UI.9: share docking transactions and preserve viewer lifecycle

Preserve legacy selection repair, modifier routing, viewer lifecycle and workspace persistence through the shared docking integration. Qualify the complete workspace gate by refreshing the 18 stale Audio Spectrum hashes for the existing linear renderer, with an independent synthetic-tone regression.

apps/effectcraft-cli/tests/cli.rs

@@ -259,6 +259,9 @@ fn render_out_is_relative_to_the_working_directory() {
     let (proj, elsewhere) = (root.join("proj"), root.join("elsewhere"));
     std::fs::create_dir_all(&proj).unwrap();
     std::fs::create_dir_all(&elsewhere).unwrap();
+    // current_dir resolves aliases such as macOS /var -> /private/var.
+    let root = root.canonicalize().unwrap();
+    let (proj, elsewhere) = (root.join("proj"), root.join("elsewhere"));
     let project = proj.join("x.ecproj");
     let p = project.to_str().unwrap();
     ok_json(&[