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/lumon/btop.theme

@@ -1,64 +1,25 @@
-# Main background, empty for terminal default, need to be empty if you want transparent background
-theme[main_bg]=""
-theme_background=false
-
-# Main text color
-theme[main_fg]="#c7d2de"
-
-# Title color for boxes
-theme[title]="#9fcfe9"
-
-# Highlight color for keyboard shortcuts
-theme[hi_fg]="#b5deef"
-
-# Background color of selected item in processes box
-theme[selected_bg]="#355066"
-
-# Foreground color of selected item in processes box
-theme[selected_fg]="#c7d2de"
-
-# Color of inactive/disabled text
-theme[inactive_fg]="#355066"
-
-# Misc colors for processes box including mini cpu graphs, details memory graph and details status text
-theme[proc_misc]="#9fcfe9"
-
-# Box outline and divider line color
-theme[cpu_box]="#79abd2"
-theme[mem_box]="#79abd2"
-theme[net_box]="#79abd2"
-theme[proc_box]="#79abd2"
-theme[div_line]="#355066"
-
-# Gradient for all meters and graphs
-theme[temp_start]="#b5deef"
-theme[temp_mid]="#92c7e7"
-theme[temp_end]="#79abd2"
-
-theme[cpu_start]="#b5deef"
-theme[cpu_mid]="#92c7e7"
-theme[cpu_end]="#79abd2"
-
-theme[free_start]="#92c7e7"
-theme[free_mid]="#86b6da"
-theme[free_end]="#86b6da"
-
-theme[cached_start]="#86b6da"
-theme[cached_mid]="#86b6da"
-theme[cached_end]="#86b6da"
-
-theme[available_start]="#b5deef"
-theme[available_mid]="#b5deef"
-theme[available_end]="#b5deef"
-
-theme[used_start]="#79abd2"
-theme[used_mid]="#79abd2"
-theme[used_end]="#79abd2"
-
-theme[download_start]="#86b6da"
-theme[download_mid]="#b5deef"
-theme[download_end]="#92c7e7"
-
-theme[upload_start]="#86b6da"
-theme[upload_mid]="#b5deef"
-theme[upload_end]="#92c7e7"
+theme[main_bg]="#16242d"
+theme[main_fg]="#d6e2ee"
+theme[title]="#d6e2ee"
+theme[hi_fg]="#f2fcff"
+theme[selected_bg]="#304860"
+theme[selected_fg]="#d6e2ee"
+theme[inactive_fg]="#3c556e"
+theme[graph_text]="#9bb0c0"
+theme[meter_bg]="#1b2d40"
+theme[proc_misc]="#8bc9eb"
+theme[cpu_box]="#f2fcff"
+theme[mem_box]="#5e95bc"
+theme[net_box]="#8bc9eb"
+theme[proc_box]="#1b2d40"
+theme[div_line]="#304860"
+theme[temp_start]="#5e95bc"
+theme[temp_mid]="#6fa4c9"
+theme[temp_end]="#4d86b0"
+theme[cpu_start]="#5e95bc"
+theme[cpu_mid]="#6fa4c9"
+theme[cpu_end]="#4d86b0"
+theme[free_start]="#5e95bc"
+theme[used_start]="#6fa4c9"
+theme[download_start]="#f2fcff"
+theme[upload_start]="#8bc9eb"