Fix V2/V3 messaging ABI-break

src/app/update/mod.rs

@@ -313,6 +313,28 @@ impl OpenCADStudio {
                     crate::plugin::external::with_manager(|mgr| {
                         mgr.drain_requests(&mut host, &mut |_| {});
                     });
+                    crate::plugin::external::with_manager(|mgr| {
+                        for line in mgr.drain_io() {
+                            // Skip internal runner/plugin/REPL trace noise when
+                            // verbose logging is enabled; real plugin stdout/stderr
+                            // and non-trace runner errors still pass through.
+                            if line.text.starts_with("[runner]")
+                                || line.text.starts_with("[plugin] ")
+                                || line.text.starts_with("[python-repl]")
+                            {
+                                continue;
+                            }
+                            let prefixed = format!("[{} {}] {}", line.plugin_id, line.source, line.text);
+                            match line.source {
+                                ocs_plugin_api::process::IoStream::Stderr => {
+                                    self.command_line.push_error(&prefixed);
+                                }
+                                _ => {
+                                    self.command_line.push_output(&prefixed);
+                                }
+                            }
+                        }
+                    });
                 }
                 Task::none()
             }

src/plugin/registry.rs

@@ -62,7 +62,6 @@ pub(crate) fn try_dispatch(app: &mut OpenCADStudio, tab: usize, cmd: &str) -> bo
                 manager.dispatch(&mut host, cmd, |id| disabled.contains(id))
             })
         };
-
         for id in result.dead_plugins {
             app.push_plugin_error(&format!("Plugin '{id}' process died; skipping dispatch"));
         }

src/ui/window/plugin_manager.rs

@@ -218,8 +218,7 @@ fn external_card<'a>(
     disabled: bool,
     selected: bool,
 ) -> Element<'a, Message> {
-    let failed_old_api =
-        load_error.is_some() && p.api_version != ocs_plugin_api::API_VERSION;
+    let failed_old_api = load_error.is_some() && !p.api_compatible();
     let (status, kind) = if loaded && disabled {
         (t!("Disabled"), StatusKind::Muted)
     } else if loaded {
@@ -369,7 +368,9 @@ fn install_controls<'a>(
         .into()
     };
     let action = match selected_api {
-        Some(api_version) if api_version == ocs_plugin_api::API_VERSION => {
+        Some(api_version)
+            if ocs_plugin_api::manifest::host_accepts_plugin_version(api_version) =>
+        {
             pill_button(
                 t!("Install"),
                 Message::PluginInstall(repo_s.clone()),
@@ -845,7 +846,9 @@ pub fn view_window<'a>(
                     let compatible_tags = releases
                         .iter()
                         .filter(|release| {
-                            release.api_version == ocs_plugin_api::API_VERSION
+                            ocs_plugin_api::manifest::host_accepts_plugin_version(
+                                release.api_version,
+                            )
                         })
                         .map(|release| release.tag.clone())
                         .collect::<Vec<_>>();