Add 11 major features for caregiver health management

Features added:
- Emergency Info Card: Full-screen emergency view with patient info
- Refill Tracker: Track pill counts with auto-decrement on dose
- Activity Feed: View caregiver activity with filtering
- Symptom Tracker: Log symptoms with severity and offline sync
- Print Views: Daily meds, appointments, doctor visit summaries
- iCal Export: Calendar subscription for appointments
- PDF Export: Medical summary for doctor visits
- Calendar View: Monthly calendar for appointments
- Appointment Preparation: Checklist for upcoming appointments
- Medication Reminders: PWA push notifications with quiet hours

Bug fixes:
- Fix invite workflow: Register/login now properly redirect back
- Add undo for doctor questions (can unmark "asked" questions)
- Fix API route type annotations for Next.js 14 compatibility
- Add Suspense boundary for useSearchParams in login/register

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/medications/RefillAlert.tsx

@@ -0,0 +1,50 @@
+'use client'
+
+import { AlertTriangle } from 'lucide-react'
+import { useRouter } from 'next/navigation'
+
+interface RefillAlertProps {
+  medications: {
+    id: string
+    name: string
+    pillCount: number | null
+    refillThreshold: number | null
+  }[]
+}
+
+export function RefillAlert({ medications }: RefillAlertProps) {
+  const router = useRouter()
+
+  const lowMeds = medications.filter(
+    m => m.pillCount !== null && m.refillThreshold !== null && m.pillCount <= m.refillThreshold
+  )
+
+  if (lowMeds.length === 0) {
+    return null
+  }
+
+  return (
+    <div className="bg-orange-50 border border-orange-200 rounded-lg p-4">
+      <div className="flex items-start gap-3">
+        <AlertTriangle className="w-5 h-5 text-orange-600 mt-0.5 flex-shrink-0" />
+        <div className="flex-1">
+          <p className="font-semibold text-orange-800">
+            {lowMeds.length === 1 ? 'Medication running low' : `${lowMeds.length} medications running low`}
+          </p>
+          <ul className="mt-1 space-y-1">
+            {lowMeds.map(med => (
+              <li key={med.id}>
+                <button
+                  onClick={() => router.push(`/meds/${med.id}`)}
+                  className="text-sm text-orange-700 hover:text-orange-900 hover:underline"
+                >
+                  {med.name} - {med.pillCount} pills left
+                </button>
+              </li>
+            ))}
+          </ul>
+        </div>
+      </div>
+    </div>
+  )
+}