fix: Add localhost host binding to Vite config and index fix script

- Add host: 'localhost' to vite.config.js to ensure consistent IP
- Add scripts/fix-indexes.js for database index verification
- Add routes/llmTest.js for LLM testing endpoint

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

vite.config.js

@@ -4,6 +4,7 @@ import react from '@vitejs/plugin-react'
 export default defineConfig({
   plugins: [react()],
   server: {
+    host: 'localhost',
     port: 5173,
     open: true
   }