fix: pass chatbot attachments to Selenium claim worker and add missing re import

- Add `import re` to all Selenium workers that use re.search() for claim number extraction
- Pass uploadedFiles to onHandleForMHSeleniumClaim so attachments reach the MH website
- Save chatbot pending files in check-and-claim and batch-check-and-claim flows

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

apps/Frontend/src/components/claims/claim-form.tsx

@@ -996,6 +996,7 @@ export function ClaimForm({
       appointmentId: appointmentIdToUse,
       insuranceSiteKey: "MH",
       claimId: createdClaim.id,
+      uploadedFiles,
     });
 
     // 5. Close form

apps/Frontend/src/components/layout/chatbot.tsx

@@ -455,6 +455,7 @@ export function ChatbotButton() {
         renderingProvider: checkAndClaimData.renderingProvider ?? null,
       })
     );
+    setChatbotPendingFiles(pendingFiles);
     prefillAndNavigate(checkAndClaimData.memberId, checkAndClaimData.dob, checkAndClaimData.autoCheck);
   };
 
@@ -1113,6 +1114,7 @@ export function ChatbotButton() {
                           serviceDate: null,
                           renderingProvider,
                         }));
+                        setChatbotPendingFiles(pendingFiles);
                         prefillAndNavigate(first!.memberId, first!.dob, first!.autoCheck);
                       }}
                     >