feat(merge): 以官方 main 为基底融合 PR#530 多维表格与本地定制

- 多维表格（canvas-batch-table-node/use-canvas-batch-table/canvas-batch-table 等）以 PR#530 实现为主
- 保留官方 main 全部新功能：banner/画布版本历史/提示词编辑/方舟 Agent Plan/支付导出
- 移植本地定制：ddcat 多参考图校验、万有引力 lxmone 连接错误提示、Description v20(v24)、自建插件(a6api/metaso-h3/antigravity-proxy/lxmone)、seccomp、Windows 脚本
- 迁移版本升至 v24（官方 v20-23 banner/版本历史 + 我们的 Description 列）
- 修复官方缺失的 markdownPlainText import

scripts/start-canvas.ps1

@@ -0,0 +1,56 @@
+[CmdletBinding()]
+param()
+
+$ErrorActionPreference = "Stop"
+
+$repoRoot = (Resolve-Path (Join-Path $PSScriptRoot "..")).Path
+$localStarter = Join-Path $PSScriptRoot "start-local.ps1"
+$healthUrl = "http://127.0.0.1:3000/api/health"
+$canvasUrl = "http://localhost:3000/canvas"
+
+function Test-CanvasHttp([string]$Url) {
+    try {
+        $response = Invoke-WebRequest -Uri $Url -UseBasicParsing -TimeoutSec 3
+        return $response.StatusCode -ge 200 -and $response.StatusCode -lt 400
+    } catch {
+        return $false
+    }
+}
+
+function Test-ListeningPort([int]$Port) {
+    try {
+        return $null -ne (Get-NetTCPConnection -LocalPort $Port -State Listen -ErrorAction Stop | Select-Object -First 1)
+    } catch {
+        return $false
+    }
+}
+
+if (Test-CanvasHttp $healthUrl) {
+    Write-Host "影策画布已经在运行，正在打开..." -ForegroundColor Green
+    Start-Process $canvasUrl
+    exit 0
+}
+
+$occupiedPorts = @(3000, 8080) | Where-Object { Test-ListeningPort $_ }
+if ($occupiedPorts.Count -gt 0) {
+    throw "端口 $($occupiedPorts -join ', ') 已被其他程序占用，无法安全启动影策。"
+}
+
+if (-not (Test-Path -LiteralPath $localStarter)) {
+    throw "未找到项目启动脚本：$localStarter"
+}
+
+Write-Host "正在启动影策前端和后端，请稍候..." -ForegroundColor Cyan
+& $localStarter
+
+$deadline = (Get-Date).AddMinutes(3)
+do {
+    Start-Sleep -Seconds 2
+    if (Test-CanvasHttp $healthUrl) {
+        Write-Host "影策画布已启动，正在打开浏览器..." -ForegroundColor Green
+        Start-Process $canvasUrl
+        exit 0
+    }
+} while ((Get-Date) -lt $deadline)
+
+throw "影策服务已拉起，但 3 分钟内未通过健康检查。请查看打开的前端、后端窗口。"