feat: auto-refresh via Stimulus for dashboard, jobs, processes, and history

[eclectic-coding]

Summary

• Adds RefreshController — a Stimulus controller that polls the current URL on a configurable interval, swapping the turbo-frame content via fetch + DOMParser; pauses when the tab is hidden or any checkbox is checked; resumes immediately on tab focus
• Wraps four views in turbo frames with refresh wired up:
  • Dashboard (sqw-dashboard) — uses dashboard_refresh_interval (default 5 s)
  • Jobs index (sqw-jobs-filter) — converts existing raw <turbo-frame> to helper; uses default_refresh_interval (default 10 s)
  • Processes (sqw-processes) — uses default_refresh_interval
  • History (sqw-history-table) — uses default_refresh_interval
• Adds three new config attributes: dashboard_refresh_interval, default_refresh_interval, search_results_limit (reserved for a future search feature)

Configuration

SolidStackWeb.configure do |config|
  config.dashboard_refresh_interval = 5_000   # ms (default: 5000)
  config.default_refresh_interval   = 10_000  # ms (default: 10000)
  config.search_results_limit       = 25      # (default: 25)
end

Test plan

• Dashboard stats update automatically without full page reload
• Jobs table refreshes; refresh pauses when a checkbox is checked
• Processes list refreshes
• History table refreshes
• Switching browser tabs pauses refresh; returning resumes it
• Full suite: bundle exec rake

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