Fix blank window on first start (#81)

- default side panel to open
- update the document widget even with the side panel collapsed

crates/msvg/src/app.rs

@@ -26,11 +26,19 @@ enum LoadedDocument {
     // TODO: Document::from_svg() should return an proper error type
 }
 
-#[derive(Default, serde::Deserialize, serde::Serialize)]
+#[derive(serde::Deserialize, serde::Serialize)]
 struct AppState {
     side_panel_open: bool,
 }
 
+impl Default for AppState {
+    fn default() -> Self {
+        Self {
+            side_panel_open: true,
+        }
+    }
+}
+
 #[derive(Default)]
 struct FileNameOverlay {
     should_show: bool,
@@ -283,15 +291,6 @@ impl ViewerApp for App {
                     self.scroll_to_selected_row = false;
                 }
             }
-
-            if self.document_dirty {
-                if let Some(LoadedDocument::Loaded(document)) =
-                    self.loaded_documents.get(&self.paths[self.active_document])
-                {
-                    document_widget.set_document(document.clone());
-                    self.document_dirty = false;
-                }
-            }
         };
 
         // --- Side panel structure ---
@@ -328,6 +327,17 @@ impl ViewerApp for App {
                 });
             });
 
+        // --- Update the document widget if needed ---
+
+        if self.document_dirty {
+            if let Some(LoadedDocument::Loaded(document)) =
+                self.loaded_documents.get(&self.paths[self.active_document])
+            {
+                document_widget.set_document(document.clone());
+                self.document_dirty = false;
+            }
+        }
+
         Ok(())
     }