feat: v2.7.8 — Artifacts hub, clone related repos as extra folders, quieter resume prompt

- Artifacts (/artifacts): claude.ai pages sessions publish (captured from the
  Artifact tool's hook), pinned workspace files, skills and plugins, each
  kept as a snapshot; shared ones appear in a Hub and a skill or plugin
  installs into the viewer's own account (server/lib/artifacts.js,
  /api/artifacts, docs/plans/artifacts/).
- Workspace extra folders: clone one or more related repos beside the
  workspace and add them in one step (POST /api/lanes/:id/sources/clone).
- A pane that ended by itself while tmux kept running is no longer offered
  for resume (tmux.serverStartedAt in reconcileOrphans).
- Changes panel: a folder that is not a git repo opens on Files, and its
  files open from there.
- Plus the parallel sessions' work in this tree: File Explorer button in the
  panel header, user delete, RSA SSH keys, chat/terminal and pet fixes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

client/src/components/settings/__tests__/GitIdentitySettings.test.tsx

@@ -50,7 +50,7 @@ describe("GitIdentitySettings", () => {
     render(<GitIdentitySettings />);
     await userEvent.click(await screen.findByRole("button", { name: "Generate SSH key" }));
     expect(confirmDialog).not.toHaveBeenCalled();
-    expect(api.gitIdentity.generateKey).toHaveBeenCalledWith(false);
+    expect(api.gitIdentity.generateKey).toHaveBeenCalledWith(false, "ed25519");
     expect(await screen.findByLabelText("Public key")).toHaveValue(KEY.publicKey);
   });
 
@@ -62,7 +62,7 @@ describe("GitIdentitySettings", () => {
     expect(copyText).toHaveBeenCalledWith(KEY.publicKey);
     await userEvent.click(screen.getByRole("button", { name: "Replace key" }));
     expect(confirmDialog).toHaveBeenCalled();
-    await waitFor(() => expect(api.gitIdentity.generateKey).toHaveBeenCalledWith(true));
+    await waitFor(() => expect(api.gitIdentity.generateKey).toHaveBeenCalledWith(true, "ed25519"));
   });
 
   it("lets a member save an https login of their own", async () => {
@@ -85,6 +85,18 @@ describe("GitIdentitySettings", () => {
     expect(await screen.findByText("github.com")).toBeInTheDocument();
   });
 
+  it("makes an RSA key when that type is picked (AWS CodeCommit takes only RSA)", async () => {
+    vi.mocked(api.gitIdentity.get).mockResolvedValue(view());
+    vi.mocked(api.gitIdentity.generateKey).mockResolvedValue(
+      view({ ssh: { ...KEY, type: "rsa", publicKey: "ssh-rsa AAAAB3 an@agenthub" } })
+    );
+    render(<GitIdentitySettings />);
+    await userEvent.selectOptions(await screen.findByLabelText("Key type"), "rsa");
+    await userEvent.click(screen.getByRole("button", { name: "Generate SSH key" }));
+    expect(api.gitIdentity.generateKey).toHaveBeenCalledWith(false, "rsa");
+    expect(await screen.findByText(/^RSA 4096 · /)).toBeInTheDocument();
+  });
+
   it("warns while the commit author is unset and saves it", async () => {
     vi.mocked(api.gitIdentity.get).mockResolvedValue(view({ author: { name: null, email: null } }));
     vi.mocked(api.gitIdentity.saveAuthor).mockResolvedValue(view());