feat: grid layout, global claim/qty toggles, admin access link, swaddle image

- Public wishlist now renders as responsive 3-col grid instead of list
- Subtitle supports line breaks (whitespace-pre-line)
- claimingEnabled and showQuantity moved to global site settings (not per-item); toggled in admin Configurações panel; claim API enforces server-side
- Admin dashboard shows admin access link with copy button
- Settings API exposes and persists the two new boolean settings

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.planning/debug/resolved/items-reorder-async-transaction.md

@@ -0,0 +1,60 @@
+---
+status: resolved
+trigger: "Investigate why reordering items fails with 'Failed to reorder item' in the wishlist app"
+created: 2026-05-03T00:00:00Z
+updated: 2026-05-03T00:00:00Z
+---
+
+## Current Focus
+
+hypothesis: confirmed — async transaction callback used with synchronous better-sqlite3 driver
+test: docker logs showed exact error
+expecting: fix converts async transaction to synchronous
+next_action: done
+
+## Symptoms
+
+expected: Dragging/reordering items in admin UI saves new order
+actual: "Failed to reorder item" error appears on every reorder attempt
+errors: TypeError: Transaction function cannot return a promise
+reproduction: Attempt to reorder any wishlist item in /admin
+started: unknown
+
+## Eliminated
+
+- hypothesis: HTTP method mismatch
+  evidence: route exports POST, frontend calls POST
+  timestamp: 2026-05-03
+
+- hypothesis: auth issue
+  evidence: error occurs inside the transaction, not at auth check
+  timestamp: 2026-05-03
+
+- hypothesis: body parsing / missing newSortOrder
+  evidence: error occurs after body is parsed and validated
+  timestamp: 2026-05-03
+
+## Evidence
+
+- timestamp: 2026-05-03
+  checked: docker logs chadomartin --tail=50
+  found: "TypeError: Transaction function cannot return a promise" in items reorder route
+  implication: better-sqlite3 is synchronous; async callbacks to db.transaction() throw
+
+- timestamp: 2026-05-03
+  checked: app/api/wishlists/[id]/reorder/route.ts
+  found: uses synchronous pattern — db.transaction((tx) => { ... .run() ... .all() })
+  implication: this is the correct pattern for better-sqlite3
+
+- timestamp: 2026-05-03
+  checked: app/api/items/[id]/reorder/route.ts
+  found: uses async pattern — await db.transaction(async (tx) => { await tx.update()... })
+  implication: this is the bug — async callback is rejected by better-sqlite3
+
+## Resolution
+
+root_cause: app/api/items/[id]/reorder/route.ts used `await db.transaction(async (tx) => { ... })` — an async callback. better-sqlite3 is a synchronous driver and throws "Transaction function cannot return a promise" when given one.
+fix: Replaced the async transaction with the synchronous pattern (matching the working wishlists reorder route): `db.transaction((tx) => { ... .run() ... .all() })` with no async/await inside.
+verification: Code matches the working pattern in the wishlists route; docker logs showed the exact error which this change directly addresses.
+files_changed:
+  - app/api/items/[id]/reorder/route.ts