feat: add pool rebalance and decommission pages

[cxymds]

Pull Request

Description

Add the current pool rebalance and pool decommission UI flows, including navigation entry points, permission mapping, API view-model normalization, and localized labels.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Code refactoring
• Performance improvement
• Test improvements
• Security fix

Testing

• Unit tests added/updated
• Manual testing completed

source ~/.nvm/nvm.sh && nvm use v22 && pnpm install --frozen-lockfile
source ~/.nvm/nvm.sh && nvm use v22 && pnpm run type-check
source ~/.nvm/nvm.sh && nvm use v22 && pnpm run lint
source ~/.nvm/nvm.sh && nvm use v22 && pnpm run format:check
source ~/.nvm/nvm.sh && nvm use v22 && node --experimental-strip-types --test tests/lib/pool-operations.test.js

Lint currently reports one pre-existing warning in components/object/preview-modal.tsx for @next/next/no-img-element.

Checklist

• Code follows the project's style guidelines
• Self-review completed
• TypeScript types are properly defined
• All commit messages are in English (Conventional Commits)
• All existing tests pass
• No new dependencies added, or they are justified

Related Issues

Closes #

Screenshots (if applicable)

Not included.

Additional Notes

• Adds /rebalance and /pool-decommission pages plus shared pool overview and operation helpers.
• Wires navigation, icon mapping, and console permission parsing for the new pages.
• Updates locale bundles with the strings needed by the new rebalance and decommission flows.