fix(zellij): repair scrollback logging on shell exit

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.

functions/_zellij_dump_log.fish

@@ -34,7 +34,12 @@ function _zellij_dump_log --description 'Dump the current Zellij pane scrollback
     set -l log_file "$log_dir/zellij_"$session"-p"$pane_id"_"$timestamp".log"
 
     mkdir -p $log_dir
-    zellij action dump-screen --full "$log_file" 2>/dev/null
+    # Dump to STDOUT and let this fish process write the file. `--path` makes the
+    # zellij *server* write the file (its CWD/permissions, historically flaky);
+    # capturing STDOUT keeps the write client-side and reliable. Drop the empty
+    # file if the dump produced nothing (e.g. pane already torn down on exit).
+    zellij action dump-screen --full --ansi >"$log_file" 2>/dev/null
+    test -s "$log_file"; or command rm -f "$log_file"
 
     _prune_terminal_logs zellij
 end

functions/zellij.fish

@@ -1,19 +0,0 @@
-# Copyright (C) 2026 Rootiest
-# SPDX-License-Identifier: AGPL-3.0-or-later
-
-# SYNOPSIS
-#   zellij [args...]
-#
-# DESCRIPTION
-#   Launches zellij with the Catppuccin Mocha theme applied via
-#   --theme catppuccin-mocha.
-#
-# ARGUMENTS
-#   args...  Arguments forwarded to zellij
-#
-# EXAMPLE
-#   zellij
-function zellij --wraps='zellij' --description 'alias zellij=zellij options --theme catppuccin-mocha'
- command zellij options --theme catppuccin-mocha $argv
-        
-end