merge: sync upstream v0.5.81 into MIBP fork

# Conflicts:
#	.gitignore
#	Dockerfile
#	open-sse/handlers/chatCore.js
#	open-sse/providers/registry/cline.js
#	open-sse/providers/registry/index.js
#	open-sse/services/usage.js
#	open-sse/utils/streamHandler.js
#	package.json
#	src/app/(dashboard)/dashboard/profile/page.js
#	src/app/(dashboard)/dashboard/providers/[id]/page.js

open-sse/executors/default.js

@@ -151,7 +151,7 @@ export class DefaultExecutor extends BaseExecutor {
     return BEARER;
   }
 
-  buildHeaders(credentials, stream = true, url, model) {
+  buildHeaders(credentials, stream = true, url, model, body = null) {
     const rt = credentials?.runtimeTransport;
     const headers = { "Content-Type": "application/json", ...(rt ? rt.headers : this.config.headers) };
     const desc = rt?.auth || AUTH_DESCRIPTORS[this.provider] || this.resolveAuthDescriptor();
@@ -159,8 +159,19 @@ export class DefaultExecutor extends BaseExecutor {
     for (const hook of desc.hooks || []) HEADER_HOOKS[hook]?.(headers, credentials);
     applyAuth(headers, desc, credentials);
 
-    if (this.provider === "claude" && model) {
-      headers["Anthropic-Beta"] = selectAnthropicBeta(model);
+    // anthropic-compatible-* nodes serving a real Claude model sit in front of
+    // Anthropic itself (a rotating multi-account proxy, a corporate gateway),
+    // so the request needs the same beta flags the `claude` provider sends:
+    // without `context-management-2025-06-27` upstream rejects the
+    // `context_management` block Claude Code puts in every request with
+    // "context_management: Extra inputs are not permitted" (HTTP 400), and the
+    // combo silently falls through to the next model. The model id gates this:
+    // a node fronting Kimi or GLM answers on its own ids and never matches, so
+    // gateways that would choke on unknown beta flags are left untouched.
+    const isClaudeModel = typeof model === "string" && /^claude-/.test(model);
+    if (model && (this.provider === "claude"
+      || (this.provider?.startsWith?.("anthropic-compatible-") && isClaudeModel))) {
+      headers["Anthropic-Beta"] = selectAnthropicBeta(model, body);
     }
 
     // Strip first-party Claude Code identity headers for non-Anthropic anthropic-compatible upstreams