feat(b3-2): bulk-price editing UI — inline cell + bulk-edit sheet

Lands the UI half of the bulk-price feature (backend already shipped).
Reps with berths.update_prices can retune pricing without unlocking the
rest of the berth schema, both one-at-a-time and in bulk.

- berth-columns: PriceCell wraps InlineEditableField, gated by
  can('berths', 'update_prices'). Click → input → save through
  PATCH /api/v1/berths/[id]/price. stopPropagation so row click
  doesn't navigate while editing.
- bulk-price-edit-sheet: right-side Sheet listing selected berths from
  the React Query cache. Per-row price + currency inputs with dirty-
  highlight. "Set all to" + "Adjust by %" shortcuts. Diff-only POST to
  /bulk-update-prices reports updated/unchanged/missing. Body is keyed
  on the selection so useState initializes fresh per open.
- berth-list: new "Update prices" bulk action gated by the same
  permission, sits between Remove tag and Archive.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/superpowers/audits/alpha-uat-master.md

@@ -41,7 +41,7 @@
 > - Reports P3-P7 (~31 h): BullMQ render+email queues + landing + builder + sub-pages + CSV/PNG outputs + metadata overrides.
 > - Tenancies P2-P7 (~36 h): rename migration + perms seed + webhook auto-create + public-map flip rules + sidebar entry + top-level page + entity tab CTAs + 4 reporting widgets.
 > - UploadForSigningDialog field metadata (full bundle, ~6-9 h): PlacedField.defaultValue + fieldMeta with per-type panel inputs + Documenso v2 `field/create-many` payload extension.
-> - B3 Wave (~50 h): interest dimensions dual-source, universal file preview Tier 1+2, bulk-price editing UI, web analytics integration, universal upload-with-fields remaining UI sites, 5 remaining PDF resolvers, recharts→ECharts migration.
+> - B3 Wave remaining: bulk-price editing UI (~2-3 h — backend already shipped); Umami Phase 4a (marketing-site instrumentation, separate repo) + Phase 3/5 (events tab + funnels, blocked on 4a). _Shipped this session: B3-1 (interest dimensions dual-source). Shipped earlier in week: universal file preview Tier 1+2, all 16 PDF resolvers (incl. the 5 previously-tracked "remaining"), universal upload-with-fields backend + most UI sites._ Recharts→ECharts migration removed (rejected).\_
 > - B4 bugs: Global-search dropdown translucent still wants live-browser repro to confirm the defensive fix actually addressed the cause.
 
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