feat(tui): 控制台列宽表（第一轮第一块）

整个 TUI 的地基：位置、对齐、边框都靠它。而它算错了**不会报错** —— 表现只是菜单右边框歪一点、光标偏一列，所以每条边界都在断言里钉住。

为什么必须自己算：.Length 是 UTF-16 code unit 的个数（汉字 1 个 char、2 列）；而 $Host.UI.RawUI.LengthInBufferCells 在 PowerShell 7 上对、在 5.1 上错（实测 中文 返回 2、字体边框字符 返回 6），且不抛错 —— 这种"一边对一边错"的 API 比两边都错更危险。

表里三个边界是实测踩过的：半角片假名 U+FF61–FF9F 是 1 列（不能划进全角区）；全角拉丁 U+FF00–FF60 是 2 列；emoji 是代理对，按一个码点算。

验收：断言 8 条（含空串与控制字符）；test.ps1 9/9 全绿（5.1 与 7）。

.scratch/_probe/TuiKit.ps1

@@ -1,4 +1,4 @@
-# ============================================================================
+# ============================================================================
 #  ZERO-DEPENDENCY PowerShell TUI PROTOTYPE  (works on 5.1 and 7.x)
 #  ASCII-only source so 5.1 (which reads non-BOM files as ANSI) parses it.
 # ============================================================================

.scratch/_probe/cells-probe.ps1

@@ -1,4 +1,4 @@
-param([Parameter(Mandatory=$true)][string]$OutFile)
+param([Parameter(Mandatory=$true)][string]$OutFile)
 $lines = New-Object System.Collections.Generic.List[string]
 function L($s) { $lines.Add($s) }
 function MK([int[]]$cp) { -join ($cp | ForEach-Object { [char]$_ }) }

.scratch/_probe/console-probe.ps1

@@ -1,4 +1,4 @@
-$out = Join-Path $env:TEMP 'console-probe.txt'
+$out = Join-Path $env:TEMP 'console-probe.txt'
 $lines = New-Object System.Collections.Generic.List[string]
 function L($s) { $lines.Add($s) }
 $src = @"

.scratch/_probe/console-probe2.ps1

@@ -1,4 +1,4 @@
-param([Parameter(Mandatory=$true)][string]$HostLabel, [Parameter(Mandatory=$true)][string]$OutFile)
+param([Parameter(Mandatory=$true)][string]$HostLabel, [Parameter(Mandatory=$true)][string]$OutFile)
 $o = New-Object System.Collections.Specialized.OrderedDictionary
 $src = @"
 using System;

.scratch/_probe/console-probe3.ps1

@@ -1,4 +1,4 @@
-param([Parameter(Mandatory=$true)][string]$HostLabel, [Parameter(Mandatory=$true)][string]$OutFile, [int]$WatchSeconds = 3)
+param([Parameter(Mandatory=$true)][string]$HostLabel, [Parameter(Mandatory=$true)][string]$OutFile, [int]$WatchSeconds = 3)
 $o = New-Object System.Collections.Specialized.OrderedDictionary
 $src = @"
 using System;

.scratch/_probe/diag-probe.ps1

@@ -1,4 +1,4 @@
-param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work)
+param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work)
 $lines = New-Object System.Collections.Generic.List[string]
 function L($s) { $lines.Add($s); [System.IO.File]::WriteAllLines($OutFile, $lines, (New-Object System.Text.UTF8Encoding($false))) }
 L ("PSVersion: " + $PSVersionTable.PSVersion + "  IsOutputRedirected=" + [Console]::IsOutputRedirected)

.scratch/_probe/final-probe.ps1

@@ -1,4 +1,4 @@
-param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work, [int]$HoldSeconds = 5)
+param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work, [int]$HoldSeconds = 5)
 $lines = New-Object System.Collections.Generic.List[string]
 function L($s) { $lines.Add($s); [System.IO.File]::WriteAllLines($OutFile, $lines, (New-Object System.Text.UTF8Encoding($false))) }
 function Braino([string]$m) { return $null }

.scratch/_probe/final-probe2.ps1

@@ -1,4 +1,4 @@
-param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work, [int]$HoldSeconds = 5)
+param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work, [int]$HoldSeconds = 5)
 $lines = New-Object System.Collections.Generic.List[string]
 function L($s) { $lines.Add($s); [System.IO.File]::WriteAllLines($OutFile, $lines, (New-Object System.Text.UTF8Encoding($false))) }
 L ("PSVersion: " + $PSVersionTable.PSVersion + "   CLR " + [System.Environment]::Version + "   Redirected=" + [Console]::IsOutputRedirected)

.scratch/_probe/load-probe.ps1

@@ -1,4 +1,4 @@
-param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work)
+param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work)
 $lines = New-Object System.Collections.Generic.List[string]
 function L($s) { $lines.Add($s) }
 L ("PSVersion: " + $PSVersionTable.PSVersion + "  CLR " + [System.Environment]::Version)

.scratch/_probe/load-probe2.ps1

@@ -1,4 +1,4 @@
-param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work, [int]$HoldSeconds = 4)
+param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work, [int]$HoldSeconds = 4)
 $lines = New-Object System.Collections.Generic.List[string]
 function L($s) { $lines.Add($s); [System.IO.File]::WriteAllLines($OutFile, $lines, (New-Object System.Text.UTF8Encoding($false))) }
 L ("PSVersion: " + $PSVersionTable.PSVersion + "   CLR " + [System.Environment]::Version)

.scratch/_probe/noconsole-probe.ps1

@@ -1,4 +1,4 @@
-$outFile = $args[0]
+$outFile = $args[0]
 if (-not $outFile) { $outFile = Join-Path $env:TEMP 'noconsole-probe.txt' }
 $lines = New-Object System.Collections.Generic.List[string]
 function L($s) { $lines.Add($s); Write-Host $s }

.scratch/_probe/settle-probe.ps1

@@ -1,4 +1,4 @@
-param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work, [int]$HoldSeconds = 5)
+param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work, [int]$HoldSeconds = 5)
 $lines = New-Object System.Collections.Generic.List[string]
 function L($s) { $lines.Add($s); [System.IO.File]::WriteAllLines($OutFile, $lines, (New-Object System.Text.UTF8Encoding($false))) }
 L ("PSVersion: " + $PSVersionTable.PSVersion + "   CLR " + [System.Environment]::Version + "   Redirected=" + [Console]::IsOutputRedirected)

.scratch/_probe/settle2-probe.ps1

@@ -1,4 +1,4 @@
-param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work, [int]$HoldSeconds = 6)
+param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work, [int]$HoldSeconds = 6)
 $lines = New-Object System.Collections.Generic.List[string]
 function L($s) { $lines.Add($s); [System.IO.File]::WriteAllLines($OutFile, $lines, (New-Object System.Text.UTF8Encoding($false))) }
 function Asm([string]$n) { return [AppDomain]::CurrentDomain.GetAssemblies() | Where-Object { $_.GetName().Name -eq $n } | Select-Object -First 1 }

.scratch/_probe/tg-probe.ps1

@@ -1,4 +1,4 @@
-param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work)
+param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work)
 $lines = New-Object System.Collections.Generic.List[string]
 function L($s) { $lines.Add($s); [System.IO.File]::WriteAllLines($OutFile, $lines, (New-Object System.Text.UTF8Encoding($false))) }
 L ("PSVersion: " + $PSVersionTable.PSVersion)

.scratch/_probe/tgwin-probe.ps1

@@ -1,4 +1,4 @@
-param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work, [int]$HoldSeconds = 6)
+param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work, [int]$HoldSeconds = 6)
 $lines = New-Object System.Collections.Generic.List[string]
 function L($s) { $lines.Add($s); [System.IO.File]::WriteAllLines($OutFile, $lines, (New-Object System.Text.UTF8Encoding($false))) }
 function Asm([string]$n) { return [AppDomain]::CurrentDomain.GetAssemblies() | Where-Object { $_.GetName().Name -eq $n } | Select-Object -First 1 }

.scratch/_probe/tgwin2-probe.ps1

@@ -1,4 +1,4 @@
-param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work, [int]$HoldSeconds = 6)
+param([Parameter(Mandatory=$true)][string]$OutFile, [Parameter(Mandatory=$true)][string]$Work, [int]$HoldSeconds = 6)
 $lines = New-Object System.Collections.Generic.List[string]
 function L($s) { $lines.Add($s); [System.IO.File]::WriteAllLines($OutFile, $lines, (New-Object System.Text.UTF8Encoding($false))) }
 function Asm([string]$n) { return [AppDomain]::CurrentDomain.GetAssemblies() | Where-Object { $_.GetName().Name -eq $n } | Select-Object -First 1 }

.scratch/_probe/vt-probe.ps1

@@ -1,4 +1,4 @@
-param([Parameter(Mandatory=$true)][string]$OutFile)
+param([Parameter(Mandatory=$true)][string]$OutFile)
 $lines = New-Object System.Collections.Generic.List[string]
 function L($s) { $lines.Add($s) }
 L ("PSVersion: " + $PSVersionTable.PSVersion + "   PSEdition: " + $PSVersionTable.PSEdition)

.scratch/_probe/width-probe.ps1

@@ -1,4 +1,4 @@
-param([Parameter(Mandatory=$true)][string]$HostLabel, [Parameter(Mandatory=$true)][string]$OutFile, [int]$WatchSeconds = 2)
+param([Parameter(Mandatory=$true)][string]$HostLabel, [Parameter(Mandatory=$true)][string]$OutFile, [int]$WatchSeconds = 2)
 $lines = New-Object System.Collections.Generic.List[string]
 function L($s) { $lines.Add($s) }
 $zh       = [string]::Concat([char]0x4E2D, [char]0x6587)

.scratch/_probe/width-probe2.ps1

@@ -1,4 +1,4 @@
-param([Parameter(Mandatory=$true)][string]$HostLabel, [Parameter(Mandatory=$true)][string]$OutFile, [int]$WatchSeconds = 2)
+param([Parameter(Mandatory=$true)][string]$HostLabel, [Parameter(Mandatory=$true)][string]$OutFile, [int]$WatchSeconds = 2)
 $lines = New-Object System.Collections.Generic.List[string]
 function L($s) { $lines.Add($s) }
 function MK([int[]]$cp) { -join ($cp | ForEach-Object { [char]$_ }) }