v0.4.0

Added

• fish shell support (pwdtintii.plugin.fish, requires fish 3.5+) — a full
  native port: resolves identical directory keys, families, shades, and registry
  hashes as the bash/zsh plugins and emits byte-identical OSC-11 hex. Shares the
  same per-dir PID registry, so a fish pane and a bash/zsh pane in the same
  directory still get distinct shades. fzf commands (pt view, the picker, the
  hub) force SHELL=/bin/sh so fzf's POSIX binds run correctly. Opt-in aliases
  in examples/aliases.fish; install is a manual source line. Pinned by a new
  tests/fish.bats (19 tests) that compares fish output against bash.
• tmux per-pane tinting — when $TMUX is set, the tint is applied with
  tmux select-pane -P "bg=#..." instead of the global OSC-11 sequence, keeping
  each pane's color isolated (OSC 11 would colour the whole terminal, so multiple
  panes in one window would fight over a single background). pt off resets the
  pane style (bg=default). Known limitation: the fzf live-preview tint (while
  the picker or viewer is open) still uses OSC 11 even inside tmux; the
  steady-state prompt path is per-pane, and the background snaps back to per-pane
  when the picker closes.
• pt view — a merged list+preview browser: an fzf picker over the families
  with a colored preview pane that ctrl-t cycles through swatch and contrast
  views across the dark and light palettes. Read-only — it previews; pt pick
  pins. Reachable from the pt menu and as ptview.
• APCA in pt contrast — each shade is now scored against the theme text in
  APCA Lc alongside the WCAG ratio. The colored contrast view paints the scores
  in each shade's best-readable foreground (the tone the engine recommends).

Changed

• The pt pick and pt view fzf menus are high-contrast over the live tint: the
  family list is colored per-line (--ansi) in a tone that contrasts the tinted
  background — light on the dark palette, dark on the light one — so a ctrl-t
  toggle reflows the list in place and the focused row is a legible pill.
  Previously the list inherited the terminal's ANSI foreground, with no
  guaranteed contrast against the tint.
• The pt pick ctrl-t dark/light toggle is flicker-free: it reloads the list,
  preview, and header in place instead of restarting fzf (which redrew the whole
  screen).
• The pt hub menu adapts to the terminal width: the list pane is sized to its
  widest action row so the glosses are no longer ellipsized, and the description
  preview reflows to fill its pane instead of being hard-wrapped (the ↳
  markers). On a terminal too narrow to fit both side by side, the preview stacks
  below the list so each keeps the full width.

Removed

• scripts/preview.sh — the static palette dump is folded into pt view's
  colored browser. pt preview stays as a back-compat alias for pt view.

Fixed

• The ctrl-t dark/light flip in pt pick and pt view now repaints the
  terminal background together with the list and swatches instead of lagging a
  keystroke behind (the background used to catch up only on the next arrow key).
  The live tint is routed through fzf's coordinated execute-silent, not a raw
  OSC write during the transform, which fzf's renderer dropped.
• Closing the picker or viewer (ENTER/ESC) no longer flashes the terminal's
  default background: fzf renders inline (sub-100% height), so its exit never
  repaints the whole frame.
• After a ctrl-t toggle to the other group, committing a pick no longer
  disables the ctrl-t toggle on the next pt pick. The plugin compares palette
  paths by inode (-ef, matching the CLI), so a committed PWDTINTII_PALETTE in
  a bin/.. or symlinked form is still recognized as the bundled palette.
• The prompt hook preserves $?, so a prompt that shows the last command's exit
  status (zsh %?, or a bash prompt reading a captured $?) is no longer reset
  to success on every command by the background emit.
• A PROMPT_COMMAND array (bash 5.1+) no longer double-registers the hook and
  emits OSC 11 twice per prompt — the install now scans every element.
• A custom palette or overrides file without a trailing newline keeps its last
  row instead of silently dropping it.
• The zsh plugin runs cleanly under a user's setopt nounset, matching the bash
  plugin under set -u.