Allocations: show combined block identifier with capacity

[smagala]

Epic: #31

Description

Display the full block identifier (shoulder + blade pattern) and add a capacity column to the Allocations table.

Changes

• client/src/pages/Allocations.tsx:
  • Column header "Shoulder" -> "Block"
  • Chip label: allocation.shoulder -> allocation.shoulder.allocation.blade_pattern
  • Copy handler copies the combined identifier
  • Add "Capacity" column showing allocation.cycle_length.toLocaleString()
  • Update colSpan for empty state row (5 -> 6)

Estimate

1 story point

[smagala]

Retrospective

Upgrades to original plan

The Allocations table scope expanded well beyond the original "show combined block identifier with capacity" ticket:

• Added Purpose column (truncated with tooltip)
• Added External toggle switch (disabled when minter active)
• Added Actions column with Initialize Minter button, Minter Active chip, and External chip
• Added Initialize Minter dialog with generator type selection (LCG/Sequential)
• Added Snackbar feedback for toggle and init actions
• Table went from 6 columns to 9

Emerging requirements

The external use management feature emerged as a natural companion to showing allocations — users need to distinguish between internally and externally managed identifier blocks, and the Allocations page is the right place to control that.