feat: purchase-plans update

lib/api/placements.ts

@@ -33,10 +33,17 @@ export const placementsApi = {
       .then((response) => response.items),
 
   /**
-   * Get single placement (deprecated - use getInProject for project-specific data)
+   * Get single placement (requires project_id in original backend)
+   * Uses: GET /workspaces/{workspace_id}/projects/{project_id}/placements/{placement_id}
    */
-  get: (workspaceId: string, placementId: string) =>
-    api.get<Placement>(`/workspaces/${workspaceId}/placements/${placementId}`),
+  get: (
+    workspaceId: string,
+    placementId: string,
+    projectId?: string
+  ) =>
+    api.get<Placement>(
+      `/workspaces/${workspaceId}/projects/${projectId}/placements/${placementId}`
+    ),
 
   /**
    * Get single placement within project
@@ -91,6 +98,47 @@ export const placementsApi = {
       data
     ),
 
+  /**
+   * Create single placement within project (bulk format)
+   * POST /workspaces/{workspace_id}/projects/{project_id}/placements
+   */
+  createInProject: (
+    workspaceId: string,
+    projectId: string,
+    data: {
+      creative_id?: string;
+      channels: Array<{
+        channel_id: string;
+        status?: string;
+        comment?: string;
+        details?: {
+          placement_at?: string;
+          payment_at?: string;
+          cost?: { type: string; value: number };
+          cost_before_bargain?: number;
+          placement_type?: string;
+          format?: string;
+          comment?: string;
+          creative_id?: string;
+        };
+      }>;
+      details?: {
+        placement_at?: string;
+        payment_at?: string;
+        cost?: { type: string; value: number };
+        cost_before_bargain?: number;
+        placement_type?: string;
+        format?: string;
+        comment?: string;
+        creative_id?: string;
+      };
+    }
+  ) =>
+    api.post<{ placements: Placement[] }>(
+      `/workspaces/${workspaceId}/projects/${projectId}/placements`,
+      data
+    ),
+
   /**
    * Update placement
    */