feat: uclaude_updater — automatic client updater

- uclaude_updater.py — auto-detect version, install cli.js, patch settings
- uclaude_update.sh/bat/ps1 — platform wrappers (git pull + run updater)
- patcher.config.json — shared API config
- Updated README with full usage instructions

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

uclaude_update.ps1

@@ -0,0 +1,20 @@
+# UClaude Updater — automatic Claude Code patch updater
+# Usage: powershell -ExecutionPolicy Bypass -File uclaude_update.ps1 [--check] [--force] [--settings-only]
+
+$ErrorActionPreference = "Continue"
+$ScriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
+Set-Location $ScriptDir
+
+# Pull latest artifacts
+git pull --quiet 2>$null
+
+# Check admin
+$isAdmin = ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)
+if (-not $isAdmin) {
+    Write-Host "Re-running as Administrator..." -ForegroundColor Yellow
+    Start-Process powershell -ArgumentList "-ExecutionPolicy Bypass -File `"$($MyInvocation.MyCommand.Path)`" $args" -Verb RunAs
+    exit
+}
+
+# Run updater
+& python uclaude_updater.py @args