feat: support relay profile selection

tests/twitter-client-coverage.core.test.ts

@@ -124,6 +124,41 @@ describe('TwitterClient core coverage', () => {
     expect(headers).toEqual({});
   });
 
+  it('adds x-profile-name header when profileName is set', () => {
+    const client = new TwitterClient({ relayBaseUrl: testRelayBaseUrl, profileName: 'work' });
+    const clientPrivate = client as unknown as TwitterClientPrivate;
+
+    expect(clientPrivate.getHeaders()).toEqual({ 'x-profile-name': 'work' });
+  });
+
+  it('ignores blank profileName values', () => {
+    const client = new TwitterClient({ relayBaseUrl: testRelayBaseUrl, profileName: '   ' });
+    const clientPrivate = client as unknown as TwitterClientPrivate;
+
+    expect(clientPrivate.getHeaders()).toEqual({});
+  });
+
+  it('adds x-profile-name to JSON headers when profileName is set', () => {
+    const client = new TwitterClient({ relayBaseUrl: testRelayBaseUrl, profileName: 'work' });
+    const clientPrivate = client as unknown as TwitterClientPrivate & {
+      getJsonHeaders: () => Record<string, string>;
+    };
+
+    expect(clientPrivate.getJsonHeaders()).toEqual({
+      'content-type': 'application/json',
+      'x-profile-name': 'work',
+    });
+  });
+
+  it('adds x-profile-name to upload headers when profileName is set', () => {
+    const client = new TwitterClient({ relayBaseUrl: testRelayBaseUrl, profileName: 'work' });
+    const clientPrivate = client as unknown as TwitterClientPrivate & {
+      getUploadHeaders: () => Record<string, string>;
+    };
+
+    expect(clientPrivate.getUploadHeaders()).toEqual({ 'x-profile-name': 'work' });
+  });
+
   describe('fetchUserArticlePlainText failures', () => {
     it('returns empty object when response is not ok', async () => {
       const mockFetch = vi.fn().mockResolvedValueOnce(makeResponse({ ok: false, status: 500 }));