Add analytics widgets and filtering to dashboard

[NessieCanCode]

Summary

• Add KPI tiles with sparkline, gauge, bullet chart and historical/forecast usage charts
• Show top Slurm accounts and PI consumption visuals
• Introduce filter controls, paginated job table and success/failure chart in details view
• Fix chart sizing by disabling responsive resizing and constraining KPI tiles

Testing

• make check (warning: Invalid JSON in rate configuration: Expected property name or '}' in JSON at position 2)

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https://chatgpt.com/codex/tasks/task_e_6893e01927bc83248171841cac854c35