Refactor terminal API to support incremental output streaming

[Copilot]

The terminal API required collecting all outputs into arrays before passing to addReplOutput() and setExecResult(), despite outputs being available incrementally from the runtime.

API Changes

REPL outputs:

• addReplCommand(terminalId, command) creates command entry, returns commandId
• addReplOutput(terminalId, commandId, output) appends single output to command
• commandId field added to ReplCommand interface (optional for compatibility)

Execution outputs:

• clearExecResult(filename) clears outputs before execution
• addExecOutput(filename, output) appends single output to execution result
• Replaces setExecResult(filename, output[])

Usage Example

Before:

const outputs: ReplOutput[] = [];
await runCommand(cmd, (output) => {
  outputs.push(output);
});
addReplOutput(terminalId, command, outputs);

After:

const commandId = addReplCommand(terminalId, command);
await runCommand(cmd, (output) => {
  addReplOutput(terminalId, commandId, output);
});

Implementation Notes

• commandId generated as simple sequential counter per terminalId (0, 1, 2, ...)
• Command lookup uses findIndex() on commandId for correctness over performance optimization
• Counter is reset when pathname changes along with other terminal data
• Removes TODO comments about API limitations in repl.tsx and exec.tsx

Original prompt

app/terminal/embedContext.tsxのAPIを非同期処理に対応したい。現在は addReplOutput(terminalId, command, output) と setExecResult(filename, output) でoutputを1つのarrayで渡さなければいけませんが、それを使用する箇所(repl.tsxとexec.tsx)ではoutputは逐次取得できるようになっており、それをわざわざarrayにまとめる必要が生じています。
addReplCommand(terminalId, command) -> commandId
addReplOutput(terminalId, commandId, output) // 複数回呼んで追加可能
clearExecResult(filename) // filenameに関連付けられたoutputをクリア
addExecOutput(filename, output) // 複数回呼んで追加可能
のようなAPIに変更してください。

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	my-code	7819c2f	Commit Preview URL Branch Preview URL	Feb 07 2026, 03:33 AM

[na-trium-144]

@copilot commandIdはterminalIdごとにシンプルな連番にしてください。

[Copilot]

commandIdをterminalIdごとの連番（0, 1, 2, ...）に変更しました。(7819c2f)