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/matte-black/btop.theme

@@ -1,92 +1,25 @@
-# ────────────────────────────────────────────────────────────
-# Bashtop theme - Nomarchy Matte Black
-# by tahayvr
-# https://github.com/tahayvr
-# ────────────────────────────────────────────────────────────
-
-# Colors should be in 6 or 2 character hexadecimal or single spaced rgb decimal: "#RRGGBB", "#BW" or "0-255 0-255 0-255"
-# example for white: "#ffffff", "#ff" or "255 255 255".
-
-# All graphs and meters can be gradients
-# For single color graphs leave "mid" and "end" variable empty.
-# Use "start" and "end" variables for two color gradient
-# Use "start", "mid" and "end" for three color gradient
-
-# Main background, empty for terminal default, need to be empty if you want transparent background
-theme[main_bg]=""
-
-# Main text color
-theme[main_fg]="#EAEAEA"
-
-# Title color for boxes
-theme[title]="#8a8a8d"
-
-# Highlight color for keyboard shortcuts
-theme[hi_fg]="#f59e0b"
-
-# Background color of selected item in processes box
-theme[selected_bg]="#f59e0b"
-
-# Foreground color of selected item in processes box
-theme[selected_fg]="#EAEAEA"
-
-# Color of inactive/disabled text
-theme[inactive_fg]="#333333"
-
-# Misc colors for processes box including mini cpu graphs, details memory graph and details status text
-theme[proc_misc]="#8a8a8d"
-
-# Cpu box outline color
-theme[cpu_box]="#8a8a8d"
-
-# Memory/disks box outline color
-theme[mem_box]="#8a8a8d"
-
-# Net up/down box outline color
-theme[net_box]="#8a8a8d"
-
-# Processes box outline color
-theme[proc_box]="#8a8a8d"
-
-# Box divider line and small boxes line color
+theme[main_bg]="#121212"
+theme[main_fg]="#bebebe"
+theme[title]="#bebebe"
+theme[hi_fg]="#e68e0d"
+theme[selected_bg]="#8a8a8d"
+theme[selected_fg]="#bebebe"
+theme[inactive_fg]="#8a8a8d"
+theme[graph_text]="#9a9a9d"
+theme[meter_bg]="#333333"
+theme[proc_misc]="#D35F5F"
+theme[cpu_box]="#e68e0d"
+theme[mem_box]="#FFC107"
+theme[net_box]="#D35F5F"
+theme[proc_box]="#333333"
 theme[div_line]="#8a8a8d"
-
-# Temperature graph colors
-theme[temp_start]="#8a8a8d"
-theme[temp_mid]="#f59e0b"
-theme[temp_end]="#b91c1c"
-
-# CPU graph colors
-theme[cpu_start]="#8a8a8d"
-theme[cpu_mid]="#f59e0b"
-theme[cpu_end]="#b91c1c"
-
-# Mem/Disk free meter
-theme[free_start]="#8a8a8d"
-theme[free_mid]="#f59e0b"
-theme[free_end]="#b91c1c"
-
-# Mem/Disk cached meter
-theme[cached_start]="#8a8a8d"
-theme[cached_mid]="#f59e0b"
-theme[cached_end]="#b91c1c"
-
-# Mem/Disk available meter
-theme[available_start]="#8a8a8d"
-theme[available_mid]="#f59e0b"
-theme[available_end]="#b91c1c"
-
-# Mem/Disk used meter
-theme[used_start]="#8a8a8d"
-theme[used_mid]="#f59e0b"
-theme[used_end]="#b91c1c"
-
-# Download graph colors
-theme[download_start]="#8a8a8d"
-theme[download_mid]="#f59e0b"
-theme[download_end]="#b91c1c"
-
-# Upload graph colors
-theme[upload_start]="#8a8a8d"
-theme[upload_mid]="#f59e0b"
-theme[upload_end]="#b91c1c"
+theme[temp_start]="#FFC107"
+theme[temp_mid]="#b91c1c"
+theme[temp_end]="#D35F5F"
+theme[cpu_start]="#FFC107"
+theme[cpu_mid]="#b91c1c"
+theme[cpu_end]="#D35F5F"
+theme[free_start]="#FFC107"
+theme[used_start]="#b91c1c"
+theme[download_start]="#e68e0d"
+theme[upload_start]="#D35F5F"