feat: add economy/maximum presets, tool-lab and subagent-cursor extensions

- new economy and maximum agent presets with three-role pipeline skill
- new packages/extensions/tool-lab (home-lab ComfyUI/Docling/Whishper tools)
- new packages/subagent/subagent-cursor provider
- openrouter balance UI with on-demand refresh
- session projection context-seed boundary fold
- regenerate docs catalogs; keep local searxng benchmark scripts

packages/client/ui-openrouter-usage/README.md

@@ -13,13 +13,21 @@ only once a step actually priced — no zero-cost group. An unknown-pricing step
 count surfaces in a tooltip so the figure's coverage stays visible. `CostDock`
 therefore owns no store, refresh chain, or event listener.
 
+The figure covers the session plus its subagent subtree, walked over the
+session list's `parentId`/`origin` rows; a subtree share names itself in the
+label. Each projection value describes only its own session's work — the host
+fold excludes a forked child's inherited prefix — so the walk sums rather than
+double counts. Ordinary forks are not delegated work and stay out of it.
+
 `BalanceBadge` is account-global, so it is not a session projection: the slot
 inject face carries a `snapshot()` callback that polls the host
 `ctx.remote.openRouterUsage.snapshot()` Remote on a 60s interval and drives
-local state. In the collapsed rail it renders only the balance marker; in the
-wide column a labeled pill. Unknown or absent figures render the empty
-placeholder. Both entries render nothing before real data exists, so an
-assembly without the OpenRouter gateway or key costs no layout.
+local state. Clicking the badge calls the `refresh()` callback instead, which
+makes the host fetch the account immediately; the badge marks itself
+`aria-busy` for the duration and ignores further clicks until it settles, and
+a failed refresh keeps the last-known figure. In the collapsed rail it renders
+only the balance marker; in the wide column a labeled pill. Unknown or absent
+figures render the empty placeholder.
 
 The `/client` exports are the plugin body (`apply`/`inject`), the
 `CostDock`/`BalanceBadge` components, and the injected face types.
@@ -42,5 +50,10 @@ account figure; neither is a new model-visible input.
   projection holds; figures for already-folded history reflect the pricing
   table at fold time (see `dsh-openrouter-usage`).
 - **Polled, not pushed** — `BalanceBadge` polls the host snapshot; there is
-  no `openRouterUsage` forwarded-event channel, so the figure updates on the
-  poll interval rather than instantly.
+  no `openRouterUsage` forwarded-event channel, so an account change the user
+  did not click for surfaces on the poll interval rather than instantly.
+- **A cold subagent contributes nothing** — the subtree walk reads the
+  descendants' projection values the client holds. A subagent session never
+  opened, and with no version-matching row in the host's cold projection
+  cache, carries no value and is indistinguishable from a zero-cost child, so
+  its spend is missing from the total rather than marked absent.