feat: fix engine (Phase 1.6) + git-aware mv + windows-safe path output
- Edit engine: generic span edits (replace/insert/delete) with stale-index
guard; mv and fix share one atomic apply/rollback/diff/--json pipeline
- jmove mv|check|fix commands; java rules: unused-import, missing-import
(unique-FQN insert, ambiguous -> candidates for agents), import-order
(google style; cross-rule byte conflicts prune by severity and converge)
- mv of tracked files goes through git mv (staged rename, --no-git opt-out,
moved_via/would_move_via in --json, GIT_ERROR code)
- fix java extract_package losing single-segment packages (bare identifier,
not scoped_identifier) — broke the FQN index for 'package p;' projects
- core::rel_str: project-relative paths rendered with '/' on every platform
(human/JSON/diff headers/git pathspecs), Path::display() no longer used
for output; e2e fixtures: java/fix, java/fix_missing, java/order
loki5512344
9dda5f4562
