Fix voice clone NotSupportedError and improve subscription services

frontend/src/services/billingService.ts

@@ -161,6 +161,7 @@ const defaultLimits = {
     video_calls: 0,
     image_edit_calls: 0,
     audio_calls: 0,
+    wavespeed_calls: 0,
     gemini_tokens: 0,
     openai_tokens: 0,
     anthropic_tokens: 0,
@@ -211,6 +212,7 @@ function coerceUsageStats(raw: any): UsageStats {
       video_calls: raw?.limits?.limits?.video_calls ?? 0,
       image_edit_calls: raw?.limits?.limits?.image_edit_calls ?? 0,
       audio_calls: raw?.limits?.limits?.audio_calls ?? 0,
+      wavespeed_calls: raw?.limits?.limits?.wavespeed_calls ?? 0,
       gemini_tokens: raw?.limits?.limits?.gemini_tokens ?? 0,
       openai_tokens: raw?.limits?.limits?.openai_tokens ?? 0,
       anthropic_tokens: raw?.limits?.limits?.anthropic_tokens ?? 0,

frontend/src/services/podcastApi.ts

@@ -786,6 +786,14 @@ export const podcastApi = {
     seed?: number;
     maskImageUrl?: string;
   }): Promise<{ taskId: string; status: string; message: string }> {
+    // Preflight check for video generation
+    await ensurePreflight({
+      provider: 'video',
+      model: 'kling-v2.5-turbo-5s',
+      operation_type: 'video_generation',
+      actual_provider_name: 'wavespeed',
+    });
+    
     const response = await aiApiClient.post("/api/podcast/render/video", {
       project_id: params.projectId,
       scene_id: params.sceneId,
@@ -884,6 +892,14 @@ export const podcastApi = {
     cost: number;
     image_prompt?: string;
   }> {
+    // Preflight check for image generation
+    await ensurePreflight({
+      provider: 'stability',
+      model: 'stability-ai',
+      operation_type: 'image_generation',
+      actual_provider_name: 'wavespeed',
+    });
+    
     const response = await aiApiClient.post("/api/podcast/image", {
       scene_id: params.sceneId,
       scene_title: params.sceneTitle,