Theme-linked glow and terminal, tabs, fonts and layout tweaks

- Real window glow (decoration.glow) plus borders and tab bar take their
  colours from DMS (hypr/dms/colors.lua); Hyprland reloads when DMS changes
  the theme.
- kitty: colours and tab colours come from DMS (dank-theme/dank-tabs),
  no more hard-coded palette.
- Group (tab) mode: Mod+W tabs the whole workspace, thinner tab bar.
- Fullscreen programs keep the DMS bar (Mod+F maximizes, Mod+Shift+F is real
  fullscreen); per-monitor workspace switching on Mod+Tab.
- Less jelly animations, smaller gaps, weaker glow.
- JetBrains Mono is the default monospace font (fontconfig + install.sh).
- DMS settings: purple theme, popup transparency 0.98.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

kitty/kitty.conf

@@ -36,6 +36,8 @@ copy_on_select clipboard
 strip_trailing_spaces smart
 
 # ---------- Tabs ----------
+# DMS tab colours; the layout lines below are mine and override its layout (kitty does not allow comments after include)
+include dank-tabs.conf
 tab_bar_edge top
 tab_bar_style powerline
 tab_powerline_style round
@@ -53,7 +55,6 @@ inactive_text_alpha 0.75
 window_border_width 1pt
 
 # ---------- URLs ----------
-url_color #7dcfff
 url_style curly
 detect_urls yes
 underline_hyperlinks hover
@@ -63,40 +64,15 @@ enable_audio_bell no
 visual_bell_duration 0.15 ease-out
 window_alert_on_bell yes
 
-# ---------- Colors: Tokyo Night Storm tuned for glass ----------
-foreground            #c0caf5
-background            #11111b
-selection_foreground  #11111b
-selection_background  #bb9af7
-cursor                #ff9e64
-cursor_text_color     #11111b
-url_color             #7dcfff
+# ---------- Colors: from DankMaterialShell ----------
+# dank-theme.conf is regenerated by DMS on every theme change; tab colours come from dank-tabs.conf (included above the tab section)
+include dank-theme.conf
 
-active_tab_foreground    #11111b
-active_tab_background    #bb9af7
-inactive_tab_foreground  #a9b1d6
-inactive_tab_background  #1f2335
 tab_bar_background       none
 
 mark1_foreground #11111b
 mark1_background #ff9e64
 
-color0  #414868
-color8  #565f89
-color1  #f7768e
-color9  #ff899d
-color2  #9ece6a
-color10 #b9f27c
-color3  #e0af68
-color11 #ffc777
-color4  #7aa2f7
-color12 #8db0ff
-color5  #bb9af7
-color13 #c9a9ff
-color6  #7dcfff
-color14 #a4daff
-color7  #a9b1d6
-color15 #c0caf5
 
 # ---------- Shortcuts ----------
 # Plain Ctrl+C / Ctrl+V: Ctrl+C copies when text is selected, otherwise it is the usual interrupt (SIGINT)