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/i18n/locales/en/lanes.json

@@ -427,6 +427,7 @@
   "tree.state.idle": "ended",
   "tree.showMore_one": "Show {{count}} more",
   "tree.showMore_other": "Show {{count}} more",
+  "tree.seeAll": "See all ({{count}} more)",
   "home.contextPanel": "Workspace context",
   "row.state.needsYou": "needs you",
   "row.state.error": "error",

client/src/i18n/locales/en/sessions.json

@@ -56,6 +56,7 @@
   },
   "exportCsv": "CSV",
   "exportJson": "JSON",
+  "exportCapped": "The file holds {{shown}} of {{total}} sessions (the export limit) — narrow the filters to export the rest.",
   "filterDirectory": "Filter by directory",
   "allDirectories": "All directories",
   "sortLabel": "Sort sessions",

client/src/i18n/locales/vi/lanes.json

@@ -427,6 +427,7 @@
   "tree.state.idle": "đã kết thúc",
   "tree.showMore_one": "Hiện thêm {{count}}",
   "tree.showMore_other": "Hiện thêm {{count}}",
+  "tree.seeAll": "Xem tất cả (thêm {{count}})",
   "home.contextPanel": "Ngữ cảnh workspace",
   "row.state.needsYou": "cần bạn",
   "row.state.error": "lỗi",

client/src/i18n/locales/vi/sessions.json

@@ -55,6 +55,7 @@
   },
   "exportCsv": "CSV",
   "exportJson": "JSON",
+  "exportCapped": "Tệp chỉ gồm {{shown}} trên {{total}} phiên (giới hạn xuất) — hãy thu hẹp bộ lọc để xuất phần còn lại.",
   "filterDirectory": "Lọc theo thư mục",
   "allDirectories": "Tất cả thư mục",
   "sortLabel": "Sắp xếp phiên",