Add web dashboard for managing data transfer jobs

[fluidnumerics-joe]

Summary

• Adds a FastAPI-based web dashboard for creating and monitoring xfer data transfer jobs
• Implements Google Workspace SSO authentication with configurable domain restrictions
• Admin-controlled settings (shards, concurrency, partitions, resources) separate from user inputs
• Two-stage job submission keeps manifest creation off the login node (runs as Slurm batch job)
• Real-time progress monitoring via state directory polling
• Log streaming via Server-Sent Events
• Job cancellation support

New Files

• src/xfer/dashboard/ - Dashboard package (FastAPI app, services, templates)
• docs/dashboard.md - Comprehensive documentation
• dashboard.yaml.example - Example configuration file

Installation

pip install -e ".[dashboard]"

Test plan

• Install with dashboard extras and verify dependencies resolve
• Create dashboard.yaml from example and configure Google OAuth
• Run xfer-dashboard and verify server starts
• Test Google SSO login flow with allowed domain
• Test domain restriction (user from non-allowed domain should be rejected)
• Create a test transfer job and verify manifest Slurm job is submitted
• Monitor job progress and verify shard completion updates
• Test log streaming for manifest and shard logs
• Test job cancellation

🤖 Generated with Claude Code