diff --git a/app/src/hooks/usePersistentState.ts b/app/src/hooks/usePersistentState.ts
index 3a2bb45..65491dd 100644
--- a/app/src/hooks/usePersistentState.ts
+++ b/app/src/hooks/usePersistentState.ts
@@ -1,4 +1,3 @@
-import { useState, useEffect } from 'react';
 import { create } from 'zustand';
 
 interface PersistentStore {
diff --git a/app/src/pages/BarSelectorModule.tsx b/app/src/pages/BarSelectorModule.tsx
index a515925..fccdb5b 100644
--- a/app/src/pages/BarSelectorModule.tsx
+++ b/app/src/pages/BarSelectorModule.tsx
@@ -14,7 +14,6 @@ import { WindParametersSummary } from '@/components/WindParametersSummary';
 import { EducationalManual } from '@/components/EducationalManual';
 import { SaveModuleDialog } from '@/components/SaveModuleDialog';
 import { exportGenericToPDF, type GenericPDFSection } from '../lib/export-generic-pdf';
-import { usePersistentState } from '@/hooks/usePersistentState';
 
 const BarSelectorModule: React.FC = () => {
   const { vk, q } = useWindStore();
diff --git a/app/src/pages/BridgeModule.tsx b/app/src/pages/BridgeModule.tsx
index f3fb2d9..8be37cd 100644
--- a/app/src/pages/BridgeModule.tsx
+++ b/app/src/pages/BridgeModule.tsx
@@ -16,7 +16,6 @@ import ExportMenu from '../components/ExportMenu';
 import { EducationalManual } from '@/components/EducationalManual';
 import { WindParametersSummary } from '@/components/WindParametersSummary';
 import { exportGenericToPDF, type GenericPDFSection } from '../lib/export-generic-pdf';
-import { usePersistentState } from '@/hooks/usePersistentState';
 
 
 
diff --git a/app/src/pages/CalcCaModule.tsx b/app/src/pages/CalcCaModule.tsx
index c82ed38..c0930d4 100644
--- a/app/src/pages/CalcCaModule.tsx
+++ b/app/src/pages/CalcCaModule.tsx
@@ -1,4 +1,4 @@
-import { useState } from 'react';
+import { usePersistentState } from '@/hooks/usePersistentState';
 import { getDragCoefficient } from '@/lib/drag';
 import { DragCoefficientChart } from '@/components/DragCoefficientChart';
 import { ResizableBox3D } from '@/components/three/ResizableBox3D';
@@ -9,7 +9,6 @@ import { EducationalManual } from '@/components/EducationalManual';
 import { Wind, Box } from 'lucide-react';
 import { Slider } from '@/components/ui/slider';
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
-import { usePersistentState } from '@/hooks/usePersistentState';
 
 export default function CalcCaModule() {
   const [l1, setL1] = usePersistentState<number>('CalcCaModule_l1', 20);
diff --git a/app/src/pages/CylinderModule.tsx b/app/src/pages/CylinderModule.tsx
index eb5e5c8..54673bc 100644
--- a/app/src/pages/CylinderModule.tsx
+++ b/app/src/pages/CylinderModule.tsx
@@ -17,7 +17,6 @@ import { PressureLegend } from '@/components/PressureLegend';
 import { WindParametersSummary } from '@/components/WindParametersSummary';
 import { SaveModuleDialog } from '@/components/SaveModuleDialog';
 import { exportGenericToPDF, type GenericPDFSection } from '../lib/export-generic-pdf';
-import { usePersistentState } from '@/hooks/usePersistentState';
 
 const CylinderModule: React.FC = () => {
   const { vk, cpi: globalCpi } = useWindStore();
diff --git a/app/src/pages/DomeModule.tsx b/app/src/pages/DomeModule.tsx
index a3e32c2..06ec19f 100644
--- a/app/src/pages/DomeModule.tsx
+++ b/app/src/pages/DomeModule.tsx
@@ -17,7 +17,6 @@ import { PressureLegend } from '@/components/PressureLegend';
 import { WindParametersSummary } from '@/components/WindParametersSummary';
 import { SaveModuleDialog } from '@/components/SaveModuleDialog';
 import { exportGenericToPDF, type GenericPDFSection } from '../lib/export-generic-pdf';
-import { usePersistentState } from '@/hooks/usePersistentState';
 
 const DomeModule: React.FC = () => {
   const { vk, cpi } = useWindStore();
diff --git a/app/src/pages/DynamicsModule.tsx b/app/src/pages/DynamicsModule.tsx
index 94a645a..902b9fc 100644
--- a/app/src/pages/DynamicsModule.tsx
+++ b/app/src/pages/DynamicsModule.tsx
@@ -1,3 +1,4 @@
+import { usePersistentState } from '@/hooks/usePersistentState';
 import React, { useMemo, useState } from 'react';
 import { Card, CardContent, CardHeader, CardTitle, CardDescription } from '@/components/ui/card';
 import { Slider } from '@/components/ui/slider';
@@ -31,7 +32,6 @@ import { EducationalManual } from '@/components/EducationalManual';
 import { exportGenericToPDF, type GenericPDFSection } from '../lib/export-generic-pdf';
 import { WindParametersSummary } from '@/components/WindParametersSummary';
 import { SaveModuleDialog } from '@/components/SaveModuleDialog';
-import { usePersistentState } from '@/hooks/usePersistentState';
 
 const DynamicsModule: React.FC = () => {
   const { v0, s1, s3, terrainCategory, structureClass, q } = useWindStore();
diff --git a/app/src/pages/GalpaoModule.tsx b/app/src/pages/GalpaoModule.tsx
index 10a059f..92cf955 100644
--- a/app/src/pages/GalpaoModule.tsx
+++ b/app/src/pages/GalpaoModule.tsx
@@ -23,7 +23,6 @@ import { PressureLegend } from '@/components/PressureLegend';
 import { SaveModuleDialog } from '@/components/SaveModuleDialog';
 import { WindParametersSummary } from '@/components/WindParametersSummary';
 import { useHydrationStore } from '@/store/hydrationStore';
-import { usePersistentState } from '@/hooks/usePersistentState';
 
 const GalpaoModule: React.FC = () => {
   const {
diff --git a/app/src/pages/HomeMock.tsx b/app/src/pages/HomeMock.tsx
index 53572f8..2472353 100644
--- a/app/src/pages/HomeMock.tsx
+++ b/app/src/pages/HomeMock.tsx
@@ -2,7 +2,6 @@ import { Link } from 'react-router-dom';
 import { Warehouse, Cylinder, Church, CircleDot, Square, Layers, BarChart3, Frame, Tent, Calculator } from 'lucide-react';
 import { useI18n } from '../store/i18nStore';
 import { useWindStore } from '../store/appStore';
-import { usePersistentState } from '@/hooks/usePersistentState';
 
 // Mocked icons for bridge and tower to match App.tsx
 const BridgeIcon = (props: React.SVGProps<SVGSVGElement>) => (
diff --git a/app/src/pages/IsolatedRoofModule.tsx b/app/src/pages/IsolatedRoofModule.tsx
index bf36ab7..ceed164 100644
--- a/app/src/pages/IsolatedRoofModule.tsx
+++ b/app/src/pages/IsolatedRoofModule.tsx
@@ -1,3 +1,4 @@
+import { usePersistentState } from '@/hooks/usePersistentState';
 import React, { useMemo, useState } from 'react';
 import { Box, Wind } from 'lucide-react';
 import { Card, CardContent, CardHeader, CardTitle, CardDescription } from '@/components/ui/card';
@@ -15,7 +16,6 @@ import { PressureLegend } from '@/components/PressureLegend';
 import { WindParametersSummary } from '@/components/WindParametersSummary';
 import { SaveModuleDialog } from '@/components/SaveModuleDialog';
 import { exportGenericToPDF, type GenericPDFSection } from '../lib/export-generic-pdf';
-import { usePersistentState } from '@/hooks/usePersistentState';
 
 const IsolatedRoofModule: React.FC = () => {
   const { q } = useWindStore();
diff --git a/app/src/pages/PiperackModule.tsx b/app/src/pages/PiperackModule.tsx
index c3ff719..a726a74 100644
--- a/app/src/pages/PiperackModule.tsx
+++ b/app/src/pages/PiperackModule.tsx
@@ -1,4 +1,5 @@
-import React, { useMemo, useState } from 'react';
+import { usePersistentState } from '@/hooks/usePersistentState';
+import React, { useMemo } from 'react';
 import { Card, CardContent, CardHeader, CardTitle, CardDescription } from '@/components/ui/card';
 
 import { useHydrationStore } from '@/store/hydrationStore';
@@ -18,7 +19,6 @@ import { exportGenericToPDF, type GenericPDFSection } from '../lib/export-generi
 import { Plus, Trash2, Info, AlertTriangle } from 'lucide-react';
 import { Tooltip, TooltipContent, TooltipTrigger, TooltipProvider } from '@/components/ui/tooltip';
 import { Input } from '@/components/ui/input';
-import { usePersistentState } from '@/hooks/usePersistentState';
 
 const PiperackModule: React.FC = () => {
   const { q } = useWindStore();
diff --git a/app/src/pages/SettingsModule.tsx b/app/src/pages/SettingsModule.tsx
index f2719b6..51cd5c6 100644
--- a/app/src/pages/SettingsModule.tsx
+++ b/app/src/pages/SettingsModule.tsx
@@ -1,4 +1,5 @@
-import React, { useRef, useState } from 'react';
+import { usePersistentState } from '@/hooks/usePersistentState';
+import React, { useRef } from 'react';
 import { Card, CardContent, CardHeader, CardTitle, CardDescription } from '@/components/ui/card';
 import { Button } from '@/components/ui/button';
 import { Sun, Moon, Laptop, Save, Trash2, Upload, FlaskConical, Download, FolderOpen, FileBox, FileJson, GraduationCap } from 'lucide-react';
@@ -93,7 +94,6 @@ const SettingsModule: React.FC = () => {
         await save(newProject as any);
       } else {
         // Old snapshot import fallback
-import { usePersistentState } from '@/hooks/usePersistentState';
         importProjectFromText(text);
       }
     } catch (e) {
diff --git a/app/src/pages/ShelterModule.tsx b/app/src/pages/ShelterModule.tsx
index da86e63..49e88d6 100644
--- a/app/src/pages/ShelterModule.tsx
+++ b/app/src/pages/ShelterModule.tsx
@@ -1,4 +1,5 @@
-import React, { useMemo, useState } from 'react';
+import { usePersistentState } from '@/hooks/usePersistentState';
+import React, { useMemo } from 'react';
 import { Card, CardContent, CardHeader, CardTitle, CardDescription } from '@/components/ui/card';
 import { Slider } from '@/components/ui/slider';
 import { Badge } from '@/components/ui/badge';
@@ -22,7 +23,6 @@ import { SaveModuleDialog } from '@/components/SaveModuleDialog';
 import { exportGenericToPDF, type GenericPDFSection } from '../lib/export-generic-pdf';
 import { Eye, Box, Layers, ArrowUpRight, CheckCircle2, Wind, AlertTriangle } from 'lucide-react';
 import { cn } from '@/lib/utils';
-import { usePersistentState } from '@/hooks/usePersistentState';
 
 const conditionLabels: Record<ShelterCondition, string> = {
   cond1: '1. Estanque 3 lados (Fundo + Lados)',
diff --git a/app/src/pages/SignModule.tsx b/app/src/pages/SignModule.tsx
index 8393c62..8b08236 100644
--- a/app/src/pages/SignModule.tsx
+++ b/app/src/pages/SignModule.tsx
@@ -16,7 +16,6 @@ import { PressureLegend } from '@/components/PressureLegend';
 import { WindParametersSummary } from '@/components/WindParametersSummary';
 import { SaveModuleDialog } from '@/components/SaveModuleDialog';
 import { exportGenericToPDF, type GenericPDFSection } from '../lib/export-generic-pdf';
-import { usePersistentState } from '@/hooks/usePersistentState';
 
 const SignModule: React.FC = () => {
   const { q } = useWindStore();
diff --git a/app/src/pages/TowerModule.tsx b/app/src/pages/TowerModule.tsx
index 47104bf..d7dbe9b 100644
--- a/app/src/pages/TowerModule.tsx
+++ b/app/src/pages/TowerModule.tsx
@@ -13,7 +13,6 @@ import { EducationalManual } from '@/components/EducationalManual';
 import { WindParametersSummary } from '@/components/WindParametersSummary';
 import { SaveModuleDialog } from '@/components/SaveModuleDialog';
 import { exportGenericToPDF, type GenericPDFSection } from '../lib/export-generic-pdf';
-import { usePersistentState } from '@/hooks/usePersistentState';
 
 const TowerModule: React.FC = () => {
   const { q } = useWindStore();
diff --git a/app/src/pages/VaultModule.tsx b/app/src/pages/VaultModule.tsx
index b5e09cb..69ec345 100644
--- a/app/src/pages/VaultModule.tsx
+++ b/app/src/pages/VaultModule.tsx
@@ -17,7 +17,6 @@ import { PressureLegend } from '@/components/PressureLegend';
 import { WindParametersSummary } from '@/components/WindParametersSummary';
 import { SaveModuleDialog } from '@/components/SaveModuleDialog';
 import { exportGenericToPDF, type GenericPDFSection } from '../lib/export-generic-pdf';
-import { usePersistentState } from '@/hooks/usePersistentState';
 
 const VaultModule: React.FC = () => {
   const { vk } = useWindStore();