Merge remote-tracking branch 'origin/master' into gitea/feature/end

Resolved conflicts taking origin/master (v0.5.55) as canonical, with local
features re-applied:
- runtime log level (LOG_LEVEL env + dashboard Settings → Logging, applied
  immediately and persisted across restarts)
- free/noAuth provider enable/disable toggle via providerStrategies.enabled
- parallel model testing (Test All Models / Test Selected Keys)

open-sse/executors/base.js

@@ -3,6 +3,7 @@ import { shouldRefreshCredentials } from "../services/oauthCredentialManager.js"
 import { proxyAwareFetch } from "../utils/proxyFetch.js";
 import { dbg } from "../utils/debugLog.js";
 import { ANTHROPIC_API_VERSION, OPENAI_COMPAT_BASE, ANTHROPIC_COMPAT_BASE } from "../providers/shared.js";
+import { resolveOpenAICompatibleApiType } from "../services/provider.js";
 
 /**
  * BaseExecutor - Base class for provider executors
@@ -30,7 +31,7 @@ export class BaseExecutor {
     if (this.provider?.startsWith?.("openai-compatible-")) {
       const baseUrl = credentials?.providerSpecificData?.baseUrl || OPENAI_COMPAT_BASE;
       const normalized = baseUrl.replace(/\/$/, "");
-      const path = this.provider.includes("responses") ? "/responses" : "/chat/completions";
+      const path = resolveOpenAICompatibleApiType(this.provider, credentials) === "responses" ? "/responses" : "/chat/completions";
       return `${normalized}${path}`;
     }
     if (this.provider?.startsWith?.("anthropic-compatible-")) {
@@ -126,7 +127,7 @@ export class BaseExecutor {
     for (let urlIndex = 0; urlIndex < fallbackCount; urlIndex++) {
       const url = this.buildUrl(model, stream, urlIndex, credentials);
       const transformedBody = this.transformRequest(model, body, stream, credentials);
-      const headers = this.buildHeaders(credentials, stream);
+      const headers = this.buildHeaders(credentials, stream, url, model);
 
       if (!retryAttemptsByUrl[urlIndex]) retryAttemptsByUrl[urlIndex] = 0;