Sprint 9: add tenant-driven API resolution layer

src/app/interceptors/api-base-url.interceptor.ts

@@ -0,0 +1,18 @@
+import { HttpInterceptorFn } from '@angular/common/http';
+import { inject } from '@angular/core';
+import { ApiConfigService } from '../core/config/api-config.service';
+
+export const apiBaseUrlInterceptor: HttpInterceptorFn = (req, next) => {
+  const apiConfig = inject(ApiConfigService);
+
+  if (!req.url.startsWith('/api')) {
+    return next(req);
+  }
+
+  const resolvedUrl = apiConfig.toApiUrl(req.url);
+  if (resolvedUrl === req.url) {
+    return next(req);
+  }
+
+  return next(req.clone({ url: resolvedUrl }));
+};

src/app/interceptors/api-headers.interceptor.ts

@@ -1,9 +1,9 @@
 import { HttpInterceptorFn } from '@angular/common/http';
 import { inject } from '@angular/core';
+import { ApiConfigService } from '../core/config/api-config.service';
 import { LocationService } from '../services/location.service';
 import { LanguageService } from '../services/language.service';
 import { AuthService } from '../services/auth.service';
-import { environment } from '../../environments/environment';
 
 /** Map internal language codes to API header values */
 const LANG_HEADER_MAP: Record<string, string> = {
@@ -39,7 +39,8 @@ function getAnonymousSessionId(): string {
 }
 
 export const apiHeadersInterceptor: HttpInterceptorFn = (req, next) => {
-  if (!req.url.startsWith(environment.apiUrl)) {
+  const apiConfig = inject(ApiConfigService);
+  if (!apiConfig.isApiRequest(req.url)) {
     return next(req);
   }