Implement complete bookmark functionality for Bible reading

Add both chapter-level and verse-level bookmarking capabilities:

Database Changes:
- Add ChapterBookmark table for chapter-level bookmarks
- Update schema with proper relationships to User and BibleBook models
- Maintain existing Bookmark table for verse-level bookmarks

API Endpoints:
- /api/bookmarks/chapter (GET, POST, DELETE) with check endpoint
- /api/bookmarks/verse (GET, POST, DELETE) with check and bulk-check endpoints
- JWT authentication required for all bookmark operations
- Multilingual error messages (Romanian/English)

Frontend Implementation:
- Chapter bookmark button in Bible page header with visual state feedback
- Individual verse bookmark icons with hover-to-reveal UI
- Highlighted background for bookmarked verses
- Efficient bulk checking for verse bookmarks per chapter
- Real-time UI updates without page refresh

🤖 Generated with [Claude Code](https://claude.ai/code)

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

app/api/bookmarks/verse/check/route.ts

@@ -0,0 +1,73 @@
+import { NextResponse } from 'next/server'
+import { getUserFromToken } from '@/lib/auth'
+import { prisma } from '@/lib/db'
+
+export const runtime = 'nodejs'
+
+function getErrorMessages(locale: string = 'ro') {
+  const messages = {
+    ro: {
+      unauthorized: 'Nu ești autentificat',
+      bookmarkRequired: 'Informațiile bookmark-ului sunt obligatorii',
+      bookmarkError: 'Eroare la verificarea bookmark-ului'
+    },
+    en: {
+      unauthorized: 'Unauthorized',
+      bookmarkRequired: 'Bookmark information is required',
+      bookmarkError: 'Error checking bookmark'
+    }
+  }
+  return messages[locale as keyof typeof messages] || messages.ro
+}
+
+// GET - Check if verse is bookmarked
+export async function GET(request: Request) {
+  try {
+    const url = new URL(request.url)
+    const locale = url.searchParams.get('locale') || 'ro'
+    const verseId = url.searchParams.get('verseId')
+    const messages = getErrorMessages(locale)
+
+    // Get token from authorization header
+    const authHeader = request.headers.get('authorization')
+    const token = authHeader?.replace('Bearer ', '')
+
+    if (!token) {
+      return NextResponse.json({ error: messages.unauthorized }, { status: 401 })
+    }
+
+    // Verify token and get user
+    const user = await getUserFromToken(token)
+    if (!user) {
+      return NextResponse.json({ error: messages.unauthorized }, { status: 401 })
+    }
+
+    // Validate input
+    if (!verseId) {
+      return NextResponse.json({ error: messages.bookmarkRequired }, { status: 400 })
+    }
+
+    // Check if bookmark exists
+    const bookmark = await prisma.bookmark.findUnique({
+      where: {
+        userId_verseId: {
+          userId: user.id,
+          verseId: verseId
+        }
+      }
+    })
+
+    return NextResponse.json({
+      isBookmarked: !!bookmark,
+      bookmark: bookmark || null
+    })
+
+  } catch (error) {
+    console.error('Verse bookmark check error:', error)
+    const url = new URL(request.url)
+    const locale = url.searchParams.get('locale') || 'ro'
+    const messages = getErrorMessages(locale)
+
+    return NextResponse.json({ error: messages.bookmarkError }, { status: 500 })
+  }
+}