fix: track costs for all providers, not just fal

The audio and video executors only tracked costs when the provider was
"fal". Other providers with pricing info (replicate, kie, etc.) were
silently skipped. Match the pattern used in generate3dExecutor.

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

src/store/execution/generateAudioExecutor.ts

@@ -141,7 +141,7 @@ export async function executeGenerateAudio(
       });
 
       // Track cost
-      if (nodeData.selectedModel?.provider === "fal" && nodeData.selectedModel?.pricing) {
+      if (nodeData.selectedModel?.pricing) {
         addIncurredCost(nodeData.selectedModel.pricing.amount);
       }
 

src/store/execution/generateVideoExecutor.ts

@@ -148,7 +148,7 @@ export async function executeGenerateVideo(
       });
 
       // Track cost
-      if (nodeData.selectedModel?.provider === "fal" && nodeData.selectedModel?.pricing) {
+      if (nodeData.selectedModel?.pricing) {
         addIncurredCost(nodeData.selectedModel.pricing.amount);
       }