feat: WorkflowList expandable cards with static graph (#198)

- Workflow cards click to expand/collapse
- Lazy-load descriptor on first expand
- Static WorkflowGraph (all nodes default state, no highlighting)
- Show description, version count, hash
- Fix WorkflowSummary type to match actual API response

packages/workflow-dashboard/src/api.ts

@@ -66,8 +66,13 @@ export type AgentEndpoint = {
 
 export type WorkflowSummary = {
   name: string;
-  currentHash: string;
-  versions: number;
+  hash: string | null;
+  timestamp: number | null;
+};
+
+export type WorkflowHistoryEntry = {
+  hash: string;
+  timestamp: number;
 };
 
 export type ThreadSummary = {
@@ -130,7 +135,7 @@ export type WorkflowDetail = {
   name: string;
   hash: string;
   timestamp: number;
-  history: unknown[];
+  history: readonly WorkflowHistoryEntry[];
   descriptor: WorkflowDescriptor | null;
 };
 
@@ -147,14 +152,15 @@ export function listWorkflows(agent: string): Promise<{ workflows: WorkflowSumma
   return fetchJson(agentBase(agent), "/workflows");
 }
 
+export async function getWorkflowDetail(agent: string, name: string): Promise<WorkflowDetail> {
+  return fetchJson<WorkflowDetail>(agentBase(agent), `/workflows/${encodeURIComponent(name)}`);
+}
+
 export async function getWorkflowDescriptor(
   agent: string,
   name: string,
 ): Promise<WorkflowDescriptor | null> {
-  const res = await fetchJson<WorkflowDetail>(
-    agentBase(agent),
-    `/workflows/${encodeURIComponent(name)}`,
-  );
+  const res = await getWorkflowDetail(agent, name);
   return res.descriptor;
 }
 

packages/workflow-dashboard/src/components/workflow-list.tsx

@@ -1,12 +1,168 @@
-import { listWorkflows } from "../api.ts";
+import { useCallback, useEffect, useMemo, useState } from "react";
+import type { WorkflowDetail } from "../api.ts";
+import { getWorkflowDetail, listWorkflows } from "../api.ts";
 import { useFetch } from "../hooks.ts";
+import { type NodeState, WorkflowGraph } from "./workflow-graph/index.ts";
 
 type Props = {
   agent: string;
 };
 
+type DetailCacheEntry =
+  | { status: "loading" }
+  | { status: "error"; message: string }
+  | { status: "ok"; detail: WorkflowDetail };
+
+function versionCount(detail: WorkflowDetail): number {
+  return detail.history.length + 1;
+}
+
+function ExpandedWorkflowBody({
+  cacheEntry,
+  staticNodeStates,
+}: {
+  cacheEntry: DetailCacheEntry | undefined;
+  staticNodeStates: Map<string, NodeState>;
+}) {
+  if (cacheEntry === undefined || cacheEntry.status === "loading") {
+    return (
+      <p className="text-sm py-2" style={{ color: "var(--color-text-muted)" }}>
+        Loading workflow details...
+      </p>
+    );
+  }
+
+  if (cacheEntry.status === "error") {
+    return (
+      <p className="text-sm py-2" style={{ color: "var(--color-error)" }}>
+        {cacheEntry.message}
+      </p>
+    );
+  }
+
+  const { detail } = cacheEntry;
+  const descriptor = detail.descriptor;
+  const edgeCount = descriptor !== null ? descriptor.graph.edges.length : 0;
+  const vc = versionCount(detail);
+
+  return (
+    <div className="pt-3 space-y-3 border-t" style={{ borderColor: "var(--color-border)" }}>
+      <div>
+        <p className="text-sm font-medium" style={{ color: "var(--color-text)" }}>
+          {detail.name}
+        </p>
+        <p className="text-xs mt-1 mb-1" style={{ color: "var(--color-text-muted)" }}>
+          Hash
+        </p>
+        <code className="text-xs font-mono block" style={{ color: "var(--color-accent)" }}>
+          {detail.hash}
+        </code>
+      </div>
+      <p className="text-xs" style={{ color: "var(--color-text-muted)" }}>
+        {vc} version{vc !== 1 ? "s" : ""}
+      </p>
+      <div>
+        <p className="text-xs mb-1 font-medium" style={{ color: "var(--color-text-muted)" }}>
+          Description
+        </p>
+        <p className="text-sm whitespace-pre-wrap" style={{ color: "var(--color-text)" }}>
+          {descriptor !== null && descriptor.description !== ""
+            ? descriptor.description
+            : descriptor !== null
+              ? "—"
+              : "No descriptor available for this workflow version."}
+        </p>
+      </div>
+      {descriptor !== null && edgeCount > 0 ? (
+        <div
+          className="rounded-lg border overflow-hidden"
+          style={{ borderColor: "var(--color-border)", background: "var(--color-bg)" }}
+        >
+          <div
+            className="px-3 py-2 text-xs flex justify-between items-center"
+            style={{ color: "var(--color-text-muted)", background: "var(--color-surface)" }}
+          >
+            <span className="font-mono">Workflow graph</span>
+            <span>
+              {edgeCount} edge{edgeCount === 1 ? "" : "s"}
+            </span>
+          </div>
+          <div style={{ height: 300, width: "100%" }}>
+            <WorkflowGraph
+              graph={descriptor.graph}
+              roles={descriptor.roles}
+              nodeStates={staticNodeStates}
+              onNodeClick={null}
+            />
+          </div>
+        </div>
+      ) : null}
+    </div>
+  );
+}
+
 export function WorkflowList({ agent }: Props) {
   const { status, data, error } = useFetch(() => listWorkflows(agent), [agent]);
+  const [expanded, setExpanded] = useState<Set<string>>(() => new Set());
+  const [detailsByName, setDetailsByName] = useState<Map<string, DetailCacheEntry>>(
+    () => new Map(),
+  );
+
+  const staticNodeStates = useMemo(() => new Map<string, NodeState>(), []);
+
+  // biome-ignore lint/correctness/useExhaustiveDependencies: reset expansion when switching agents
+  useEffect(() => {
+    setExpanded(new Set());
+    setDetailsByName(new Map());
+  }, [agent]);
+
+  const ensureDetailLoaded = useCallback(
+    (name: string) => {
+      setDetailsByName((prev) => {
+        const cur = prev.get(name);
+        if (cur !== undefined && (cur.status === "ok" || cur.status === "loading")) {
+          return prev;
+        }
+        return new Map(prev).set(name, { status: "loading" });
+      });
+
+      void (async () => {
+        try {
+          const detail = await getWorkflowDetail(agent, name);
+          setDetailsByName((prev) => {
+            const next = new Map(prev);
+            next.set(name, { status: "ok", detail });
+            return next;
+          });
+        } catch (e) {
+          const message = e instanceof Error ? e.message : String(e);
+          setDetailsByName((prev) => {
+            const next = new Map(prev);
+            next.set(name, { status: "error", message });
+            return next;
+          });
+        }
+      })();
+    },
+    [agent],
+  );
+
+  function toggleExpanded(name: string) {
+    let shouldLoad = false;
+    setExpanded((prev) => {
+      const next = new Set(prev);
+      if (next.has(name)) {
+        next.delete(name);
+        return next;
+      }
+      next.add(name);
+      shouldLoad = true;
+      return next;
+    });
+    if (shouldLoad) {
+      ensureDetailLoaded(name);
+    }
+  }
 
   if (status === "loading")
     return <p style={{ color: "var(--color-text-muted)" }}>Loading workflows...</p>;
@@ -21,26 +177,58 @@ export function WorkflowList({ agent }: Props) {
         <p style={{ color: "var(--color-text-muted)" }}>No workflows registered.</p>
       ) : (
         <div className="space-y-2">
-          {workflows.map((w) => (
-            <div
-              key={w.name}
-              className="p-4 rounded-lg border"
-              style={{ background: "var(--color-surface)", borderColor: "var(--color-border)" }}
-            >
-              <div className="flex items-center justify-between">
-                <span className="font-medium">{w.name}</span>
-                <span className="text-xs" style={{ color: "var(--color-text-muted)" }}>
-                  {w.versions} version{w.versions !== 1 ? "s" : ""}
-                </span>
-              </div>
-              <code
-                className="text-xs mt-1 block font-mono"
-                style={{ color: "var(--color-accent)" }}
+          {workflows.map((w) => {
+            const isOpen = expanded.has(w.name);
+            return (
+              <div
+                key={w.name}
+                className="rounded-lg border overflow-hidden"
+                style={{ background: "var(--color-surface)", borderColor: "var(--color-border)" }}
               >
-                {w.currentHash}
-              </code>
-            </div>
-          ))}
+                <button
+                  type="button"
+                  onClick={() => toggleExpanded(w.name)}
+                  className="w-full text-left p-4 flex items-start justify-between gap-3 hover:opacity-90"
+                  style={{ color: "var(--color-text)" }}
+                  aria-expanded={isOpen}
+                >
+                  <div className="min-w-0 flex-1">
+                    <div className="flex items-center gap-2">
+                      <span
+                        className="text-xs font-mono"
+                        style={{ color: "var(--color-text-muted)" }}
+                      >
+                        {isOpen ? "▼" : "▶"}
+                      </span>
+                      <span className="font-medium">{w.name}</span>
+                    </div>
+                    <code
+                      className="text-xs mt-1 block font-mono truncate"
+                      style={{ color: "var(--color-accent)" }}
+                    >
+                      {w.hash !== null ? w.hash : "—"}
+                    </code>
+                    {w.timestamp !== null ? (
+                      <span
+                        className="text-xs mt-1 block"
+                        style={{ color: "var(--color-text-muted)" }}
+                      >
+                        Updated {new Date(w.timestamp).toLocaleString()}
+                      </span>
+                    ) : null}
+                  </div>
+                </button>
+                {isOpen ? (
+                  <div className="px-4 pb-4">
+                    <ExpandedWorkflowBody
+                      cacheEntry={detailsByName.get(w.name)}
+                      staticNodeStates={staticNodeStates}
+                    />
+                  </div>
+                ) : null}
+              </div>
+            );
+          })}
         </div>
       )}
     </div>