Add sitemap and robots.txt, update home page stats to static values, and fix prayer language detection

- Create sitemap.xml with internationalized routes and proper SEO attributes
- Create robots.txt with appropriate crawling rules for public/private content
- Update home page stats to show static values (1,416 Bible versions, 17M+ verses)
- Remove live stats API calls to eliminate loading delays
- Add /api/stats endpoint for potential future use
- Fix Romanian prayers incorrectly tagged as English in database
- Add missing AZURE_OPENAI_DEPLOYMENT to .env.example
- Update translation keys for Bible versions stat
- Add sample English prayer requests to populate prayer wall

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

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

messages/en.json

@@ -63,7 +63,7 @@
       }
     },
     "stats": {
-      "books": "Biblical books",
+      "bibleVersions": "Bible versions",
       "verses": "Verses",
       "aiAvailable": "AI Chat available"
     },
@@ -257,6 +257,7 @@
       "chapters": "chapters",
       "addBookmark": "Add bookmark",
       "removeBookmark": "Remove bookmark",
+      "loginToBookmark": "Login to bookmark",
       "bookmarkVerse": "Bookmark verse",
       "removeVerseBookmark": "Remove verse bookmark",
       "toggleFullscreen": "Toggle fullscreen",
@@ -268,6 +269,30 @@
     "prayers": {
       "title": "Prayers",
       "subtitle": "Share prayers and pray together with the community",
+      "viewModes": {
+        "private": "My private prayers",
+        "public": "Public prayer wall"
+      },
+      "chips": {
+        "private": "Private",
+        "public": "Public"
+      },
+      "languageFilter": {
+        "title": "Languages",
+        "helper": "Choose which languages to include. Your current language stays selected.",
+        "options": {
+          "en": "English",
+          "ro": "Romanian"
+        }
+      },
+      "alerts": {
+        "privateInfo": "Private prayers are visible only to you. Turn on public sharing to post them on the prayer wall.",
+        "publicInfo": "Browsing public prayers for your selected language. Add more languages from the filter."
+      },
+      "empty": {
+        "private": "You have no private prayers yet. Create one to start your prayer journal.",
+        "public": "No public prayers match the selected filters yet."
+      },
       "addRequest": "Add prayer request",
       "anonymous": "Anonymous",
       "prayFor": "Pray for this",
@@ -299,7 +324,10 @@
         "descriptionLabel": "Description",
         "placeholder": "Describe your prayer request...",
         "cancel": "Cancel",
-        "submit": "Add prayer"
+        "submit": "Add prayer",
+        "makePublic": "Share on the public prayer wall",
+        "visibilityPrivate": "Private prayers stay visible only to you.",
+        "visibilityPublic": "Public prayers are visible to everyone on the prayer wall."
       },
       "samples": {
         "item1": {