feat: set OpenRouter as primary AI provider with Google Gemini fallback

lib/ai/orchestrator.ts

@@ -50,10 +50,44 @@ export async function orchestrateGeneration(
     };
   }
 
-  // 1. Try Primary Provider (Google Gemini)
+  // 1. Try Primary Provider (OpenRouter)
+  if (isProviderAvailable("openrouter") && hasOpenRouterKey) {
+    try {
+      console.log(`[AI Orchestrator] Attempting Primary (OpenRouter: ${config.ai.backup.model})...`);
+      const result = await generateWithOpenRouter({
+        model: config.ai.backup.model,
+        prompt: style.prompt,
+        negativePrompt: style.negativePrompt,
+        imageBase64,
+        mimeType,
+        timeoutMs: config.ai.backup.timeoutMs,
+      });
+
+      resetProvider("openrouter");
+      return {
+        imageUrl: result.imageUrl,
+        providerUsed: "openrouter",
+        modelUsed: result.model,
+        durationMs: Date.now() - startTime,
+        fallbackTriggered: false,
+      };
+    } catch (primaryError: any) {
+      if (isContentSafetyError(primaryError)) {
+        console.warn(`[AI Orchestrator] Primary provider (OpenRouter) rejected image for safety:`, primaryError.message);
+        throw new ContentSafetyError(primaryError.message);
+      }
+
+      console.warn(`[AI Orchestrator] Primary provider (OpenRouter) failed:`, primaryError.message);
+      warnings.push(`Primary (OpenRouter) failed: ${primaryError.message}`);
+    }
+  } else {
+    warnings.push("Primary provider key (OpenRouter) missing or in cooldown. Skipping to fallback.");
+  }
+
+  // 2. Try Fallback Provider (Google Gemini)
   if (isProviderAvailable("gemini") && hasGeminiKey) {
     try {
-      console.log(`[AI Orchestrator] Attempting Primary (Gemini: ${config.ai.primary.model})...`);
+      console.log(`[AI Orchestrator] Attempting Fallback (Gemini: ${config.ai.primary.model})...`);
       const result = await generateWithGemini({
         model: config.ai.primary.model,
         prompt: style.prompt,
@@ -70,51 +104,17 @@ export async function orchestrateGeneration(
         providerUsed: "gemini",
         modelUsed: result.model,
         durationMs: Date.now() - startTime,
-        fallbackTriggered: false,
-      };
-    } catch (primaryError: any) {
-      // Content safety rejections are caused by user input, NOT provider downtime
-      if (isContentSafetyError(primaryError)) {
-        console.warn(`[AI Orchestrator] Primary provider (Gemini) rejected image for safety:`, primaryError.message);
-        throw new ContentSafetyError(primaryError.message);
-      }
-
-      console.warn(`[AI Orchestrator] Primary provider (Gemini) failed:`, primaryError.message);
-      warnings.push(`Primary failed: ${primaryError.message}`);
-    }
-  } else {
-    warnings.push("Primary provider key missing. Skipping to backup.");
-  }
-
-  // 2. Try Backup Provider (OpenRouter)
-  if (isProviderAvailable("openrouter") && hasOpenRouterKey) {
-    try {
-      console.log(`[AI Orchestrator] Attempting Backup (OpenRouter: ${config.ai.backup.model})...`);
-      const result = await generateWithOpenRouter({
-        model: config.ai.backup.model,
-        prompt: style.prompt,
-        negativePrompt: style.negativePrompt,
-        imageBase64,
-        mimeType,
-        timeoutMs: config.ai.backup.timeoutMs,
-      });
-
-      return {
-        imageUrl: result.imageUrl,
-        providerUsed: "openrouter",
-        modelUsed: result.model,
-        durationMs: Date.now() - startTime,
         fallbackTriggered: true,
         warnings,
       };
-    } catch (backupError: any) {
-      if (isContentSafetyError(backupError)) {
-        console.warn(`[AI Orchestrator] Backup provider (OpenRouter) rejected image for safety:`, backupError.message);
-        throw new ContentSafetyError(backupError.message);
+    } catch (fallbackError: any) {
+      if (isContentSafetyError(fallbackError)) {
+        console.warn(`[AI Orchestrator] Fallback provider (Gemini) rejected image for safety:`, fallbackError.message);
+        throw new ContentSafetyError(fallbackError.message);
       }
 
-      console.error(`[AI Orchestrator] Backup provider (OpenRouter) failed:`, backupError.message);
-      warnings.push(`Backup failed: ${backupError.message}`);
+      console.error(`[AI Orchestrator] Fallback provider (Gemini) failed:`, fallbackError.message);
+      warnings.push(`Fallback (Gemini) failed: ${fallbackError.message}`);
     }
   }