Completion while typing not working

從 Core/Sources/KeyBindingManager/TabToAcceptSuggestion.swift 開始，這是 logs 中提到的唯一原始檔，並將回報的 streamChoices 與 ghostText 訊息和 completion 流程進行比較。使用列出的 Copilot for Xcode、Xcode 和 macOS 版本重現此問題；當輸入時會出現 completion 建議，且可以正常接受時，即表示完成。

Describe the bug

Versions

• Copilot for Xcode: 0.44.151
• Xcode: 26.2
• macOS: 26.1

Completion while typing is not working, with the following logs

[2025-11-12T02:52:44.767Z] [info] [GitHubCopilot] [90407] window/logMessage: {
"message" : "[streamChoices] choice { text: '\n', index: 1, finish_reason: null }",
"type" : 4
}
[2025-11-12T02:52:44.767Z] [info] [GitHubCopilot] [90407] window/logMessage: {
"message" : "[streamChoices] choice { text: '\t', index: 1, finish_reason: 'stop' }",
"type" : 4
}
[2025-11-12T02:52:44.767Z] [info] [GitHubCopilot] [90407] window/logMessage: {
"message" : "[streamChoices] solution 1 returned. finish reason: [stop]",
"type" : 3
}
[2025-11-12T02:52:44.767Z] [info] [GitHubCopilot] [90407] window/logMessage: {
"message" : "[streamChoices] solution 1 details: finishOffset: [undefined]",
"type" : 4
}
[2025-11-12T02:52:44.769Z] [info] [GitHubCopilot] [90407] window/logMessage: {
"message" : "[streamChoices] chunk data: [DONE]\n\n",
"type" : 4
}
[2025-11-12T02:52:44.769Z] [info] [GitHubCopilot] [90407] window/logMessage: {
"message" : "[streamChoices] request done: headerRequestId: [de272066-308c-4643-9fb4-0b5478083229] model deployment ID: []",
"type" : 4
}
[2025-11-12T02:52:44.769Z] [info] [GitHubCopilot] [90407] window/logMessage: {
"message" : "[streamChoices] request stats: ChunkStats {\n choices: Map(3) {\n 0 => ChoiceStats { yieldedTokens: 3, seenTokens: 3 },\n 1 => ChoiceStats { yieldedTokens: 3, seenTokens: 3 },\n 2 => ChoiceStats { yieldedTokens: 3, seenTokens: 3 }\n }\n}",
"type" : 4
}
[2025-11-12T02:52:44.769Z] [info] [GitHubCopilot] [90407] window/logMessage: {
"message" : "[ghostText] Produced 0 results from cycling at -1 offset",
"type" : 4
}
[2025-11-12T02:52:44.769Z] [info] [GitHubCopilot] [90407] didChangeStatus: {
"kind" : "Normal",
"busy" : false
}
[2025-11-12T02:52:44.770Z] [info] [GitHubCopilot] [90407] window/logMessage: {
"message" : "[getCompletions] No ghostText produced -- empty: no completions in final result",
"type" : 4
}
[2025-11-12T02:52:50.241Z] [debug] [Service] [90407] TabToAcceptSuggestion: Deactivate.
file: /Users/runner/work/copilot-xcode/copilot-xcode/Core/Sources/KeyBindingManager/TabToAcceptSuggestion.swift
line: 15
function: TabToAcceptSuggestion
[2025-11-12T02:52:50.328Z] [info] [Service] [90407] Extension Service is not updated, no need to quit.