keep the shell templates together in scripts/setup

starship.toml, tmux.conf and zshrc side by side. tmux.conf and zshrc moved up out
of machine-setup/.

starship.toml could not have moved down to join them: the PLATFORM reads it, at
src/servers/os-user-shell.ts:34, to deploy to every member's Linux account. That
is a runtime path rather than an import, so moving it would have broken member
provisioning silently — no build error, members simply get no starship config.
So the templates collect where the shared one already had to be.

Left as a marker for tomorrow rather than resolved: there are now TWO zshrc
templates, this one for the owner and shell-skel/zshrc for members, while
starship.toml is deliberately one file for both. Either the owner needs different
shell config from a member or they should be the same file. tmux.conf has the
same question waiting, since it is going into provisioning too. Noted in the
zshrc header where whoever picks it up will be looking.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

scripts/setup/tmux.conf

@@ -0,0 +1,100 @@
+########## TPM AUTO-INSTALL + SESSION PERSISTENCE ##########
+
+# Auto-install TPM if missing
+if-shell '[ ! -d ~/.tmux/plugins/tpm ]' \
+  'run-shell "git clone https://github.com/tmux-plugins/tpm ~/.tmux/plugins/tpm"'
+
+# Plugin list
+set -g @plugin 'tmux-plugins/tpm'
+
+# remap prefix from 'C-b' to 'C-a'
+unbind C-b
+set-option -g prefix C-a
+bind-key C-a send-prefix
+
+set -g base-index 1
+
+# split panes using | and -
+unbind '"'
+unbind %
+bind | split-window -h
+bind - split-window -v
+
+# reload config file (change file location to your the tmux.conf you want to use)
+unbind r
+bind r source-file ~/.tmux.conf \; display-message "Config reloaded!" \; refresh-client -S
+
+# switch panes using Alt-arrow without prefix
+bind -n M-Left select-pane -L
+bind -n M-Right select-pane -R
+bind -n M-Up select-pane -U
+bind -n M-Down select-pane -D
+# switch panes using Alt-HJKL without prefix
+bind -n M-h select-pane -L
+bind -n M-l select-pane -R
+bind -n M-k select-pane -U
+bind -n M-j select-pane -D
+
+# Enable mouse control (clickable windows, panes, resizable panes)
+
+# don't rename windows automatically
+set-option -g allow-rename off
+
+######################
+### DESIGN CHANGES ###
+######################
+
+# loud or quiet?
+set -g visual-activity off
+set -g visual-bell off
+set -g visual-silence off
+setw -g monitor-activity off
+set -g bell-action none
+
+#  modes
+setw -g clock-mode-colour colour12
+setw -g mode-style 'fg=colour1 bg=colour18 bold'
+
+# panes
+set -g pane-border-style 'fg=colour19 bg=colour0'
+set -g pane-active-border-style 'bg=colour0 fg=colour9'
+
+# statusbar
+set -g status-position bottom
+set -g status-justify left
+set -g status-style 'bg=colour2 fg=colour23'
+# set -g status-left '#[fg=white,bg=black,bold] pastilhas #[default]'
+set -g status-left '#[fg=#ffffff,bg=#000000,bold] #{USER}@#H     #[default]'
+# set -g status-left-length 20
+set -g status-right '#[fg=#ffffff,bg=colour1] %d/%m #[fg=#ffffff,bg=colour8] %H:%M:%S '
+set -g status-right-length 50
+set -g status-left-length 20
+
+setw -g window-status-current-style 'fg=colour1 bg=colour19 bold'
+setw -g window-status-current-format ' #I#[fg=colour249]:#[fg=colour255]#W#[fg=colour249]#F '
+
+setw -g window-status-style 'fg=colour9 bg=colour18'
+setw -g window-status-format ' #I#[fg=colour237]:#[fg=colour250]#W#[fg=colour244]#F '
+
+setw -g window-status-bell-style 'fg=colour255 bg=colour1 bold'
+# ...existing code...
+# messages
+set -g message-style 'fg=#ffffff bg=red bold'
+# Change the font color for the exit pane confirmation message
+set -g message-command-style 'fg=#ffffff bg=red bold'
+
+# ...existing code...
+
+# messages
+# set -g message-style 'fg=colour232 bg=colour16 bold'
+
+##########################
+### END DESIGN CHANGES ###
+##########################
+
+##########################
+### EASY MOUSE SCROLL  ###
+##########################
+
+set -g mouse on
+set -ga terminal-overrides ',*256color*:smcup@:rmcup@'