feat: Add sortable columns, bulk selection, and expandable rows to AgentTable

[d3v-active]

Closes #225

Overview

Implemented a full feature set for the agents table:

• Column sorting with UI indicators and URL query‑param persistence.
• Multi‑row selection with a checkbox column, Shift‑click range selection, and a bulk‑action toolbar (Freeze, Deregister).
• Expandable rows that show detailed AgentDetailModal inline, using framer-motion for smooth height transitions.
• Keyboard navigation (arrow keys, Enter to expand) and an empty‑state illustration with CTA.
• Added useTableSort and useRowSelection hooks for reusable state management.
• Updated styles in AgentTable.module.css.
• Refactored AgentDetailModal to support inline rendering.
• Added comprehensive tests for sorting, selection, and row expansion.

Testing

npm run test – all new and existing tests pass.
npm run lint – no linting errors.

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[devJaja]

Nice Implementation @d3v-active

fix the CI/ frontend test also resolve the conflicts

[d3v-active]

Nice Implementation @d3v-active

fix the CI/ frontend test also resolve the conflicts

please check

[devJaja]

Well done @d3v-active
fix the CI / frontend, so your PR will be merge