FN-6892: show default model for configured prompt nodes

Prompt workflow nodes with inline prompts or names now summarize their default model instead of appearing unconfigured.

- Return the localized Default model summary for model prompt nodes without pinned provider/model settings when prompt or name is present.
- Cover direct prompt summary cases and all built-in workflow prompt nodes to prevent Not configured regressions.
- Add localized summary text and workflow-step documentation for default-model prompt nodes.

Files changed:
 docs/workflow-steps.md                             |  2 +-
 .../nodes/__tests__/node-summary.test.ts           | 32 ++++++++++++++++++++++
 .../dashboard/app/components/nodes/node-summary.ts |  7 +++++
 packages/i18n/locales/en/common.json               |  1 +
 packages/i18n/locales/es/common.json               |  1 +
 packages/i18n/locales/fr/common.json               |  1 +
 packages/i18n/locales/ko/common.json               |  1 +
 packages/i18n/locales/zh-CN/common.json            |  1 +
 packages/i18n/locales/zh-TW/common.json            |  1 +
 9 files changed, 46 insertions(+), 1 deletion(-)

Fusion-Task-Id: FN-6892

Fusion-Task-Lineage: 5892429d-22ee-495e-bc40-06cbf81ee471

docs/workflow-steps.md

@@ -343,7 +343,7 @@ A prompt-mode workflow step can set its own model with:
 - `modelProvider`
 - `modelId`
 
-If both are set, step execution uses that model; otherwise it falls back to default model selection.
+If both are set, step execution uses that model; otherwise it falls back to default model selection. Dashboard node summaries show that unpinned prompt-step state as **Default model**.
 
 ## Default-On Behavior for New Tasks
 

packages/dashboard/app/components/nodes/__tests__/node-summary.test.ts

@@ -1,3 +1,4 @@
+import { BUILTIN_WORKFLOWS } from "@fusion/core";
 import { describe, expect, it } from "vitest";
 import { bareSkillName, nodeConfigSummary, type NodeSummaryCatalogs } from "../node-summary";
 import type { WorkflowFlowNodeData, WorkflowEditorNodeKind } from "../WorkflowNodeTypes";
@@ -25,6 +26,18 @@ describe("nodeConfigSummary", () => {
     expect(summary).toBe("Claude 3 Opus");
   });
 
+  it("model executor with prompt and no pinned model → Default model", () => {
+    const summary = nodeConfigSummary(node("prompt", { executor: "model", prompt: "Research prospects" }));
+    expect(summary).toBe("Default model");
+  });
+
+  it("model executor with name, prompt, and no pinned model → Default model", () => {
+    const summary = nodeConfigSummary(
+      node("prompt", { executor: "model", name: "Source prospects", prompt: "Research prospects" }),
+    );
+    expect(summary).toBe("Default model");
+  });
+
   it("model executor defaults when executor unset", () => {
     const summary = nodeConfigSummary(node("prompt", { modelProvider: "openai", modelId: "gpt-4" }));
     expect(summary).toBe("openai/gpt-4");
@@ -142,6 +155,25 @@ describe("nodeConfigSummary", () => {
     expect(summary).toBe("Not configured");
   });
 
+  it("no built-in workflow prompt node summarizes as Not configured", () => {
+    // Keep this invariant beside the shared helper because desktop cards and the
+    // mobile graph both consume nodeConfigSummary(), so one direct assertion
+    // covers both render paths without duplicating UI fixtures.
+    const offenders = BUILTIN_WORKFLOWS.flatMap((workflow) =>
+      workflow.ir.nodes
+        .filter((workflowNode) => workflowNode.kind === "prompt")
+        .map((workflowNode) => {
+          const summary = nodeConfigSummary(
+            node(workflowNode.kind as WorkflowEditorNodeKind, workflowNode.config ?? {}),
+          );
+          return { workflowId: workflow.id, nodeId: workflowNode.id, summary };
+        })
+        .filter((entry) => entry.summary === "Not configured"),
+    );
+
+    expect(offenders).toEqual([]);
+  });
+
   it("script node → scriptName", () => {
     const summary = nodeConfigSummary(node("script", { scriptName: "lint" }));
     expect(summary).toBe("lint");

packages/dashboard/app/components/nodes/node-summary.ts

@@ -98,6 +98,10 @@ export function bareSkillName(name: string): string {
  * Catalog name resolution is best-effort: when a catalog is missing or the id is
  * unknown, the raw id/command/name is returned — never blank for a configured
  * node (KTD-6 raw-id fallback).
+ *
+ * FNXC:WorkflowNodeSummary 2026-06-21-00:00:
+ * Built-in prompt nodes that use the default model are configured by their inline prompt or display name even when they do not pin modelProvider/modelId.
+ * Show "Default model" for that model-executor state so workflow editor and mobile graph summaries never imply those built-ins are incomplete.
  */
 export function nodeConfigSummary(
   data: WorkflowFlowNodeData,
@@ -163,6 +167,9 @@ export function nodeConfigSummary(
       const model = modelSummary(config, catalogs);
       if (model) return model;
       if (config.awaitInput === true) return t("workflowNodes.summaryAwaitInput", "Waits for user input");
+      if (str(config.prompt).trim() || str(config.name).trim()) {
+        return t("workflowNodes.summaryDefaultModel", "Default model");
+      }
       return t("workflowNodes.summaryNotConfigured", "Not configured");
     }
     case "script": {

packages/i18n/locales/en/common.json

@@ -223,6 +223,7 @@
   "workflowNodes": {
     "summaryAwaitInput": "Waits for user input",
     "summaryCodeDefault": "TypeScript",
+    "summaryDefaultModel": "Default model",
     "summaryGateAdvisory": "Advisory",
     "summaryGateBlocks": "Gate (blocks)",
     "summaryHoldRelease": "Release: {{release}}",

packages/i18n/locales/es/common.json

@@ -223,6 +223,7 @@
   "workflowNodes": {
     "summaryAwaitInput": "",
     "summaryCodeDefault": "",
+    "summaryDefaultModel": "",
     "summaryGateAdvisory": "",
     "summaryGateBlocks": "",
     "summaryHoldRelease": "",

packages/i18n/locales/fr/common.json

@@ -223,6 +223,7 @@
   "workflowNodes": {
     "summaryAwaitInput": "",
     "summaryCodeDefault": "",
+    "summaryDefaultModel": "",
     "summaryGateAdvisory": "",
     "summaryGateBlocks": "",
     "summaryHoldRelease": "",

packages/i18n/locales/ko/common.json

@@ -223,6 +223,7 @@
   "workflowNodes": {
     "summaryAwaitInput": "",
     "summaryCodeDefault": "",
+    "summaryDefaultModel": "",
     "summaryGateAdvisory": "",
     "summaryGateBlocks": "",
     "summaryHoldRelease": "",

packages/i18n/locales/zh-CN/common.json

@@ -223,6 +223,7 @@
   "workflowNodes": {
     "summaryAwaitInput": "",
     "summaryCodeDefault": "",
+    "summaryDefaultModel": "",
     "summaryGateAdvisory": "",
     "summaryGateBlocks": "",
     "summaryHoldRelease": "",

packages/i18n/locales/zh-TW/common.json

@@ -223,6 +223,7 @@
   "workflowNodes": {
     "summaryAwaitInput": "",
     "summaryCodeDefault": "",
+    "summaryDefaultModel": "",
     "summaryGateAdvisory": "",
     "summaryGateBlocks": "",
     "summaryHoldRelease": "",