feat: bootstrap ShaCraft cross-platform launcher

src-tauri/src/lib.rs

@@ -0,0 +1,33 @@
+use serde::Serialize;
+use tauri::{AppHandle, Manager};
+
+#[derive(Serialize)]
+#[serde(rename_all = "camelCase")]
+struct NativeHost {
+    platform: &'static str,
+    data_dir: String,
+    launcher_version: &'static str,
+}
+
+/// Returns non-sensitive environment information needed by the interface.
+/// File access and child-process launching are deliberately not exposed yet.
+#[tauri::command]
+fn native_host(app: AppHandle) -> Result<NativeHost, String> {
+    let data_dir = app
+        .path()
+        .app_data_dir()
+        .map_err(|error| format!("Cannot resolve launcher data directory: {error}"))?;
+
+    Ok(NativeHost {
+        platform: std::env::consts::OS,
+        data_dir: data_dir.display().to_string(),
+        launcher_version: env!("CARGO_PKG_VERSION"),
+    })
+}
+
+pub fn run() {
+    tauri::Builder::default()
+        .invoke_handler(tauri::generate_handler![native_host])
+        .run(tauri::generate_context!())
+        .expect("error while running ShaCraft Launcher");
+}

src-tauri/src/main.rs

@@ -0,0 +1,5 @@
+#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
+
+fn main() {
+    shacraft_launcher_lib::run()
+}