chore: add integration tests for import/save route regression coverage

frontend/src/api/__tests__/npmImport.test.ts

@@ -1,5 +1,5 @@
 import { describe, it, expect, vi, beforeEach } from 'vitest';
-import { cancelNPMImport } from '../npmImport';
+import { uploadNPMExport, commitNPMImport, cancelNPMImport } from '../npmImport';
 import client from '../client';
 
 vi.mock('../client', () => ({
@@ -26,6 +26,67 @@ describe('npmImport API', () => {
     });
   });
 
+  it('uploadNPMExport posts upload endpoint with content payload', async () => {
+    const content = '{"proxy_hosts":[]}';
+    const mockResponse = {
+      session: {
+        id: 'npm-session-456',
+        state: 'reviewing',
+        source: 'npm',
+      },
+      preview: {
+        hosts: [],
+        conflicts: [],
+        errors: [],
+      },
+      conflict_details: {},
+    };
+
+    mockedPost.mockResolvedValue({ data: mockResponse });
+
+    const result = await uploadNPMExport(content);
+
+    expect(client.post).toHaveBeenCalledWith('/import/npm/upload', { content });
+    expect(result).toEqual(mockResponse);
+  });
+
+  it('commitNPMImport posts commit endpoint with session_uuid, resolutions, and names body', async () => {
+    const sessionUUID = 'npm-session-789';
+    const resolutions = { 'npm.example.com': 'replace' };
+    const names = { 'npm.example.com': 'NPM Example' };
+    const mockResponse = {
+      created: 1,
+      updated: 1,
+      skipped: 0,
+      errors: [],
+    };
+
+    mockedPost.mockResolvedValue({ data: mockResponse });
+
+    const result = await commitNPMImport(sessionUUID, resolutions, names);
+
+    expect(client.post).toHaveBeenCalledWith('/import/npm/commit', {
+      session_uuid: sessionUUID,
+      resolutions,
+      names,
+    });
+    expect(result).toEqual(mockResponse);
+  });
+
+  it('forwards uploadNPMExport errors', async () => {
+    const error = new Error('upload failed');
+    mockedPost.mockRejectedValue(error);
+
+    await expect(uploadNPMExport('{"proxy_hosts":[]}')).rejects.toBe(error);
+  });
+
+  it('forwards commitNPMImport errors', async () => {
+    const error = new Error('commit failed');
+    mockedPost.mockRejectedValue(error);
+
+    await expect(commitNPMImport('npm-session-123', {}, {})).rejects.toBe(error);
+  });
+
   it('forwards cancelNPMImport errors', async () => {
     const error = new Error('cancel failed');
     mockedPost.mockRejectedValue(error);