Adopt Omarchy 4 theme conventions for Lupine

Convert the Lupine theme to the semantic color system introduced in the
quattro/Omarchy 4 line:

- Rewrite colors.toml from the old accent/foreground/background/color0-15
  scheme to the semantic palette (mode, bg/fg ramp, named ANSI hues, and
  bright_* variants). The chromatic palette is preserved exactly; only the
  keys are renamed.
- Replace the empty light.mode marker with mode = "light".
- Drop the hand-shipped btop.theme and chromium.theme; both are now
  generated from default/themed/*.tpl at theme-set time.

Selection now follows the convention used by the other light themes
(selection_foreground = bright_fg over a light selection background)
instead of the previous inverted dark selection bar.

themes/lupine/btop.theme

@@ -1,93 +0,0 @@
-# Main background, empty for terminal default, need to be empty if you want transparent background
-theme[main_bg]="#fafafa"
-
-# Main text color
-theme[main_fg]="#212121"
-
-# Title color for boxes
-theme[title]="#212121"
-
-# Highlight color for keyboard shortcuts
-theme[hi_fg]="#3264eb"
-
-# Background color of selected item in processes box
-theme[selected_bg]="#212121"
-
-# Foreground color of selected item in processes box
-theme[selected_fg]="#3264eb"
-
-# Color of inactive/disabled text
-theme[inactive_fg]="#757575"
-
-# Color of text appearing on top of graphs, i.e uptime and current network graph scaling
-theme[graph_text]="#424242"
-
-# Background color of the percentage meters
-theme[meter_bg]="#212121"
-
-# Misc colors for processes box including mini cpu graphs, details memory graph and details status text
-theme[proc_misc]="#424242"
-
-# CPU, Memory, Network, Proc box outline colors
-theme[cpu_box]="#8a4ad7"
-theme[mem_box]="#026fde"
-theme[net_box]="#c900c4"
-theme[proc_box]="#3264eb"
-
-# Box divider line and small boxes line color
-theme[div_line]="#757575"
-
-# Temperature graph color (Green -> Yellow -> Red)
-theme[temp_start]="#026fde"
-theme[temp_mid]="#026fde"
-theme[temp_end]="#c900c4"
-
-# CPU graph colors (Teal -> Blue -> Purple)
-theme[cpu_start]="#0c67de"
-theme[cpu_mid]="#3264eb"
-theme[cpu_end]="#8a4ad7"
-
-# Mem/Disk free meter
-theme[free_start]="#8a4ad7"
-theme[free_mid]="#3264eb"
-theme[free_end]="#0c67de"
-
-# Mem/Disk cached meter
-theme[cached_start]="#3264eb"
-theme[cached_mid]="#0c67de"
-theme[cached_end]="#8a4ad7"
-
-# Mem/Disk available meter
-theme[available_start]="#026fde"
-theme[available_mid]="#c900c4"
-theme[available_end]="#c900c4"
-
-# Mem/Disk used meter (Green -> Teal -> Blue)
-theme[used_start]="#026fde"
-theme[used_mid]="#0c67de"
-theme[used_end]="#3264eb"
-
-# Download graph colors
-theme[download_start]="#026fde"
-theme[download_mid]="#c900c4"
-theme[download_end]="#c900c4"
-
-# Upload graph colors (Green -> Teal -> Blue)
-theme[upload_start]="#026fde"
-theme[upload_mid]="#0c67de"
-theme[upload_end]="#3264eb"
-
-# Process box color gradient for threads, mem and cpu usage
-theme[process_start]="#0c67de"
-theme[process_mid]="#3264eb"
-theme[process_end]="#8a4ad7"
-
-# Graph gradient colors (spectrum shades from background to foreground)
-theme[gradient_color_0]="#fafafa"
-theme[gradient_color_1]="#fbfbfb"
-theme[gradient_color_2]="#212121"
-theme[gradient_color_3]="#757575"
-theme[gradient_color_4]="#191919"
-theme[gradient_color_5]="#212121"
-theme[gradient_color_6]="#424242"
-theme[gradient_color_7]="#595959"

themes/lupine/chromium.theme

@@ -1 +0,0 @@
-250,250,250

themes/lupine/colors.toml

@@ -1,31 +1,28 @@
-# UI Colors (extended)
+mode = "light"
+
 accent = "#3264eb"
-cursor = "#212121"
 
-# Primary colors
+bg = "#fafafa"
-foreground = "#212121"
+dark_bg = "#ececec"
-background = "#fafafa"
+darker_bg = "#dedede"
+lighter_bg = "#f5f5f5"
+selection = "#d0d0d0"
+muted = "#9e9e9e"
+dark_fg = "#757575"
+fg = "#212121"
+light_fg = "#424242"
+bright_fg = "#000000"
 
-# Selection colors
+red = "#c900c4"
-selection_foreground = "#fafafa"
+yellow = "#026fde"
-selection_background = "#212121"
+green = "#026fde"
+cyan = "#0c67de"
+blue = "#3264eb"
+magenta = "#8a4ad7"
 
-# Normal colors (ANSI 0-7)
+bright_red = "#f930fb"
-color0 = "#fafafa"
+bright_yellow = "#358fff"
-color1 = "#c900c4"
+bright_green = "#358fff"
-color2 = "#026fde"
+bright_cyan = "#3986ff"
-color3 = "#026fde"
+bright_blue = "#5482ff"
-color4 = "#3264eb"
+bright_magenta = "#b363ff"
-color5 = "#8a4ad7"
-color6 = "#0c67de"
-color7 = "#212121"
-
-# Bright colors (ANSI 8-15)
-color8 = "#757575"
-color9 = "#f930fb"
-color10 = "#358fff"
-color11 = "#358fff"
-color12 = "#5482ff"
-color13 = "#b363ff"
-color14 = "#3986ff"
-color15 = "#000000"