Add selectable PS1 styles

- Implement 5 bold styles and style config

- Prompt for style selection in installers

dotfiles/install/install-linux-global.sh

@@ -25,6 +25,7 @@ install_ps1=1
 install_banner=1
 season_mode="dynamic"
 season_choice=""
+style_choice="aurora"
 if [[ -t 0 ]]; then
   echo "Install options:"
   echo "  1) PS1 only"
@@ -69,6 +70,28 @@ if [[ -t 0 ]]; then
         season_mode="dynamic"
         ;;
     esac
+
+    echo
+    echo "Style presets:"
+    echo "  1) Aurora  - Powerline blocks, seasonal palette, two-line"
+    echo "     Preview: [date time user] > [@host /path]"
+    echo "  2) Neon    - Magenta/cyan cyber blocks, high contrast"
+    echo "     Preview: [user time] > [@host /path]"
+    echo "  3) Forge   - Warm copper blocks, heavy frame"
+    echo "     Preview: [date time user] > [@host /path]"
+    echo "  4) Circuit - Green scanline, minimal rails"
+    echo "     Preview: [user time] - @host /path"
+    echo "  5) Mono    - Clean monochrome, fast read"
+    echo "     Preview: [date time user] @host /path"
+    read -r -p "Choose style [1]: " style_pick
+    case "${style_pick}" in
+      2) style_choice="neon" ;;
+      3) style_choice="forge" ;;
+      4) style_choice="circuit" ;;
+      5) style_choice="mono" ;;
+      ""|1) style_choice="aurora" ;;
+      *) echo "Invalid choice, using aurora."; style_choice="aurora" ;;
+    esac
   fi
 fi
 
@@ -137,9 +160,13 @@ if [[ "$install_ps1" -eq 1 ]]; then
     fi
   } > /etc/ps1-season
   chmod 0644 /etc/ps1-season
+
+  printf 'PS1_STYLE=%s\n' "$style_choice" > /etc/ps1-style
+  chmod 0644 /etc/ps1-style
 else
   rm -f "$DST_PS1"
   rm -f /etc/ps1-season
+  rm -f /etc/ps1-style
 fi
 
 if [[ "$install_banner" -eq 1 ]]; then