-phase terminal branches collapse to one branch, one call.

phase-completed --paths — scoping's conclusion display with the derived spec/plan paths. Deliberate unification: "Scoping complete for" → canonical "Scoping completed for".

The four continue- finalise blocks deleted* — workunit complete gains --pipeline at those four call sites and the transaction's existing banner renders byte-identically ("Bugfix/Cross-Cutting/Feature/Quick-Fix Completed").

Test plan

• Variant matrix: plan with/without position; review coverage, all-reviewed, and no-tracking shapes; scoping; session found/missing-loud; unknown-variant and triage-with-variant loud.
• entry-gate --own: superseded byte-exact, promoted, live statuses clear, non-specification loud.
• phase-completed --paths byte-exact.
• npm test — 1528/1528. Typecheck + conventions lint clean.

🤖 Generated with Claude Code

Stack

1. feat(engine): render surface catalogue — resume-gate and task-list pilots #490
2. feat(engine): finding + findings-summary surfaces — review-findings loop unified #491
3. feat(engine): task-gate surfaces — proposed-task, tasks-overview, author-task-gate, phase-tree #492
4. feat(engine): selection projection + bridge continuation surfaces #493
5. feat(engine): transaction confirmation sections — lifecycle verbs carry their own chrome #496
6. feat(engine): entry-gate + phase-note — entry validation derives engine-side #497
7. feat(engine): the fence is the frame — boxedFrame retired (D8) #498
8. feat(engine): topic complete + discovery-session close fold their kb warnings (7a) #499
9. feat(engine): resume-gate variants + entry-gate --own + phase-completed --paths (7b) #500 👈 current
10. test(conventions): templated-fence ratchet — check 13 lands D4 (7c) #501