fix: restore workspace verification

src/app/update/command.rs

@@ -111,6 +111,7 @@ pub(super) fn on_tab_close(&mut self, idx: usize) -> Task<Message> {
                     self.pending_close = Some(crate::app::PendingClose::Tab(idx));
                     return self.open_unsaved_dialog_window();
                 }
+                #[cfg(not(target_arch = "wasm32"))]
                 let tab_id = self.tabs.get(idx).map(|t| t.id);
                 // This tab is closing for good — drop its autosave recovery copy.
                 #[cfg(not(target_arch = "wasm32"))]
@@ -135,8 +136,8 @@ pub(super) fn on_tab_close(&mut self, idx: usize) -> Task<Message> {
                 self.sync_ribbon_layers();
                 self.sync_ribbon_styles();
                 self.sync_ribbon_from_selection();
+                #[cfg(not(target_arch = "wasm32"))]
                 if let Some(tab_id) = tab_id {
-                    #[cfg(not(target_arch = "wasm32"))]
                     v4_support::on_tab_closed(tab_id);
                 }
                 Task::none()

src/app/update/file.rs

@@ -4202,15 +4202,16 @@ pub(super) fn on_open_file(&mut self) -> Task<Message> {
                     .unwrap_or("export.ctb".into());
                 Task::perform(
                     async move {
-                        let mut dialog = crate::sys::file_dialog()
+                        let dialog = crate::sys::file_dialog()
                             .set_title("Save Plot Style Table")
                             .set_file_name(&default_name)
                             .add_filter("Plot Style Files", &["ctb", "CTB"])
                             .add_filter("All Files", &["*"]);
                         #[cfg(not(target_arch = "wasm32"))]
-                        if let Ok(dir) = crate::io::plot_style::ensure_plot_styles_dir() {
-                            dialog = dialog.set_directory(dir);
-                        }
+                        let dialog = match crate::io::plot_style::ensure_plot_styles_dir() {
+                            Ok(dir) => dialog.set_directory(dir),
+                            Err(_) => dialog,
+                        };
                         dialog.save_file().await
                             .map(|h| crate::sys::handle_path(&h))
                     },

src/app/update/mod.rs

@@ -6635,16 +6635,17 @@ impl OpenCADStudio {
 
             Message::PlotStylePanelApply => self.on_plot_style_panel_apply(),
 
-            Message::PlotStylePanelSaveDirect => {
-            let Some(table) = self.active_plot_style.as_ref() else {
+        Message::PlotStylePanelSaveDirect => {
+            if self.active_plot_style.is_none() {
                 self.command_line.push_error(
                     crate::t!("No plot style table loaded. Load or create one first.").as_ref(),
                 );
                 return Task::none();
-            };
+            }
 
             #[cfg(not(target_arch = "wasm32"))]
             {
+                let table = self.active_plot_style.as_ref().expect("checked above");
                 let table_name = table.name.clone();
 
                 let result = crate::io::plot_style::ensure_plot_styles_dir().and_then(|dir| {