refactor: Linting fixes

commands/con.sh

@@ -1,3 +1,4 @@
+# shellcheck shell=bash
 # Command: con
 # Edits configurations in ~/.config/
 

commands/help.sh

@@ -1,3 +1,4 @@
+# shellcheck shell=bash
 # Command: help
 # Lists all available bootstrap commands and installers
 

commands/uninstall.sh

@@ -1,3 +1,4 @@
+# shellcheck shell=bash
 # Command: uninstall (gone)
 # Removes bootstrap CLI and cleans up shell configuration files
 
@@ -45,7 +46,6 @@ if [ -f "$HOME/.bash_aliases" ]; then
     
     # 2. Remove specific aliases added by bootstrap (e.g. vim -> nvim)
     if grep -q '^alias vim="nvim"$' "$HOME/.bash_aliases" 2>/dev/null; then
-        local tmp_file
         tmp_file=$(mktemp)
         sed '/^alias vim="nvim"$/d' "$HOME/.bash_aliases" > "$tmp_file"
         cat "$tmp_file" > "$HOME/.bash_aliases"
@@ -61,7 +61,6 @@ fi
 
 # If force is false, leave a lightweight 'b back' shortcut function in shell config files
 if [ "$FORCE" = "false" ]; then
-    local b_back_content
     b_back_content=$(cat << 'EOF'
 b() {
     if [ "${1:-}" = "back" ]; then

commands/up.sh

@@ -1,9 +1,11 @@
+# shellcheck shell=bash
 # Command: up
 # Manually checks for updates and runs the updater if a newer version is found.
 
 # Source libraries if needed
 if [ -z "${_LIB_COMMON_SOURCED:-}" ]; then
     _LIB_DIR="${BOOTSTRAP_DIR:-$HOME/.config/bootstrap}/lib"
+    # shellcheck source=/dev/null
     . "$_LIB_DIR/common.sh"
 fi
 
@@ -14,7 +16,7 @@ log_info "Checking for updates..."
 local_ver="0.0.0"
 version_file="${BOOTSTRAP_DIR:-$HOME/.config/bootstrap}/VERSION"
 if [ -f "$version_file" ]; then
-    local_ver=$(cat "$version_file" | tr -d '[:space:]')
+    local_ver=$(tr -d '[:space:]' < "$version_file")
 fi
 
 base_url="https://git.adityagupta.dev/sortedcord/bootstrap/raw/branch/master"