feat: add prayer frequency tracking with 1-7 slider and frequency compliance calculation

src/app/page.tsx

@@ -24,6 +24,8 @@ interface Prayer {
   prayFor?: string;
   answered?: boolean;
   answerDetails?: string;
+  prayFrequency?: number; // 1-7 times per week
+  lastPrayedFor?: string; // ISO date string
 }
 
 export default function Home() {
@@ -37,6 +39,7 @@ export default function Home() {
   const [prayFor, setPrayFor] = useState('');
   const [answered, setAnswered] = useState(false);
   const [answerDetails, setAnswerDetails] = useState('');
+  const [prayFrequency, setPrayFrequency] = useState(1); // 1-7 times per week
 
   const { user, loading: authLoading } = useAuth();
 
@@ -106,6 +109,8 @@ export default function Home() {
         prayFor: prayFor || undefined,
         answered,
         answerDetails: answerDetails || undefined,
+        prayFrequency,
+        lastPrayedFor: answered ? undefined : new Date().toISOString().split('T')[0],
       };
 
       if (editingPrayer) {
@@ -142,6 +147,7 @@ export default function Home() {
     setPrayFor(prayer.prayFor || '');
     setAnswered(prayer.answered || false);
     setAnswerDetails(prayer.answerDetails || '');
+    setPrayFrequency(prayer.prayFrequency || 1);
     setActiveTab('compose');
   };
 
@@ -221,6 +227,8 @@ export default function Home() {
           onAnsweredChange={setAnswered}
           answerDetails={answerDetails}
           onAnswerDetailsChange={setAnswerDetails}
+          prayFrequency={prayFrequency}
+          onPrayFrequencyChange={setPrayFrequency}
           onSubmit={handleSubmit}
           isEditing={!!editingPrayer}
         />