fix: pre-merge fixes for develop->master PR

- Add generateAudio and videoFrameGrab cases to executeNode dispatcher
- Add selectedModel null guards in route.ts for all non-Gemini providers
- Fix ConnectionDropMenu wrap-around test (5->6 items after generateAudio)
- Fix audio duration edge cases (NaN guard in formatTime, truthiness check)

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

src/app/api/generate/route.ts

@@ -131,6 +131,13 @@ export async function POST(request: NextRequest) {
 
     // Route to appropriate provider
     if (provider === "replicate") {
+      if (!selectedModel?.modelId || !selectedModel?.displayName) {
+        return NextResponse.json<GenerateResponse>(
+          { success: false, error: "selectedModel with modelId and displayName is required for Replicate" },
+          { status: 400 }
+        );
+      }
+
       // User-provided key takes precedence over env variable
       const replicateApiKey = request.headers.get("X-Replicate-API-Key") || process.env.REPLICATE_API_KEY;
       if (!replicateApiKey) {
@@ -167,8 +174,8 @@ export async function POST(request: NextRequest) {
       // Build generation input
       const genInput: GenerationInput = {
         model: {
-          id: selectedModel!.modelId,
-          name: selectedModel!.displayName,
+          id: selectedModel.modelId,
+          name: selectedModel.displayName,
           provider: "replicate",
           capabilities: capabilitiesForMediaType(mediaType),
           description: null,
@@ -204,6 +211,13 @@ export async function POST(request: NextRequest) {
     }
 
     if (provider === "fal") {
+      if (!selectedModel?.modelId || !selectedModel?.displayName) {
+        return NextResponse.json<GenerateResponse>(
+          { success: false, error: "selectedModel with modelId and displayName is required for fal.ai" },
+          { status: 400 }
+        );
+      }
+
       // User-provided key takes precedence over env variable
       const falApiKey = request.headers.get("X-Fal-API-Key") || process.env.FAL_API_KEY || null;
 
@@ -235,8 +249,8 @@ export async function POST(request: NextRequest) {
       // Build generation input
       const genInput: GenerationInput = {
         model: {
-          id: selectedModel!.modelId,
-          name: selectedModel!.displayName,
+          id: selectedModel.modelId,
+          name: selectedModel.displayName,
           provider: "fal",
           capabilities: capabilitiesForMediaType(mediaType),
           description: null,
@@ -272,6 +286,13 @@ export async function POST(request: NextRequest) {
     }
 
     if (provider === "kie") {
+      if (!selectedModel?.modelId || !selectedModel?.displayName) {
+        return NextResponse.json<GenerateResponse>(
+          { success: false, error: "selectedModel with modelId and displayName is required for Kie.ai" },
+          { status: 400 }
+        );
+      }
+
       // User-provided key takes precedence over env variable
       const kieApiKey = request.headers.get("X-Kie-Key") || process.env.KIE_API_KEY;
       if (!kieApiKey) {
@@ -307,8 +328,8 @@ export async function POST(request: NextRequest) {
       // Build generation input
       const genInput: GenerationInput = {
         model: {
-          id: selectedModel!.modelId,
-          name: selectedModel!.displayName,
+          id: selectedModel.modelId,
+          name: selectedModel.displayName,
           provider: "kie",
           capabilities: capabilitiesForMediaType(mediaType),
           description: null,
@@ -344,6 +365,13 @@ export async function POST(request: NextRequest) {
     }
 
     if (provider === "wavespeed") {
+      if (!selectedModel?.modelId || !selectedModel?.displayName) {
+        return NextResponse.json<GenerateResponse>(
+          { success: false, error: "selectedModel with modelId and displayName is required for WaveSpeed" },
+          { status: 400 }
+        );
+      }
+
       // User-provided key takes precedence over env variable
       const wavespeedApiKey = request.headers.get("X-WaveSpeed-Key") || process.env.WAVESPEED_API_KEY;
       if (!wavespeedApiKey) {
@@ -379,8 +407,8 @@ export async function POST(request: NextRequest) {
       // Build generation input
       const genInput: GenerationInput = {
         model: {
-          id: selectedModel!.modelId,
-          name: selectedModel!.displayName,
+          id: selectedModel.modelId,
+          name: selectedModel.displayName,
           provider: "wavespeed",
           capabilities: capabilitiesForMediaType(mediaType),
           description: null,

src/components/__tests__/ConnectionDropMenu.test.tsx

@@ -245,8 +245,9 @@ describe("ConnectionDropMenu", () => {
     it("should wrap around when navigating past last item", () => {
       render(<ConnectionDropMenu {...defaultProps} handleType="text" connectionType="source" />);
 
-      // Text target options: Prompt, Prompt Constructor, nanoBanana, generateVideo, llmGenerate (5 items)
-      // Navigate down 5 times to wrap to first
+      // Text target options: Prompt, Prompt Constructor, nanoBanana, generateVideo, generateAudio, llmGenerate (6 items)
+      // Navigate down 6 times to wrap to first
+      fireEvent.keyDown(document, { key: "ArrowDown" });
       fireEvent.keyDown(document, { key: "ArrowDown" });
       fireEvent.keyDown(document, { key: "ArrowDown" });
       fireEvent.keyDown(document, { key: "ArrowDown" });

src/components/nodes/GenerateAudioNode.tsx

@@ -302,7 +302,7 @@ export function GenerateAudioNode({ id, data, selected }: NodeProps<GenerateAudi
 
               {/* Progress bar */}
               <div className="flex-1 h-1 bg-neutral-700 rounded-full overflow-hidden relative">
-                {audioRef.current?.duration && isFinite(audioRef.current.duration) && (
+                {!!audioRef.current?.duration && isFinite(audioRef.current.duration) && (
                   <div
                     className="h-full bg-violet-500 transition-all"
                     style={{ width: `${(currentTime / audioRef.current.duration) * 100}%` }}

src/hooks/useAudioPlayback.ts

@@ -190,6 +190,7 @@ export function useAudioPlayback({ audioSrc, waveformData, isLoadingWaveform }:
   }, []);
 
   const formatTime = useCallback((seconds: number) => {
+    if (!Number.isFinite(seconds)) return "0:00";
     const mins = Math.floor(seconds / 60);
     const secs = Math.floor(seconds % 60);
     return `${mins}:${secs.toString().padStart(2, "0")}`;

src/store/execution/executeNode.ts

@@ -21,7 +21,8 @@ import { executeGenerateVideo } from "./generateVideoExecutor";
 import { executeGenerate3D } from "./generate3dExecutor";
 import { executeLlmGenerate } from "./llmGenerateExecutor";
 import { executeSplitGrid } from "./splitGridExecutor";
-import { executeVideoStitch, executeEaseCurve, executeVideoTrim } from "./videoProcessingExecutors";
+import { executeVideoStitch, executeEaseCurve, executeVideoTrim, executeVideoFrameGrab } from "./videoProcessingExecutors";
+import { executeGenerateAudio } from "./generateAudioExecutor";
 
 export interface ExecuteNodeOptions {
   /** When true, executors that support it will fall back to stored inputs. */
@@ -96,5 +97,11 @@ export async function executeNode(
     case "glbViewer":
       await executeGlbViewer(ctx);
       break;
+    case "generateAudio":
+      await executeGenerateAudio(ctx, regenOpts);
+      break;
+    case "videoFrameGrab":
+      await executeVideoFrameGrab(ctx);
+      break;
   }
 }