feat(workflow): add edge-tool routing and realtime runtime

frontend/src/components/pages/AssistantPage.tsx

@@ -711,6 +711,13 @@ export function AssistantPage(props: AssistantPageProps) {
               ? (assistant.graph as WorkflowGraph)
               : defaultGraph();
           const wfSettings: WorkflowSettings = {
+            runtimeMode:
+              graph.settings?.runtimeMode ?? assistant.runtimeMode ?? "pipeline",
+            llmRoutingMode:
+              graph.settings?.llmRoutingMode ?? "llm_router",
+            realtime:
+              graph.settings?.defaultRealtimeResourceId ||
+              assistant.modelResourceIds.Realtime,
             llm:
               graph.settings?.defaultLlmResourceId ||
               assistant.modelResourceIds.LLM,
@@ -811,11 +818,15 @@ export function AssistantPage(props: AssistantPageProps) {
       baseUpsert({
         name: workflowName.trim(),
         type: "workflow",
+        runtimeMode: workflowSettings.runtimeMode,
         enableInterrupt: workflowSettings.allowInterrupt,
         turnConfig: workflowSettings.turnConfig,
         visionEnabled: workflowUsesVision(workflowGraph),
         visionModelResourceId: null,
         modelResourceIds: {
+          ...(workflowSettings.realtime
+            ? { Realtime: workflowSettings.realtime }
+            : {}),
           ...(workflowSettings.llm ? { LLM: workflowSettings.llm } : {}),
           ...(workflowSettings.asr ? { ASR: workflowSettings.asr } : {}),
           ...(workflowSettings.tts ? { TTS: workflowSettings.tts } : {}),
@@ -1294,6 +1305,7 @@ export function AssistantPage(props: AssistantPageProps) {
         dirty={dirty}
         saveError={saveError}
         modelOptions={{
+          realtime: credOptions("Realtime"),
           llm: credOptions("LLM"),
           asr: credOptions("ASR"),
           tts: credOptions("TTS"),