fix(project-view): offer Git and Find Usages in workspace members outside the workspace folder

The Project view's context menu counted a node as part of the project only inside the window's root, which in a workspace is the workspace folder. Members that live outside it ("../../repos/a") lost the Git submenu and Find Usages, although their repositories are discovered and their changes listed. Those entries now accept nodes inside the root or any workspace member; Mark Directory as stays limited to the root, whose project structure it edits, and Scratches stay outside.

Fixes #3111

src/features/project-tree/contextMenu.test.ts

@@ -301,6 +301,32 @@ it("offers workspace removal for every member root", () => {
   );
 });
 
+it("offers Git and Find Usages in workspace members outside the workspace folder", () => {
+  useProject.setState({
+    project: {
+      root: "/work/workspaces/demo",
+      name: "demo",
+      settings: {},
+      trusted: true,
+      isGit: false,
+      workspace: { version: 1, name: "demo", projects: ["/work/repos/a", "/work/repos/b"] },
+    },
+  });
+  setContext("vcsAvailable", true);
+  try {
+    for (const target of [node("/work/repos/a", true, true), node("/work/repos/a/src", true)])
+      expect(sub(contextMenuItems([target]), "Git")).toContain("Commit…");
+    expect(sub(contextMenuItems([node("/work/repos/a/x.py")]), "Git")).toContain("Annotate with Git Blame");
+    expect(labels(contextMenuItems([node("/work/repos/a/x.py")]))).toContain("Find Usages");
+    // Project structure is the workspace folder's: its roots can't name a folder outside it.
+    expect(labels(contextMenuItems([node("/work/repos/a/src", true)]))).not.toContain("Mark Directory as");
+    // Scratches stay outside.
+    expect(sub(contextMenuItems([node("/config/scratches/s.py")]), "Git")).toBeUndefined();
+  } finally {
+    clearContext("vcsAvailable");
+  }
+});
+
 it("does not offer removal on the attached primary", () => {
   useProject.setState({
     project: {

src/features/project-tree/contextMenu.ts

@@ -151,6 +151,9 @@ export function contextMenuItems(nodes: ProjectNode[]): MenuItem[] {
   const project = useProject.getState().project;
   // Scratches and other contributed roots live outside the project: no VCS, roots or LSP usages.
   const inProject = !!project && nodes.every((n) => isSameOrInside(n.path, project.root));
+  // Workspace members may live outside the workspace folder; they have VCS and usages too.
+  const memberRoots = project ? [project.root, ...(project.workspace?.projects ?? [])] : [];
+  const inWorkspace = nodes.every((n) => memberRoots.some((root) => isSameOrInside(n.path, root)));
   const items: MenuItem[] = [];
   const push = (...list: Entry[]) => list.forEach((i) => i && items.push(i));
 
@@ -228,7 +231,7 @@ export function contextMenuItems(nodes: ProjectNode[]): MenuItem[] {
       shortcut: keyLabel("project.open"),
       run: () => files.forEach((f) => void openFile(f.path)),
     },
-    inProject &&
+    inWorkspace &&
       singleFile && {
         id: "findUsages",
         label: "Find Usages",
@@ -338,7 +341,7 @@ export function contextMenuItems(nodes: ProjectNode[]): MenuItem[] {
   );
 
   // Git › (`vcsAvailable` also covers repositories nested below a non-Git project root)
-  if (inProject && (project?.isGit || getContext().vcsAvailable === true)) {
+  if (inWorkspace && (project?.isGit || getContext().vcsAvailable === true)) {
     const arg = vcsArg(nodes);
     const dirs = nodes.some((n) => n.dir);
     push(