fix(ui): handle pools with unlimited (-1) slots in UI components (#62831) (#63872)

* fix(ui): handle pools with unlimited (-1) slots in UI components

When a pool has slots set to -1 (unlimited), the UI now properly
handles this case instead of showing broken bars or negative values.

Changes:
- PoolBar: render infinity symbol and proportional bar for unlimited pools
- PoolBarCard: display ∞ instead of -1 in pool header
- PoolSummary: correctly aggregate slots when any pool is unlimited
- PoolForm: set min to -1 and add helper text explaining the convention

Closes: #61115

* fix(ui): simplify PoolBar unlimited slots computation per review



* fix(ui): rename short identifier in PoolBar filter/reduce



* fix(ui): resolve linting and typing errors caught by prek

- Fix indentation in PoolBar.tsx map callback (formatting)
- Fix JSX line break in PoolBarCard.tsx (formatting)
- Widen slotType cast to TaskInstanceState | "open" since
  open_slots produces "open" which is not a TaskInstanceState
- Add explicit cast for StateIcon prop where "open" is already
  filtered out by infoSlots



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Co-authored-by: Antonio Mello <ajgcvm@gmail.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>