🤖 feat: configurable Coder workspace action on archive (keep/stop/delete)

[ibetitsmike]

Summary

Replaces the boolean stopCoderWorkspaceOnArchive setting with a "keep" | "stop" | "delete" enum, giving users control over what happens to dedicated Coder workspaces when archiving a chat.

Closes #3042

Background

Previously, archiving a chat could only stop or leave running the associated Coder workspace. Users want the option to delete the workspace entirely on archive, freeing up resources automatically.

Implementation

• Shared type (src/common/config/coderArchiveBehavior.ts): new CoderWorkspaceArchiveBehavior union type, values array, and default constant.
• Config layer: new coderWorkspaceArchiveBehavior field on disk schema + in-memory config. Normalization resolves new enum → legacy boolean fallback → "stop" default. Save writes a legacy boolean shim for downgrade safety ("keep" → false, "stop"/"delete" → omit).
• Lifecycle hooks: renamed createStopCoderOnArchiveHook → createCoderArchiveHook with behavior dispatch: keep no-ops, stop preserves existing behavior, delete calls coderService.deleteWorkspace(). Unarchive only auto-starts for stop; keep and delete no-op (deleted workspace is safely handled via existing not_found guard).
• ORPC: schemas and router updated to coderWorkspaceArchiveBehavior enum.
• Settings UI: replaced Switch with Select dropdown ("Keep running" / "Stop workspace" / "Delete workspace") using existing SelectPrimitive pattern.

Risks

• The delete path is more destructive than stop. Mitigated by clear label copy ("Delete workspace") and description noting permanence.
• Downgrade safety relies on the legacy boolean shim; older builds reading a config saved by this version will see stop or keep behavior correctly.

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[ibetitsmike]

@codex review

[chatgpt-codex-connector]

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[ibetitsmike]

@codex review

Fixed the P1: simplified resolveCoderWorkspaceArchiveBehaviorForSave() so the explicit enum field is authoritative when present. Legacy boolean fallback now only applies for old configs that lack the enum field entirely. Added regression test.

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Another round soon, please!

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