feat(plugins): support local JDBC plugin installation

Add a "local install" button that lets users install the JDBC plugin
from a local zip file when online download fails (e.g. draft release).

src-tauri/src/commands/plugins.rs

@@ -42,6 +42,17 @@ pub async fn install_jdbc_plugin(state: State<'_, Arc<AppState>>) -> Result<Jdbc
     jdbc_plugin_status_from_state(&state)
 }
 
+#[tauri::command]
+pub async fn install_jdbc_plugin_local(
+    state: State<'_, Arc<AppState>>,
+    path: String,
+) -> Result<JdbcPluginStatus, String> {
+    let bytes = std::fs::read(&path).map_err(|e| format!("Failed to read file: {e}"))?;
+    let plugin_dir = state.plugins.root_dir().join("jdbc");
+    install_jdbc_plugin_zip(&bytes, &plugin_dir)?;
+    jdbc_plugin_status_from_state(&state)
+}
+
 #[tauri::command]
 pub async fn uninstall_jdbc_plugin(state: State<'_, Arc<AppState>>) -> Result<JdbcPluginStatus, String> {
     let plugin_dir = state.plugins.root_dir().join("jdbc");

src-tauri/src/lib.rs

@@ -93,6 +93,7 @@ pub fn run() {
             commands::plugins::delete_jdbc_driver,
             commands::plugins::jdbc_plugin_status,
             commands::plugins::install_jdbc_plugin,
+            commands::plugins::install_jdbc_plugin_local,
             commands::plugins::uninstall_jdbc_plugin,
             commands::schema::list_databases,
             commands::schema::list_tables,