fix: return workspace manager to level one

frontend/src/shell/WorkspaceManager.test.tsx

@@ -83,14 +83,24 @@ test("uses a tall viewport area and keeps the workspace content scrollable", ()
   expect(screen.getByRole("main")).toHaveClass("overflow-y-auto");
 });
 
-test("offers an internal link back to the initial page", async () => {
+test("offers a button above the workspace list that returns to Level 1", async () => {
   const user = userEvent.setup();
   const onClose = vi.fn();
   renderManager(onClose);
 
-  await user.click(screen.getByRole("button", { name: "Back to main page" }));
+  await user.click(await screen.findByRole("button", { name: "PSD Clinical" }));
+  expect(await screen.findByRole("heading", { name: "Workspace-specific actions" })).toBeVisible();
 
-  expect(onClose).toHaveBeenCalledTimes(1);
+  const navigation = screen.getByRole("navigation", { name: "Workspaces" });
+  const backButton = within(navigation).getByRole("button", { name: "Back to main page" });
+  expect(backButton).toHaveClass("border-border", "bg-card", "w-full");
+  expect(backButton.compareDocumentPosition(within(navigation).getByText("Available workspaces"))
+    & Node.DOCUMENT_POSITION_FOLLOWING).toBeTruthy();
+  await user.click(backButton);
+
+  expect(onClose).not.toHaveBeenCalled();
+  expect(screen.getByTestId("workspace-overview")).toBeVisible();
+  expect(screen.queryByRole("heading", { name: "Workspace-specific actions" })).not.toBeInTheDocument();
 });
 
 test("level one explains the read-only Git sequence and the repository update button", async () => {

frontend/src/shell/WorkspaceManager.tsx

@@ -108,6 +108,12 @@ export function WorkspaceManager({ open, onClose }: { open: boolean; onClose: ()
     clearMessages();
   };
 
+  const showLevelOne = () => {
+    setSelectedId(undefined);
+    setSecretValues({});
+    clearMessages();
+  };
+
   async function updateRepository() {
     setBusyAction("repository");
     clearMessages();
@@ -218,15 +224,6 @@ export function WorkspaceManager({ open, onClose }: { open: boolean; onClose: ()
         className="h-[86vh] w-[94vw] max-h-[92vh] max-w-[94vw] grid-rows-[auto_minmax(0,1fr)] gap-0 overflow-hidden p-0 sm:w-[70vw] sm:max-w-[94vw]"
       >
         <DialogHeader className="border-b border-border/70 px-6 pb-4 pt-5 pr-12">
-          <Button
-            type="button"
-            size="sm"
-            variant="link"
-            className="w-fit px-0"
-            onClick={close}
-          >
-            <ArrowLeft />Back to main page
-          </Button>
           <DialogTitle>Workspace management</DialogTitle>
           <DialogDescription>
             Read, validate, and complete the runtime configuration of workspaces supplied by the installation repository.
@@ -238,6 +235,15 @@ export function WorkspaceManager({ open, onClose }: { open: boolean; onClose: ()
 
         <div className="grid min-h-0 grid-cols-[15rem_minmax(0,1fr)] overflow-hidden">
           <nav aria-label="Workspaces" className="flex min-h-0 flex-col border-r border-border/70 bg-muted/30 p-3">
+            <Button
+              type="button"
+              size="sm"
+              variant="outline"
+              className="mb-3 w-full justify-start"
+              onClick={showLevelOne}
+            >
+              <ArrowLeft />Back to main page
+            </Button>
             <p className="mb-2 px-2 text-xs font-semibold uppercase tracking-wide text-muted-foreground">Available workspaces</p>
             <div className="min-h-0 flex-1 overflow-y-auto">
               {workspacesQuery.isLoading && <p className="p-2 text-xs text-muted-foreground">Loading workspaces…</p>}