feat(P1): Add align-prompt feature for better text-image relevance

frontend/src/services/editor-api.ts

@@ -197,6 +197,31 @@ class EditorApiClient {
         return response.json()
     }
 
+    /**
+     * Align image prompt with narration - regenerate prompt based on narration
+     */
+    async alignPrompt(
+        storyboardId: string,
+        frameId: string,
+        narration?: string
+    ): Promise<{ image_prompt: string; success: boolean }> {
+        const response = await fetch(
+            `${this.baseUrl}/editor/storyboard/${storyboardId}/frames/${frameId}/align-prompt`,
+            {
+                method: 'POST',
+                headers: { 'Content-Type': 'application/json' },
+                body: JSON.stringify({ narration }),
+            }
+        )
+
+        if (!response.ok) {
+            const error = await response.json().catch(() => ({ detail: response.statusText }))
+            throw new Error(error.detail || `Failed to align prompt: ${response.statusText}`)
+        }
+
+        return response.json()
+    }
+
     /**
      * Inpaint (局部重绘) image for a frame
      */