Backlog: O9 done 3ec96ad1b0bb

- [x] O7 Shell completions (`oxy completions bash|zsh|fish`) and man pages generated from clap.

- [x] O8 Git round trip on real history: import a scratch mirror of tetriblox (never the live repo), export it back, compare trees at every commit.

- [ ] O11 Line placement found by O8: in 5 of 539 tetriblox commits (all non-merge; e.g. 43de61fac554 src/banked/code_bank_07.c, 021ad78791a2 code_bank_03.c, 2721670b49af code_bank_02.c, 435fbe1d5fac scripts/x16_unchanged.py, d17c19b22748 test/test_memory_guards.py) one line lands elsewhere than in Git with no conflict reported, so an insertion is anchored between atoms that are not adjacent in the base. Reproduce with `oxy git verify` on a scratch mirror; find which edit of the importer's diff (build_from_entries/text_edits) anchors non-adjacently, add a debug assertion for anchor adjacency, fix, re-verify.

## Log

- 2026-09-28 H7 done: stars (toggle, counts), watcher counts on the overview, repository topics in settings (validated) shown as chips, Explore filter by text and topic and sort by activity/stars/name with per-row stars and topics; migration 0010. Tests: topic parsing unit test and `stars_topics_and_explore`. Gate fully green before commit; deployed.

- 2026-09-28 O8 done. `oxy git verify GIT_DIR` checks an import commit by commit (content, exec bits, symlinks, pins; conflicts named with their changes; first differing line). On a scratch mirror of tetriblox (539 commits, 208 merges, 880 gitlinks; the live repo was only read by `git clone --mirror`): import 36 s, tip tree round-trips exactly, and verification found **real core bugs that also affect ordinary commits**, now fixed: (1) insert after a line, then delete that line, left a delete/insert conflict (deletions now depend on the inserters of the lines right after them); (2) a binary or submodule reverted to an earlier blob lost it, and replacements had no dependency (now depend on the change that set their old blob; causal supersession, legacy records keep the old rule); (3) merges of independently replaced binaries/submodules stayed conflicted (importer resolves to the merge's blob). Mismatching commits went from 50+ (verification stopped early) to 5, now O11. Tests: 3 regressions (sequential insert/delete, binary revert, Git binary merge + verify). Spec Draft 0.8i §8.1, §9.3, §23. Hub redeployed.

- 2026-09-28 H8 done: open counts on the Proposals and Issues tabs (from the repository lookup), issue `author:` filter and sorts (newest/oldest/updated/comments), proposal filter (`author:`, `label:`, `target:`, words) with labels shown and sorts (updated/newest/oldest), 25-per-page pager keeping filter and sort. Test `lists_filter_sort_page_and_count`; spec §6.3 rows; deployed.