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/components/claims/claim-form.tsx

@@ -82,6 +82,10 @@ interface ClaimFormProps {
   autoSubmit?: boolean;
   /** When set, autoSubmit triggers this insurance's Selenium worker instead of MH */
   autoSubmitSiteKey?: string;
+  /** When set, opens this tab by default (e.g. "preauth") */
+  initialTab?: string;
+  /** When set, auto-triggers the matching preauth Selenium handler (siteKey value) */
+  autoSubmitPreauth?: string;
   /** When true: form saves to AppointmentProcedure (Select Procedures flow), shows only Save button */
   proceduresOnly?: boolean;
   onSubmit: (data: ClaimFormData) => Promise<Claim>;
@@ -107,6 +111,8 @@ export function ClaimForm({
   appointmentId,
   autoSubmit,
   autoSubmitSiteKey,
+  initialTab,
+  autoSubmitPreauth,
   proceduresOnly = false,
   onHandleAppointmentSubmit,
   onHandleUpdatePatient,
@@ -128,6 +134,7 @@ export function ClaimForm({
 
   const [prefillDone, setPrefillDone] = useState(false);
   const autoSubmittedRef = useRef(false);
+  const preauthAutoSubmittedRef = useRef(false);
   // Read chatbot-requested rendering provider synchronously at mount (before any effects run)
   // so the npiProviders effect always sees it, even when the provider list is already cached.
   const [chatbotRenderingProvider] = useState<string | null>(() => {
@@ -568,6 +575,50 @@ export function ClaimForm({
     } catch {}
   }, []);
 
+  // Prefill service lines and service date from chatbot preauth flow, then map prices
+  useEffect(() => {
+    const raw = sessionStorage.getItem("chatbot_preauth_prefill");
+    if (!raw) return;
+    try {
+      const { codes, serviceDate, siteKey } = JSON.parse(raw) as {
+        codes: { code: string; description: string; toothNumber?: string; toothSurface?: string; quad?: string }[];
+        serviceDate?: string;
+        siteKey?: string;
+      };
+      sessionStorage.removeItem("chatbot_preauth_prefill");
+      if (!codes?.length) return;
+
+      if (serviceDate) {
+        try {
+          const d = parseLocalDate(serviceDate);
+          setServiceDateValue(d);
+          setServiceDate(formatLocalDate(d));
+        } catch {}
+      }
+
+      setForm((prev) => {
+        const date = serviceDate ? serviceDate : prev.serviceDate;
+        const insuranceSiteKey = siteKey ? siteKey.replace(/_/g, "").toLowerCase() : prev.insuranceSiteKey;
+        const updatedLines = [...prev.serviceLines];
+        codes.forEach((c, i) => {
+          if (i < updatedLines.length) {
+            updatedLines[i] = {
+              ...updatedLines[i]!,
+              procedureCode: c.code,
+              procedureDate: date,
+              ...(c.toothNumber ? { toothNumber: c.toothNumber } : {}),
+              ...(c.toothSurface ? { toothSurface: c.toothSurface } : {}),
+              ...(c.quad ? { quad: c.quad } : {}),
+            };
+          }
+        });
+        const filled = { ...prev, insuranceSiteKey, serviceLines: updatedLines };
+        return mapPricesForForm({ form: filled, patientDOB: "", insuranceSiteKey });
+      });
+      setPrefillDone(true);
+    } catch {}
+  }, []);
+
   // Restore NPI provider from saved procedures when npiProviders list loads after 2b
   useEffect(() => {
     if (!savedProcNpiId || !npiProviders.length) return;
@@ -1891,6 +1942,26 @@ export function ClaimForm({
     }
   }, [autoSubmit, autoSubmitSiteKey, prefillDone, isFormReady]);
 
+  // Auto-trigger preauth Selenium handler when autoSubmitPreauth is set
+  useEffect(() => {
+    if (!autoSubmitPreauth) return;
+    if (!prefillDone) return;
+    if (!isFormReady) return;
+    if (preauthAutoSubmittedRef.current) return;
+    preauthAutoSubmittedRef.current = true;
+
+    const key = autoSubmitPreauth.toLowerCase();
+    if (key === "tufts_sco" || key === "tuftsco" || key === "tufts sco") {
+      handleTuftsSCOPreAuth();
+    } else if (key === "cca") {
+      handleCCAPreAuth();
+    } else if (key === "united_sco" || key === "unitedco" || key === "dentalhub") {
+      handleUnitedDHPreAuth();
+    } else {
+      handleMHPreAuth();
+    }
+  }, [autoSubmitPreauth, prefillDone, isFormReady]);
+
   // overlay click handler (close when clicking backdrop)
   const onOverlayMouseDown = (e: React.MouseEvent<HTMLDivElement>) => {
     // only close if clicked the backdrop itself (not inner modal)
@@ -1903,6 +1974,7 @@ export function ClaimForm({
     return () => {
       // reset when ClaimForm unmounts (modal closes)
       autoSubmittedRef.current = false;
+      preauthAutoSubmittedRef.current = false;
       setPrefillDone(false);
     };
   }, []);
@@ -1913,7 +1985,7 @@ export function ClaimForm({
       onMouseDown={onOverlayMouseDown}
     >
       <Card className="w-[90vw] h-[90vh] max-w-none overflow-auto bg-white relative">
-        <Tabs defaultValue="claim">
+        <Tabs defaultValue={initialTab ?? "claim"}>
           <CardHeader className="sticky top-0 z-20 pb-2 border-b bg-white/95 backdrop-blur-sm">
             <div className="flex flex-row items-center justify-between mb-2">
               <CardTitle className="text-xl font-bold">