[Init] Initial commit - NetMesh terminal manager

application/app/AppHostEditorSurface.tsx

@@ -0,0 +1,51 @@
+import { useMemo } from 'react';
+
+import type { EditorTabChrome } from '../state/editorTabStore';
+import type { LogView } from '../state/logViewState';
+import type { TerminalSession, Workspace } from '../../types';
+import { useActiveTabId } from '../state/activeTabStore';
+import { isHostTreeWorkTabSurface } from './workTabSurface';
+
+/**
+ * Subscribes to activeTabId and exposes work-surface visibility without
+ * forcing the AppView shell to re-render on every top-tab switch.
+ */
+export function useWorkSurfaceVisible({
+  enabled,
+  sessions,
+  workspaces,
+  logViews,
+  orderedTabs,
+}: {
+  enabled: boolean;
+  sessions: TerminalSession[];
+  workspaces: Workspace[];
+  logViews: readonly LogView[];
+  orderedTabs: readonly string[];
+}): boolean {
+  const activeTabId = useActiveTabId();
+  const sessionIds = useMemo(
+    () => new Set(sessions.map((session) => session.id)),
+    [sessions],
+  );
+  const workspaceIds = useMemo(
+    () => new Set(workspaces.map((workspace) => workspace.id)),
+    [workspaces],
+  );
+  const logViewIds = useMemo(
+    () => new Set(logViews.map((logView) => logView.id)),
+    [logViews],
+  );
+
+  return useMemo(() => isHostTreeWorkTabSurface({
+    enabled,
+    activeTabId,
+    logViewIds,
+    orderedTabs,
+    sessionIds,
+    workspaceIds,
+  }), [activeTabId, enabled, logViewIds, orderedTabs, sessionIds, workspaceIds]);
+}
+
+/** Tiny marker export so tests can pin the isolation helper module. */
+export type WorkSurfaceEditorTabChrome = EditorTabChrome;