fix(web): hide unsupported plugin manager

Fixes #567

src/app/update/file.rs

@@ -291,8 +291,11 @@ impl OpenCADStudio {
     }
 
     #[cfg(target_arch = "wasm32")]
-    pub(in crate::app) fn fetch_releases_task(&self, _repo: String) -> Task<Message> {
-        Task::none()
+    pub(in crate::app) fn fetch_releases_task(&self, repo: String) -> Task<Message> {
+        Task::done(Message::PluginReleasesFetched(
+            repo,
+            Err("External plugins are available in the desktop app.".to_string()),
+        ))
     }
 
     /// Background task: fetch a repository README from its default branch.
@@ -306,8 +309,11 @@ impl OpenCADStudio {
     }
 
     #[cfg(target_arch = "wasm32")]
-    pub(in crate::app) fn fetch_plugin_readme_task(&self, _repo: String) -> Task<Message> {
-        Task::none()
+    pub(in crate::app) fn fetch_plugin_readme_task(&self, repo: String) -> Task<Message> {
+        Task::done(Message::PluginReadmeFetched(
+            repo,
+            Err("Plugin details are available in the desktop app.".to_string()),
+        ))
     }
 
     /// Background task: download and install the `tag` release of `owner/repo`.
@@ -328,7 +334,9 @@ impl OpenCADStudio {
 
     #[cfg(target_arch = "wasm32")]
     pub(in crate::app) fn install_task(&self, _repo: String, _tag: String) -> Task<Message> {
-        Task::none()
+        Task::done(Message::PluginInstalled(Err(
+            "External plugins are available in the desktop app.".to_string(),
+        )))
     }
 
     /// Gather the full persisted config (all sections) from live app state.

src/app/update/mod.rs

@@ -4056,14 +4056,20 @@ impl OpenCADStudio {
 
             // ── Plugin Manager window ─────────────────────────────────────
             Message::PluginManagerOpen => {
-                // Refresh the on-disk external-plugin list each time the manager
-                // opens so newly dropped-in packages show up.
-                self.external_plugins = crate::plugin::external::discover();
-                self.marketplace_status.clear();
-                self.active_modal = Some(super::ModalKind::PluginManager);
-                // Fetch the curated registry and release lists for linked repos.
+                #[cfg(target_arch = "wasm32")]
+                {
+                    self.command_line
+                        .push_info("External plugins are available in the desktop app.");
+                    return Task::none();
+                }
                 #[cfg(not(target_arch = "wasm32"))]
                 {
+                    // Refresh the on-disk external-plugin list each time the manager
+                    // opens so newly dropped-in packages show up.
+                    self.external_plugins = crate::plugin::external::discover();
+                    self.marketplace_status.clear();
+                    self.active_modal = Some(super::ModalKind::PluginManager);
+                    // Fetch the curated registry and release lists for linked repos.
                     self.plugin_registry_loading = true;
                     self.plugin_registry_error = None;
                     self.plugin_registry_error_details_open = false;
@@ -4100,8 +4106,6 @@ impl OpenCADStudio {
                     }
                     return Task::batch(tasks);
                 }
-                #[cfg(target_arch = "wasm32")]
-                Task::none()
             }
             Message::PluginManagerClose => {
                 self.close_active_modal();