feat(sessions): record interactive-only errors and warnings to chat recording JSON files

[bl-ue]

This PR implements recording of interactive-only messages (e.g. ℹ Request cancelled. and ✕ [API Error: ...]), and makes the /clear command start a new chat recording session so that subsequent messages are written to a new JSON file.

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Note: This PR is the 5th in a series of PRs that implement automatic chat recording and resuming in both interactive and non-interactive modes, with command line flags for non-interactive resuming and session management, and an interactive session browser.

PR #4401 was the original monolithic PR, which implemented this feature from the ground up. It's too large to merge as-is, however, and so it was broken up into several smaller PRs, of which this PR is the 5th.

Please see #4401's description for the full context of this PR. The original monolithic PR's description contains a detailed analysis of the entire system, with an example of the recording JSON and a demo video.

[gemini-code-assist]

Summary of Changes

Hello @bl-ue, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the chat recording functionality by ensuring that the /clear command properly starts a new recording session, isolating conversation history. It also expands the scope of recorded messages to include interactive-only UI feedback like info, warning, and error messages, providing a more comprehensive log of user interactions. These changes are part of a larger effort to implement robust automatic chat recording and session management.

Highlights

• New Chat Recording Session on Clear: The /clear command now initiates a new chat recording session, ensuring that subsequent messages are saved to a distinct JSON file. This improves session management and data integrity for recorded conversations.
• Interactive-Only Message Recording: The system now records interactive-only messages, such as informational messages (ℹ Request cancelled.), warnings, and API errors (✕ [API Error: ...]), providing a more complete record of the user's interaction experience.
• History Manager Integration: The useHistory hook has been updated to integrate with the ChatRecordingService, allowing it to record UI-specific messages (info, warning, error) when a session is not being resumed.
• Session Resume Behavior: When resuming a session, the addItem function in the history manager now correctly flags messages as being part of a resumed session, preventing them from being re-recorded as new interactive messages.

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[gemini-code-assist]

Code Review

This pull request successfully implements chat recording for UI-specific messages and creates new recording sessions upon using the /clear command. The changes are well-structured and cover session resumption and browser compatibility. However, I found a critical issue in slashCommandProcessor.ts where adding a new parameter to handleSlashCommand has broken the argument passing for recursive calls, which affects commands requiring user confirmation. This needs to be addressed to prevent regressions in functionality.

[bl-ue]

Next: #13351