Add agent workbench terminal and live PostgreSQL/Trino SQL consoles.

Clicking agents opens a dedicated terminal panel; topology PostgreSQL/Trino nodes open SQL workbench with ten demo queries and Postgres vs Trino benchmark.

ui/src/hooks/useCommandCenter.ts

@@ -35,6 +35,18 @@ function resolveProbeId(nodeId: string) {
   return infra?.id || aliased
 }
 
+
+const SQL_NODE_ENGINES: Record<string, 'postgres' | 'trino'> = {
+  postgresql: 'postgres',
+  'src-postgres': 'postgres',
+  trino: 'trino',
+  'query-trino': 'trino',
+}
+
+function resolveSqlEngine(nodeId: string): 'postgres' | 'trino' | null {
+  return SQL_NODE_ENGINES[nodeId] || SQL_NODE_ENGINES[resolveProbeId(nodeId)] || null
+}
+
 export function useCommandCenter() {
   const [agents, setAgents] = useState<Agent[]>([])
   const [agentsLoading, setAgentsLoading] = useState(true)
@@ -54,6 +66,7 @@ export function useCommandCenter() {
   const [nodeBusy, setNodeBusy] = useState(false)
   const [mainView, setMainView] = useState<'platform' | 'approvals' | 'presentation' | 'dataquality' | 'knowledge' | 'storage' | 'search'>('platform')
   const [approvalHighlight, setApprovalHighlight] = useState(false)
+  const [workbenchMode, setWorkbenchMode] = useState<'agent' | 'sql-postgres' | 'sql-trino' | null>(null)
   const [chatExpanded, setChatExpanded] = useState(false)
   const promptTimeoutRef = useRef<ReturnType<typeof setTimeout> | null>(null)
   const [terminalExpanded, setTerminalExpanded] = useState(true)
@@ -206,10 +219,19 @@ export function useCommandCenter() {
     setSelectedNodeId(nodeId)
   }, [])
 
-  const selectNode = useCallback(async (nodeId: string) => {
+  const selectNode = useCallback(async (nodeId: string, options?: { keepWorkbench?: 'agent' }) => {
     const stub = findNodeStub(nodeId)
     if (!stub) return
     const probeId = resolveProbeId(nodeId)
+    const sqlEng = resolveSqlEngine(nodeId)
+    if (sqlEng) {
+      setWorkbenchMode(sqlEng === 'postgres' ? 'sql-postgres' : 'sql-trino')
+      setSelectedAgentId(null)
+    } else if (options?.keepWorkbench) {
+      setWorkbenchMode(options.keepWorkbench)
+    } else {
+      setWorkbenchMode(null)
+    }
     setSelectedNodeId(probeId)
     setSelectedNode({ ...stub, id: probeId })
     setNodeDetail(null)
@@ -228,6 +250,7 @@ export function useCommandCenter() {
 
   const selectAgent = useCallback((id: string) => {
     setSelectedAgentId(id)
+    setWorkbenchMode('agent')
     setTerminalExpanded(true)
     const agent = agents.find((a) => a.id === id)
     if (!agent) return
@@ -235,7 +258,7 @@ export function useCommandCenter() {
     if (nodeId) {
       const stub = findNodeStub(nodeId)
       if (stub) {
-        selectNode(nodeId)
+        void selectNode(nodeId, { keepWorkbench: 'agent' })
         return
       }
     }
@@ -249,6 +272,7 @@ export function useCommandCenter() {
     setSelectedNode(null)
     setNodeDetail(null)
     setSelectedAgentId(null)
+    setWorkbenchMode(null)
   }, [])
 
   const probeNode = useCallback(() => {
@@ -310,6 +334,7 @@ export function useCommandCenter() {
     setMainView,
     approvalHighlight,
     setApprovalHighlight,
+    workbenchMode,
     inspectorLines,
     terminalSubjectId,
     terminalExpanded,