Add vaccine tabs: Completed/Upcoming/Overdue with days overdue display

- Calculate schedule from child's DOB
- Add tab navigation for vaccines
- Show days overdue for missed vaccines
- Visual indicators (opacity for completed, red border for overdue)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/app/medical/page.tsx

@@ -75,6 +75,7 @@ export default function MedicalPage() {
   const [loading, setLoading] = useState(true);
   const { childId: sessionChildId, child, loading: loadingChild } = useFamily();
   const [tab, setTab] = useState<"vaccinations" | "medicine" | "allergies" | "visits" | "illness">("vaccinations");
+  const [vaccineTab, setVaccineTab] = useState<"upcoming" | "completed" | "overdue">("upcoming");
   const [showAddDate, setShowAddDate] = useState<string | null>(null);
   const [givenDate, setGivenDate] = useState("");
 
@@ -407,6 +408,33 @@ const SUPPLEMENTS = [
   const getGivenDate = (name: string) => vaccinations.find((v) => v.vaccine_name === name && v.status === "given")?.given_date;
   const isPending = (name: string) => !isGiven(name);
 
+  // Get vaccines by status
+  const getVaccinesByStatus = (status: "upcoming" | "completed" | "overdue") => {
+    const today = new Date();
+    const todayStr = today.toISOString().split("T")[0];
+
+    return IAP_SCHEDULE.filter((v) => {
+      const dueDate = calculateDueDate(birthDate, v.weeks);
+      const given = isGiven(v.name);
+
+      if (status === "completed") return given;
+      if (status === "overdue") return !given && dueDate < todayStr;
+      if (status === "upcoming") return !given && dueDate >= todayStr;
+      return false;
+    }).sort((a, b) => a.weeks - b.weeks);
+  };
+
+  const getVaccineStatus = (name: string) => {
+    const dueDate = calculateDueDate(birthDate, IAP_SCHEDULE.find((v) => v.name === name)?.weeks || 0);
+    const today = new Date();
+    const todayStr = today.toISOString().split("T")[0];
+    const given = isGiven(name);
+
+    if (given) return "completed";
+    if (dueDate < todayStr) return "overdue";
+    return "upcoming";
+  };
+
   return (
     <div className="min-h-screen bg-gradient-to-br from-rose-50 to-amber-50">
       <div className="p-4">
@@ -450,21 +478,42 @@ const SUPPLEMENTS = [
 
         {tab === "vaccinations" && (
           <div className="space-y-2">
+            <div className="flex gap-2 mb-4 overflow-x-auto">
+              <button
+                onClick={() => setVaccineTab("upcoming")}
+                className={`px-4 py-2 rounded-xl whitespace-nowrap ${vaccineTab === "upcoming" ? "bg-rose-400 text-white" : "bg-white"}`}
+              >
+                Upcoming ({getVaccinesByStatus("upcoming").length})
+              </button>
+              <button
+                onClick={() => setVaccineTab("completed")}
+                className={`px-4 py-2 rounded-xl whitespace-nowrap ${vaccineTab === "completed" ? "bg-rose-400 text-white" : "bg-white"}`}
+              >
+                Completed ({getVaccinesByStatus("completed").length})
+              </button>
+              <button
+                onClick={() => setVaccineTab("overdue")}
+                className={`px-4 py-2 rounded-xl whitespace-nowrap ${vaccineTab === "overdue" ? "bg-red-500 text-white" : "bg-white"}`}
+              >
+                Overdue ({getVaccinesByStatus("overdue").length})
+              </button>
+            </div>
+
             <h2 className="font-semibold mb-3">IAP Schedule</h2>
             {loading ? (
               <p className="text-gray-500">Loading...</p>
             ) : (
-              IAP_SCHEDULE.filter((v) => isPending(v.name) || isGiven(v.name))
-                .sort((a, b) => a.weeks - b.weeks)
-                .map((vaccine) => {
+              getVaccinesByStatus(vaccineTab).map((vaccine) => {
                   const given = isGiven(vaccine.name);
                   const actualDate = getGivenDate(vaccine.name);
                   const dueDate = calculateDueDate(birthDate, vaccine.weeks);
+                  const status = getVaccineStatus(vaccine.name);
+                  const daysOverdue = status === "overdue" ? Math.floor((new Date().getTime() - new Date(dueDate).getTime()) / (1000 * 60 * 60 * 24)) : 0;
 
                   return (
                     <div
                       key={vaccine.name}
-                      className={`p-4 bg-white rounded-xl ${given ? "opacity-60" : ""}`}
+                      className={`p-4 bg-white rounded-xl ${status === "completed" ? "opacity-60" : ""} ${status === "overdue" ? "border-l-4 border-red-500" : ""}`}
                     >
                       <div className="flex items-center justify-between">
                         <div className="flex-1">
@@ -473,6 +522,9 @@ const SUPPLEMENTS = [
                             Due: {new Date(dueDate).toLocaleDateString()}
                             {actualDate && ` · Given: ${new Date(actualDate).toLocaleDateString()}`}
                           </div>
+                          {status === "overdue" && (
+                            <div className="text-red-500 text-sm font-medium">{daysOverdue} days overdue</div>
+                          )}
                         </div>
                         {given ? (
                           <span className="text-green-500">✓</span>