v0.19.0

A stacked-branch workflow: see the tree, reparent a branch, and sync only what you pick.

Breaking

• wtm sync no longer syncs everything by default: pass branch names, pick them interactively, or use --all.

Added

• wtm tree shows the forest of worktrees, flagging a child that needs a rebase with ⚠ needs sync.
• wtm tree --with-prs adds PR state; --output mermaid prints a flowchart to paste into a PR.
• wtm reparent <branch> --to <parent> changes a worktree's parent; the rebase happens on the next wtm sync.
• wtm clean offers to reparent the children it would orphan onto the grandparent, or --reparent-children.
• wtm sync without arguments opens a multi-select picker.

Changed

• wtm sync always refreshes the base first, and exits 11 on an unknown branch.
• Output has the same spacing and loader across commands; no spinner or \r reaches a pipe.

Fixed

• A fast task's first output is no longer lost.