fix(techniques): remove broken validate/reject buttons from associated tests

The tick/cross buttons navigated to /tests/:id/validate and /tests/:id/reject
which are non-existent routes (catch-all redirected to dashboard).
Removed both buttons; the View (FileText) icon is the correct entry point
to the test detail page where the full workflow lives.

frontend/src/pages/TechniqueDetailPage.tsx

@@ -12,8 +12,6 @@ import {
   FileText,
   ExternalLink,
   Plus,
-  Check,
-  X,
   AlertTriangle,
   BookOpen,
   FlaskConical,
@@ -300,7 +298,6 @@ export default function TechniqueDetailPage() {
                       <span className="text-gray-400">{formatDate(test.created_at)}</span>
                     </td>
                     <td className="py-3 pl-4">
-                      <div className="flex items-center gap-2">
                       <button
                         onClick={() => navigate(`/tests/${test.id}`)}
                         className="rounded p-1 text-gray-400 hover:bg-gray-800 hover:text-cyan-400"
@@ -308,25 +305,6 @@ export default function TechniqueDetailPage() {
                       >
                         <FileText className="h-4 w-4" />
                       </button>
-                        {canReview && test.state === "draft" && (
-                          <>
-                            <button
-                              onClick={() => navigate(`/tests/${test.id}/validate`)}
-                              className="rounded p-1 text-gray-400 hover:bg-green-900/50 hover:text-green-400"
-                              title="Validate"
-                            >
-                              <Check className="h-4 w-4" />
-                            </button>
-                            <button
-                              onClick={() => navigate(`/tests/${test.id}/reject`)}
-                              className="rounded p-1 text-gray-400 hover:bg-red-900/50 hover:text-red-400"
-                              title="Reject"
-                            >
-                              <X className="h-4 w-4" />
-                            </button>
-                          </>
-                        )}
-                      </div>
                     </td>
                   </tr>
                 ))}