v0.16.0

Added

• A fresh worktree now sets itself up. Creating a worktree copies the
  gitignored .env* files over from the main checkout — a worktree starts
  with tracked files only, so env files and local credentials were always
  missing from a new checkout. A .worktreeinclude file at the repository
  root overrides the patterns (globs, one per line; a slashless pattern
  matches by basename at any depth). Wholly ignored directories
  (node_modules, build output) are never copied — installing those is the
  job of the new per-project setup script (Settings › Worktree), which
  runs in the new worktree session's terminal ahead of the agent, so a
  pnpm install happens where you can watch it. The session opens even if
  the script fails, resuming a kept worktree never re-runs it, and Windows
  skips the script wrap while the port stays experimental.

Fixed

• A session spawned directly on a provider now inherits your login shell's
  environment. lich is a GUI app, never started from a terminal, so its env
  snapshot is the graphical session's — it never sourced .zshrc/.bashrc/
  config.fish/.profile. A shell session hid this (the spawned $SHELL
  sources its own rc), but a provider spawned directly (Claude Code, Codex, …)
  saw only the launch env, so a ${VAR} expansion in .mcp.json — e.g. an MCP
  server's auth token exported in your rc — came up empty. lich now resolves the
  shell env once at startup ($SHELL -l -i -c dump) and merges it over the
  launch snapshot, so both provider and shell sessions get the full environment.
  Best-effort: $SHELL unset or any failure keeps the launch env. Windows
  without a $SHELL (env lives in the registry) is not covered.
• Closing a worktree session only prompts to remove the checkout when it is
  the last one there. A worktree can host more than one session — a provider
  plus a hand-opened shell rooted at the same path — and closing the throwaway
  shell offered to remove the whole checkout, so one accidental confirm discarded
  the provider's work. The prompt is now gated on the closing session being the
  last occupant of its worktree path; while a sibling still lives there, closing
  just closes.