spec: configurable code editor line number modes

[oz-for-oss]

Summary

• Add a product spec for configurable Absolute, Relative, and Hybrid code editor line numbering modes.
• Add a tech spec grounding the implementation in AppEditorSettings, the Settings > Text Editing UI, and the CodeEditorView/EditorWrapper gutter rendering path.
• Scope terminal input, AI input, and notebook editors out because they do not currently render line-number gutters.

Validation

• Spec-only change; reviewed generated product and tech spec contents.

Related issue: #9816

[oz-for-oss]

@oz-for-oss[bot]

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[oz-for-oss]

Overview

The specs define product behavior and a concrete implementation approach for Absolute, Relative, and Hybrid code editor line-number modes, covering persistence, settings UI placement, gutter rendering, diff/review behavior, and excluded editor surfaces.

Concerns

• The tech spec is internally inconsistent about telemetry: it requires adding telemetry mapping for the settings action while later stating the spec does not require new telemetry.

Verdict

Found: 0 critical, 1 important, 0 suggestions

Request changes

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[narley]

@oz-agent start implementation

[oz-for-oss]

@narley

I ran into an unexpected error while working on this.

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