refactor: use the new utils.ps1 script for operations

01-essentials/04-merge-conflict/verify.ps1

@@ -11,39 +11,18 @@
     - Ensuring valid JSON syntax
 #>
 
+. "$PSScriptRoot\..\..\util.ps1"
+
 $script:allChecksPassed = $true
 
-# ============================================================================
-# Helper Functions
-# ============================================================================
-
-function Write-Pass {
-    param([string]$Message)
-    Write-Host "[PASS] $Message" -ForegroundColor Green
-}
-
-function Write-Fail {
-    param([string]$Message)
-    Write-Host "[FAIL] $Message" -ForegroundColor Red
-    $script:allChecksPassed = $false
-}
-
-function Write-Hint {
-    param([string]$Message)
-    Write-Host "[HINT] $Message" -ForegroundColor Yellow
-}
-
-function Write-Info {
-    param([string]$Message)
-    Write-Host "[INFO] $Message" -ForegroundColor Cyan
-}
+Write-Host $PSScriptRoot
 
 # ============================================================================
 # Check challenge directory exists
 # ============================================================================
 
 if (-not (Test-Path "challenge")) {
-    Write-Host "[ERROR] Challenge directory not found." -ForegroundColor Red
+    Write-Error "Challenge directory not found." -ForegroundColor Red
     Write-Host "Run .\setup.ps1 first to create the challenge environment." -ForegroundColor Yellow
     exit 1
 }
@@ -51,9 +30,8 @@ if (-not (Test-Path "challenge")) {
 Push-Location "challenge"
 
 if (-not (Test-Path ".git")) {
-    Write-Host "[ERROR] Not a git repository." -ForegroundColor Red
+    Write-Error "Not a git repository." -ForegroundColor Red
     Write-Host "Run ..\setup.ps1 first to create the challenge environment." -ForegroundColor Yellow
-    Pop-Location
     exit 1
 }
 
@@ -63,24 +41,7 @@ Write-Host "`n=== Verifying Module 04: Merge Conflicts ===" -ForegroundColor Cya
 # Detect the main branch name (could be main, master, etc.)
 # ============================================================================
 # Try to get the default branch from remote origin first
-$mainBranch = git symbolic-ref refs/remotes/origin/HEAD 2>$null | Split-Path -Leaf
-if (-not $mainBranch) {
-    # Fallback: try to detect from local branches
-    $allBranches = git branch --list 2>$null | ForEach-Object { $_.Trim('* ') }
-    if ($allBranches -contains "main") {
-        $mainBranch = "main"
-    } elseif ($allBranches -contains "master") {
-        $mainBranch = "master"
-    } else {
-        # Get the default branch from git config
-        $mainBranch = git config --get init.defaultBranch
-        if (-not $mainBranch) {
-            # Ultimate fallback: use the first branch
-            $mainBranch = $allBranches | Select-Object -First 1
-            if (-not $mainBranch) { $mainBranch = "main" }
-        }
-    }
-}
+$mainBranch = Get-MainBranch
 Write-Host "Detected main branch: $mainBranch" -ForegroundColor Cyan
 
 # ============================================================================
@@ -100,7 +61,6 @@ if ($currentBranch -eq $mainBranch) {
 if (Test-Path ".git/MERGE_HEAD") {
     Write-Fail "Merge is still in progress (conflicts not resolved)"
     Write-Hint "Resolve conflicts in config.json, then: git add config.json && git commit"
-    Pop-Location
     exit 1
 } else {
     Write-Pass "No merge in progress (conflicts resolved)"
@@ -112,7 +72,6 @@ if (Test-Path ".git/MERGE_HEAD") {
 if (-not (Test-Path "config.json")) {
     Write-Fail "File 'config.json' not found"
     Write-Hint "The config.json file should exist"
-    Pop-Location
     exit 1
 }
 
@@ -120,7 +79,7 @@ if (-not (Test-Path "config.json")) {
 # Verify config.json is valid JSON
 # ============================================================================
 try {
-    $configContent = Get-Content "config.json" -Raw
+    $configContent = Get-Content "$challengeRoot\config.json" -Raw
     $config = $configContent | ConvertFrom-Json -ErrorAction Stop
     Write-Pass "File 'config.json' is valid JSON"
 } catch {