feat(repo-sync): one local tree for every repo reachable on your forges

bin/repo-sync ports the Alphalink dotfiles repo/repo-reset zsh functions to
bash + zsh on Linux and macOS, for several forges at once: GitLab, GitHub
(+GHES), Gitea/Forgejo, Bitbucket Cloud, via curl + jq (no per-forge CLI).
Tokens live in ~/.config/repos/forges.conf (0600, parsed line by line, never
tracked), written by `repo-sync add`. Cache ~/.cache/repos/list refreshed
at most once a day (mkdir lock: flock is not on macOS), same namespace/project
on two forges kept once, archived and mirrors skipped. Layout
~/repos/<namespace with / as @>/<project>.

rc files: `repo <project> [namespace]` clones on demand and cd's, with
completion (bash compgen, zsh _describe), background refresh at shell start.
install.sh: jq in the apt and brew lists, chmod repo-sync.

Verified: shellcheck + bash -n, zsh -n; stub-curl harness over the four forges
(pagination, dedup, auth headers, lock, stale cache, path/clone); live GitLab
refresh (139 projects, 3s).

.claude/memory/journal.md

@@ -114,3 +114,6 @@ Done: MouseDrag1Pane binding had `\"` inside '...' (literal since tmux 3.0); bra
 
 ## 2026-10-07 — tmux dim inactive panes
 Done: window-style / window-active-style added. Two traps: colour234 ≈ iTerm2 dark bg (#15191f) → invisible; `window-active-style bg=default` inherits window-style since tmux 3 → active pane dimmed too, terminal colours hardcoded instead (fg #dcdcdc, bg #15191f). Inactive settled at #353d48 / #a6acb6 after 3 live rounds. Light macOS theme would need the inverse. Merged feature/tmux-dim-inactive-panes → develop.
+
+## 2026-10-07 (pm) — repo-sync: multi-forge repo tree
+Done: `bin/repo-sync` (gitlab/github/gitea/bitbucket cloud via curl+jq, daily cache, mkdir lock, dedup ns/project) + `repo` fn/completion in 3 rc files + install.sh jq + docs. Port of Alphalink dotfiles `repo`/`repo-reset`. Stub-curl harness caught token shift (IFS tab merges empty field); live GitLab 139 projects in 3s. Decided (chat): name `repo-sync`, tokens in `~/.config/repos/forges.conf` 0600, root `~/repos`, Bitbucket Cloud only. On feature/repo-sync, not finished. BDR/LRN offered, not written.