fix(playground): inject X-Organization-Id on non-umi fetch paths

Playground completions (chat streaming via ``fetchChunkedData``)
and the raw ``fetch()`` calls for image / audio generation skip
umi's ``request`` pipeline and so miss the request interceptor in
``request.extensions.ts`` that pins tenant context. Higress
receives those calls without ``X-Organization-Id`` and the auth
callback falls back to the user's USER-principal id rather than
their active Org, which makes Playground usage invisible from
Org-scoped Usage views even after the backend learned to backfill
``consumer_principal_id``.

Centralise the lookup in ``tenantHeaders()`` next to
``fetchChunkedData`` so both streaming helpers and the four
``fetch()``-direct entry points in ``playground/apis/index.ts``
(image / TTS) attach the header with the same precedence as the
umi interceptor (``createScopeOrgOverride`` first,
``currentOrganizationId`` second). Returns an empty object when
no active org context is set, leaving requests unchanged.

src/pages/playground/apis/index.ts

@@ -1,5 +1,9 @@
 import { GPUSTACK_API_BASE_URL, OPENAI_COMPATIBLE } from '@/config/settings';
-import { createFormData, errorHandler } from '@/utils/fetch-chunk-data';
+import {
+  createFormData,
+  errorHandler,
+  tenantHeaders
+} from '@/utils/fetch-chunk-data';
 import { request } from '@umijs/max';
 
 export { GPUSTACK_API_BASE_URL, OPENAI_COMPATIBLE };
@@ -92,7 +96,8 @@ export const createImages = async (
     body: JSON.stringify(params),
     signal: options.signal,
     headers: {
-      'Content-Type': 'application/json'
+      'Content-Type': 'application/json',
+      ...tenantHeaders()
     }
   });
   if (!res.ok) {
@@ -112,7 +117,10 @@ export const editImage = async (params: {
   const response = await fetch(EDIT_IMAGE_API, {
     method: 'POST',
     body: createFormData(params.data),
-    signal: params.signal
+    signal: params.signal,
+    headers: {
+      ...tenantHeaders()
+    }
   });
   if (!response.ok) {
     return await errorHandler(response);
@@ -129,7 +137,8 @@ export const createImage = async (params: {
     body: JSON.stringify(params.data),
     signal: params.signal,
     headers: {
-      'Content-Type': 'application/json'
+      'Content-Type': 'application/json',
+      ...tenantHeaders()
     }
   });
 
@@ -156,7 +165,8 @@ export const textToSpeech = async (params: any, options?: any) => {
     method: 'POST',
     body: JSON.stringify(params.data),
     headers: {
-      'Content-Type': 'application/json'
+      'Content-Type': 'application/json',
+      ...tenantHeaders()
     },
     signal: params.signal
   });