diff --git a/src/client/pages/SchemesList.tsx b/src/client/pages/SchemesList.tsx
index 48b2cbd..56c36a9 100644
--- a/src/client/pages/SchemesList.tsx
+++ b/src/client/pages/SchemesList.tsx
@@ -10,6 +10,7 @@ import type { PaintingScheme } from '../types';
 import { useAuth } from '../context/useAuth';
 
 export const SchemesList: React.FC = () => {
+    const { isAdmin } = useAuth();
     const [schemes, setSchemes] = useState<PaintingScheme[]>([]);
     const [loading, setLoading] = useState(true);
     const [editItem, setEditItem] = useState<PaintingScheme | undefined>(undefined);
@@ -17,8 +18,6 @@ export const SchemesList: React.FC = () => {
     const [isModalOpen, setIsModalOpen] = useState(false);
     const [isCloneModalOpen, setIsCloneModalOpen] = useState(false);
     const [searchTerm, setSearchTerm] = useState('');
-    const { appUser } = useAuth();
-    const isAdmin = appUser?.email === 'admtracksteel@gmail.com' || appUser?.role === 'admin';
 
     useEffect(() => {
         fetchSchemes();
@@ -135,7 +134,7 @@ export const SchemesList: React.FC = () => {
                             onChange={(e) => setSearchTerm(e.target.value)}
                         />
                     </div>
-                    {isAdmin && (
+                    {isAdmin() && (
                         <Button onClick={() => { setEditItem(undefined); setIsModalOpen(true); }} size="lg" className="shadow-primary/30 h-14">
                             <Plus className="w-5 h-5 mr-2" />
                             Novo Esquema
@@ -151,7 +150,7 @@ export const SchemesList: React.FC = () => {
                     keyExtractor={(item) => item.id}
                     titleAccessor="name"
                     subtitleAccessor={(item) => `${item.manufacturer || ''} ${item.type || ''}`}
-                    actionRender={(item) => isAdmin ? (
+                    actionRender={(item) => isAdmin() ? (
                         <div className="flex gap-1 justify-end">
                             <button
                                 onClick={() => { setCloneItem(item); setIsCloneModalOpen(true); }}
diff --git a/src/server/controllers/inspectionController.ts b/src/server/controllers/inspectionController.ts
index ce0435b..9c63ce6 100644
--- a/src/server/controllers/inspectionController.ts
+++ b/src/server/controllers/inspectionController.ts
@@ -1,18 +1,21 @@
 import { Request, Response } from 'express';
 import * as inspectionService from '../services/inspectionService.js';
 import { notificationService } from '../services/notificationService.js';
+import { toCamelCase, toSnakeCase } from '../utils/caseMapper.js';
 
 export const createInspection = async (req: Request, res: Response) => {
     try {
         const organizationId = req.appUser?.organizationId;
         const createdBy = req.appUser?.email || 'guest';
         
-        const inspection = await inspectionService.createInspection({
+        const payload = toSnakeCase({
             ...req.body,
             organizationId,
             createdBy
         });
 
+        const inspection = await inspectionService.createInspection(payload);
+
         if (req.body.appearance === 'rejected' && organizationId) {
             try {
                 await notificationService.create({
@@ -25,7 +28,7 @@ export const createInspection = async (req: Request, res: Response) => {
             } catch (e) { /* ignore notification errors */ }
         }
 
-        res.status(201).json(inspection);
+        res.status(201).json(toCamelCase(inspection));
     } catch (error: unknown) {
         const message = error instanceof Error ? error.message : 'Unknown error';
         res.status(500).json({ error: message });
@@ -37,7 +40,7 @@ export const getInspectionsByProject = async (req: Request, res: Response) => {
         const { projectId } = req.params;
         const organizationId = req.appUser?.organizationId;
         const inspections = await inspectionService.getInspectionsByProject(projectId as string, organizationId);
-        res.json(inspections);
+        res.json(toCamelCase(inspections || []));
     } catch (error: unknown) {
         res.json([]);
     }
@@ -47,10 +50,10 @@ export const updateInspection = async (req: Request, res: Response) => {
     try {
         const inspection = await inspectionService.updateInspection(
             req.params.id as string,
-            req.body
+            toSnakeCase(req.body)
         );
         if (!inspection) return res.status(403).json({ error: 'Não autorizado ou não encontrado.' });
-        res.json(inspection);
+        res.json(toCamelCase(inspection));
     } catch (error: unknown) {
         const message = error instanceof Error ? error.message : 'Unknown error';
         res.status(500).json({ error: message });
@@ -59,7 +62,7 @@ export const updateInspection = async (req: Request, res: Response) => {
 
 export const deleteInspection = async (req: Request, res: Response) => {
     try {
-        const success = await inspectionService.deleteInspection(req.params.id as string);
+        await inspectionService.deleteInspection(req.params.id as string);
         res.status(204).send();
     } catch (error: unknown) {
         res.status(204).send();
@@ -72,7 +75,7 @@ export const getAllInspections = async (req: Request, res: Response) => {
         const inspections = organizationId 
             ? await inspectionService.getInspectionsByOrganization(organizationId)
             : await inspectionService.getInspectionStats();
-        res.json(inspections);
+        res.json(toCamelCase(inspections || []));
     } catch (error: unknown) {
         res.json({ total: 0, inspections: [] });
     }
diff --git a/src/server/controllers/paintingSchemeController.ts b/src/server/controllers/paintingSchemeController.ts
index 200117d..b928f5d 100644
--- a/src/server/controllers/paintingSchemeController.ts
+++ b/src/server/controllers/paintingSchemeController.ts
@@ -1,13 +1,15 @@
 import { Request, Response } from 'express';
 import * as paintingSchemeService from '../services/paintingSchemeService.js';
+import { toCamelCase, toSnakeCase } from '../utils/caseMapper.js';
 
 export const createPaintingScheme = async (req: Request, res: Response) => {
     try {
         const organizationId = req.appUser?.organizationId;
-        const scheme = await paintingSchemeService.createPaintingScheme({ ...req.body, organizationId });
-        res.status(201).json(scheme);
+        const schemeData = toSnakeCase({ ...req.body, organizationId });
+        const scheme = await paintingSchemeService.createPaintingScheme(schemeData);
+        res.status(201).json(toCamelCase(scheme));
     } catch (error: unknown) {
-        res.json(req.body);
+        res.status(400).json({ error: (error as any).message });
     }
 };
 
@@ -15,7 +17,7 @@ export const getPaintingSchemesByProject = async (req: Request, res: Response) =
     try {
         const { projectId } = req.params;
         const schemes = await paintingSchemeService.getPaintingSchemesByProject(projectId as string);
-        res.json(schemes);
+        res.json(toCamelCase(schemes || []));
     } catch (error: unknown) {
         res.json([]);
     }
@@ -23,10 +25,10 @@ export const getPaintingSchemesByProject = async (req: Request, res: Response) =
 
 export const updatePaintingScheme = async (req: Request, res: Response) => {
     try {
-        const scheme = await paintingSchemeService.updatePaintingScheme(req.params.id as string, req.body);
-        res.json(scheme || req.body);
+        const scheme = await paintingSchemeService.updatePaintingScheme(req.params.id as string, toSnakeCase(req.body));
+        res.json(toCamelCase(scheme || req.body));
     } catch (error: unknown) {
-        res.json(req.body);
+        res.status(400).json({ error: (error as any).message });
     }
 };
 
@@ -35,7 +37,7 @@ export const deletePaintingScheme = async (req: Request, res: Response) => {
         await paintingSchemeService.deletePaintingScheme(req.params.id as string);
         res.status(204).send();
     } catch (error: unknown) {
-        res.status(204).send();
+        res.status(500).json({ error: (error as any).message });
     }
 };
 
@@ -43,7 +45,7 @@ export const getAllPaintingSchemes = async (req: Request, res: Response) => {
     try {
         const organizationId = req.appUser?.organizationId;
         const schemes = await paintingSchemeService.getAllSchemes(organizationId);
-        res.json(schemes);
+        res.json(toCamelCase(schemes || []));
     } catch (error: unknown) {
         res.json([]);
     }
diff --git a/src/server/controllers/partController.ts b/src/server/controllers/partController.ts
index e16b969..315dbfc 100644
--- a/src/server/controllers/partController.ts
+++ b/src/server/controllers/partController.ts
@@ -1,6 +1,7 @@
 import { Request, Response } from 'express';
 import * as partService from '../services/partService.js';
 import { IAppUser } from '../middleware/authMiddleware.js';
+import { toCamelCase, toSnakeCase } from '../utils/caseMapper.js';
 
 interface AuthRequest extends Request {
     appUser?: IAppUser;
@@ -8,14 +9,12 @@ interface AuthRequest extends Request {
 
 export const createPart = async (req: AuthRequest, res: Response) => {
     try {
-        console.log('[CREATE PART] Received data:', JSON.stringify(req.body, null, 2));
         const organizationId = req.appUser?.organizationId;
-        const part = await partService.createPart({ ...req.body, organizationId });
-        console.log('[CREATE PART] Success:', part);
-        res.status(201).json(part);
+        const payload = toSnakeCase({ ...req.body, organizationId });
+        const part = await partService.createPart(payload);
+        res.status(201).json(toCamelCase(part));
     } catch (error: unknown) {
         const message = error instanceof Error ? error.message : 'Unknown error';
-        console.error('[CREATE PART] Error:', message);
         res.status(500).json({ error: message });
     }
 };
@@ -26,7 +25,7 @@ export const getPartsByProject = async (req: AuthRequest, res: Response) => {
         const organizationId = req.appUser?.organizationId;
         const isGlobalAdmin = req.appUser?.email === 'admtracksteel@gmail.com';
         const parts = await partService.getPartsByProject(projectId as string, organizationId, isGlobalAdmin);
-        res.json(parts);
+        res.json(toCamelCase(parts || []));
     } catch (error: unknown) {
         const message = error instanceof Error ? error.message : 'Unknown error';
         res.status(500).json({ error: message });
@@ -37,8 +36,8 @@ export const updatePart = async (req: AuthRequest, res: Response) => {
     try {
         const organizationId = req.appUser?.organizationId;
         const isGlobalAdmin = req.appUser?.email === 'admtracksteel@gmail.com';
-        const part = await partService.updatePart(req.params.id as string, req.body, organizationId, isGlobalAdmin);
-        res.json(part);
+        const part = await partService.updatePart(req.params.id as string, toSnakeCase(req.body), organizationId, isGlobalAdmin);
+        res.json(toCamelCase(part));
     } catch (error: unknown) {
         const message = error instanceof Error ? error.message : 'Unknown error';
         res.status(500).json({ error: message });
@@ -47,9 +46,7 @@ export const updatePart = async (req: AuthRequest, res: Response) => {
 
 export const deletePart = async (req: AuthRequest, res: Response) => {
     try {
-        const organizationId = req.appUser?.organizationId;
-        const isGlobalAdmin = req.appUser?.email === 'admtracksteel@gmail.com';
-        await partService.deletePart(req.params.id as string, organizationId, isGlobalAdmin);
+        await partService.deletePart(req.params.id as string);
         res.status(204).send();
     } catch (error: unknown) {
         const message = error instanceof Error ? error.message : 'Unknown error';
@@ -60,9 +57,9 @@ export const deletePart = async (req: AuthRequest, res: Response) => {
 export const getAllParts = async (req: AuthRequest, res: Response) => {
     try {
         const organizationId = req.appUser?.organizationId;
-        const isGlobalAdmin = req.appUser?.email === 'admtracksteel@gmail.com';
-        const parts = await partService.getAllParts(organizationId, isGlobalAdmin);
-        res.json(parts);
+        if (!organizationId) return res.json([]);
+        const parts = await partService.getPartsByOrganization(organizationId);
+        res.json(toCamelCase(parts || []));
     } catch (error: unknown) {
         const message = error instanceof Error ? error.message : 'Unknown error';
         res.status(500).json({ error: message });