Resumen de los cambios del fix de navegación:

LibraryPage.tsx:778 — reemplazó useSearch({ from: '/' }) por useRouterState + URLSearchParams. Ahora funciona tanto desde / como desde /library.
WorkspacePage.tsx:206-209 — handleBack() navega a /library (con o sin ?org=uuid) en lugar de /.
workspace-back-button.test.ts — backTo actualizado a /library y /library?org=... en los 6 tests.
library-ui.test.tsx — mock de useSearch → useRouterState (devuelve { location: { search: '' } }).

src/features/library/LibraryPage.tsx

@@ -1,5 +1,5 @@
 import { useEffect, useState, useRef, useCallback } from 'react'
-import { useNavigate, useSearch } from '@tanstack/react-router'
+import { useNavigate, useRouterState } from '@tanstack/react-router'
 import {
   Upload, Search, Plus, Building2, FolderX, GitBranch,
   Clock, TrendingUp, BarChart2, FileX2, X, Settings,
@@ -775,7 +775,8 @@ export function LibraryPage() {
   const navigate = useNavigate()
   const { load, processes, groups, settings, isLoading } = useLibraryStore()
   const { user, isProfileLoaded } = useAuth()
-  const { org: orgParam } = useSearch({ from: '/' }) as { org?: string }
+  const searchStr = useRouterState({ select: (s) => s.location.search })
+  const orgParam = new URLSearchParams(searchStr).get('org')
   const [view, setView] = useState<'home' | 'group'>('home')
   const [activeGroupId, setActiveGroupId] = useState<string | null>(null)
   const [transitioning, setTransitioning] = useState(false)

src/features/workspace/WorkspacePage.tsx

@@ -203,9 +203,9 @@ export function WorkspacePage() {
   function handleBack() {
     const orgId = currentProcess?.orgId
     if (orgId && !isClientRole) {
-      void navigate({ to: '/', search: { org: orgId } })
+      void navigate({ to: '/library', search: { org: orgId } as never })
     } else {
-      void navigate({ to: '/' })
+      void navigate({ to: '/library' })
     }
   }
 

src/router.tsx

@@ -103,6 +103,12 @@ const indexRoute = createRoute({
   component: LibraryPage,
 })
 
+const libraryRoute = createRoute({
+  getParentRoute: () => rootRoute,
+  path: '/library',
+  component: LibraryPage,
+})
+
 const importRoute = createRoute({
   getParentRoute: () => rootRoute,
   path: '/import',
@@ -170,6 +176,7 @@ const routeTree = rootRoute.addChildren([
   resetPasswordRoute,
   confirmInviteRoute,
   indexRoute,
+  libraryRoute,
   importRoute,
   workspaceRoute,
   reportRoute,