The zellij wrapper (functions/zellij.fish) rewrote every `zellij`
invocation as `zellij options --theme catppuccin-mocha <args>`, which is
only valid for launching a new session. This mangled every subcommand,
including the `zellij action dump-screen` call inside _zellij_dump_log,
so no logs were ever produced. The theme is already set in config.kdl,
making the wrapper redundant — remove it.
Also harden _zellij_dump_log:
- dump-screen takes the file via stdout redirect, not a positional arg
(rejected by zellij 0.44) nor --path (server-side write, flaky)
- add --ansi to preserve color in the logs
- discard empty dumps instead of leaving junk files
Document the structural limitation: zellij can only snapshot on a clean
shell exit, unlike tmux's continuous pipe-pane stream. Closing a pane or
quitting zellij tears down the pane/server before it can be dumped.
Zellij has no live-stream facility like tmux pipe-pane, so capture is a
one-shot 'zellij action dump-screen --full' run from a fish_exit handler
(conf.d/zellij-logging.fish -> functions/_zellij_dump_log.fish). The C5
guard is checked inside the helper at exit time, so toggling logging
needs no sync_logging coordination — there is no persistent stream.
Extract pruning into functions/_prune_terminal_logs.fish, shared by both
the tmux and zellij helpers. This also fixes a latent bug in the tmux
helper: globbing tmux_*.log directly errored with 'No matches for
wildcard' on the first log in an empty dir. The shared helper globs via
'set' (tolerates no-match) and uses command ls/rm to bypass the eza and
trash C1 shadows.