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.

server/lib/codex-ingest.js

@@ -34,8 +34,11 @@ const CODEX_ACTIVE_MS = 120_000; // a journal written within 2 min means the age
 const MAX_FILES = 40; // newest-first cap so a years-deep sessions/ tree can't stall a pass
 const MAX_DEPTH = 4; // sessions/<YYYY>/<MM>/<DD>/<file>
 
-/** Every rollout journal under sessions/ ({path, mtime, size}), unsorted. */
-function allRolloutFiles() {
+/**
+ * Every rollout journal under `<home>/sessions/` ({path, mtime, size}),
+ * unsorted. `home` is CODEX_HOME unless a remote source's mirror names its own.
+ */
+function allRolloutFiles(home = getCodexHome()) {
   const out = [];
   const walk = (dir, depth) => {
     let entries = [];
@@ -58,7 +61,7 @@ function allRolloutFiles() {
       }
     }
   };
-  walk(path.join(getCodexHome(), "sessions"), 0);
+  walk(path.join(home, "sessions"), 0);
   return out;
 }