ci: Add size benchmarks

.github/actions/manual-ios-signing/action.yml

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+name: Manual iOS Signing
+description: Sets up keychain, imports certificate and provisioning profile, exports PROVISIONING_UUID and CODESIGN_KEY.
+author: unoplatform
+
+inputs:
+  certificate-base64:
+    description: Base64 encoded P12 certificate
+    required: true
+  certificate-password:
+    description: Password for the P12 certificate
+    required: true
+  provisioning-profile-base64:
+    description: Base64 encoded iOS provisioning profile (.mobileprovision)
+    required: true
+  codesign-key:
+    description: Codesign identity to use (e.g. Apple Development)
+    required: false
+    default: Apple Development
+
+outputs:
+  provisioning-uuid:
+    description: Extracted UUID of the imported provisioning profile
+    value: ${{ steps.signing.outputs.provisioning-uuid }}
+
+runs:
+  using: composite
+  steps:
+    - name: Decode certificate and provisioning profile
+      id: signing
+      shell: bash
+      run: |
+        set -euo pipefail
+        certInput='${{ inputs.certificate-base64 }}'
+        passInput='${{ inputs.certificate-password }}'
+        provInput='${{ inputs.provisioning-profile-base64 }}'
+        keyInput='${{ inputs.codesign-key }}'
+
+        if [ -z "$certInput" ] || [ -z "$passInput" ] || [ -z "$provInput" ]; then
+          echo "Missing required inputs" >&2
+          exit 1
+        fi
+
+        certPath="$RUNNER_TEMP/ios_cert.p12"
+        provPath="$RUNNER_TEMP/ios_profile.mobileprovision"
+        echo "$certInput" | base64 --decode > "$certPath"
+        echo "$provInput" | base64 --decode > "$provPath"
+
+        security create-keychain -p temp ios-signing.keychain
+        security import "$certPath" -k ios-signing.keychain -P "$passInput" -T /usr/bin/codesign
+        security list-keychains -s ios-signing.keychain
+        security unlock-keychain -p temp ios-signing.keychain
+        security set-keychain-settings -t 3600 -l ~/Library/Keychains/ios-signing.keychain
+        security set-key-partition-list -S apple-tool:,apple: -s -k temp ios-signing.keychain
+
+        provPlist="$RUNNER_TEMP/profile.plist"
+        security cms -D -i "$provPath" > "$provPlist"
+        uuid=$( /usr/libexec/PlistBuddy -c 'Print :UUID' "$provPlist" )
+        echo "Provisioning Profile UUID: $uuid"
+        echo "PROVISIONING_UUID=$uuid" >> "$GITHUB_ENV"
+        echo "CODESIGN_KEY=$keyInput" >> "$GITHUB_ENV"
+        echo "provisioning-uuid=$uuid" >> "$GITHUB_OUTPUT"
+
+        mkdir -p "$HOME/Library/MobileDevice/Provisioning Profiles"
+        cp "$provPath" "$HOME/Library/MobileDevice/Provisioning Profiles/$uuid.mobileprovision"
+
+    - name: Output summary
+      shell: bash
+      run: |
+        echo "Manual iOS signing configured. UUID=$PROVISIONING_UUID" >> "$GITHUB_STEP_SUMMARY"

.github/scripts/template-size-tracking/compare-and-alert.ps1

@@ -0,0 +1,222 @@
+#!/usr/bin/env pwsh
+<#
+.SYNOPSIS
+    Compares current metrics with previous day and generates alerts.
+
+.PARAMETER CurrentMetricsPath
+    Path to current metrics directory.
+
+.PARAMETER PreviousMetricsPath
+    Path to previous metrics directory.
+
+.PARAMETER AlertThreshold
+    Percentage threshold for alerts (default: 10).
+
+.PARAMETER FailureThreshold
+    Percentage threshold for critical failures (default: 20).
+#>
+
+param(
+    [Parameter(Mandatory=$true)]
+    [string]$CurrentMetricsPath,
+
+    [Parameter(Mandatory=$true)]
+    [string]$PreviousMetricsPath,
+
+    [Parameter(Mandatory=$false)]
+    [decimal]$AlertThreshold = 10,
+
+    [Parameter(Mandatory=$false)]
+    [decimal]$FailureThreshold = 20
+)
+
+$ErrorActionPreference = "Stop"
+
+Write-Host "=== Comparing Metrics ===" -ForegroundColor Cyan
+Write-Host "Alert Threshold: $AlertThreshold%"
+Write-Host "Failure Threshold: $FailureThreshold%"
+
+# Load current metrics
+$currentMetrics = @()
+$currentFiles = Get-ChildItem -Path $CurrentMetricsPath -Filter "*.json" -Recurse
+
+foreach ($file in $currentFiles) {
+    $content = Get-Content $file.FullName -Raw | ConvertFrom-Json
+    $currentMetrics += $content
+}
+
+Write-Host "Loaded $($currentMetrics.Count) current metrics"
+
+# Load previous metrics if they exist
+$previousMetrics = @()
+if (Test-Path $PreviousMetricsPath) {
+    $previousFiles = Get-ChildItem -Path $PreviousMetricsPath -Filter "*.json" -Recurse
+
+    foreach ($file in $previousFiles) {
+        try {
+            $content = Get-Content $file.FullName -Raw | ConvertFrom-Json
+            $previousMetrics += $content
+        } catch {
+            Write-Warning "Could not parse previous metric file: $($file.Name)"
+        }
+    }
+
+    Write-Host "Loaded $($previousMetrics.Count) previous metrics"
+} else {
+    Write-Host "No previous metrics found - this appears to be the first run"
+}
+
+# Compare metrics
+$comparisons = @()
+$alerts = @()
+$criticalAlerts = @()
+
+foreach ($current in $currentMetrics) {
+    # Find matching previous metric
+    $previous = $previousMetrics | Where-Object {
+        $_.dotnetVersion -eq $current.dotnetVersion -and
+        $_.template -eq $current.template -and
+        $_.platform -eq $current.platform
+    } | Select-Object -First 1
+
+    $comparison = @{
+        dotnetVersion = $current.dotnetVersion
+        template = $current.template
+        platform = $current.platform
+        currentSize = $current.packageSize
+        currentBuildTime = $current.buildTimeSeconds
+        previousSize = if ($previous) { $previous.packageSize } else { 0 }
+        previousBuildTime = if ($previous) { $previous.buildTimeSeconds } else { 0 }
+        sizeChange = 0
+        sizeChangePercent = 0
+        buildTimeChange = 0
+        buildTimeChangePercent = 0
+        status = "new"
+    }
+
+    if ($previous) {
+        if ($previous.packageSize -gt 0) {
+            $comparison.sizeChange = $current.packageSize - $previous.packageSize
+            $comparison.sizeChangePercent = [math]::Round(($comparison.sizeChange / $previous.packageSize) * 100, 2)
+        }
+
+        if ($previous.buildTimeSeconds -gt 0) {
+            $comparison.buildTimeChange = $current.buildTimeSeconds - $previous.buildTimeSeconds
+            $comparison.buildTimeChangePercent = [math]::Round(($comparison.buildTimeChange / $previous.buildTimeSeconds) * 100, 2)
+        }
+
+        # Determine status
+        if ($comparison.sizeChangePercent -ge $FailureThreshold) {
+            $comparison.status = "critical"
+            $criticalAlerts += $comparison
+        } elseif ($comparison.sizeChangePercent -ge $AlertThreshold) {
+            $comparison.status = "alert"
+            $alerts += $comparison
+        } elseif ($comparison.sizeChangePercent -gt 0) {
+            $comparison.status = "increased"
+        } elseif ($comparison.sizeChangePercent -lt 0) {
+            $comparison.status = "decreased"
+        } else {
+            $comparison.status = "unchanged"
+        }
+    }
+
+    $comparisons += $comparison
+}
+
+# Save comparison results
+$comparisons | ConvertTo-Json -Depth 10 | Out-File -FilePath "comparison.json" -Encoding UTF8
+
+# Generate alert report if needed
+if ($alerts.Count -gt 0 -or $criticalAlerts.Count -gt 0) {
+    Write-Host "`n⚠️  ALERTS DETECTED!" -ForegroundColor Red
+
+    $alertReport = @"
+# ⚠️ Template Size Alert - $(Get-Date -Format "yyyy-MM-dd")
+
+Significant size increases detected in Uno Platform templates.
+
+"@
+
+    if ($criticalAlerts.Count -gt 0) {
+        $alertReport += @"
+
+## 🔴 Critical Increases (>$FailureThreshold%)
+
+| Template | Platform | .NET | Previous | Current | Change |
+|----------|----------|------|----------|---------|--------|
+
+"@
+
+        foreach ($alert in $criticalAlerts) {
+            $prevMB = [math]::Round($alert.previousSize / 1MB, 2)
+            $currMB = [math]::Round($alert.currentSize / 1MB, 2)
+            $change = "+$($alert.sizeChangePercent)%"
+
+            $alertReport += "| $($alert.template) | $($alert.platform) | $($alert.dotnetVersion) | $prevMB MB | $currMB MB | $change 🔴 |`n"
+        }
+    }
+
+    if ($alerts.Count -gt 0) {
+        $alertReport += @"
+
+## 🟡 Notable Increases (>$AlertThreshold%)
+
+| Template | Platform | .NET | Previous | Current | Change |
+|----------|----------|------|----------|---------|--------|
+
+"@
+
+        foreach ($alert in $alerts) {
+            $prevMB = [math]::Round($alert.previousSize / 1MB, 2)
+            $currMB = [math]::Round($alert.currentSize / 1MB, 2)
+            $change = "+$($alert.sizeChangePercent)%"
+
+            $alertReport += "| $($alert.template) | $($alert.platform) | $($alert.dotnetVersion) | $prevMB MB | $currMB MB | $change 🟡 |`n"
+        }
+    }
+
+    $storageAccount = $env:AZURE_STORAGE_ACCOUNT
+    $date = Get-Date
+    $year = $date.ToString("yyyy")
+    $dateTime = $date.ToString("MM-dd-HH-mm")
+
+    $alertReport += @"
+
+## Details
+
+- **Workflow Run**: [View Details]($($env:GITHUB_SERVER_URL)/$($env:GITHUB_REPOSITORY)/actions/runs/$($env:GITHUB_RUN_ID))
+- **Azure Storage**: [View Metrics](https://${storageAccount}.blob.core.windows.net/template-size-tracking/$year/$dateTime/)
+- **Alert Threshold**: $AlertThreshold%
+- **Failure Threshold**: $FailureThreshold%
+
+---
+*This issue was automatically generated by the daily template size tracking workflow.*
+"@
+
+    $alertReport | Out-File -FilePath "alert-report.md" -Encoding UTF8
+
+    # Set output for GitHub Actions
+    Add-Content -Path $env:GITHUB_OUTPUT -Value "alert=true"
+
+    if ($criticalAlerts.Count -gt 0) {
+        Add-Content -Path $env:GITHUB_OUTPUT -Value "critical=true"
+        Write-Host "Critical alerts: $($criticalAlerts.Count)" -ForegroundColor Red
+    } else {
+        Add-Content -Path $env:GITHUB_OUTPUT -Value "critical=false"
+    }
+} else {
+    Write-Host "`n✓ No significant size increases detected" -ForegroundColor Green
+    Add-Content -Path $env:GITHUB_OUTPUT -Value "alert=false"
+    Add-Content -Path $env:GITHUB_OUTPUT -Value "critical=false"
+}
+
+# Output summary
+Write-Host "`n=== Comparison Summary ===" -ForegroundColor Cyan
+Write-Host "Total comparisons: $($comparisons.Count)"
+Write-Host "New entries: $(($comparisons | Where-Object { $_.status -eq 'new' }).Count)"
+Write-Host "Decreased: $(($comparisons | Where-Object { $_.status -eq 'decreased' }).Count)"
+Write-Host "Unchanged: $(($comparisons | Where-Object { $_.status -eq 'unchanged' }).Count)"
+Write-Host "Increased: $(($comparisons | Where-Object { $_.status -eq 'increased' }).Count)"
+Write-Host "Alerts: $($alerts.Count)" -ForegroundColor Yellow
+Write-Host "Critical: $($criticalAlerts.Count)" -ForegroundColor Red