refactor(acp): route goose2 through goose serve

[baxen]

Summary

Move goose2 toward a thinner ACP client by routing session lifecycle through goose serve instead of keeping provider/runtime behavior in the Tauri app.

What changed

• add a shared Goose ACP manager that owns one long-lived goose serve connection
• route prepare, send, cancel, and provider discovery through that manager
• start goose serve on demand and bind streamed session events back to the local chat session
• support provider switching, including switching back to goose
• hide deprecated direct CLI providers from the goose2 provider picker
• add a shared local goose-dev checkout helper so just setup can build the integration branch and just dev can cheaply detect when setup needs to be rerun
• update ACP command/frontend plumbing to use the new provider discovery and session prep flow

Testing

• cd src-tauri && cargo clippy --all-targets --all-features -- -D warnings
• cd src-tauri && cargo test
• pre-push hook passed:
  • pnpm check
  • pnpm typecheck
  • pnpm build
  • pnpm test
  • cd src-tauri && cargo check
  • cd src-tauri && cargo clippy -- -D warnings

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Honor cancel requests during session preparation

cancel_session_inner bails out when the composite key is not yet present in state.sessions, but that map is populated only after prepare_session_inner finishes creating/loading the Goose session. If a user hits Stop while preparation is still in flight, cancellation returns false and the prompt can still execute server-side (including token/tool work) despite the stop request. Please persist a pending-cancel state before preparation completes, or register the session key earlier so cancellation can be applied immediately.

Useful? React with 👍 / 👎.

[chatgpt-codex-connector]

Stop script when branch resolution fails

resolve_branch is invoked via command substitution in read -r branch remote_head <<<"$(resolve_branch)", so exit inside fail_or_skip only terminates the subshell, not the main script. When branch resolution fails, the script can continue with empty values and fall into later commands (for example git fetch with an empty ref), producing unexpected failures and bypassing the intended fail/skip control flow. Capture the function status explicitly and abort in the caller instead of relying on exit inside command substitution.

Useful? React with 👍 / 👎.