fix(angular): remove template diagnostics warnings (#1011)

* fix(angular): remove template diagnostics warnings

* fix(angular): preserve template fallback behavior

libs/workspace/shell/feature/src/lib/workspace-context-panel/components/workspace-context-category-view.component.html

@@ -1,4 +1,4 @@
-@if ((items()?.length ?? 0) > 0) {
+@if (items().length > 0) {
     <div class="nav-list">
         @if (statusText()) {
             <div class="context-inline-status">