Merge pull request 'fix(tmux): stop clip.exe mangling non-ASCII in the WSL clipboard' (#103) from fix/tmux-clipboard-utf8 into main

Reviewed-on: #103

home/shell.nix

@@ -287,7 +287,22 @@ in
     plugins = with pkgs.tmuxPlugins; [
       sensible
       vim-tmux-navigator # Ctrl-h/j/k/l across vim splits and tmux panes
-      yank
+      {
+        # On WSL, tmux-yank pipes the selection to clip.exe, which decodes its
+        # stdin as the OEM codepage instead of UTF-8 -- an em dash reaches the
+        # Windows clipboard as three characters. Route through tmux's own
+        # buffer instead: with set-clipboard on, tmux emits OSC 52 and the
+        # terminal takes the text as UTF-8. Windows Terminal honours OSC 52;
+        # iTerm2 does not by default, hence the runtime guard rather than
+        # overriding pbcopy/xsel on every host. yank.tmux bakes the command
+        # into its key bindings when it loads, so this must be set first, which
+        # is what plugin extraConfig gives us.
+        plugin = yank;
+        extraConfig = ''
+          if-shell 'grep -qi microsoft /proc/version 2>/dev/null' \
+            "set -g @override_copy_command 'tmux load-buffer -w -'"
+        '';
+      }
       extrakto # prefix+Tab: fzf-grab paths/URLs/text from the pane into the prompt
       {
         # Catppuccin Mocha statusline (v2 API: flavour + window options must be