fix: BCBS MA eligibility — name extraction, tab switching, DOB input, button color

- Extract patient first/last name from Patient Information DOM section
  (scoped to avoid duplicate Subscriber Information column values)
- Switch to latest tab at start of step2 (Eligibility Identifier opens in new tab)
- DOB: double-click + ActionChains.send_keys (no pyperclip, avoids Chrome crash)
- BCBS MA button changed to variant="default" to match nearby buttons
- Backend processor uses extracted names from selenium result

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

apps/Frontend/src/components/insurance-status/bcbs-ma-button-modal.tsx

@@ -265,7 +265,7 @@ export function BcbsMaEligibilityButton({
     <>
       <Button
         className="w-full"
-        variant="outline"
+        variant="default"
         disabled={isFormIncomplete || isStarting}
         onClick={handleStart}
       >