fix: event-loop freezes, plugin-install boot crash, tmux attach/scrollbar, Codex transcripts

- GET /api/workflows: one LEAD() window pass in a read worker (read-pool.js,
  workflow-stats.js); idx_events_session restored, idx_events_tool added
- compat-sqlite gains function/pluck/readonly so a plugin install without a
  better-sqlite3 build boots again; antigravity-usage uses db.js's Database
- install-hooks adds no checkout hooks while the agenthub plugin is enabled
  (events were doubled)
- terminal attach runs the live tmux server's own binary; the pane scrollbar
  gets a visible 2-column style, and claude panes start with
  CLAUDE_CODE_DISABLE_ALTERNATE_SCREEN=1 so tmux keeps history to scroll
- Codex sessions' conversation in GET /api/sessions/:id/transcript
- Codex/Antigravity sessions claimed by their workspace without hooks
- UI-audit follow-ups, docs and OpenAPI

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

@@ -10,6 +10,7 @@
 import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
 import { render, cleanup, act, fireEvent, screen, waitFor } from "@testing-library/react";
 import { TerminalView } from "../TerminalView";
+import { pasteToRun } from "../../../lib/panePaste";
 
 const writeMock = vi.fn();
 const onDataHandlers: Array<(d: string) => void> = [];
@@ -288,6 +289,24 @@ describe("TerminalView", () => {
     expect(screen.getByTestId("terminal-reconnecting")).toHaveTextContent("Reconnecting");
   });
 
+  it("takes no paste while its socket is not open, so the text is not dropped unseen", () => {
+    const width = vi.spyOn(HTMLElement.prototype, "offsetWidth", "get").mockReturnValue(800);
+    try {
+      render(<TerminalView runId="agenthub-lane-7" wsBaseUrl="ws://localhost:4820" />);
+      const ws = MockWebSocket.instances[0]!;
+      ws.readyState = 0; // CONNECTING
+      expect(pasteToRun("agenthub-lane-7", "hello")).toBe(false);
+      ws.readyState = 1;
+      act(() => ws.onopen?.());
+      expect(pasteToRun("agenthub-lane-7", "hello")).toBe(true);
+      ws.readyState = 3; // CLOSED: Reconnecting…
+      act(() => ws.onclose?.());
+      expect(pasteToRun("agenthub-lane-7", "hello")).toBe(false);
+    } finally {
+      width.mockRestore();
+    }
+  });
+
   it("takes the keyboard as soon as it mounts", () => {
     // The terminal IS the page here — without this the first thing typed after
     // opening a lane went nowhere until the user clicked the pane.