feat: analytics parity — tool cost, date ranges, budgets, query explorer, replay, snapshots (v2.4.0)

Analytics parity phases 2–7 (docs/plans/analytics-parity/), built on
138e706 and ported onto v2.3.1:
- Cost by AI tool (?tool= on cost/analytics/stats/workflows, by_tool,
  Codex fast/priority and flex tiers, agenthub_cost_usd_total{tool,model})
- Date ranges (from/to) on cost/analytics/workflows; Analytics range select
  with Today / This week (Monday) / This month (1st) / 7d / 30d / 90d / All /
  Custom; workflow filters carried into workflow-stats.js (read worker)
- Budgets and cost alerts as alert rule types (alert_rules rebuilt without
  its rule_type CHECK), GET /api/budgets/status, rule preview, spend pace,
  status-bar budget chip; rules stay editable in place
- Query Explorer (/query, allowlisted sort, CSV/JSON export) and scheduled
  reports (report_definitions/report_runs, Settings → Reports)
- Session Replay tab and immutable snapshots (session_snapshots, /snapshot/:token)
- Remote Codex sync, push ingest with a hashed token, privacy redaction and
  ignored folders (Settings → Data), Cursor sessions (no cost)
- Read-only MCP server, statusline, Grafana/Prometheus files

Also: resizable sidebar, pet run/wave animations, the workspace home keeps a
half-typed prompt, and the pre-commit hook runs only the related tests for a
small commit.

client/src/pages/Settings.tsx

@@ -1,6 +1,6 @@
 /**
  * @file Settings.tsx
- * @description The install-wide settings, as three pages of the Settings nav (`SettingsHub.tsx`): `section="data"` — total cost, database overview, workspace housekeeping (dry run first, confirm before a real run), import, remote sources, export, this browser's preferences backup, session cleanup (whole days ≥ 1, a dry-run count in its confirm) and the danger zone (typed confirmation) —, `section="about"` — system information — and `section="notifications"` — browser notifications (per-browser, with a reset) and alerts (server-wide). Server info (`/api/settings/info`) is read only by Data and About, refreshed on activity at most every 10 s. Language, theme and the pet live on the Appearance page (`components/settings/AppearanceSettings.tsx`); per-tool settings live in that tool's page under `/settings/agents/<id>`.
+ * @description The install-wide settings, as three pages of the Settings nav (`SettingsHub.tsx`): `section="data"` — total cost, database overview, workspace housekeeping (dry run first, confirm before a real run), import, remote sources, push ingest (`components/settings/PushIngestSettings.tsx`), privacy (`components/settings/PrivacySettings.tsx`), export, this browser's preferences backup, session cleanup (whole days ≥ 1, a dry-run count in its confirm) and the danger zone (typed confirmation) —, `section="about"` — system information — and `section="notifications"` — browser notifications (per-browser, with a reset) and alerts (server-wide). Server info (`/api/settings/info`) is read only by Data and About, refreshed on activity at most every 10 s. Language, theme and the pet live on the Appearance page (`components/settings/AppearanceSettings.tsx`); per-tool settings live in that tool's page under `/settings/agents/<id>`.
  * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
  */
 /* =============================================================================
@@ -105,6 +105,8 @@ import { notify, playSound } from "../lib/notify";
 import { Tip } from "../components/Tip";
 import { ImportHistory } from "../components/ImportHistory";
 import { RemoteSources } from "../components/RemoteSources";
+import { PushIngestSettings } from "../components/settings/PushIngestSettings";
+import { PrivacySettings } from "../components/settings/PrivacySettings";
 import { Skeleton } from "../components/Skeleton";
 import { AlertsNotifications } from "../components/AlertsNotifications";
 import {
@@ -962,6 +964,10 @@ export function Settings({
             <RemoteSources />
           </section>
 
+          {/* ─── PUSH INGEST + PRIVACY (each its own anchored card) ─── */}
+          <PushIngestSettings />
+          <PrivacySettings />
+
           {/* ─── SESSION CLEANUP ─── */}
           <section id="cleanup" className="card p-5 space-y-4 scroll-mt-24">
             <div className="flex items-center gap-3">