fix: ensure fish is launched as login shell in first window

The SSH agent wasn't properly initializing in the first tmux window becausefish wasn't being launched as a login shell. This caused the condition status is-login to fail, preventing wsl2-ssh-agent from running.

README.md

@@ -187,6 +187,8 @@ tmux attach    # Then press Ctrl+Space, Shift+I
 | `Ctrl + Shift + Q` | Close WezTerm window    |
 | `Ctrl + Shift + M` | Minimize WezTerm window |
 
+> Tip: use `fish_add_path /some/path/bin` to add directories to $PATH. See: https://fishshell.com/docs/current/cmds/fish_add_path.html
+
 ## License
 
 [![CC BY-NC-SA 4.0][cc-by-nc-sa-image]][cc-by-nc-sa]

wsl/.config/fish/config.fish

@@ -21,6 +21,8 @@ if status is-interactive
 end
 
 # Configure ssh-agent for WSL, see: https://github.com/mame/wsl2-ssh-agent
-set -x SSH_AUTH_SOCK /home/user/.ssh/wsl2-ssh-agent.sock
+if status is-login
+  /usr/sbin/wsl2-ssh-agent | source
+end
 
-starship init fish | source
+starship init fish | source

wsl/.config/tmux/tmux.conf

@@ -61,7 +61,7 @@ set-window-option -g window-status-current-style bg=default
 
 # Create a single default session - because a session is created here, tmux
 # should be started with "tmux attach" rather than "tmux new"
-new -d -s1 -nfish 'fish'
+new -d -s1 -nfish 'fish -l'
 set -t1:1 monitor-activity on
 set  -t1:1 aggressive-resize on
 neww -d