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/TerminalView.tsx

@@ -108,6 +108,8 @@ export function TerminalView({ runId, wsBaseUrl, onExit, autoFocus = true }: Ter
   const paletteRef = useRef(palette);
   paletteRef.current = palette;
   const termRef = useRef<Terminal | null>(null);
+  // The current attach: a paste into a socket that is not open would be dropped.
+  const wsRef = useRef<WebSocket | null>(null);
   const { t } = useTranslation("run");
   const tRef = useRef(t);
   tRef.current = t;
@@ -319,6 +321,7 @@ export function TerminalView({ runId, wsBaseUrl, onExit, autoFocus = true }: Ter
       const size = term.cols > 1 && term.rows > 1 ? `?cols=${term.cols}&rows=${term.rows}` : "";
       const sock = new WebSocket(`${wsBaseUrl}/ws-pty/${encodeURIComponent(runId)}${size}`);
       ws = sock;
+      wsRef.current = sock;
       // Server sends PTY bytes as binary frames — default binaryType ("blob")
       // would hand onmessage a Blob that the string checks below never match,
       // silently dropping all terminal output. "arraybuffer" keeps it sync.
@@ -432,8 +435,10 @@ export function TerminalView({ runId, wsBaseUrl, onExit, autoFocus = true }: Ter
           termRef.current?.paste(text);
           termRef.current?.focus();
         },
-        // On screen: a console hidden with CSS measures 0×0.
-        () => !!containerRef.current?.offsetWidth
+        // On screen (a console hidden with CSS measures 0×0) AND attached:
+        // `onData` drops input while the socket is connecting or reconnecting,
+        // so a caller waits or says the paste failed instead.
+        () => !!containerRef.current?.offsetWidth && wsRef.current?.readyState === WebSocket.OPEN
       ),
     [runId]
   );

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.