swarm-ui: builds are a card under the job graph on the jobs tab

The builds tab is gone from the nav; its card sits below the jobs card on
/jobs. The swarm-builder commit status now links to /jobs?run=<id>, and the old
/builds address redirects there with its query so links already on PRs still
open the build. Docs and the link test follow.

frontend/packages/swarm-ui/src/App.tsx

@@ -1,12 +1,12 @@
 // Root shell component — routing only. Each route's content is its own
 // page component under `./pages/`; this file just maps paths to them.
-import { Route, Router, Switch } from "wouter-preact";
+import { Redirect, Route, Router, Switch, useSearch } from "wouter-preact";
+import { jobsHref } from "./pages/builds/builds-types.js";
 import { Shell } from "./shell/Shell.js";
 import { useGuardedLocation } from "./shell/useGuardedLocation.js";
 import { AgentsPage } from "./pages/agents/AgentsPage.js";
 import { AgentTerminalPage } from "./pages/agents/AgentTerminalPage.js";
 import { AlertsPage } from "./pages/AlertsPage.js";
-import { BuildsPage } from "./pages/builds/BuildsPage.js";
 import { MessagesPage } from "./pages/messages/MessagesPage.js";
 import { NEW_FLOW_PATH } from "./pages/notifications/FlowDraft.js";
 import { FlowEditorPage } from "./pages/notifications/FlowEditorPage.js";
@@ -19,6 +19,13 @@ import { SchedulesPage } from "./pages/schedules/SchedulesPage.js";
 import { StartPage } from "./pages/StartPage.js";
 import { Panel } from "./ui/panel/Panel.js";
 
+// The builds page moved onto the jobs tab. Links made before that, such as the
+// Details link on a swarm-builder commit status, land here and go on to the
+// same build's card, query kept.
+function BuildsMoved() {
+  return <Redirect to={jobsHref(useSearch())} replace />;
+}
+
 function NotFound() {
   return (
     <Panel title="404" icon="🧭">
@@ -42,7 +49,7 @@ export function App() {
           />
           <Route path="/jobs" component={JobsPage} />
           <Route path="/schedules" component={SchedulesPage} />
-          <Route path="/builds" component={BuildsPage} />
+          <Route path="/builds" component={BuildsMoved} />
           <Route path="/messages" component={MessagesPage} />
           <Route path="/notifications" component={NotificationsPage} />
           <Route path={NEW_FLOW_PATH}>

frontend/packages/swarm-ui/src/pages/JobsPage.css

@@ -7,3 +7,10 @@
    per bundle call). */
 @import "@hive/shared/jobq-graph.css";
 @import "@hive/shared/jobq-rollup.css";
+
+/* The jobs tab: the job graph's card, then the builds card, one gap apart. */
+.ui-jobs-page {
+  display: flex;
+  flex-direction: column;
+  gap: 1em;
+}

frontend/packages/swarm-ui/src/pages/JobsPage.tsx

@@ -22,6 +22,7 @@ import { useState } from "preact/hooks";
 import { JobqGraph } from "@hive/shared/jobq-graph.js";
 import { JobqRollup } from "@hive/shared/jobq-rollup.js";
 import { Panel } from "../ui/panel/Panel.js";
+import { BuildsCard } from "./builds/BuildsPage.js";
 import {
   RefreshIntervalPicker,
   useRefreshInterval,
@@ -34,7 +35,7 @@ import "./JobsPage.css";
 // just solve staleness rather than require an opt-in every visit.
 const DEFAULT_INTERVAL_MS: RefreshIntervalMs = 30_000;
 
-export function JobsPage() {
+function JobsCard() {
   const [intervalMs, setIntervalMs] =
     useState<RefreshIntervalMs>(DEFAULT_INTERVAL_MS);
   const [refreshToken, setRefreshToken] = useState(0);
@@ -66,3 +67,14 @@ export function JobsPage() {
     </Panel>
   );
 }
+
+// The jobs tab holds two cards: the controller's job graph, and the swarm
+// builder's recent builds under it.
+export function JobsPage() {
+  return (
+    <div class="ui-jobs-page">
+      <JobsCard />
+      <BuildsCard />
+    </div>
+  );
+}

frontend/packages/swarm-ui/src/pages/builds/BuildsPage.tsx

@@ -1,8 +1,10 @@
-// <BuildsPage> — the swarm builder's recent builds, newest first: which agent
+// <BuildsCard> — the swarm builder's recent builds, newest first: which agent
 // config PR heads it built, how each ended, and what `nix` printed when one
 // failed. One card per build; selecting a card opens it. Reads
-// `GET /api/builder/runs`. A `swarm-builder` commit status links here as
-// `/builds?run=<id>`, which opens that build's card and scrolls to it.
+// `GET /api/builder/runs`. A `swarm-builder` commit status links to the jobs
+// page as `/jobs?run=<id>`, which opens that build's card and scrolls to it.
+// The card sits under the job graph on that page; the old `/builds` address
+// redirects there with its query.
 import { useEffect, useRef, useState } from "preact/hooks";
 import { useSearch } from "wouter-preact";
 import { ApiErrorPanel } from "@hive/shared/api-error-panel.js";
@@ -91,7 +93,7 @@ function BuildCard({
   );
 }
 
-export function BuildsPage() {
+export function BuildsCard() {
   const wanted = wantedRun(useSearch());
   const [intervalMs, setIntervalMs] =
     useState<RefreshIntervalMs>(DEFAULT_INTERVAL_MS);

frontend/packages/swarm-ui/src/pages/builds/builds-types.ts

@@ -37,6 +37,11 @@ export const OUTCOME_TONE: Record<BuildOutcome, BadgeTone> = {
   error: "warning",
 };
 
+/** Where an old `/builds` link goes: the jobs page, keeping its query. */
+export function jobsHref(search: string): string {
+  return search === "" ? "/jobs" : `/jobs?${search}`;
+}
+
 /** The run a `?run=<id>` query names, or `null` when it names none. */
 export function wantedRun(search: string): string | null {
   const id = new URLSearchParams(search).get("run");

frontend/packages/swarm-ui/src/shell/Shell.tsx

@@ -58,7 +58,6 @@ const NAV_ITEMS: { href: string; label: string; accent: string }[] = [
   { href: "/notifications", label: "notifications", accent: "var(--yellow)" },
   { href: "/issues", label: "issues", accent: "var(--yellow)" },
   { href: "/review", label: "review", accent: "var(--amber)" },
-  { href: "/builds", label: "builds", accent: "var(--green)" },
   { href: "/components", label: "components", accent: "var(--blue)" },
 ];