fix(providers): remove per-key headers input for openai-compatibility

The backend OpenAICompatibilityAPIKey struct only has api-key and
proxy-url (internal/config/config.go:570-577). PUT /openai-compatibility
unmarshals into this struct (config_lists.go:439) and discards any
unknown field, so per-entry headers submitted from the UI never persist
and never reach the runtime request path. The GET response wrapper
also has no headers field (config_auth_index.go:31-34).

Drop the per-entry headers input from BaseProviderForm and the
ApiKeyEntry/ApiKeyEntryInput types. Connectivity test and model
discovery stop reading entry-level headers — they continue to apply
provider-level headers, which is the supported contract.

src/features/providers/sheets/forms/BaseProviderForm.tsx

@@ -55,15 +55,8 @@ const emptyModel = (): ModelEntryInput => ({ name: '', alias: '' });
 const emptyApiKeyEntry = (): ApiKeyEntryInput => ({
   apiKey: '',
   proxyUrl: '',
-  headersText: '',
 });
 
-const headersObjectToText = (headers?: Record<string, string>): string =>
-  Object.entries(headers ?? {})
-    .filter(([k]) => k.trim())
-    .map(([k, v]) => `${k}: ${v}`)
-    .join('\n');
-
 const stripDisableAllRule = (list?: string[]): string[] =>
   (list ?? []).filter((s) => s.trim() !== '*');
 
@@ -124,7 +117,6 @@ function buildInitialForm(
         ? cfg.apiKeyEntries.map((entry) => ({
             apiKey: entry.apiKey,
             proxyUrl: entry.proxyUrl ?? '',
-            headersText: headersObjectToText(entry.headers),
             authIndex: entry.authIndex,
           }))
         : [emptyApiKeyEntry()],
@@ -823,30 +815,6 @@ export function BaseProviderForm({
                       placeholder="http://127.0.0.1:7890"
                     />
                   </div>
-                  <div className={styles.field}>
-                    <label className={styles.label}>
-                      {t('providersPage.form.headers')}
-                      <span className={styles.labelHint}>
-                        {' '}
-                        · {t('providersPage.form.headersHint')}
-                      </span>
-                    </label>
-                    <textarea
-                      className={styles.textarea}
-                      value={entry.headersText}
-                      rows={3}
-                      onChange={(e) =>
-                        updateField(
-                          'apiKeyEntries',
-                          apiKeyEntries.map((it, i) =>
-                            i === realIdx ? { ...it, headersText: e.target.value } : it
-                          )
-                        )
-                      }
-                      disabled={mutating}
-                      placeholder="X-Custom-Header: value"
-                    />
-                  </div>
                   {status.state === 'error' ? (
                     <div className={styles.connectivityError}>
                       {status.message}

src/features/providers/sheets/forms/useConnectivityTest.ts

@@ -42,23 +42,6 @@ const pickModel = (
   return '';
 };
 
-const parseHeadersText = (text: string): Record<string, string> => {
-  const out: Record<string, string> = {};
-  String(text ?? '')
-    .split(/\n+/)
-    .map((line) => line.trim())
-    .filter(Boolean)
-    .forEach((line) => {
-      const sep = line.indexOf(':');
-      if (sep <= 0) return;
-      const key = line.slice(0, sep).trim();
-      const value = line.slice(sep + 1).trim();
-      if (!key) return;
-      out[key] = value;
-    });
-  return out;
-};
-
 const resolveBearerToken = (headers: Record<string, string>): string => {
   const auth = Object.entries(headers).find(
     ([k]) => k.toLowerCase() === 'authorization'
@@ -130,7 +113,6 @@ export function useConnectivityTest(
             entry.apiKey ?? '',
             entry.authIndex ?? '',
             entry.proxyUrl ?? '',
-            entry.headersText ?? '',
           ].join('||')
       ),
     [apiKeyEntries]
@@ -225,7 +207,6 @@ export function useConnectivityTest(
       const headerObj: Record<string, string> = {
         'Content-Type': 'application/json',
         ...buildHeaderObject(formHeaders),
-        ...parseHeadersText(entry?.headersText ?? ''),
       };
       if (!hasHeader(headerObj, 'authorization')) {
         if (entryKey) {

src/features/providers/sheets/forms/useModelDiscovery.ts

@@ -14,23 +14,6 @@ export const MODEL_DISCOVERY_BRANDS: ReadonlyArray<ProviderBrand> = [
 export const isModelDiscoveryBrand = (brand: ProviderBrand): boolean =>
   MODEL_DISCOVERY_BRANDS.includes(brand);
 
-const parseHeadersText = (text: string): Record<string, string> => {
-  const out: Record<string, string> = {};
-  String(text ?? '')
-    .split(/\n+/)
-    .map((line) => line.trim())
-    .filter(Boolean)
-    .forEach((line) => {
-      const sep = line.indexOf(':');
-      if (sep <= 0) return;
-      const key = line.slice(0, sep).trim();
-      const value = line.slice(sep + 1).trim();
-      if (!key) return;
-      out[key] = value;
-    });
-  return out;
-};
-
 const toErrorMessage = (err: unknown): string => {
   if (err instanceof Error) return err.message;
   if (typeof err === 'string') return err;
@@ -115,13 +98,11 @@ export function useModelDiscovery(
         const entryKey = (firstEntry?.apiKey ?? '').trim();
         const entryAuthIndex =
           (firstEntry?.authIndex ?? '').trim() || resolvedAuthIndex;
-        const entryHeaders = parseHeadersText(firstEntry?.headersText ?? '');
-        const headers = { ...baseHeaders, ...entryHeaders };
         try {
           next = await modelsApi.fetchModelsViaApiCall(
             baseUrl,
             entryKey,
-            headers,
+            baseHeaders,
             entryAuthIndex
           );
         } catch (firstErr) {
@@ -167,7 +148,7 @@ export function useModelDiscovery(
       .map((h) => `${h.key}:${h.value}`)
       .join('|');
     const entriesSig = (apiKeyEntries ?? [])
-      .map((e) => `${e.apiKey ?? ''}::${e.authIndex ?? ''}::${e.headersText ?? ''}`)
+      .map((e) => `${e.apiKey ?? ''}::${e.authIndex ?? ''}`)
       .join('|');
     return [
       baseUrl,

src/features/providers/types.ts

@@ -91,7 +91,6 @@ export interface ModelEntryInput {
 export interface ApiKeyEntryInput {
   apiKey: string;
   proxyUrl: string;
-  headersText: string;
   authIndex?: string;
 }
 

src/features/providers/useProviderWorkbench.ts

@@ -74,23 +74,6 @@ const parseTextList = (text: string): string[] =>
     .map((item) => item.trim())
     .filter(Boolean);
 
-const parseHeadersText = (text: string): Record<string, string> => {
-  const result: Record<string, string> = {};
-  text
-    .split(/\n+/)
-    .map((line) => line.trim())
-    .filter(Boolean)
-    .forEach((line) => {
-      const sep = line.indexOf(':');
-      if (sep <= 0) return;
-      const key = line.slice(0, sep).trim();
-      const value = line.slice(sep + 1).trim();
-      if (!key) return;
-      result[key] = value;
-    });
-  return result;
-};
-
 const headersFromEntries = (
   entries: Array<{ key: string; value: string }>
 ): Record<string, string> => {
@@ -177,9 +160,6 @@ const buildOpenAIConfig = (
       ?.map((entry) => ({
         apiKey: entry.apiKey.trim(),
         proxyUrl: entry.proxyUrl.trim() || undefined,
-        headers: Object.keys(parseHeadersText(entry.headersText)).length
-          ? parseHeadersText(entry.headersText)
-          : undefined,
         authIndex: entry.authIndex?.trim() || undefined,
       }))
       .filter((entry) => entry.apiKey) ?? [];

src/services/api/providers.ts

@@ -265,8 +265,6 @@ const serializeModelAliases = (models?: ModelAlias[]) =>
 const serializeApiKeyEntry = (entry: ApiKeyEntry) => {
   const payload: Record<string, unknown> = { 'api-key': entry.apiKey };
   if (entry.proxyUrl) payload['proxy-url'] = entry.proxyUrl;
-  const headers = serializeHeaders(entry.headers);
-  if (headers) payload.headers = headers;
   return payload;
 };
 

src/services/api/transformers.ts

@@ -99,13 +99,11 @@ const normalizeApiKeyEntry = (entry: unknown): ApiKeyEntry | null => {
   if (!trimmed) return null;
 
   const proxyUrl = record?.['proxy-url'];
-  const headers = record ? normalizeHeaders(record.headers) : undefined;
   const authIndex = normalizeAuthIndex(record?.['auth-index']);
 
   const result: ApiKeyEntry = {
     apiKey: trimmed,
-    proxyUrl: proxyUrl ? String(proxyUrl) : undefined,
-    headers
+    proxyUrl: proxyUrl ? String(proxyUrl) : undefined
   };
   if (authIndex) result.authIndex = authIndex;
   return result;

src/types/provider.ts

@@ -13,7 +13,6 @@ export interface ModelAlias {
 export interface ApiKeyEntry {
   apiKey: string;
   proxyUrl?: string;
-  headers?: Record<string, string>;
   authIndex?: string;
 }