feat: add Preauth Followup section to claims page

Adds From/To date pickers and CCA PA / United PA / Tufts PA / All recent PA
buttons above the Upload claim documents section; button logic is stubbed
for now.

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

@@ -7,6 +7,12 @@ import {
   CardContent,
   CardDescription,
 } from "@/components/ui/card";
+import { Button } from "@/components/ui/button";
+import { Label } from "@/components/ui/label";
+import { Calendar as CalendarIcon } from "lucide-react";
+import { Calendar } from "@/components/ui/calendar";
+import { Popover, PopoverContent, PopoverTrigger } from "@/components/ui/popover";
+import { formatLocalDate } from "@/utils/dateUtils";
 import { ClaimForm } from "@/components/claims/claim-form";
 import { useToast } from "@/hooks/use-toast";
 import { useAuth } from "@/hooks/use-auth";
@@ -48,6 +54,12 @@ export default function ClaimsPage() {
   const [previewOpen, setPreviewOpen] = useState(false);
   const [previewPdfId, setPreviewPdfId] = useState<number | string | null>(null);
   const [previewFallbackFilename, setPreviewFallbackFilename] = useState<string | null>(null);
+
+  // Preauth followup state
+  const [preauthFollowupFrom, setPreauthFollowupFrom] = useState<Date | undefined>(undefined);
+  const [preauthFollowupTo, setPreauthFollowupTo] = useState<Date | undefined>(undefined);
+  const [preauthFollowupFromOpen, setPreauthFollowupFromOpen] = useState(false);
+  const [preauthFollowupToOpen, setPreauthFollowupToOpen] = useState(false);
   const dispatch = useAppDispatch();
   const { status, message, show } = useAppSelector(
     (state) => state.seleniumTasks.claimSubmit
@@ -1138,6 +1150,115 @@ export default function ClaimsPage() {
         </CardContent>
       </Card>
 
+      {/* Preauth Followup Section */}
+      <Card>
+        <CardHeader>
+          <CardTitle>Preauth Followup</CardTitle>
+        </CardHeader>
+        <CardContent className="space-y-4">
+          <div className="flex flex-wrap gap-4 items-center">
+            <div className="flex items-center gap-2">
+              <Label className="flex items-center">From</Label>
+              <Popover
+                open={preauthFollowupFromOpen}
+                onOpenChange={setPreauthFollowupFromOpen}
+              >
+                <PopoverTrigger asChild>
+                  <Button
+                    variant="outline"
+                    className="w-[140px] justify-start text-left font-normal"
+                  >
+                    <CalendarIcon className="mr-2 h-4 w-4" />
+                    {preauthFollowupFrom
+                      ? formatLocalDate(preauthFollowupFrom)
+                      : "Pick Date"}
+                  </Button>
+                </PopoverTrigger>
+                <PopoverContent className="w-auto">
+                  <Calendar
+                    mode="single"
+                    selected={preauthFollowupFrom}
+                    onSelect={(date) => {
+                      setPreauthFollowupFrom(date);
+                      setPreauthFollowupFromOpen(false);
+                    }}
+                    onClose={() => setPreauthFollowupFromOpen(false)}
+                  />
+                </PopoverContent>
+              </Popover>
+            </div>
+            <div className="flex items-center gap-2">
+              <Label className="flex items-center">To</Label>
+              <Popover
+                open={preauthFollowupToOpen}
+                onOpenChange={setPreauthFollowupToOpen}
+              >
+                <PopoverTrigger asChild>
+                  <Button
+                    variant="outline"
+                    className="w-[140px] justify-start text-left font-normal"
+                  >
+                    <CalendarIcon className="mr-2 h-4 w-4" />
+                    {preauthFollowupTo
+                      ? formatLocalDate(preauthFollowupTo)
+                      : "Pick Date"}
+                  </Button>
+                </PopoverTrigger>
+                <PopoverContent className="w-auto">
+                  <Calendar
+                    mode="single"
+                    selected={preauthFollowupTo}
+                    onSelect={(date) => {
+                      setPreauthFollowupTo(date);
+                      setPreauthFollowupToOpen(false);
+                    }}
+                    onClose={() => setPreauthFollowupToOpen(false)}
+                  />
+                </PopoverContent>
+              </Popover>
+            </div>
+          </div>
+          <div className="flex flex-wrap gap-2 items-center">
+            <Button
+              type="button"
+              variant="outline"
+              onClick={() => {
+                // TODO: define CCA PA followup logic
+              }}
+            >
+              CCA PA
+            </Button>
+            <Button
+              type="button"
+              variant="outline"
+              onClick={() => {
+                // TODO: define United PA followup logic
+              }}
+            >
+              United PA
+            </Button>
+            <Button
+              type="button"
+              variant="outline"
+              onClick={() => {
+                // TODO: define Tufts PA followup logic
+              }}
+            >
+              Tufts PA
+            </Button>
+            <Button
+              type="button"
+              variant="outline"
+              onClick={() => {
+                // TODO: define All recent PA followup logic
+              }}
+            >
+              All recent PA
+            </Button>
+          </div>
+        </CardContent>
+      </Card>
+
       {/* File Upload Zone */}
       <ClaimDocumentsUploadMultiple />