Fix SketchyBar workspace indicators not appearing after 25.11 upgrade

Add explicit `drawing=on` to all workspace item states (initial creation,
focused, non-empty, and empty) to prevent items from getting stuck with
`drawing=off`. With `updates=when_shown`, items with `drawing=off` never
run their update scripts, causing workspaces that start empty to never
appear even when focused or given windows.

Changes:
- Add drawing=on to initial workspace creation (line 393)
- Add drawing=on to focused workspace state (line 568)
- Add drawing=on to empty workspace state (line 582)
- Add drawing=on to non-empty workspace state (line 591)
- Update comment for empty workspace to explain drawing=on usage

This ensures workspace indicators automatically appear within 2 seconds
when focused or given windows, without needing manual `sketchybar --update`.

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

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

home/roles/aerospace/default.nix

@@ -390,6 +390,7 @@ in
             ${pkgs.sketchybar}/bin/sketchybar --add item space.$sid left \
                 --subscribe space.$sid aerospace_workspace_change \
                 --set space.$sid \
+                    drawing=on \
                     update_freq=2 \
                     width=32 \
                     background.color=$ITEM_BG \
@@ -565,6 +566,7 @@ in
         if [ "$IS_FOCUSED" = "true" ]; then
             # Focused workspace - always show with focused styling
             ${pkgs.sketchybar}/bin/sketchybar --set space.$WORKSPACE_NUM \
+                drawing=on \
                 icon="$DISPLAY" \
                 width=32 \
                 icon.padding_left=13 \
@@ -575,8 +577,9 @@ in
                 icon.color=$TEXT
         elif [ "$IS_EMPTY" = "true" ]; then
             # Empty workspace (not focused) - hide by collapsing width and clearing content
-            # Using width=0 + empty icon/label instead of drawing=off because drawing=off doesn't reliably re-show items
+            # Using width=0 with drawing=on so updates=when_shown continues to run the script
             ${pkgs.sketchybar}/bin/sketchybar --set space.$WORKSPACE_NUM \
+                drawing=on \
                 icon="" \
                 label="" \
                 width=0 \
@@ -586,6 +589,7 @@ in
         else
             # Non-empty workspace (not focused) - show with inactive styling
             ${pkgs.sketchybar}/bin/sketchybar --set space.$WORKSPACE_NUM \
+                drawing=on \
                 icon="$DISPLAY" \
                 width=32 \
                 icon.padding_left=13 \