feat(hubs): match dev.flow-master.ai workbench pattern + 4 named workflows

Inspected dev.flow-master.ai/dashboard/hubs/{procurement,hr,it} via real
dev-login. Real hub structure is: Workbench title + Workflow Commands
(4 named buttons) + Queue (left) + Selected Work (right).

- Procurement: New purchase request / Vendor approval / PO change-cancel / Three-way match
- HR: Employee onboarding / Off-boarding / Sick leave / Payroll management
- IT: Access request / Equipment request / Service ticket / User off-boarding

Hub.tsx rewritten: header + Workflow Commands grid + queue/selected
split pane that matches dev's 'Queue' + 'Selected work' layout.

Oracle gap #3 (hubs not feature parity) — partial close. Approvals queue
and document browser still outstanding but the workbench shape now
mirrors dev.

src/scenes/Hub.tsx

@@ -7,46 +7,58 @@ import { Branch, Layers, Pulse } from "../components/icons";
 
 export type HubKey = "procurement" | "hr" | "it";
 
+interface HubWorkflow {
+  label: string;
+  subject: string;
+  processHint: string;
+}
+
 interface HubSpec {
   title: string;
-  eyebrow: string;
+  workbench: string;
   intro: string;
   match: RegExp;
-  quickActions: { label: string; subject: string; processHint: string }[];
+  workflows: HubWorkflow[];
 }
 
 const HUBS: Record<HubKey, HubSpec> = {
   procurement: {
-    title: "Procurement Hub",
-    eyebrow: "Purchase requests, vendor approvals, three-way match",
+    title: "Procurement workbench",
+    workbench: "Purchase requests, vendor approvals, three-way match",
     intro:
       "Everything a store manager needs to buy something — from a laptop to a forklift — and watch it move through the approval chain.",
     match: /procure|purchase|vendor|\bpo\b|\bp2p\b|requisition|payment|invoice/i,
-    quickActions: [
-      { label: "Request a new laptop", subject: "store-204-laptop", processHint: "procurement" },
-      { label: "Submit a quote for review", subject: "vendor-quote-Q3", processHint: "procurement" },
+    workflows: [
+      { label: "New purchase request", subject: "store-204-laptop", processHint: "procurement" },
+      { label: "Vendor approval", subject: "vendor-quote-Q3", processHint: "vendor" },
+      { label: "PO change / cancel", subject: "po-change-may", processHint: "po" },
+      { label: "Three-way match", subject: "match-batch-mar", processHint: "match" },
     ],
   },
   hr: {
-    title: "People Hub",
-    eyebrow: "Hiring, onboarding, leave, performance",
+    title: "HR workbench",
+    workbench: "Hiring, onboarding, leave, payroll",
     intro:
       "All people movements run here. Start an onboarding for a new hire, file a leave request, or kick off a review cycle.",
     match: /onboard|offboard|leave|\bhr\b|hiring|payroll|employee|people operations/i,
-    quickActions: [
-      { label: "Onboard a new hire", subject: "new-hire-2026Q3", processHint: "onboard" },
-      { label: "Request annual leave", subject: "leave-7d-may", processHint: "leave" },
+    workflows: [
+      { label: "Employee onboarding", subject: "new-hire-2026Q3", processHint: "onboard" },
+      { label: "Off-boarding", subject: "leaver-2026Q3", processHint: "offboard" },
+      { label: "Sick leave", subject: "sick-leave-may", processHint: "leave" },
+      { label: "Payroll management", subject: "payroll-Q3-2026", processHint: "payroll" },
     ],
   },
   it: {
-    title: "IT Hub",
-    eyebrow: "Tickets, access requests, incident response",
+    title: "IT workbench",
+    workbench: "Access requests, equipment, service tickets, off-boarding",
     intro:
       "When something breaks, request access, or you need a new account — file it here and route it to the right on-call.",
     match: /\bit\b|ticket|incident|service operations|access request|sap access|laptop request|hardware request|software request|password reset|account provisioning/i,
-    quickActions: [
-      { label: "Open an incident", subject: "incident-store-204", processHint: "service" },
-      { label: "Request system access", subject: "access-sap-RW", processHint: "access" },
+    workflows: [
+      { label: "Access request", subject: "access-sap-RW", processHint: "access" },
+      { label: "Equipment request", subject: "store-204-laptop", processHint: "equipment" },
+      { label: "Service ticket", subject: "incident-store-204", processHint: "service" },
+      { label: "User off-boarding", subject: "user-leaver-jun", processHint: "offboard" },
     ],
   },
 };
@@ -92,6 +104,11 @@ export default function Hub({ hub }: { hub: HubKey }) {
   const matching = (flows || []).filter((f) => spec.match.test(`${f.display_name} ${f.description || ""} ${f.name || ""}`)).slice(0, 8);
   const fallback = (flows || []).slice(0, 6);
   const visible = matching.length > 0 ? matching : fallback;
+  const [selectedKey, setSelectedKey] = useState<string | null>(null);
+  useEffect(() => {
+    if (!selectedKey && visible.length > 0) setSelectedKey(visible[0]._key);
+  }, [visible, selectedKey]);
+  const selected = visible.find((f) => f._key === selectedKey) || null;
 
   const startInstance = async (flowKey: string, subject: string, label: string) => {
     setBusy(flowKey);
@@ -122,15 +139,15 @@ export default function Hub({ hub }: { hub: HubKey }) {
   return (
     <div className="hub-scene">
       <header className="hub-head">
-        <div className="mc-hero-eyebrow"><Layers size={12} /> {spec.eyebrow}</div>
+        <div className="mc-hero-eyebrow"><Layers size={12} /> {spec.workbench}</div>
         <h2 className="mc-hero-title">{spec.title}</h2>
         <p className="hub-intro">{spec.intro}</p>
       </header>
 
-      <section className="hub-quick">
-        <div className="hub-section-label">QUICK ACTIONS</div>
+      <section className="hub-commands">
+        <div className="hub-section-label">{spec.title.split(" ")[0].toUpperCase()} WORKFLOW COMMANDS</div>
         <div className="hub-quick-grid">
-          {spec.quickActions.map((qa) => (
+          {spec.workflows.map((qa) => (
             <button
               key={qa.label}
               className="hub-quick-card"
@@ -138,36 +155,54 @@ export default function Hub({ hub }: { hub: HubKey }) {
               disabled={!flows}
             >
               <div className="hub-quick-title"><Pulse size={12} /> {qa.label}</div>
-              <div className="hub-quick-meta">Looks up "{qa.processHint}" in your catalogue</div>
+              <div className="hub-quick-meta">Open workflow</div>
             </button>
           ))}
         </div>
       </section>
 
-      <section className="hub-catalogue">
-        <div className="hub-section-label">RELATED PROCESSES</div>
-        {flows === null && <div className="hub-empty">Loading catalogue…</div>}
-        {flows !== null && visible.length === 0 && (
-          <div className="hub-empty">
-            No matching published processes yet. Open the <button className="link-inline" onClick={() => setScene("studio")}>Process Studio</button> to build one.
-          </div>
-        )}
-        <div className="hub-catalogue-grid">
-          {visible.map((f) => (
-            <div key={f._key} className="hub-flow-card">
-              <div className="hub-flow-title"><Branch size={11} /> {f.display_name}</div>
-              {f.description && <div className="hub-flow-desc">{f.description.slice(0, 160)}</div>}
+      <div className="hub-split">
+        <section className="hub-queue">
+          <div className="hub-section-label">{spec.title.split(" ")[0].toUpperCase()} QUEUE</div>
+          {flows === null && <div className="hub-empty">Loading…</div>}
+          {flows !== null && visible.length === 0 && (
+            <div className="hub-empty">
+              Nothing in the queue yet. Open the <button className="link-inline" onClick={() => setScene("studio")}>Process Studio</button> to publish a process.
+            </div>
+          )}
+          <ul className="hub-queue-list">
+            {visible.map((f) => (
+              <li key={f._key}>
+                <button
+                  className={`hub-queue-row ${f._key === selectedKey ? "active" : ""}`}
+                  onClick={() => setSelectedKey(f._key)}
+                >
+                  <Branch size={11} />
+                  <span className="hub-queue-name">{f.display_name}</span>
+                </button>
+              </li>
+            ))}
+          </ul>
+        </section>
+
+        <section className="hub-selected">
+          <div className="hub-section-label">SELECTED WORK</div>
+          {!selected && <div className="hub-empty">Select a row on the left.</div>}
+          {selected && (
+            <div className="hub-flow-card">
+              <div className="hub-flow-title"><Branch size={11} /> {selected.display_name}</div>
+              {selected.description && <div className="hub-flow-desc">{selected.description.slice(0, 320)}</div>}
               <button
-                className="btn btn-secondary"
-                disabled={busy === f._key}
-                onClick={() => startInstance(f._key, "", f.display_name)}
+                className="btn btn-primary"
+                disabled={busy === selected._key}
+                onClick={() => startInstance(selected._key, "", selected.display_name)}
               >
-                {busy === f._key ? "Starting…" : "Start an instance"}
+                {busy === selected._key ? "Starting…" : "Start an instance"}
               </button>
             </div>
-          ))}
-        </div>
-      </section>
+          )}
+        </section>
+      </div>
     </div>
   );
 }