fix(worktree): resolve real remote+default branch, not hardcoded origin/main (INT-2545)

[unohee]

Summary

The daemon could not do code work on entire repos. createWorktree() + commitAndCreatePR() hardcoded origin/main everywhere, so any repo that doesn't match BOTH assumptions failed at the very first step:

• default branch is master (pykiwoom-rest, ArtifactNet) → git worktree add … origin/main died with fatal: invalid reference: origin/main → worktree creation failed → the issue could never be worked. This was the dominant daemon error in the live logs (every STO-* task stuck).
• remote isn't named origin (vega-agent uses unohee) → same failure.

Fix

resolveBaseRef(gitDir) resolves {remote, branch, ref}: prefer <remote>/HEAD, fall back to main then master; pick origin if present else the first configured remote. Wired through the whole create → commits-ahead → push → PR chain and the overlap report, so master-default and non-origin repos work end to end (branch from the real base, push to the real remote, PR against the real base branch).

Tests

• resolveBaseRef over origin/main, origin/master, and a non-origin (unohee) remote
• createWorktree succeeds on a master-default repo and a non-origin repo (both previously fataled)
• commitAndCreatePR (fake gh on PATH) pushes to the resolved remote and PRs against the resolved base — proving completed work isn't stranded

tsc + oxlint clean, full suite 148 files / 1760 passed / 1 skipped, openswarm review APPROVE.

Context

Found while fixing OpenSwarm so the daemon actually does code work (/goal session). This is the #1 reason the pykiwoom-rest/ArtifactNet/vega-agent In Progress issues weren't being processed. Related: INT-2545 (orphan branches), INT-2548 (ENOSPC crash), INT-2521 (exception handling).

🤖 Generated with Claude Code

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