Add modular install and uninstall scripts

uninstall-nvm.sh

@@ -0,0 +1,78 @@
+#!/bin/bash
+set -euo pipefail
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+BOLD='\033[1m'
+NC='\033[0m'
+
+info() {
+    echo -e "${GREEN}[INFO]${NC} $1"
+}
+
+warn() {
+    echo -e "${YELLOW}[WARN]${NC} $1"
+}
+
+success() {
+    echo -e "${BLUE}[DONE]${NC} $1"
+}
+
+section() {
+    echo
+    echo -e "${BOLD}${BLUE}== $1 ==${NC}"
+}
+
+remove_block() {
+    local file="$1"
+    local begin="$2"
+    local end="$3"
+    local tmp_file=""
+
+    [[ -f "$file" ]] || return 0
+
+    tmp_file="$(mktemp)"
+    awk -v begin="$begin" -v end="$end" '
+        index($0, begin) { skip=1; next }
+        index($0, end)   { skip=0; next }
+        !skip            { print }
+    ' "$file" > "$tmp_file"
+    mv "$tmp_file" "$file"
+}
+
+remove_line() {
+    local file="$1"
+    local line="$2"
+    local tmp_file=""
+
+    [[ -f "$file" ]] || return 0
+
+    tmp_file="$(mktemp)"
+    awk -v line="$line" '$0 != line { print }' "$file" > "$tmp_file"
+    mv "$tmp_file" "$file"
+}
+
+main() {
+    section "NVM 卸载脚本"
+
+    if [[ -d "$HOME/.nvm" ]]; then
+        info "删除 $HOME/.nvm ..."
+        rm -rf "$HOME/.nvm"
+    else
+        warn "目录不存在: $HOME/.nvm"
+    fi
+
+    remove_block "$HOME/.bashrc" "# >>> nvm initialize >>>" "# <<< nvm initialize <<<"
+    remove_block "$HOME/.zshrc" "# >>> nvm initialize >>>" "# <<< nvm initialize <<<"
+    remove_line "$HOME/.profile" 'export NVM_DIR="$HOME/.nvm"'
+
+    if command -v npm >/dev/null 2>&1; then
+        npm config delete registry >/dev/null 2>&1 || true
+    fi
+
+    success "NVM 卸载流程结束。"
+}
+
+main "$@"