feat: version 3.0.0 -- Correcciones de auditoria de seguridad, accesibilidad y redundancia

Permisos (superadmin, viewer, busqueda, tareas recurrentes), bootstrap atomico,
revocacion de JWT por version de sesion (028), control optimista de edicion (029),
logo sin SVG + CSP, ingesta endurecida, correos escapados, borradores, paginacion
de proyectos, accesibilidad de dialogos/controles e i18n.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/src/components/ListView.jsx

@@ -45,8 +45,8 @@ export function ListView({ columns, rows, searchValue, getSearchHaystack, onRowC
           <tr>
             {dragEnabled && <th style={{ width: 28 }} />}
             {columns.map((col) => (
-              <th key={col.key} onClick={() => col.sortable !== false && toggleSort(col.key)}>
-                {col.label}{sort.key === col.key ? (sort.dir === 1 ? ' ▲' : ' ▼') : ''}
+              <th key={col.key} aria-sort={col.sortable !== false && sort.key === col.key ? (sort.dir === 1 ? 'ascending' : 'descending') : undefined}>
+                {col.sortable === false ? col.label : <button type="button" className="table-sort-button" onClick={() => toggleSort(col.key)}>{col.label}{sort.key === col.key ? (sort.dir === 1 ? ' ▲' : ' ▼') : ''}</button>}
               </th>
             ))}
             {rowActions && <th style={{ width: 40 }} />}
@@ -57,6 +57,8 @@ export function ListView({ columns, rows, searchValue, getSearchHaystack, onRowC
             <tr
               key={getRowKey(row)}
               onClick={() => onRowClick?.(row)}
+              tabIndex={onRowClick ? 0 : undefined}
+              onKeyDown={(event) => { if (onRowClick && event.target === event.currentTarget && (event.key === 'Enter' || event.key === ' ')) { event.preventDefault(); onRowClick(row); } }}
               className={dragEnabled && isDragging(getRowKey(row)) ? 'dragging' : ''}
               {...(dragEnabled ? getRowProps(row) : {})}
             >
@@ -71,7 +73,7 @@ export function ListView({ columns, rows, searchValue, getSearchHaystack, onRowC
               {rowActions && (
                 <td onClick={(e) => e.stopPropagation()}>
                   <Flyout trigger={({ onClick }) => (
-                    <button className="icon-btn row-menu-btn" onClick={onClick}><MoreVertical /></button>
+                    <button className="icon-btn row-menu-btn" aria-label={t('common_actions')} onClick={onClick}><MoreVertical /></button>
                   )}>
                     {rowActions(row).map((action, i) => (
                       <FlyoutItem key={i} icon={action.icon} danger={action.danger} onClick={action.onClick}>