fix(orchestrator): name kvb-git-gc for worktree-held branches

The pkgmgr wrappers replay renamed kvb-git-branch-gc: branch cleanup outside worktrees is now kvb-git-branch-cleanup, and removing merged branches with their worktrees is kvb-git-gc. The hub's held-by-worktree hint, the cleanup dialog and its test now name kvb-git-gc.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

orchestrator/kvb_orchestrator/tree.py

@@ -18,7 +18,7 @@ FLOW_SOURCE = re.compile(r"[a-z][a-z0-9-]{0,31}")
 INVALID = "invalid"
 # renaming it silently stops the tree timer: kvb-orchestrator-tree.service tests this file's age
 TREE_HEARTBEAT = "tree-heartbeat"
-GC_SKILL = "kvb-git-branch-gc"
+GC_SKILL = "kvb-git-gc"
 GC_COMPOSE_DOWN = ("docker", "compose", "-p", "{project}", "down", "-v", "--remove-orphans")
 
 

orchestrator/templates/page-cleanup.js

@@ -29,7 +29,7 @@
       }
     });
     openSheet(items.length > 1 ? `Delete ${items.length} merged branches` : `Delete ${items[0].branch}`, [
-      h("p", {class: "muted"}, "Dry run of pkgmgr branch cleanup for exactly these entries: it deletes the local branch and never touches a worktree, Compose stack or volume. No remote branch: the host refuses an entry whose plan deletes one. A branch held by a worktree is not deleted here: branch gc (kvb-git-branch-gc, pkgmgr gc) removes it, and its docker compose down -v deletes the stack's volumes. The host checks your signature and refuses every entry whose state has changed since."),
+      h("p", {class: "muted"}, "Dry run of pkgmgr branch cleanup for exactly these entries: it deletes the local branch and never touches a worktree, Compose stack or volume. No remote branch: the host refuses an entry whose plan deletes one. A branch held by a worktree is not deleted here: branch gc (kvb-git-gc, pkgmgr gc) removes it, and its docker compose down -v deletes the stack's volumes. The host checks your signature and refuses every entry whose state has changed since."),
       h("ul", {class: "mini", "aria-label": "Dry run"}, rows),
       outcome,
       h("div", {class: "actions"}, h("span", {class: "spacer"}), btn("Cancel", "btn ghost", closeSheet), confirm),