fix: auto-inject AGENTMEMORY_SECRET into viewer so dashboard authenticates without manual token entry

fix: use correct dataset repo (agentmemory-python-data) and fix second-brain default path for Linux

Clean up legacy TS/Node files, fix Dolt backup path sync bug, and update CSP connect-src header

Update CSP frame-ancestors to allow Hugging Face iframe embedding

Allow serving viewer HTML without auth header, facilitating client-side token prompt

Initialize Hugging Face Space deployment for AgentMemory Python (clean without assets)