Fix wallpaper persistence, tray icons, Booru bugs, session launcher

- Persist last-set wallpaper and restore it via exec-once, since
  hyprpaper/mpvpaper start every session with nothing loaded
- Fix Vesktop's system tray icon rendering as a broken texture: only
  resolve tray icons through the icon theme when they're actual names,
  not raw pixmap-sourced image:// URLs
- Launch Hyprland via start-hyprland (its official watchdog launcher)
  instead of the raw binary, removing the startup warning and adding
  hang recovery
- Fix Booru panel: Lewds toggle now actually persists, tag autocomplete
  no longer drops/races overlapping requests, and pagination wraps
  instead of overflowing off-screen
- Remove the redundant gap between windows and sidebars/tiles
  (gaps_in/gaps_out, and duplicate flyout margins stacked on top of
  Hyprland's automatic exclusive-zone inset)

modules/scripts/wallpaper-restore.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+# Reapplies the last-set wallpaper on login/reboot. hyprpaper and mpvpaper
+# both start every session with nothing loaded, and wallpaper-set only ever
+# ran through live IPC with no persistence of its own — without this the
+# desktop silently reverted to blank on every fresh login. Run via
+# exec-once in hyprland.conf, after hyprpaper.
+set -euo pipefail
+
+state_file="$HOME/.config/hypr/wallpaper.conf"
+[ -f "$state_file" ] || exit 0
+
+# hyprpaper's IPC socket isn't guaranteed ready the instant exec-once fires
+# it, since exec-once entries all start back-to-back with no ordering
+# guarantee beyond process spawn order.
+for _ in $(seq 1 50); do
+    hyprctl hyprpaper listactive > /dev/null 2>&1 && break
+    sleep 0.1
+done
+
+bash "$state_file"

modules/scripts/wallpaper-set.sh

@@ -58,3 +58,12 @@ case "${image,,}" in
         hyprctl hyprpaper wallpaper ",$image,$fit_mode" > /dev/null
         ;;
 esac
+
+# Persist so the wallpaper survives a reboot/relogin. hyprpaper/mpvpaper
+# both start every session with nothing loaded — this was previously only
+# ever set at runtime via IPC, so the desktop silently reverted to blank
+# every fresh login. wallpaper-restore (exec-once in hyprland.conf, after
+# hyprpaper starts) re-runs the exact command saved here.
+state_file="$HOME/.config/hypr/wallpaper.conf"
+mkdir -p "$(dirname "$state_file")"
+printf 'wallpaper-set %q %q %q %q %q\n' "$image" "$fit_mode" "$muted" "$speed" "$auto_pause" > "$state_file"