Initial commit: MTG personal library catalog (Tauri v2 + React/TS)

Full working app with:
- Rust core (mtgc-core): Scryfall ingester, nucleo fuzzy search, SQLite two-DB
  architecture (reference.db + library.db via ATTACH), criteria filters, deck ops
- Tauri v2 shell exposing the core as typed IPC commands
- React/TS frontend: card entry, library browser, deck editor
- Features: fuzzy card search, color/CMC/type/commander-identity filters,
  tile/list view toggle, hover card previews, deck format + commander support,
  per-card location field, grouping by type/subtype/CMC/color, localStorage
  persistence for active tab/deck/grouping, Discord-inspired dark UI (#C8553D accent)

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

src-tauri/src/lib.rs

@@ -0,0 +1,43 @@
+mod commands;
+mod state;
+
+use std::sync::Mutex;
+
+use tauri::Manager;
+
+use state::AppState;
+
+#[cfg_attr(mobile, tauri::mobile_entry_point)]
+pub fn run() {
+    tauri::Builder::default()
+        .plugin(tauri_plugin_dialog::init())
+        .setup(|app| {
+            let data_dir = app
+                .path()
+                .app_data_dir()
+                .expect("resolve app data dir");
+            std::fs::create_dir_all(&data_dir).ok();
+            app.manage(Mutex::new(AppState::new(data_dir)));
+            Ok(())
+        })
+        .invoke_handler(tauri::generate_handler![
+            commands::get_status,
+            commands::set_library_path,
+            commands::update_card_data,
+            commands::search_cards,
+            commands::add_owned,
+            commands::set_owned,
+            commands::set_location,
+            commands::search_library,
+            commands::list_decks,
+            commands::create_deck,
+            commands::delete_deck,
+            commands::set_deck_format,
+            commands::set_deck_commander,
+            commands::set_deck_card,
+            commands::deck_contents,
+            commands::card_decks,
+        ])
+        .run(tauri::generate_context!())
+        .expect("error while running tauri application");
+}