Fix macOS menu bar spacing configuration to use activation scripts

- Replace CustomUserPreferences with system.activationScripts.postUserActivation
- Use defaults -currentHost write commands that actually work
- Corrected values: NSStatusItemSpacing=12, NSStatusItemSelectionPadding=6
- Commands will run during darwin-rebuild to apply host-specific preferences

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

scripts/project-launcher.sh

@@ -97,6 +97,16 @@ create_directory "$PAPER_PATH" "paper"
 [ -n "$CONTENT_PATH" ] && [ "$CONTENT_PATH" != "null" ] && [ -d "$CONTENT_PATH" ] && zoxide add "$CONTENT_PATH" 2>/dev/null || true
 [ -n "$PAPER_PATH" ] && [ "$PAPER_PATH" != "null" ] && [ -d "$PAPER_PATH" ] && zoxide add "$PAPER_PATH" 2>/dev/null || true
 
+# Check if session already exists and attach if it does
+if is_session_running "$SESSION_NAME"; then
+    printf "\033[1;32mAttaching to existing session: %s\033[0m\n" "$SESSION_NAME"
+    tmux attach-session -t "$SESSION_NAME"
+    exit 0
+fi
+
+# Update papis cache
+papis cache reset > /dev/null 2>&1
+
 # Create remote directory if server connection is configured
 if [ -n "$SERVER" ] && [ -n "$REMOTE_DIR" ]; then
     printf "\033[2mEnsuring remote directory exists: %s:%s\033[0m\n" "$SERVER" "$REMOTE_DIR"
@@ -108,16 +118,6 @@ if [ -n "$SERVER" ] && [ -n "$REMOTE_DIR" ]; then
     fi
 fi
 
-# Check if session already exists and attach if it does
-if is_session_running "$SESSION_NAME"; then
-    printf "\033[1;32mAttaching to existing session: %s\033[0m\n" "$SESSION_NAME"
-    tmux attach-session -t "$SESSION_NAME"
-    exit 0
-fi
-
-# Update papis cache
-papis cache reset > /dev/null 2>&1
-
 # Launch appropriate template
 case "$TEMPLATE" in
     "basic")

system/macos-defaults.nix

@@ -1,12 +1,16 @@
 { config, pkgs, ... }:
 
 {
-  system.defaults.NSGlobalDomain = {
-    # Menu bar spacing configuration
+  # Set primary user for system preferences
+  system.primaryUser = "yanlin";
+  
+  # Menu bar spacing configuration using activation scripts
+  # Uses -currentHost to write host-specific preferences
   # NSStatusItemSpacing controls horizontal spacing between menu bar items
   # NSStatusItemSelectionPadding controls padding inside selection overlay
-    # Optimal ratio is 1:2 (spacing:padding)
-    NSStatusItemSpacing = 6;
-    NSStatusItemSelectionPadding = 12;
-  };
+  system.activationScripts.postUserActivation.text = ''
+    echo "Setting menu bar spacing preferences..."
+    defaults -currentHost write -globalDomain NSStatusItemSpacing -int 12
+    defaults -currentHost write -globalDomain NSStatusItemSelectionPadding -int 6
+  '';
 }