feat: AI chatbot preauth intent, UnitedDH pre-auth improvements

- Add preauth intent to AI chatbot (classifier, workflow, frontend UI card)
- Auto-prefill preauth form with CDT codes, service date, and mapped prices
- Auto-trigger preauth Selenium handler by insurance siteKey (MH/Tufts/CCA/UnitedDH)
- Default tentative service date to today+3 for preauth (user didn't pick a date)
- Fix #number always means tooth number, distributes to all procedures in comma list
- Fix bare "post"/"pos" → D2954 (was matching D2955 via keyword scorer)
- UnitedDH pre-auth: fill procedure date with Ctrl+A to overwrite prefilled value
- UnitedDH pre-auth: select Location "Summit Dental Care" in step1 (same as billing entity)
- UnitedDH pre-auth: remove page refresh in step9 to preserve pre-auth number
- UnitedDH pre-auth: wait for table rows before extracting pre-auth number
- UnitedDH pre-auth/claim: explicit wait for Submit button after file upload (no sleep)

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

apps/Frontend/src/pages/claims-page.tsx

@@ -40,6 +40,8 @@ export default function ClaimsPage() {
   const [isClaimFormOpen, setIsClaimFormOpen] = useState(false);
   const [selectedPatientId, setSelectedPatientId] = useState<number | null>(null);
   const [chatbotAutoSubmitSiteKey, setChatbotAutoSubmitSiteKey] = useState<string | undefined>(undefined);
+  const [chatbotInitialTab, setChatbotInitialTab] = useState<string | undefined>(undefined);
+  const [chatbotAutoSubmitPreauthSiteKey, setChatbotAutoSubmitPreauthSiteKey] = useState<string | undefined>(undefined);
   // for redirect from appointment page directly, then passing to claimform
   const [selectedAppointmentId, setSelectedAppointmentId] = useState<
     number | null
@@ -258,6 +260,16 @@ export default function ClaimsPage() {
       }
     } catch {}
 
+    // Check if chatbot requested preauth tab
+    try {
+      const preauthRaw = sessionStorage.getItem("chatbot_preauth_prefill");
+      if (preauthRaw) {
+        setChatbotInitialTab("preauth");
+        const parsed = JSON.parse(preauthRaw);
+        if (parsed?.siteKey) setChatbotAutoSubmitPreauthSiteKey(parsed.siteKey);
+      }
+    } catch {}
+
     handleNewClaim(id);
     clearUrlParams(["newPatient"]);
   }, [newPatient]);
@@ -946,6 +958,8 @@ export default function ClaimsPage() {
     setSelectedPatientId(null);
     setSelectedAppointmentId(null);
     setChatbotAutoSubmitSiteKey(undefined);
+    setChatbotInitialTab(undefined);
+    setChatbotAutoSubmitPreauthSiteKey(undefined);
     setIsClaimFormOpen(false);
 
     clearUrlParams(["newPatient", "appointmentId"]);
@@ -1078,6 +1092,8 @@ export default function ClaimsPage() {
           appointmentId={selectedAppointmentId ?? undefined}
           autoSubmit={mode === "direct" || !!chatbotAutoSubmitSiteKey}
           autoSubmitSiteKey={chatbotAutoSubmitSiteKey}
+          initialTab={chatbotInitialTab}
+          autoSubmitPreauth={chatbotAutoSubmitPreauthSiteKey}
           proceduresOnly={mode === "procedures"}
           onClose={closeClaim}
           onSubmit={handleClaimSubmit}