Printing tracking for owned copies and deck art, and an outdated-card-data notice

Owned copies can now be pinned to a printing + finish (nonfoil / foil /
etched), activating the long-dormant library_card_copies table as groups
of identical copies. library_cards.quantity_owned stays authoritative:
groups are a subset of it, and the rest are "unspecified". Tracking more
copies than are unspecified grows ownership to fit; lowering ownership
trims the most recently added groups first. Migration 0006 adds the
group quantity, a unique (card, printing, finish) index, and
deck_cards.preferred_scryfall_id.

A deck slot can show a chosen printing's art, both faces from that
printing, falling back to the default when the id no longer resolves.
It survives quantity/board changes and is kept by duplicate_deck.

UI: the click preview's info tile gets a Printings section when opened
from the Library or a deck (copy groups with steppers, "Add a
printing…", and "Shown in this deck" with Change…/Default), backed by a
printing picker grid. The picker takes Escape in the capture phase so
it closes without closing the preview under it.

Sync: CardEntry.printings (keyed "<scryfall_id>/<finish>") and
DeckCardEntry.printing. Cards now merge field by field with groups per
key, so a quantity edit and a printing added on another device both
survive; merged groups are clamped deterministically. A document is
written as version 2 only once it holds printing data, so older builds
and servers refuse it instead of dropping the data and syncing the loss.

Decklists: "(SET) NUM", optionally "*F*"/"*E*", round-trips through deck
and library export/import. Library export writes a line per group plus
one for unspecified copies.

reference.db printings gain lang and released_at for picker labels and
ordering. When the installed card data lacks any column this build's
reference schema has (found by diffing against the schema applied
in-memory, so no list to maintain), a notice under the top bar offers
Update card data (and Import card data… on phones); "Not now" is
remembered until something more goes missing.

src/styles.css

@@ -672,6 +672,27 @@ input[type="checkbox"] {
   border-bottom: 1px solid var(--border-soft);
   font-size: 13px;
 }
+/* Card data from an older version: same strip as the ingest bar, tinted as
+   a warning. Wraps its buttons under the message on narrow screens. */
+.outdated-bar {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 8px 16px;
+  padding: 8px 18px;
+  background: rgba(224, 163, 74, 0.12);
+  border-bottom: 1px solid rgba(224, 163, 74, 0.35);
+  font-size: 13px;
+}
+.outdated-bar-message {
+  flex: 1 1 260px;
+  color: var(--text);
+}
+.outdated-bar-actions {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+}
 .ingest-bar-head {
   display: flex;
   align-items: center;
@@ -3299,3 +3320,82 @@ tbody tr:hover {
     font-size: 22px;
   }
 }
+
+/* ============================================================
+   Printings: the click preview's per-printing controls, and the picker
+   ============================================================ */
+.printing-row {
+  display: flex;
+  align-items: center;
+  gap: var(--space-2);
+  min-width: 0;
+}
+.printing-row-thumb {
+  width: 28px;
+  height: 39px;
+  flex-shrink: 0;
+  object-fit: cover;
+  border-radius: 3px;
+  background: var(--bg-elev);
+}
+.printing-row-label {
+  min-width: 0;
+  font-size: 13px;
+  overflow-wrap: anywhere;
+}
+.printing-actions {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 6px;
+}
+.printing-actions button {
+  padding: 2px 10px;
+  font-size: 12px;
+}
+/* Above the click preview (450) it opens from. */
+.printing-picker-backdrop {
+  z-index: 500;
+}
+.printing-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(min(130px, 40vw), 1fr));
+  gap: var(--space-3);
+}
+.printing-option {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+  min-width: 0;
+}
+.printing-option-art {
+  display: block;
+  width: 100%;
+  padding: 0;
+  border: 2px solid transparent;
+  border-radius: var(--radius-card);
+  background: none;
+  cursor: pointer;
+}
+.printing-option-art:hover {
+  border-color: var(--accent-hover);
+  background: none;
+}
+.printing-option.selected .printing-option-art {
+  border-color: var(--accent);
+}
+.printing-option-art img {
+  display: block;
+  width: 100%;
+  aspect-ratio: 488 / 680;
+  object-fit: cover;
+  border-radius: calc(var(--radius-card) - 2px);
+}
+.printing-option-label {
+  font-size: 13px;
+  font-weight: 600;
+  color: var(--text-strong);
+}
+.printing-option-meta {
+  font-size: 12px;
+  color: var(--muted);
+}