feat(44-02): add Switch execution and toggle-aware data flow

- Export executeSwitch from execution/index.ts
- Import executeSwitch in workflowStore.ts
- Add switch case to executeWorkflow (after router)
- Add switch case to regenerateNode (after router)
- Import SwitchNodeData in connectedInputs.ts
- Add Switch passthrough logic with toggle filtering in connectedInputs.ts
  - Disabled outputs block data flow (no downstream input)
  - Enabled outputs recursively traverse upstream (same pattern as Router)
  - Edge type determined by switch inputType field

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/store/execution/index.ts

@@ -18,6 +18,7 @@ export {
   executeImageCompare,
   executeGlbViewer,
   executeRouter,
+  executeSwitch,
 } from "./simpleNodeExecutors";
 
 export { executeNanoBanana } from "./nanoBananaExecutor";

src/store/utils/connectedInputs.ts

@@ -24,6 +24,7 @@ import {
   PromptConstructorNodeData,
   LLMGenerateNodeData,
   GLBViewerNodeData,
+  SwitchNodeData,
 } from "@/types";
 
 /**
@@ -191,6 +192,37 @@ export function getConnectedInputsPure(
         return; // Skip normal getSourceOutput processing for this edge
       }
 
+      // Switch passthrough — traverse upstream if output is enabled
+      if (sourceNode.type === "switch") {
+        const switchData = sourceNode.data as SwitchNodeData;
+        const switchId = edge.sourceHandle; // Handle ID matches switch entry id
+        const switchEntry = switchData.switches?.find(s => s.id === switchId);
+
+        // Skip disabled outputs — data does not flow through disabled switches
+        if (!switchEntry || !switchEntry.enabled) {
+          return; // Block this path
+        }
+
+        // Enabled switch: recursively get upstream data (same pattern as router)
+        const switchInputs = getConnectedInputsPure(sourceNode.id, nodes, edges, _visited);
+        const edgeType = switchData.inputType;
+
+        if (edgeType === "image") {
+          images.push(...switchInputs.images);
+        } else if (edgeType === "text") {
+          if (switchInputs.text) text = switchInputs.text;
+        } else if (edgeType === "video") {
+          videos.push(...switchInputs.videos);
+        } else if (edgeType === "audio") {
+          audio.push(...switchInputs.audio);
+        } else if (edgeType === "3d") {
+          if (switchInputs.model3d) model3d = switchInputs.model3d;
+        } else if (edgeType === "easeCurve") {
+          if (switchInputs.easeCurve) easeCurve = switchInputs.easeCurve;
+        }
+        return; // Skip normal getSourceOutput processing
+      }
+
       const handleId = edge.targetHandle;
       const { type, value } = getSourceOutput(
         sourceNode,

src/store/workflowStore.ts

@@ -78,6 +78,7 @@ import {
   executeVideoFrameGrab,
   executeGlbViewer,
   executeRouter,
+  executeSwitch,
 } from "./execution";
 import type { NodeExecutionContext } from "./execution";
 export type { LevelGroup } from "./utils/executionUtils";
@@ -1012,6 +1013,9 @@ const workflowStoreImpl: StateCreator<WorkflowStore> = (set, get) => ({
           case "router":
             await executeRouter(executionCtx);
             break;
+          case "switch":
+            await executeSwitch(executionCtx);
+            break;
         }
     }; // End of executeSingleNode helper
 
@@ -1333,6 +1337,9 @@ const workflowStoreImpl: StateCreator<WorkflowStore> = (set, get) => ({
         case "router":
           await executeRouter(executionCtx);
           break;
+        case "switch":
+          await executeSwitch(executionCtx);
+          break;
       }
     };