fix(install): bring install.sh up to Node 22 and document both Linux scripts (#165)

install.sh still installed Node 20 (dropped in #152), ran the Debian-only
NodeSource script on yum systems, and hard-coded /usr/bin/node. The
README only mentioned install.sh, not setup.sh.

install.sh now:
- installs Node 22 LTS from the right NodeSource repo per distro and
  checks the same 22.12+/24+ floor as setup.sh
- delegates npm install, mirror detection, native-binary checks and the
  build to setup.sh, so the two scripts share one install path
- stops the service and replaces dist/node_modules on re-install (data/
  is kept), copies bin/ (yt-dlp), and uses the real node path in the unit

README explains the difference between the two scripts and when to use
which. setup.sh's "Node.js not found" message no longer says 20+.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

scripts/install.sh

@@ -1,6 +1,16 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
+#
+# TSMusicBot Installer (Linux, systemd)
+# - Installs system packages and Node.js 22 LTS
+# - Runs scripts/setup.sh to install dependencies, verify native binaries and build
+# - Copies the build to /opt/tsmusicbot and registers a systemd service (auto-start on boot)
+#
+# Only want to build and run it yourself (no Node install, no service)?
+# Use scripts/setup.sh instead — see README「Linux 安装脚本」.
+#
+
 echo "╔══════════════════════════════════════╗"
 echo "║       TSMusicBot Installer           ║"
 echo "╚══════════════════════════════════════╝"
@@ -11,6 +21,9 @@ SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
 INSTALL_DIR="/opt/tsmusicbot"
 SERVICE_NAME="tsmusicbot"
+# Node LTS line to install when a supported Node is missing. Keep in sync with
+# package.json "engines" and the floor check in setup.sh (#152).
+NODE_LTS_MAJOR=22
 
 # Verify we're in a valid project directory
 if [ ! -f "$PROJECT_DIR/package.json" ]; then
@@ -28,42 +41,66 @@ else
     exit 1
 fi
 
-echo "[1/6] Installing system dependencies..."
+# Supported: 22.12+ or 24+ (odd majors are excluded by better-sqlite3 and vitest).
+node_supported() {
+    command -v node &> /dev/null &&
+        node -e 'const v=process.versions.node.split(".").map(Number); process.exit((v[0]===22&&v[1]>=12)||v[0]>=24?0:1)'
+}
+
+echo "[1/5] Installing system dependencies..."
 case $OS in
     ubuntu|debian)
         sudo apt-get update -qq
-        sudo apt-get install -y -qq curl build-essential python3
+        sudo apt-get install -y -qq curl ca-certificates build-essential python3 ffmpeg
         ;;
-    centos|rhel|fedora)
+    centos|rhel|fedora|rocky|almalinux)
         sudo yum install -y curl gcc gcc-c++ make python3
         ;;
     arch|manjaro)
-        sudo pacman -S --noconfirm curl base-devel python
+        sudo pacman -S --noconfirm --needed curl base-devel python ffmpeg
         ;;
     *)
-        echo "Unsupported OS: $OS. Please install Node.js 20, build tools, and FFmpeg manually."
+        echo "Unsupported OS: $OS. Please install Node.js ${NODE_LTS_MAJOR}.12+ and build tools manually."
         ;;
 esac
 
-echo "[2/6] Installing Node.js 20 LTS..."
-if ! command -v node &> /dev/null || [[ $(node -v | cut -d. -f1 | tr -d 'v') -lt 20 ]]; then
-    curl -fsSL https://deb.nodesource.com/setup_20.x | sudo -E bash -
-    sudo apt-get install -y -qq nodejs 2>/dev/null || sudo yum install -y nodejs 2>/dev/null
-fi
-echo "Node.js $(node -v) installed"
-
-echo "[3/6] Installing dependencies..."
-cd "$PROJECT_DIR"
-npm install
-if [ -d "$PROJECT_DIR/web/package.json" ] || [ -f "$PROJECT_DIR/web/package.json" ]; then
-    (cd "$PROJECT_DIR/web" && npm install)
+echo "[2/5] Installing Node.js ${NODE_LTS_MAJOR} LTS..."
+if node_supported; then
+    echo "Node.js $(node -v) already installed"
+else
+    case $OS in
+        ubuntu|debian)
+            curl -fsSL "https://deb.nodesource.com/setup_${NODE_LTS_MAJOR}.x" | sudo -E bash -
+            sudo apt-get install -y -qq nodejs
+            ;;
+        centos|rhel|fedora|rocky|almalinux)
+            curl -fsSL "https://rpm.nodesource.com/setup_${NODE_LTS_MAJOR}.x" | sudo bash -
+            sudo yum install -y nodejs
+            ;;
+        arch|manjaro)
+            sudo pacman -S --noconfirm --needed nodejs npm
+            ;;
+    esac
+    if ! node_supported; then
+        echo "Error: Node.js 22.12+ (or 24+) is required, found: $(node -v 2>/dev/null || echo none)."
+        echo "Install it from https://nodejs.org/ (or https://nodejs.cn/) and re-run this script."
+        exit 1
+    fi
+    echo "Node.js $(node -v) installed"
 fi
 
-echo "[4/6] Building project..."
-npm run build
+echo "[3/5] Installing dependencies and building (scripts/setup.sh)..."
+bash "$SCRIPT_DIR/setup.sh"
 
-echo "[5/6] Copying to $INSTALL_DIR..."
+echo "[4/5] Copying to $INSTALL_DIR..."
+# Stop a running copy before replacing its files (re-install / upgrade).
+if systemctl is-active --quiet "$SERVICE_NAME" 2>/dev/null; then
+    sudo systemctl stop "$SERVICE_NAME"
+fi
 sudo mkdir -p "$INSTALL_DIR"
+# Replace build output wholesale so files removed upstream don't linger.
+# data/ (config, database, cookies) is never touched.
+sudo rm -rf "$INSTALL_DIR/dist" "$INSTALL_DIR/node_modules" "$INSTALL_DIR/web/dist"
 sudo cp -r "$PROJECT_DIR/dist" "$INSTALL_DIR/"
 sudo cp -r "$PROJECT_DIR/node_modules" "$INSTALL_DIR/"
 sudo cp "$PROJECT_DIR/package.json" "$INSTALL_DIR/"
@@ -72,13 +109,18 @@ if [ -d "$PROJECT_DIR/web/dist" ]; then
     sudo mkdir -p "$INSTALL_DIR/web"
     sudo cp -r "$PROJECT_DIR/web/dist" "$INSTALL_DIR/web/"
 fi
+# yt-dlp is looked up in bin/ next to dist/ before falling back to PATH
+if [ -d "$PROJECT_DIR/bin" ]; then
+    sudo cp -r "$PROJECT_DIR/bin" "$INSTALL_DIR/"
+fi
 # Copy scripts for future use
 sudo mkdir -p "$INSTALL_DIR/scripts"
 sudo cp -r "$PROJECT_DIR/scripts/"* "$INSTALL_DIR/scripts/" 2>/dev/null || true
 # Create data directory
 sudo mkdir -p "$INSTALL_DIR/data"
 
-echo "[6/6] Creating systemd service..."
+echo "[5/5] Creating systemd service..."
+NODE_BIN="$(command -v node)"
 sudo tee /etc/systemd/system/${SERVICE_NAME}.service > /dev/null <<EOL
 [Unit]
 Description=TSMusicBot - TeamSpeak Music Bot
@@ -88,7 +130,7 @@ After=network.target
 Type=simple
 User=root
 WorkingDirectory=${INSTALL_DIR}
-ExecStart=/usr/bin/node ${INSTALL_DIR}/dist/index.js
+ExecStart=${NODE_BIN} ${INSTALL_DIR}/dist/index.js
 Restart=on-failure
 RestartSec=5
 Environment=NODE_ENV=production
@@ -99,15 +141,15 @@ EOL
 
 sudo systemctl daemon-reload
 sudo systemctl enable ${SERVICE_NAME}
-sudo systemctl start ${SERVICE_NAME}
+sudo systemctl restart ${SERVICE_NAME}
 
 echo ""
 echo "╔══════════════════════════════════════╗"
 echo "║    TSMusicBot installed and running! ║"
 echo "║                                      ║"
-echo "║    WebUI: http://localhost:3000       ║"
+echo "║    WebUI: http://localhost:3000      ║"
 echo "║                                      ║"
-echo "║    Commands:                          ║"
+echo "║    Commands:                         ║"
 echo "║    systemctl status tsmusicbot       ║"
 echo "║    systemctl restart tsmusicbot      ║"
 echo "║    systemctl stop tsmusicbot         ║"

scripts/setup.sh

@@ -21,7 +21,7 @@ echo ""
 
 # ---- Check Node.js ----
 if ! command -v node &>/dev/null; then
-    echo "[ERROR] Node.js not found. Please install Node.js 20+ from https://nodejs.org"
+    echo "[ERROR] Node.js not found. Please install Node.js 22.12+ LTS from https://nodejs.org"
     echo "        or https://nodejs.cn/ (China mirror)."
     exit 1
 fi