fix(build): publish from each project directory

Run dotnet publish from within Desktop/Browser/Android project folders and correct project paths. Ensures script works when invoked from ./src.

src/build.ps1

@@ -1,6 +1,6 @@
 #!/usr/bin/env pwsh
 <#
-  build.ps1 – cross-platform build for Avalonia (Windows exe, Web/WASM, Android APK)
+  build.ps1 - cross-platform build for Avalonia (Windows exe, Web/WASM, Android APK)
   Usage:
     pwsh ./build.ps1                      # build all
     pwsh ./build.ps1 -Targets win         # just Windows
@@ -16,14 +16,16 @@ param(
 
 $ErrorActionPreference = 'Stop'
 
-# --- PROJECT PATHS (tweak to your repo) ---
-$ProjDesktop = 'src/AdvancedCalculator/AdvancedCalculator.csproj'
-$ProjWeb     = 'src/AdvancedCalculator/AdvancedCalculator.csproj' # same csproj if multi-targeting Browser
-$ProjAndroid = 'src/AdvancedCalculator.Android/AdvancedCalculator.Android.csproj'
+# Always anchor to the folder containing this script (repo/src)
+$Root = Split-Path -Parent $MyInvocation.MyCommand.Path
+Set-Location $Root
+
+# --- PROJECT PATHS (relative to repo/src) ---
+$ProjDesktop = 'AdvancedCalculator.Desktop/AdvancedCalculator.Desktop.csproj'
+$ProjWeb     = 'AdvancedCalculator.Browser/AdvancedCalculator.Browser.csproj'
+$ProjAndroid = 'AdvancedCalculator.Android/AdvancedCalculator.Android.csproj'
 
 # --- ARTIFACTS ---
-$Root      = Split-Path -Parent $MyInvocation.MyCommand.Path
-Set-Location $Root
 $Artifacts = Join-Path $Root 'artifacts'
 $OutWin    = Join-Path $Artifacts 'win-x64'
 $OutWeb    = Join-Path $Artifacts 'web'
@@ -41,6 +43,23 @@ function Invoke-Dotnet {
   if ($code -ne 0) { throw "dotnet exited with $code" }
 }
 
+# Run a dotnet command from within the project's directory
+function Invoke-InProjectDir {
+  param(
+    [Parameter(Mandatory=$true)][string]$ProjectPath,
+    [Parameter(ValueFromRemainingArguments = $true)][string[]]$Args
+  )
+  $projDir  = Split-Path -Parent $ProjectPath
+  $projFile = Split-Path -Leaf $ProjectPath
+  Push-Location $projDir
+  try {
+    Invoke-Dotnet @Args $projFile
+  }
+  finally {
+    Pop-Location
+  }
+}
+
 # --- Version (git tag 'vX.Y.Z' > explicit > empty) ---
 if (-not $Version) {
   try {
@@ -59,7 +78,7 @@ Invoke-Dotnet workload restore
 if ($Targets -contains 'win') {
   # Windows desktop single-file exe (buildable from any OS)
   $args = @(
-    'publish', $ProjDesktop,
+    'publish',
     '-c', $Configuration,
     '-r', 'win-x64',
     '--self-contained', 'true',
@@ -68,20 +87,20 @@ if ($Targets -contains 'win') {
     '-o', $OutWin
   )
   if ($Version) { $args += "-p:Version=$Version" }
-  Invoke-Dotnet @args
+  Invoke-InProjectDir -ProjectPath $ProjDesktop @args
 }
 
 if ($Targets -contains 'web') {
   # Browser/WASM (Avalonia Web)
   $args = @(
-    'publish', $ProjWeb,
+    'publish',
     '-c', $Configuration,
     '-r', 'browser-wasm',
     '--self-contained', 'true',
     '-o', $OutWeb
   )
   if ($Version) { $args += "-p:Version=$Version" }
-  Invoke-Dotnet @args
+  Invoke-InProjectDir -ProjectPath $ProjWeb @args
 
   Set-Content -Path (Join-Path $OutWeb 'README.txt') -Value @'
 Serve these files over HTTP(S). Do not open index.html via file://
@@ -92,7 +111,7 @@ Place the folder behind any static web server.
 if ($Targets -contains 'android') {
   # Android APK (unsigned unless env vars provided)
   $baseArgs = @(
-    'publish', $ProjAndroid,
+    'publish',
     '-c', $Configuration,
     '-r', 'android-arm64',
     '--self-contained', 'true',
@@ -102,7 +121,7 @@ if ($Targets -contains 'android') {
   if ($Version) { $baseArgs += "-p:Version=$Version" }
 
   # Unsigned build
-  Invoke-Dotnet @baseArgs
+  Invoke-InProjectDir -ProjectPath $ProjAndroid @baseArgs
 
   # Optional signing if env vars are set
   if ($env:ANDROID_KEYSTORE -and $env:ANDROID_KEY_ALIAS -and $env:ANDROID_KEY_PASSWORD) {
@@ -113,7 +132,7 @@ if ($Targets -contains 'android') {
       "-p:AndroidSigningKeyPass=$($env:ANDROID_KEY_PASSWORD)",
       "-p:AndroidSigningStorePass=$($env:ANDROID_KEY_PASSWORD)"
     )
-    Invoke-Dotnet @signArgs
+    Invoke-InProjectDir -ProjectPath $ProjAndroid @signArgs
   }
 }
 
@@ -121,3 +140,4 @@ Write-Host "`nArtifacts -> $Artifacts" -ForegroundColor Green
 Write-Host "  Windows: $OutWin" -ForegroundColor Green
 Write-Host "  Web:     $OutWeb" -ForegroundColor Green
 Write-Host "  Android: $OutDroid" -ForegroundColor Green
+