The overlay pinned project_path to the worktree root. For a repo whose Maven
module is a subdir (this repo's pom is in `bridged/`, not at the root), opening
the root imports no module and every ide_* call resolves nothing. Pin and open
the module dir instead.
Two new opt-in per-Profile keys, both read only when ideMcpUrl is set:
- ideProjectDir: repo-relative module dir the IDE opens and the overlay pins;
blank keeps the old worktree-root behaviour.
- ideOpenCommand: host command that opens that dir in the IDE at spawn, with
{dir} substituted and run through /bin/sh -c so env (e.g. DISPLAY) can be set
inline. Best-effort and non-fatal — a failure never fails the spawn. Blank
keeps the manual-open behaviour. No close half yet (deferred).
Shared helpers PeerLauncher.ideProjectPath / openInIde back both launchers.
The two Profile fields ride a back-compat constructor, so every existing call
site and YAML compiles and behaves unchanged.
Tests: overlay content pins the module dir when ideProjectDir is set;
ideProjectPath resolution; openInIde no-op on a blank command. 918 tests green.
Dai Ha
7655f1b51a