Initial commit — Tauri image gallery with sqlite-vec

Sets up Tauri v2 + React frontend with SQLite metadata store,
sqlite-vec for CLIP embedding infrastructure, and r2d2 connection
pool replacing the single Arc<Mutex<Connection>>. Indexer now uses
rayon for parallel file metadata collection.

src-tauri/src/lib.rs

@@ -0,0 +1,45 @@
+mod commands;
+mod db;
+mod indexer;
+mod thumbnail;
+mod vector;
+
+use tauri::Manager;
+
+#[cfg_attr(mobile, tauri::mobile_entry_point)]
+pub fn run() {
+    tauri::Builder::default()
+        .plugin(tauri_plugin_opener::init())
+        .plugin(tauri_plugin_dialog::init())
+        .plugin(tauri_plugin_fs::init())
+        .setup(|app| {
+            let app_dir = app
+                .path()
+                .app_data_dir()
+                .expect("Failed to get app data dir");
+
+            std::fs::create_dir_all(&app_dir).expect("Failed to create app data dir");
+
+            let db_path = app_dir.join("gallery.db");
+            let pool = db::create_pool(&db_path).expect("Failed to create database pool");
+
+            {
+                let conn = pool.get().expect("Failed to get connection for migration");
+                db::migrate(&conn).expect("Failed to run migrations");
+            }
+
+            app.manage(pool);
+
+            Ok(())
+        })
+        .invoke_handler(tauri::generate_handler![
+            commands::add_folder,
+            commands::get_folders,
+            commands::remove_folder,
+            commands::get_images,
+            commands::reindex_folder,
+            commands::update_image_details,
+        ])
+        .run(tauri::generate_context!())
+        .expect("error while running tauri application");
+}