Add a Card Search tab and fix horizontal-card (Battle/Plane) preview orientation

Card Search browses the whole downloaded card universe (not just owned
cards), reusing the Library tab's filter/group/sort/list/tiles UI; results
show ownership and offer quick "own" and "add to deck" actions.

Battles, Planes, and Phenomena store their Scryfall image portrait-shaped
with the content itself rotated, so hover/click previews now detect this
(a new `horizontal` flag threaded through ingest and every card query, with
graceful fallback for a reference.db built before the column existed) and
rotate the image back into place. Single-faced and non-DFC cases are
verified fixed; a double-faced Battle's front face still needs another pass.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

crates/mtgc-core/src/synergy.rs

@@ -311,7 +311,7 @@ impl Catalog {
         let mut sql = format!(
             "SELECT oc.oracle_id, oc.name, oc.mana_value, oc.colors, oc.color_identity, oc.type_line,
                     {image}, {back}, oc.produced_mana, oc.produces_colorless, oc.legalities, {price},
-                    oc.themes, oc.edhrec_rank, COALESCE(lc.quantity_owned, 0)
+                    oc.themes, oc.edhrec_rank, COALESCE(lc.quantity_owned, 0), {horizontal}
              FROM {REF_DB}.oracle_cards oc
              LEFT JOIN library_cards lc ON lc.oracle_id = oc.oracle_id
              WHERE oc.oracle_id NOT IN (SELECT oracle_id FROM deck_cards WHERE deck_id = ?)
@@ -320,6 +320,7 @@ impl Catalog {
             image = crate::db::image_subquery("image_uri"),
             back = crate::db::image_subquery("back_image_uri"),
             price = crate::db::price_subquery(),
+            horizontal = self.horizontal_col(),
         );
         let mut vals: Vec<Value> = vec![
             Value::Integer(deck_id),
@@ -372,6 +373,7 @@ impl Catalog {
                         produces_colorless: r.get::<_, i64>(9)? != 0,
                         legalities: Legalities(r.get::<_, i64>(10)?),
                         price_usd: r.get::<_, Option<f64>>(11)?.unwrap_or_default(),
+                        horizontal: r.get::<_, i64>(15)? != 0,
                     },
                     themes: r.get(12)?,
                     edhrec_rank: r.get(13)?,