feat: Apple-style donation-focused landing page + Azure OpenAI fixes

Major updates:
- Replace homepage with clean, minimalist Apple-style landing page
- Focus on donation messaging and mission statement
- Add comprehensive AI chat analysis documentation
- Fix Azure OpenAI configuration with correct endpoints
- Update embedding API to use text-embedding-ada-002 (1536 dims)

Landing Page Features:
- Hero section with tagline "Every Scripture. Every Language. Forever Free"
- Mission statement emphasizing free access
- Matthew 10:8 verse highlight
- 6 feature cards (Global Library, Multilingual, Prayer Wall, AI Chat, Privacy, Offline)
- Donation CTA sections with PayPal and card options
- "Why It Matters" section with dark background
- Clean footer with navigation links

Technical Changes:
- Updated .env.local with new Azure credentials
- Fixed vector-search.ts to support separate embed API version
- Integrated AuthModal into Bible reader and prayers page
- Made prayer filters collapsible and mobile-responsive
- Changed language picker to single-select

Documentation Created:
- AI_CHAT_FIX_PLAN.md - Comprehensive implementation plan
- AI_CHAT_VERIFICATION_FINDINGS.md - Database analysis
- AI_CHAT_ANALYSIS_SUMMARY.md - Executive summary
- AI_CHAT_STATUS_UPDATE.md - Current status and next steps
- logo.svg - App logo (MenuBook icon)

Build: ✅ Successful (Next.js 15.5.3)

🤖 Generated with Claude Code

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

.env.local

@@ -12,13 +12,14 @@ NEXTAUTH_URL=https://biblical-guide.com
 NEXTAUTH_SECRET=development-secret-change-in-production
 JWT_SECRET=development-jwt-secret-change-in-production
 
-# Azure OpenAI
-AZURE_OPENAI_KEY=4DhkkXVdDOXZ7xX1eOLHTHQQnbCy0jFYdA6RPJtyAdOMtO16nZmFJQQJ99BCACYeBjFXJ3w3AAABACOGHgNC
-AZURE_OPENAI_ENDPOINT=https://azureopenaiinstant.openai.azure.com
+# Azure OpenAI (Updated 2025-10-10)
+AZURE_OPENAI_KEY=42702a67a41547919877a2ab8e4837f9
+AZURE_OPENAI_ENDPOINT=https://footprints-ai.openai.azure.com
 AZURE_OPENAI_DEPLOYMENT=gpt-4o
-AZURE_OPENAI_API_VERSION=2024-05-01-preview
-AZURE_OPENAI_EMBED_DEPLOYMENT=embed-3
-EMBED_DIMS=3072
+AZURE_OPENAI_API_VERSION=2025-01-01-preview
+AZURE_OPENAI_EMBED_DEPLOYMENT=Text-Embedding-ada-002-V2
+AZURE_OPENAI_EMBED_API_VERSION=2023-05-15
+EMBED_DIMS=1536
 BIBLE_MD_PATH=./bibles/Biblia-Fidela-limba-romana.md
 LANG_CODE=ro
 TRANSLATION_CODE=FIDELA