Move Add Prayer button to sidebar and implement comprehensive prayer functionality

- Integrated prayer data with Prisma database schema
- Updated API endpoints to use actual database
- Implemented AI prayer generation with Azure OpenAI
- Added user authentication for prayer creation
- Moved Add Prayer button from FAB to sidebar top
- Added prayer count tracking and user prayer status

🤖 Generated with Claude Code

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

prisma/schema.prisma

@@ -25,6 +25,7 @@ model User {
   notes           Note[]
   chatMessages    ChatMessage[]
   prayerRequests  PrayerRequest[]
+  userPrayers     UserPrayer[]
   readingHistory  ReadingHistory[]
   preferences     UserPreference[]
 
@@ -186,16 +187,23 @@ model Note {
 model PrayerRequest {
   id          String   @id @default(uuid())
   userId      String?
-  content     String   @db.Text
-  isAnonymous Boolean  @default(true)
+  title       String
+  description String   @db.Text
+  category    String   // personal, family, health, work, ministry, world
+  author      String   // Display name (can be "Anonymous" or user's name)
+  isAnonymous Boolean  @default(false)
   prayerCount Int      @default(0)
+  isActive    Boolean  @default(true)
   createdAt   DateTime @default(now())
   updatedAt   DateTime @updatedAt
 
   user        User?    @relation(fields: [userId], references: [id], onDelete: Cascade)
   prayers     Prayer[]
+  userPrayers UserPrayer[]
 
   @@index([createdAt])
+  @@index([category])
+  @@index([isActive])
 }
 
 model Prayer {
@@ -209,6 +217,20 @@ model Prayer {
   @@unique([requestId, ipAddress])
 }
 
+model UserPrayer {
+  id            String   @id @default(uuid())
+  userId        String
+  requestId     String
+  createdAt     DateTime @default(now())
+
+  user          User     @relation(fields: [userId], references: [id], onDelete: Cascade)
+  request       PrayerRequest @relation(fields: [requestId], references: [id], onDelete: Cascade)
+
+  @@unique([userId, requestId])
+  @@index([userId])
+  @@index([requestId])
+}
+
 model ReadingHistory {
   id          String   @id @default(uuid())
   userId      String