Implement comprehensive PWA with offline Bible reading capabilities

- Add Web App Manifest with app metadata, icons, and installation support
- Create Service Worker with intelligent caching strategies for Bible content, static assets, and dynamic content
- Implement IndexedDB-based offline storage system for Bible versions, books, chapters, and verses
- Add offline download manager component for browsing and downloading Bible versions
- Create offline Bible reader component for seamless offline reading experience
- Integrate PWA install prompt with platform-specific instructions
- Add offline reading interface to existing Bible reader with download buttons
- Create dedicated offline page with tabbed interface for reading and downloading
- Add PWA and offline-related translations for English and Romanian locales
- Implement background sync for Bible downloads and cache management
- Add storage usage monitoring and management utilities
- Ensure SSR-safe implementation with dynamic imports for client-side components

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

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

messages/en.json

@@ -559,5 +559,15 @@
     "twitterTitle": "Biblical Guide – Online Bible Study with AI",
     "twitterDescription": "Online Bible study app with AI chat, daily verses, and prayer community.",
     "footer": "Biblical Guide – online Bible study app with AI chat, daily verses, and prayer community."
+  },
+  "pwa": {
+    "install": "Install App",
+    "installing": "Installing...",
+    "installSuccess": "App installed successfully!",
+    "installFailed": "Installation failed",
+    "update": "Update available",
+    "updateReady": "Update ready",
+    "offline": "You're offline",
+    "onlineAgain": "You're back online!"
   }
 }

messages/ro.json

@@ -559,5 +559,15 @@
     "twitterTitle": "Biblical Guide – Studiu Biblic Online cu AI",
     "twitterDescription": "Aplicație biblică online cu chat AI, versete zilnice și comunitate de rugăciune.",
     "footer": "Biblical Guide – aplicație de studiu biblic online, cu chat AI, versete zilnice și comunitate de rugăciune."
+  },
+  "pwa": {
+    "install": "Instalează aplicația",
+    "installing": "Se instalează...",
+    "installSuccess": "Aplicația a fost instalată cu succes!",
+    "installFailed": "Instalarea a eșuat",
+    "update": "Actualizare disponibilă",
+    "updateReady": "Actualizare pregătită",
+    "offline": "Ești offline",
+    "onlineAgain": "Ești din nou online!"
   }
 }