fix: handle new-tab SSO redirect for MassHealth eligibility and history

After login, Chrome on some machines opens the portal dashboard in a new
tab and closes the SSO tab. Poll all window handles until the portal URL
is found, then switch to it — works for both same-tab and new-tab redirects.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/SeleniumService/selenium_MH_eligibilityHistoryCheckWorker.py

@@ -81,6 +81,30 @@ class AutomationMassHealthEligibilityHistoryCheck:
                 )
             )
             login_button.click()
+
+            # Wait for the SSO redirect. On some machines Chrome opens the dashboard
+            # in a new tab and closes the SSO tab — poll ALL window handles.
+            print("[login] Waiting for SSO redirect to provider.masshealth-dental.org ...")
+            deadline = time.time() + 30
+            found = False
+            while time.time() < deadline:
+                time.sleep(0.5)
+                for handle in self.driver.window_handles:
+                    try:
+                        self.driver.switch_to.window(handle)
+                        if self.driver.current_url.startswith("https://provider.masshealth-dental.org"):
+                            print(f"[login] Redirect complete. URL: {self.driver.current_url}")
+                            found = True
+                            break
+                    except Exception:
+                        continue
+                if found:
+                    break
+
+            if not found:
+                print("[login] Redirect timeout — portal window not found in any tab.")
+                return "ERROR: Login redirect timed out — check credentials or portal availability."
+
             return "Success"
         except Exception as e:
             print(f"[login] Error: {e}")