[GeekCmore]

fix(ui): display-fidelity and layout-budget hardening (#67 #68 #73 #74)

Summary

Unifies three boundaries behind the audit findings (UX-12/13/14/15/16/17/18/19/23/30) instead of patching each one:

• Display values — internal ids/enums stop reaching the renderer: a settings select/multiselect projects only values the form can represent (off-list scalars become readable options; a hand-edited container reads as unset instead of a raw JSON id), the validator admission error shows a translated sentence while the JSON-pointer detail still goes to the report log, /plugin says update {version}, and clear-key on a non-writable credential no longer claims the provider was removed.
• Width & overflow — one OVERFLOW_ELLIPSIS (…) constant marks every signalling truncation (top rule, panel title/footer, ScrollablePanel frame, degenerate-width clamp); ScrollablePanel reports (start-end/total) and degrades to body rows when the host grant cannot fit the frame; header/body lanes name the rows they drop; the bottom lane keeps a pane's fold affordance visible while clamping.
• Editor-slot budget — screen.editorViewport subtracts the header/bottom lane rows through a width-derived measurement (measuredLaneRows()), and ScrollablePanel derives its body budget from that grant. The subagent panel and its inner transcript share one grant and never lag the dock by a frame; the 2-row status footer + open lanes case keeps the panel title.

What this PR does NOT do

An earlier revision of this description listed work that is not in this diff. To keep review accurate, those items are removed and should be tracked separately:

• No shared core/format.ts. status-jobs.ts singular/plural, hours-aware durations, loader elapsedMs formatting, and displayKey function-key chords are unchanged.
• The goal footer (status-goal.ts) still renders Goal {phase} · n/m · {activation} with armed/disarmed.
• Immutable /version and /changelog still carry a Refresh action.
• The Reminders badge capitalization is unchanged.
• Todo pane rows still omit overflow: 'truncate' and the expanded list still has no size cap.
• The plan-status ellipsis is unchanged.
• The CJK-safe ghost hint (display-column measurement) already existed at the merge base; this PR only replaces the equivalent trimmed.length === 0 with trimmed === ''.

Issue status

• Advances [UX] Settings selects leak raw JSON ids; goal footer leaks internal enums and conflicting tones #67 — settings off-list/non-scalar values render as readable options or unset; validator admission shows a translated sentence. The goal-footer half of the issue is not in this PR.
• Advances [UX] Frame-breaking layout: subagent panel title clipped; CJK ghost hints overflow editor row #68 — the panel body budget derives from the dock's grant (editorViewport via lane rows) and a regression covers the 2-row-footer case. The ghost-hint half was already display-column safe at the merge base.
• Advances [UX][polish] Overflow and truncation consistency across lanes, todo pane, and panels #74 — one overflow-indicator convention; ScrollablePanel exposes a scroll position and degrades at tiny widths/heights; lane rows name what they cut; the fold affordance survives clamping. Todo row truncation and the expanded-list cap are not in this PR.
• Advances [UX][polish] Copy and formatting nits: pluralization, durations, key labels, cryptic badges #73 — /help title capitalized (overlay and panel), clear-key message, update {version} badge, interrupting…, and [image] rendered once. Pluralization, hours durations, loader ms, key-label chords, immutable-panel Refresh, friendly namespace labels, per-engine labels, and the Reminders badge remain.

Verification

pnpm run verify:full (exit 0): test:repo-workflow, typecheck, lint, diagrams:check, build, check:lib (53 lib claims), shots:check (36 shots current), check:agent-docs, check:examples, test:coverage (per-file 100% statements/branches/functions/lines; 3827 passed), smoke:happy (HAPPY_SMOKE_PASS).

New regression coverage:

• pane-todo.spec.ts pins endsWithAffordance against the real todoNode (folded/expanded true, short list false).
• plugin-surface-bridge-pane.spec.ts asserts the overflowKeepsTail classification per node shape instead of only pane registration.
• surface-manager.spec.ts asserts the lane keeps the tail when a pane marks the affordance.
• scrollable-panel.spec.ts covers the compact-height degrade, a zero grant, a non-finite grant, and the … degenerate-width marker.
• terminal.spec.ts covers measuredLaneRows clamping.
• settings-model.spec.ts asserts the projected value for malformed select/multiselect/boolean fields.

Manual acceptance (pending)

1. PROFILE=mayfly-display-layout script/install-dev.sh, then dsh --profile mayfly-display-layout.
2. Primary: a zh ghost hint (<文件路径>) stays inside the editor row; a long todo list folds with a visible Ctrl+T affordance; /settings shows a readable label for a stored preset that was deleted.
3. Boundary: contribute a 2-row status entry and open a lane — the subagent panel title must remain visible; squeeze the terminal very short and confirm the panel does not spill past the editor slot.
4. Nearby regression: zh/en switch, /help, /plugin, and the todo/queue panes unchanged.

Notes

• No packages/ui wire-contract change; check:lib confirms.
• #60 (locale registration) is handled separately by fix(locale): share one namespace registration across plugins #78; this PR does not touch it.