diff --git a/apps/pwa/src/api/client.test.ts b/apps/pwa/src/api/client.test.ts
index 80d86eb..c4cae79 100644
--- a/apps/pwa/src/api/client.test.ts
+++ b/apps/pwa/src/api/client.test.ts
@@ -654,3 +654,33 @@ describe('calendarStore — delete/sync keys', () => {
     expect(state.lastSyncedUid).toBeNull();
   });
 });
+
+// ── Phase 19 (AUTH-LOCAL-08): admin reset-password URL contract ───────────────
+// Regression guard for the post-merge blocker: client.ts targeted
+// /members/:id/reset-password but the API registers /members/:id/password, so the
+// Admin reset sheet 404'd in production. Unit tests on both sides missed it (API
+// tests hit the real path directly; PWA tests mock the fetcher). Pin the exact URL.
+describe('fetchAdminResetPassword — URL contract (Phase 19, AUTH-LOCAL-08)', () => {
+  beforeEach(() => {
+    vi.stubGlobal('fetch', vi.fn());
+  });
+  afterEach(() => {
+    vi.unstubAllGlobals();
+  });
+
+  it('POSTs to /api/admin/members/:id/password (must match admin.ts route)', async () => {
+    vi.mocked(fetch).mockResolvedValueOnce({
+      ok: true,
+      type: 'basic',
+      status: 200,
+    } as unknown as Response);
+
+    const { fetchAdminResetPassword } = await import('./client.js');
+    await fetchAdminResetPassword(7, 'new-password-123');
+
+    expect(fetch).toHaveBeenCalledWith(
+      '/api/admin/members/7/password',
+      expect.objectContaining({ method: 'POST' }),
+    );
+  });
+});
diff --git a/apps/pwa/src/api/client.ts b/apps/pwa/src/api/client.ts
index 2ead9ba..7067342 100644
--- a/apps/pwa/src/api/client.ts
+++ b/apps/pwa/src/api/client.ts
@@ -194,14 +194,15 @@ export async function fetchCreateMember(body: {
 }
 
 /**
- * POST /api/admin/members/:id/reset-password — admin reset of a member's password (Surface 11B).
- * Admin-only; server enforces requireAdmin.
+ * POST /api/admin/members/:id/password — admin reset of a member's password (Surface 11B).
+ * Admin-only; server enforces requireAdmin. (Route is registered as `/members/:id/password`
+ * in apps/api/src/routes/admin.ts — must match exactly or the sheet 404s.)
  */
 export async function fetchAdminResetPassword(
   memberId: number,
   newPassword: string,
 ): Promise<void> {
-  const res = await fetch(`/api/admin/members/${memberId}/reset-password`, {
+  const res = await fetch(`/api/admin/members/${memberId}/password`, {
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },
     credentials: 'include',