some shellcheck and others fixes

PPpMGR.sh

 #!/bin/bash
+# shellcheck disable=SC2155
+# shellcheck disable=SC2001
+# shellcheck disable=SC2048
 PPpMGR_RANDOM="${RANDOM}"
 valid_fs=("btrfs" "ext4")
 # Проверяем, установлено ли yad
@@ -8,9 +11,9 @@ if ! command -v yad &> /dev/null; then
 fi
 
 if [[ -d "$HOME/.var/app/ru.linux_gaming.PortProton/" ]]; then 
-    PP_default_prefixes_directory="$HOME/.var/app/ru.linux_gaming.PortProton/"
+    PP_default_prefixes_directory="$HOME/.var/app/ru.linux_gaming.PortProton/prefixes"
 else 
-    PP_default_prefixes_directory="$(cat $HOME/.config/PortProton.conf)"
+    PP_default_prefixes_directory="$(cat "$HOME"/.config/PortProton.conf)/prefixes"
 fi
 
 percent_bar() {
@@ -29,12 +32,10 @@ percent_bar() {
     printf "]"
 }
 
-PP_default_prefixes_directory="$HOME/PortProton/prefixes"
-
 pfxparse() {
     target_directory="$1"
 
-    for entry in $PP_default_prefixes_directory/*
+    for entry in "$PP_default_prefixes_directory"/*
     do
         # Проверяем, является ли элемент директорией
         if [ -d "$entry" ]; then
@@ -42,9 +43,9 @@ pfxparse() {
             real_path=$(realpath "$entry")
 
             # Проверяем, содержит ли путь указанную точку
-            if [[ "$real_path" =~ "$target_directory" ]]; then
+            if [[ "$real_path" =~ $target_directory ]]; then
                 # Извлекаем имя префикса и его реальный путь
-                prefix_name=$(basename $entry)
+                prefix_name=$(basename "$entry")
                 echo "$prefix_name|$real_path"
             fi
         fi
@@ -55,11 +56,11 @@ gui() {
     old_IFS=$IFS && IFS=$'|'
     local tab_count=0
 
-    for tab in $(df -T "$HOME" /mnt/* /run/media/$USER/* | tail -n +2 | awk '{printf "%s %s %s|", $7,$2,$6}') ; do
+    for tab in $(df -T "$HOME" /mnt/* /run/media/"$USER"/* | tail -n +2 | awk '{printf "%s %s %s|", $7,$2,$6}') ; do
         IFS=$' ' read -r mnt_name mnt_fstype occupancy_percent <<< "$tab"
         local PPpMGR_BUTTONS=()
 
-        if [[ "${valid_fs[@]}" =~ "$mnt_fstype" ]]; then
+        if [[ "${valid_fs[*]}" =~ $mnt_fstype ]]; then
             echo "Found valid filesystem: $mnt_fstype"
         else
             echo "Invalid filesystem: $mnt_fstype, continuing..."
@@ -71,12 +72,12 @@ gui() {
         for pfx in $prefixes_in_mnt ; do
             ((button_count++))
             IFS=$'|' read -r pfx_name pfx_dir <<< "$pfx"
-            local PPpMGR_BUTTONS[$button_count]="--field=$pfx_name:FBTN"
+            local PPpMGR_BUTTONS[button_count]="--field=$pfx_name:FBTN"
         done
 
         echo "$prefixes_in_mnt"
-        local occupancy_percent_bar=$(percent_bar "$occupancy_percent" "25")
-        local PPpMGR_TAB[$tab_count]="--tab=   $(echo $mnt_name | sed 's/_/ /')   !drive-harddisk"      
+        local occupancy_percent_bar="$(percent_bar "$occupancy_percent" "25")"
+        local PPpMGR_TAB[tab_count]="--tab=   $(echo "$mnt_name" | sed 's/_/ /')   !drive-harddisk"      
         ((tab_count++))
         
         yad --plug="$PPpMGR_RANDOM" --tabnum=$tab_count --form \
@@ -87,14 +88,14 @@ gui() {
                 --field="Тип файловой системы: $mnt_fstype:LBL" \
                 \
                 \
-                ${PPpMGR_BUTTONS[@]} \
+                ${PPpMGR_BUTTONS[*]} \
                 \
                 2>/dev/null &
     done
 
 
         yad --key=$PPpMGR_RANDOM --class=PortProton --notebook --borders=3 --width=200 --height=400 \
-                --title "PPpMGR" --tab-pos=left ${PPpMGR_TAB[@]} 2>/dev/null
+                --title "PPpMGR" --tab-pos=left ${PPpMGR_TAB[*]} 2>/dev/null
 
         YAD_STATUS="$?"
         IFS=${old_IFS}