diff --git a/front-public/angular.json b/front-public/angular.json
index be0490b..872a466 100644
--- a/front-public/angular.json
+++ b/front-public/angular.json
@@ -57,7 +57,13 @@
                 { "type": "initial", "maximumWarning": "500kB", "maximumError": "1MB" },
                 { "type": "anyComponentStyle", "maximumWarning": "4kB", "maximumError": "8kB" }
               ],
-              "outputHashing": "all"
+              "outputHashing": "all",
+              "fileReplacements": [
+                {
+                  "replace": "src/environments/environment.ts",
+                  "with": "src/environments/environment.prod.ts"
+                }
+              ]
             },
             "development": {
               "optimization": false,
diff --git a/front-public/package.json b/front-public/package.json
index ff9aa45..1ff8371 100644
--- a/front-public/package.json
+++ b/front-public/package.json
@@ -11,6 +11,7 @@
   },
   "dependencies": {
     "@datacat/shared": "workspace:*",
+    "@gouvfr/dsfr": "^1.13.0",
     "@angular/animations": "^19.0.0",
     "@angular/common": "^19.0.0",
     "@angular/compiler": "^19.0.0",
@@ -28,7 +29,6 @@
     "@angular/cli": "^19.0.0",
     "@angular/compiler-cli": "^19.0.0",
     "@types/node": "^22.0.0",
-    "@gouvfr/dsfr": "^1.13.0",
     "typescript": "~5.8.3",
     "sass": "^1.83.0"
   }
diff --git a/front-public/src/app/app.config.ts b/front-public/src/app/app.config.ts
index 1c7fc6a..a8940e2 100644
--- a/front-public/src/app/app.config.ts
+++ b/front-public/src/app/app.config.ts
@@ -1,12 +1,13 @@
 import { ApplicationConfig, provideZoneChangeDetection } from '@angular/core';
 import { provideRouter, withComponentInputBinding } from '@angular/router';
-import { provideHttpClient, withInterceptorsFromDi } from '@angular/common/http';
+import { provideHttpClient, withInterceptors } from '@angular/common/http';
 import { routes } from './app.routes';
+import { errorInterceptor } from './core/error.interceptor';
 
 export const appConfig: ApplicationConfig = {
   providers: [
     provideZoneChangeDetection({ eventCoalescing: true }),
     provideRouter(routes, withComponentInputBinding()),
-    provideHttpClient(withInterceptorsFromDi()),
+    provideHttpClient(withInterceptors([errorInterceptor])),
   ],
 };
diff --git a/front-public/src/app/core/api.service.ts b/front-public/src/app/core/api.service.ts
index 79a9378..21b0410 100644
--- a/front-public/src/app/core/api.service.ts
+++ b/front-public/src/app/core/api.service.ts
@@ -1,12 +1,14 @@
 import { Injectable, inject } from '@angular/core';
 import { HttpClient } from '@angular/common/http';
 import { Observable } from 'rxjs';
-import { ApiEntry, ApiEntryListItem, ApiListResponse, ApiListQuery } from '@datacat/shared';
+import { ApiEntry, ApiEntryListItem, ApiListResponse, ApiListQuery, ApiType } from '@datacat/shared';
+import { environment } from '../../environments/environment';
 
 @Injectable({ providedIn: 'root' })
 export class ApiService {
   private http = inject(HttpClient);
-  private baseUrl = '/api/apis';
+  private baseUrl = `${environment.apiBaseUrl}/apis`;
+  private uploadsUrl = `${environment.apiBaseUrl}/uploads`;
 
   list(query?: ApiListQuery): Observable<ApiListResponse> {
     const params: Record<string, string> = {};
@@ -58,30 +60,23 @@ export class ApiService {
   }
 
   upload(formData: FormData): Observable<ApiEntry> {
-    return this.http.post<ApiEntry>('/api/uploads', formData);
+    return this.http.post<ApiEntry>(this.uploadsUrl, formData);
   }
 
-  validate(formData: FormData): Observable<{
-    valid: boolean;
-    type: 'ASYNCAPI' | 'OPENAPI' | null;
-    mainFile: string | null;
-    name: string | null;
-    versionMajor: number | null;
-    versionMinor: number | null;
-    versionPatch: number | null;
-    description: string | null;
-    errors: Array<{ file: string; message: string }>;
-  }> {
-    return this.http.post<{
-      valid: boolean;
-      type: 'ASYNCAPI' | 'OPENAPI' | null;
-      mainFile: string | null;
-      name: string | null;
-      versionMajor: number | null;
-      versionMinor: number | null;
-      versionPatch: number | null;
-      description: string | null;
-      errors: Array<{ file: string; message: string }>;
-    }>('/api/uploads/validate', formData);
+  validate(formData: FormData): Observable<ValidateResponse> {
+    return this.http.post<ValidateResponse>(`${this.uploadsUrl}/validate`, formData);
   }
 }
+
+/** Réponse de l'endpoint de validation d'upload (POST /uploads/validate). */
+export interface ValidateResponse {
+  valid: boolean;
+  type: ApiType | null;
+  mainFile: string | null;
+  name: string | null;
+  versionMajor: number | null;
+  versionMinor: number | null;
+  versionPatch: number | null;
+  description: string | null;
+  errors: Array<{ file: string; message: string }>;
+}
diff --git a/front-public/src/app/core/category.service.ts b/front-public/src/app/core/category.service.ts
index e375e79..a032d49 100644
--- a/front-public/src/app/core/category.service.ts
+++ b/front-public/src/app/core/category.service.ts
@@ -6,11 +6,12 @@ import {
   CategoryListResponse,
   CategoryBrowseResponse,
 } from '@datacat/shared';
+import { environment } from '../../environments/environment';
 
 @Injectable({ providedIn: 'root' })
 export class CategoryService {
   private http = inject(HttpClient);
-  private baseUrl = '/api/categories';
+  private baseUrl = `${environment.apiBaseUrl}/categories`;
 
   list(search?: string): Observable<CategoryListResponse> {
     const params: Record<string, string> = {};
diff --git a/front-public/src/app/core/error.interceptor.ts b/front-public/src/app/core/error.interceptor.ts
new file mode 100644
index 0000000..a31aa57
--- /dev/null
+++ b/front-public/src/app/core/error.interceptor.ts
@@ -0,0 +1,18 @@
+import { HttpErrorResponse, HttpInterceptorFn } from '@angular/common/http';
+import { inject } from '@angular/core';
+import { ErrorService } from './error.service';
+import { catchError, throwError } from 'rxjs';
+
+/**
+ * Interceptor HTTP fonctionnel : journalise et normalise les erreurs réseau en
+ * un message lisible (via ErrorService), puis relaie l'erreur aux appelants.
+ */
+export const errorInterceptor: HttpInterceptorFn = (req, next) => {
+  const errorService = inject(ErrorService);
+  return next(req).pipe(
+    catchError((error: HttpErrorResponse) => {
+      errorService.log(req.method, req.url, error);
+      return throwError(() => error);
+    }),
+  );
+};
diff --git a/front-public/src/app/core/error.service.ts b/front-public/src/app/core/error.service.ts
new file mode 100644
index 0000000..3ec3055
--- /dev/null
+++ b/front-public/src/app/core/error.service.ts
@@ -0,0 +1,32 @@
+import { HttpErrorResponse } from '@angular/common/http';
+import { Injectable } from '@angular/core';
+
+/**
+ * Centralise la traduction d'une erreur HTTP en message lisible et son
+ * journal. Les composants appellent `toMessage(err)` plutôt que de
+ * réimplémenter chacun leur extraction de message.
+ */
+@Injectable({ providedIn: 'root' })
+export class ErrorService {
+  /** Extrait un message lisible depuis une erreur HTTP (ou autre). */
+  toMessage(error: unknown, fallback = 'Une erreur est survenue.'): string {
+    if (error instanceof HttpErrorResponse) {
+      const body = error.error;
+      if (typeof body === 'string' && body.trim()) return body;
+      if (body && typeof body === 'object') {
+        const message = (body as { message?: unknown }).message;
+        if (typeof message === 'string' && message) return message;
+        if (Array.isArray(message) && message.length) return message.join(', ');
+      }
+      if (error.status === 0) return 'Serveur injoignable. Vérifiez votre connexion.';
+      return error.message || fallback;
+    }
+    if (error instanceof Error && error.message) return error.message;
+    return fallback;
+  }
+
+  /** Journalise une erreur réseau (appelé par l'interceptor). */
+  log(method: string, url: string, error: HttpErrorResponse): void {
+    console.error(`[HTTP ${error.status}] ${method} ${url} — ${this.toMessage(error)}`);
+  }
+}
diff --git a/front-public/src/app/pages/upload/upload.component.ts b/front-public/src/app/pages/upload/upload.component.ts
index 669126d..8e3ca54 100644
--- a/front-public/src/app/pages/upload/upload.component.ts
+++ b/front-public/src/app/pages/upload/upload.component.ts
@@ -560,7 +560,7 @@ export class UploadComponent implements OnInit {
   });
 
   /* Convertit valueChanges en signal pour que les computed() trackent les changements du formulaire */
-  private readonly formValues = toSignal(this.metaForm.valueChanges, { initialValue: this.metaForm.value });
+  protected readonly formValues = toSignal(this.metaForm.valueChanges, { initialValue: this.metaForm.value });
 
   previewTitle = computed(() => {
     const values = this.formValues();
diff --git a/front-public/src/environments/environment.prod.ts b/front-public/src/environments/environment.prod.ts
new file mode 100644
index 0000000..9934449
--- /dev/null
+++ b/front-public/src/environments/environment.prod.ts
@@ -0,0 +1,4 @@
+export const environment = {
+  production: true,
+  apiBaseUrl: '/api',
+};
diff --git a/front-public/src/environments/environment.ts b/front-public/src/environments/environment.ts
new file mode 100644
index 0000000..54f6495
--- /dev/null
+++ b/front-public/src/environments/environment.ts
@@ -0,0 +1,5 @@
+export const environment = {
+  production: false,
+  // Préfixe des appels API (proxifié vers le back en dev, cf. proxy.conf*.json).
+  apiBaseUrl: '/api',
+};