Merge branch 'feature/chat-completions-reasoning' into all

Author: caozhiyuan

src/lib/api-config.ts

@@ -14,8 +14,9 @@ const USER_AGENT = `GitHubCopilotChat/${COPILOT_VERSION}`
 const API_VERSION = "2025-10-01"
 
 export const copilotBaseUrl = (state: State) =>
-  `https://api.${state.accountType}.githubcopilot.com`
-
+  state.accountType === "individual" ?
+    "https://api.githubcopilot.com"
+  : `https://api.${state.accountType}.githubcopilot.com`
 export const copilotHeaders = (state: State, vision: boolean = false) => {
   const headers: Record<string, string> = {
     Authorization: `Bearer ${state.copilotToken}`,

src/routes/messages/stream-translation.ts

@@ -218,6 +218,7 @@ function handleContent(
     delta.content === ""
     && delta.reasoning_opaque
     && delta.reasoning_opaque.length > 0
+    && state.thinkingBlockOpen
   ) {
     events.push(
       {
@@ -317,6 +318,15 @@ function handleThinkingText(
   events: Array<AnthropicStreamEventData>,
 ) {
   if (delta.reasoning_text && delta.reasoning_text.length > 0) {
+    // compatible with copilot API returning content->reasoning_text->reasoning_opaque in different deltas
+    // this is an extremely abnormal situation, probably a server-side bug
+    // only occurs in the claude model, with a very low probability of occurrence
+    if (state.contentBlockOpen) {
+      delta.content = delta.reasoning_text
+      delta.reasoning_text = undefined
+      return
+    }
+
     if (!state.thinkingBlockOpen) {
       events.push({
         type: "content_block_start",