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/handlers/chatCore.js

@@ -28,7 +28,7 @@ import { compressWithPxpipe } from "../rtk/pxpipe.js";
 import { getCapabilitiesForModel } from "../providers/capabilities.js";
 import { stripUnsupportedModalities } from "../translator/concerns/modality.js";
 import { prefetchRemoteImages } from "../translator/concerns/prefetch.js";
-import { defaultClaudeToolType } from "../translator/concerns/toolCall.js";
+import { defaultClaudeToolType, shouldDefaultClaudeToolType } from "../translator/concerns/toolCall.js";
 import { resolveSessionId } from "../utils/sessionManager.js";
 import { markPoolUnfit, clearPoolUnfit } from "../services/proxyPoolFitness.js";
 
@@ -249,7 +249,11 @@ export async function handleChatCore({ body, modelInfo, credentials, log, onCred
 
   // Claude tool schema requires `type` to be explicitly set; strict gateways (e.g., MiniMax)
   // reject legacy payloads that omit it with HTTP 400. Default to "custom" when missing.
-  if (finalFormat === FORMATS.CLAUDE && Array.isArray(translatedBody.tools)) {
+  // Provider-scoped via quirks (shouldDefaultClaudeToolType): only gateways that declare
+  // requireClaudeToolType get the explicit type. Applying it unconditionally breaks
+  // Claude-format endpoints that only accept the legacy typeless tool shape — DeepSeek's
+  // Anthropic-compatible endpoint 400s with "unknown variant `custom`" (#3905).
+  if (shouldDefaultClaudeToolType(provider, finalFormat, translatedBody.tools, PROVIDERS)) {
     translatedBody.tools = defaultClaudeToolType(translatedBody.tools);
   }
 
@@ -416,7 +420,7 @@ export async function handleChatCore({ body, modelInfo, credentials, log, onCred
   const executeWithPoolFallback = async (attempt = 0) => {
     let result;
     try {
-      result = await executor.execute({ model, body: translatedBody, stream, credentials, signal: streamController.signal, log, proxyOptions });
+      result = await executor.execute({ model, body: translatedBody, stream, credentials, providerSessionId: sessionSeed, clientTool, signal: streamController.signal, log, proxyOptions });
     } catch (error) {
       if (error?.poolScoped && typeof resolveProxyConfig === "function" && attempt < MAX_POOL_RETRIES) {
         if (await tryNextPool(error.poolScoped, error.message)) return executeWithPoolFallback(attempt + 1);
@@ -497,7 +501,17 @@ export async function handleChatCore({ body, modelInfo, credentials, log, onCred
           try { await onCredentialsRefreshed(newCredentials); } catch (e) { log?.warn?.("TOKEN", `onCredentialsRefreshed failed: ${e.message}`); }
         }
         try {
-          const retryResult = await executor.execute({ model, body: translatedBody, stream, credentials, signal: streamController.signal, log, proxyOptions });
+          const retryResult = await executor.execute({
+            model,
+            body: translatedBody,
+            stream,
+            credentials,
+            providerSessionId: sessionSeed,
+            clientTool,
+            signal: streamController.signal,
+            log,
+            proxyOptions,
+          });
           if (retryResult.response.ok) {
             providerResponse = retryResult.response;
             providerUrl = retryResult.url;
@@ -556,7 +570,7 @@ export async function handleChatCore({ body, modelInfo, credentials, log, onCred
 
   // Streaming response
   const { onStreamComplete, streamDetailId } = buildOnStreamComplete({ ...sharedCtx });
-  return handleStreamingResponse({ ...sharedCtx, providerResponse, sourceFormat, targetFormat: providerResponseFormat, userAgent, reqLogger, toolNameMap, customToolNames, streamController, onStreamComplete, streamDetailId });
+  return handleStreamingResponse({ ...sharedCtx, providerResponse, sourceFormat, targetFormat: providerResponseFormat, userAgent, reqLogger, toolNameMap, customToolNames, streamController, onStreamComplete, streamDetailId, credentials });
 }
 
 export function isTokenExpiringSoon(expiresAt, bufferMs = 5 * 60 * 1000) {