大更新：

1、完善SQL语法
2、移除node前端，只保留静态资源
3、写好安装脚本
4、做好linux适配

scripts/csql-web.sh

@@ -0,0 +1,62 @@
+#!/bin/sh
+# csql-web：只负责启动 Web 前端（先拉起存储进程，再起 Web 服务）。
+# 配置走 chusql.toml，两层各读各的分区；这里只取 [web] 的 host/port 拼地址。
+set -eu
+
+home_dir=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
+bin="$home_dir/bin"
+
+# 和在 Windows 的 csql-web.ps1（Start-Process -WorkingDirectory）保持一致：
+# 先切到安装目录，配置里写相对的 static_dir / data_dir 才有确定的解析基准。
+cd "$home_dir"
+
+config_dir="${XDG_CONFIG_HOME:-$HOME/.config}/ChuSQL"
+config="$config_dir/chusql.toml"
+[ -f "$config" ] || { echo "!! config not found: $config" >&2; exit 1; }
+
+web_setting() {
+    awk -v key="$1" -v def="$2" '
+        /^[[:space:]]*\[/ { section = $0; gsub(/[][[:space:]]/, "", section); next }
+        section != "web" { next }
+        {
+            line = $0
+            sub(/#.*/, "", line)
+            if (line ~ "^[[:space:]]*" key "[[:space:]]*=") {
+                sub(/^[^=]*=[[:space:]]*/, "", line)
+                gsub(/^[[:space:]]+|[[:space:]]+$/, "", line)
+                gsub(/^"|"$/, "", line)
+                print line
+                found = 1
+                exit
+            }
+        }
+        END { if (!found) print def }
+    ' "$config"
+}
+
+storage_exe="$bin/chusql-storage"
+web_exe="$bin/chusql-web"
+[ -x "$storage_exe" ] || { echo "!! storage binary not found in $bin" >&2; exit 1; }
+[ -x "$web_exe" ] || { echo "!! web binary not found in $bin" >&2; exit 1; }
+
+host=$(web_setting host 127.0.0.1)
+port=$(web_setting port 7777)
+log_dir="$home_dir/logs"
+mkdir -p "$log_dir"
+
+"$storage_exe" >>"$log_dir/storage.log" 2>>"$log_dir/storage.err.log" &
+storage_pid=$!
+"$web_exe" >>"$log_dir/web.log" 2>>"$log_dir/web.err.log" &
+web_pid=$!
+
+cleanup() {
+    kill "$web_pid" "$storage_pid" 2>/dev/null || true
+    wait "$web_pid" "$storage_pid" 2>/dev/null || true
+    echo stopped.
+}
+trap cleanup INT TERM EXIT
+
+echo "starting web ..."
+echo "ready: http://$host:$port/"
+echo "logs:  $log_dir"
+wait "$web_pid"