Fix all ESLint errors: remove unused imports, replace any types

- Remove ~60 unused imports and variables across 88 files
- Replace ~80 `any` type annotations with proper types (unknown,
  Record<string, unknown>, or specific types)
- Prefix unused callback args with underscore
- Fix unescaped JSX entities
- Lint now passes cleanly (0 errors, 2 intentional img warnings)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/components/shared/data-table.tsx

@@ -6,9 +6,7 @@ import {
   getCoreRowModel,
   useReactTable,
   type ColumnDef,
-  type SortingState,
   type RowSelectionState,
-  type PaginationState,
 } from '@tanstack/react-table';
 import { ArrowDown, ArrowUp, ArrowUpDown, Loader2 } from 'lucide-react';