Rework library sync around a JSON document; add card filters

Sync

The previous design put the merge inside SQL: timestamp-stamping triggers,
a tombstone table, per-device SQLite snapshots, a device id in the database,
and row merges written as correlated-subquery UPDATEs. All of that schema
was inherited by desktop, and the merge was very hard to verify.

Replace it with a single JSON document plus a three-way merge in plain Rust.
Storing the last-read remote document as the merge base makes "who changed
what" and "what was deleted" derivable, which removes the tombstone table,
the updated_at columns and all eight triggers. It also makes a single shared
file safe: if a publish is lost the remote is unchanged, so the next merge
re-detects the local edits and republishes rather than reading their absence
as a deletion. That removes the need for per-device files and for device
identity entirely. Schema impact drops to one column, decks.uuid.

Conflicts resolve to "theirs", which is required for convergence rather than
chosen for taste — preferring ours has each device re-asserting its own value
forever. Every such choice is reported to the user.

SQLite becomes invisible: the working copy lives in the app data dir and the
user only ever names a .json file. There is always a document, defaulting to
private storage, so edits are never stranded with nowhere to be saved.
Pointing at a file that doesn't exist yet moves the current library there;
pointing at one that does adopts it. A converter brings a pre-document
library.db across.

Android reaches the folder through the Storage Access Framework rather than
MANAGE_EXTERNAL_STORAGE, so no storage permission is declared at all.

Filters

Track card origin in reference.db: Universes Beyond, digital-only and
Un-set cards, plus numeric power/toughness. Each origin flag is derived as
"every printing", not "any printing" — ordinary cards get reprinted into
those sets, and Lightning Bolt appearing in Marvel Commander must not hide
it. Non-numeric power ("*", "1+*") stays NULL so it drops out of range
filters instead of being compared as zero.

Also wire up filters over data already present: price range, format legality
(restricted counts as legal) and "can be a commander". All of these degrade
silently against an older reference.db rather than failing every query.

The shared criteria live in one component used by both filter panels, as a
compact row of icon toggles.

Card Search gains the Library tab's bulk selection: checkboxes in both views,
select-all, and a bulk add-to-deck with a single undo for the whole batch.

src/views/LibraryBrowser.tsx

@@ -17,8 +17,11 @@ import {
   SortMode,
   TagInput,
   ViewToggle,
+  CardCriteriaFields,
+  applyCardCriteria,
   groupCards,
   sortCards,
+  useCardCriteria,
   usePersistedState,
   useViewMode,
 } from "../components";
@@ -54,6 +57,7 @@ export function LibraryBrowser({
   const [inDeck, setInDeck] = useState<number | "">("");
   const [location, setLocation] = useState("");
   const [oracleText, setOracleText] = useState("");
+  const [criteria, patchCriteria] = useCardCriteria("library-criteria");
   // Collapsed by default (relevant on narrow/mobile screens only — see
   // .filters-more's CSS, which is always expanded above that breakpoint
   // regardless of this).
@@ -123,6 +127,7 @@ export function LibraryBrowser({
       in_deck: inDeck === "" ? null : Number(inDeck),
       location: location.trim() || null,
       oracle_text: oracleText.trim() || null,
+      ...applyCardCriteria(criteria),
     };
     const t = setTimeout(() => {
       api.searchLibrary(filter).then(setRows).catch(() => setRows([]));
@@ -140,6 +145,7 @@ export function LibraryBrowser({
     inDeck,
     location,
     oracleText,
+    criteria,
     refreshKey,
   ]);
 
@@ -607,6 +613,7 @@ export function LibraryBrowser({
             placeholder="e.g. landfall"
           />
         </div>
+        <CardCriteriaFields value={criteria} onChange={patchCriteria} />
         </div>
         </div>
         <button