Redesign Display Settings, Wallpapers, Booru; add System Monitor, Weather

Display Settings: drag-to-arrange multi-monitor canvas with edge
snapping (locked when only one screen is connected), 8/10-bit depth,
color management presets (sRGB/Wide/EDID/HDR+EDID), SDR
brightness/saturation, ICC profile path, VRR toggle. display-set now
takes a single pre-built descriptor instead of a fixed positional arg
list, since Hyprland's monitor keyword grew well past that.

Wallpapers: fixed the current-wallpaper highlight never loading on
open, added real first-frame thumbnails for animated wallpapers
(wallpaper-thumbs + ffmpeg), bigger 2-column grid, filename filter.

Booru: separate downloads folder from Wallpapers so browsing doesn't
clutter the wallpaper picker, bigger grid, Safe/Moderate/Explicit
rating tiers replacing the old binary toggle, sort order (Newest/
Score/Random). Fixed pagination being completely broken (a Flow
anchor violation was silently disabling the whole layout) and
Danbooru's Random sort (order:random tag times out server-side --
switched to their random=true endpoint for that case).

Wi-Fi panel: added a "Scanning.../No networks found" state and a
manual rescan button -- previously showed nothing either way, making
"still scanning" indistinguishable from a real failure.

Bluetooth: auto-scans on open like Wi-Fi now, instead of requiring a
manual click every time.

New: System Monitor panel (CPU/RAM/GPU/VRAM/disk usage, NVIDIA or AMD
detected automatically) and Weather panel (IP-geolocated or a typed
city, current + hourly forecast, Open-Meteo, no API key) with a
compact taskbar badge.

modules/scripts/display-set.sh

@@ -1,23 +1,27 @@
 #!/usr/bin/env bash
-# Applies a monitor mode/position/scale/transform immediately (hyprctl)
-# AND persists it into ~/.config/hypr/display.conf, which hyprland.conf
-# sources — without that file, hyprland.conf's generic fallback rule
+# Applies a full monitor descriptor immediately (hyprctl) AND persists it
+# into ~/.config/hypr/display.conf, which hyprland.conf sources — without
+# that file, hyprland.conf's generic fallback rule
 # ("monitor = , preferred, auto, 1") is the only thing on record, and
 # ANYTHING that makes Hyprland re-evaluate monitor state (observed: even
 # changing the cursor theme via `hyprctl setcursor` does this) reapplies
 # that fallback, silently dropping back to "preferred" refresh rate
 # instead of whatever the user actually picked.
+#
+# Takes the monitor name and everything after it as one pre-built
+# descriptor string (mode,position,scale + optional transform/bitdepth/
+# cm/sdrbrightness/sdrsaturation/vrr/icc keyword,value pairs) rather than
+# fixed positional args — Hyprland's own `monitor` keyword syntax grew
+# past "mode/x/y/scale/transform" (color management, HDR, VRR, ICC), and
+# the caller (LeftFlyout.qml's Displays panel) already has all of that as
+# structured state, so it's simpler for it to build the one string than
+# for this script to accept a growing positional argument list.
 set -euo pipefail
 
-mon="${1:?usage: display-set <monitor> <mode> <x> <y> <scale> [transform]}"
-mode="${2:?mode required}"
-x="${3:?x required}"
-y="${4:?y required}"
-scale="${5:?scale required}"
-transform="${6:-0}"
+mon="${1:?usage: display-set <monitor> <descriptor-tail>}"
+descriptor_tail="${2:?descriptor required}"
 
-descriptor="$mon,$mode,${x}x${y},$scale"
-[ "$transform" != "0" ] && descriptor="$descriptor,transform,$transform"
+descriptor="$mon,$descriptor_tail"
 
 conf="$HOME/.config/hypr/display.conf"
 mkdir -p "$(dirname "$conf")"