feat: live charge limit, identity retunes, btop assets (product calls)

- Charge limit: udev GROUP=users on threshold; menu applies sysfs live
  and persists state; boot/AC oneshot prefers live theme-state.json.
- Look & Feel: Reset wallpaper (auto); Theme/next/night light already there.
- NVIDIA first-class wrappers deferred past v1 (keep #59 comments).
- Identity taste: white, lumon, hackerman, matte-black, miasma.
- Hand btop.theme for identity + boreal/executive-slate/neon-glass.

Verified: V0 contrast; V1 battery-charge-limit VM. V3 live sysfs on laptop.

themes/white/btop.theme

@@ -1,70 +1,25 @@
-# Main background, empty for terminal default, need to be empty if you want transparent background
 theme[main_bg]="#ffffff"
-
-# Main text color
 theme[main_fg]="#000000"
-
-# Title color for boxes
-theme[title]="#2e2e2e"
-
-# Highlight color for keyboard shortcuts
-theme[hi_fg]="#3e3e3e"
-
-# Background color of selected item in processes box
+theme[title]="#000000"
+theme[hi_fg]="#6e6e6e"
 theme[selected_bg]="#c0c0c0"
-
-# Foreground color of selected item in processes box
 theme[selected_fg]="#000000"
-
-# Color of inactive/disabled text
-theme[inactive_fg]="#c0c0c0"
-
-# Misc colors for processes box including mini cpu graphs, details memory graph and details status text
+theme[inactive_fg]="#b5b5b5"
+theme[graph_text]="#404040"
+theme[meter_bg]="#f0f0f0"
 theme[proc_misc]="#2e2e2e"
-
-# Box outline and divider line color
-theme[cpu_box]="#3a3a3a"
-theme[mem_box]="#3a3a3a"
-theme[net_box]="#3a3a3a"
-theme[proc_box]="#3a3a3a"
+theme[cpu_box]="#6e6e6e"
+theme[mem_box]="#555555"
+theme[net_box]="#2e2e2e"
+theme[proc_box]="#f0f0f0"
 theme[div_line]="#c0c0c0"
-
-# Gradient for all meters and graphs
-theme[temp_start]="#3e3e3e"
-theme[temp_mid]="#1a1a1a"
-theme[temp_end]="#3a3a3a"
-
-
-theme[cpu_start]="#3e3e3e"
-theme[cpu_mid]="#1a1a1a"
-theme[cpu_end]="#3a3a3a"
-
-
-theme[free_start]="#1a1a1a"
-theme[free_mid]="#4a4a4a"
-theme[free_end]="#4a4a4a"
-
-
-theme[cached_start]="#4a4a4a"
-theme[cached_mid]="#4a4a4a"
-theme[cached_end]="#4a4a4a"
-
-
-theme[available_start]="#3e3e3e"
-theme[available_mid]="#3e3e3e"
-theme[available_end]="#3e3e3e"
-
-
-theme[used_start]="#3a3a3a"
-theme[used_mid]="#3a3a3a"
-theme[used_end]="#3a3a3a"
-
-
-theme[download_start]="#4a4a4a"
-theme[download_mid]="#3e3e3e"
-theme[download_end]="#1a1a1a"
-
-
-theme[upload_start]="#4a4a4a"
-theme[upload_mid]="#3e3e3e"
-theme[upload_end]="#1a1a1a"
+theme[temp_start]="#555555"
+theme[temp_mid]="#777777"
+theme[temp_end]="#222222"
+theme[cpu_start]="#555555"
+theme[cpu_mid]="#777777"
+theme[cpu_end]="#222222"
+theme[free_start]="#555555"
+theme[used_start]="#777777"
+theme[download_start]="#6e6e6e"
+theme[upload_start]="#2e2e2e"