fix: Correct OAuth localhost/127.0.0.1 config and fix grapheme counting for Bluesky posts

- Fixed OAuth client configuration to properly use localhost for client_id and 127.0.0.1 for redirect_uris per RFC 8252 and ATproto spec
- Added proper grapheme counting using RichText API instead of character length
- Fixed thread splitting to account for link suffix and thread indicators in grapheme limits
- Added GOOGLE_EMBEDDING_DIMENSIONS env var to all env files
- Added clear-nodes.ts utility script for database management
- Added galaxy node detail page route

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

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

.example.env

@@ -11,6 +11,8 @@ SURREALDB_JWT_SECRET=your-secret-key-here-change-in-production
 # Google AI API Key (for Gemini embeddings and chat)
 GOOGLE_GENERATIVE_AI_API_KEY=your-google-ai-api-key
 GOOGLE_AI_MODEL=gemini-pro-latest
+GOOGLE_EMBEDDING_MODEL=gemini-embedding-001
+GOOGLE_EMBEDDING_DIMENSIONS=3072
 
 # Deepgram API Key (for voice-to-text)
 DEEPGRAM_API_KEY=your-deepgram-api-key