Printing tracking for owned copies and deck art, and an outdated-card-data notice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/views/LibraryBrowser.tsx

@@ -1,6 +1,14 @@
 import { open, save } from "@tauri-apps/plugin-dialog";
 import { useEffect, useRef, useState } from "react";
-import { api, Deck, LibraryCard, LibraryFacets, LibraryFilter, LibraryImportResult } from "../api";
+import {
+  api,
+  Deck,
+  LibraryCard,
+  LibraryFacets,
+  LibraryFilter,
+  LibraryImportResult,
+  PreviewContext,
+} from "../api";
 import {
   CardThumb,
   CardTile,
@@ -330,6 +338,9 @@ export function LibraryBrowser({
       </span>
     );
 
+  // Lets the click preview track which printings the copies are.
+  const preview: PreviewContext = { onChanged: () => setRefreshKey((k) => k + 1) };
+
   function libTable(cards: LibraryCard[]) {
     return (
       <table>
@@ -356,7 +367,7 @@ export function LibraryBrowser({
                 />
               </td>
               <td className="cell-thumb">
-                <CardThumb card={c} />
+                <CardThumb card={c} preview={preview} />
               </td>
               <td>
                 <ColorPips mask={c.color_identity} />
@@ -399,6 +410,7 @@ export function LibraryBrowser({
           <CardTile
             key={c.oracle_id}
             card={c}
+            preview={preview}
             selected={selected.has(c.oracle_id)}
             cornerLeft={
               <span className="tile-select">