feat: workspaces own their sessions; desktop parity; sidebar and settings cleanup

Workspace sessions (docs/plans/desktop-parity, phases 1-5 and 7):
- sessions.lane_id: a workspace lists only the sessions its panes held,
  stamped by bindRunSession (first writer wins, nested `claude -p`
  excluded); GET /api/sessions?lane=&archived=
- session row state dot, double-click rename, archive (sessions.archived_at,
  hides only); the activity bar's duplicate Sessions tab removed
- Fork beside Resume (--fork-session, Claude only), Ctrl/Cmd+click a live
  session opens it in a second pane, a diff line's comment is pasted into
  the workspace's last-focused pane (lib/panePaste.ts)

dashboard_runs stability:
- a pane's previous run is archived as <pane>@<started_at> instead of being
  overwritten by INSERT OR REPLACE
- a run is flagged abandoned only once its tmux session is gone, at boot and
  on the run-heal beat (panes outlive a server restart)

UI:
- sidebar: no footer, language or theme block; small collapse button in the
  brand corner; version + update check in the connection details modal, a
  status-bar dot while a release is out; language in Settings -> General
- one Switch component for every switch, the themed Checkbox for every
  checkbox (no native checkboxes)

Also: AI Tools catalog trimmed to 10 built-ins (custom-file prompt modes
tested through fixtures), and the workspace plans under docs/plans/ (the
multi-user server plan lives in the AgentHub-Server repo).

client/src/components/run/__tests__/LaneConsolePane.test.tsx

@@ -484,49 +484,6 @@ describe("LaneConsolePane", () => {
     });
   });
 
-  it("resumes a session handed over by the Sessions tab, once per request", async () => {
-    (api.lanes.action as ReturnType<typeof vi.fn>).mockResolvedValue({ run_id: "agenthub-lane-1" });
-    (api.run.get as ReturnType<typeof vi.fn>).mockResolvedValue({
-      id: "agenthub-lane-1",
-      laneId: 1,
-      status: "running",
-      cwd: "/workspace/a",
-      model: null,
-      permissionMode: null,
-      effort: null,
-      resumeSessionId: "s-1",
-      sessionId: null,
-      startedAt: null,
-      promptPreview: null,
-    });
-    const request = { sessionId: "s-1", model: "claude-opus-5-5", nonce: 1 };
-    const { rerender } = render(
-      <MemoryRouter>
-        <LaneConsolePane {...baseProps()} resumeRequest={request} />
-      </MemoryRouter>
-    );
-    await waitFor(() =>
-      expect(api.lanes.action).toHaveBeenCalledWith(
-        1,
-        "start",
-        expect.objectContaining({
-          slot: 0,
-          prompt: "",
-          resumeSessionId: "s-1",
-          model: "claude-opus-5-5",
-        })
-      )
-    );
-    // A re-render with the same request is not a second resume.
-    rerender(
-      <MemoryRouter>
-        <LaneConsolePane {...baseProps()} resumeRequest={{ ...request }} />
-      </MemoryRouter>
-    );
-    await screen.findByTestId("terminal-view");
-    expect(api.lanes.action).toHaveBeenCalledTimes(1);
-  });
-
   it("attaches to a run picked in the sidebar without starting or resuming anything", async () => {
     vi.mocked(api.run.get).mockResolvedValue({
       id: "agenthub-lane-1-2",