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/pages/Dashboard.tsx

@@ -1583,15 +1583,30 @@ function AnalyticsTab() {
   );
 }
 
+// The workflow sections the health cards read; the server computes only these.
+const HEALTH_SECTIONS = [
+  "stats",
+  "toolFlow",
+  "effectiveness",
+  "modelDelegation",
+  "errorPropagation",
+  "concurrency",
+  "compaction",
+] as const satisfies readonly (keyof WorkflowData)[];
+type HealthWorkflow = Pick<WorkflowData, (typeof HEALTH_SECTIONS)[number]>;
+
 function SystemHealthTab() {
   const { t } = useTranslation("dashboard");
   const [info, setInfo] = useState<SystemInfo | null>(null);
-  const [workflow, setWorkflow] = useState<WorkflowData | null>(null);
+  const [workflow, setWorkflow] = useState<HealthWorkflow | null>(null);
 
   const [loadError, setLoadError] = useState<string | null>(null);
   const loadData = useCallback(async () => {
     try {
-      const [infoRes, workflowRes] = await Promise.all([api.settings.info(), api.workflows.get()]);
+      const [infoRes, workflowRes] = await Promise.all([
+        api.settings.info(),
+        api.workflows.get(undefined, HEALTH_SECTIONS),
+      ]);
       setInfo(infoRes as any);
       setWorkflow(workflowRes);
       setLoadError(null);