feat: v2.8.0 — Artifacts uploads and plugin links, console tab combos, account avatars

- Artifacts hub: upload a file from the computer; make a skill by uploading a
  Markdown file, files, a folder or a .zip/.skill, or by writing it in the
  dialog; add plugins by picking from the list a marketplace link answers
  (POST /api/artifacts/plugin/inspect); Settings → AI tools → Artifacts Hub.
- Console tabs are combos of up to four split panes (ConsoleTabs, PaneGrid).
- Accounts: an own avatar (PUT/DELETE /api/me/avatar, raster only, ≤ 1 MB,
  <data dir>/avatars/), shown with name and role at the sidebar's foot and on
  the workspace owner groups (GET /api/users/:id/avatar, owner_avatar_at).
- Users page: per-user storage (GET /api/users/storage, measured in a worker)
  and account-pool spend/tokens per account (server/lib/pool-usage.js).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

client/src/components/users/AccountPoolCard.tsx

@@ -2,7 +2,7 @@
  * @file AccountPoolCard.tsx
  * @description The Users page's account pool card (`GET /api/accounts`): the
  * Claude and Codex accounts every user's new sessions are spread over, each
- * with its live panes, $ in the last 5 h / 7 d and quota — so nobody signs in
+ * with its live panes, $ and tokens in the last 5 h / 7 d and quota — so nobody signs in
  * per user. An admin adds one — for Claude a login MOVED in from a saved
  * switch-user profile (`GET /api/accounts/profiles`), a pasted
  * `.credentials.json`, or a `claude setup-token` token; for Codex an OpenAI
@@ -23,7 +23,7 @@ import {
   type PoolProfile,
   type PoolTool,
 } from "../../lib/api";
-import { fmtCost, formatDateTime } from "../../lib/format";
+import { fmt, fmtCost, formatDateTime } from "../../lib/format";
 import { toast } from "../../lib/toast";
 import { isSubmitEnter } from "../../lib/keys";
 import { useSpin } from "../../hooks/useSpin";
@@ -40,6 +40,8 @@ type Row = {
   livePanes: number;
   spend5h: number;
   spend7d: number;
+  tokens5h: number;
+  tokens7d: number;
   quotaPercent: number | null;
   full: boolean;
 };
@@ -175,9 +177,14 @@ export function AccountPoolCard({ isAdmin }: { isAdmin: boolean }) {
                     {r.quotaPercent == null ? "—" : `${Math.round(r.quotaPercent)}%`}
                   </td>
                   <td className="px-5 py-2.5 text-right tabular-nums">
-                    <div className="text-sm text-fg-primary">{fmtCost(r.spend5h)}</div>
+                    <div className="text-sm text-fg-primary">
+                      {fmtCost(r.spend5h)}
+                      <span className="ml-1.5 text-[11px] text-fg-muted">
+                        {t("pool.tokens", { tokens: fmt(r.tokens5h) })}
+                      </span>
+                    </div>
                     <div className="text-[11px] text-fg-muted">
-                      {t("pool.spend7d", { cost: fmtCost(r.spend7d) })}
+                      {t("pool.spend7d", { cost: fmtCost(r.spend7d), tokens: fmt(r.tokens7d) })}
                     </div>
                   </td>
                   {isAdmin && (