Fix 3.5 KY-009: backlight GPIO27 and G on GPIO21.

Align cyd_35r with CYD_PROJECT_GUIDE (ST7796/GT911), export flashable firmware/cyd_35r.

Co-authored-by: Cursor <cursoragent@cursor.com>

firmware/export_from_build.ps1

@@ -49,11 +49,17 @@ $git = ""
 try { $git = (git -C $root rev-parse --short HEAD).Trim() } catch { $git = "unknown" }
 $date = Get-Date -Format "yyyy-MM-dd"
 $hashes = Get-ChildItem (Join-Path $dst "*.bin") | Get-FileHash -Algorithm SHA256
+$feat = if ($Env -eq "cyd_35r") {
+  "features: ST7796, GT911, BL27, KY009 R22/G21/B4"
+} else {
+  "features: ILI9341, SoftSPI, BL21, KY009 R22/G27/B4"
+}
 $lines = @(
   "name: CYD smdky009ledtest ($dstName)",
   "git: $git",
   "date: $date",
   $boardLine,
+  $feat,
   "flash_size: 4MB",
   "offsets:",
   "  0x1000  bootloader.bin",
@@ -67,21 +73,5 @@ foreach ($h in $hashes) {
 }
 $lines | Set-Content -Encoding utf8 (Join-Path $dst "VERSION.txt")
 
-# Keep / refresh meta.json boardId for catalog filtering
-$metaPath = Join-Path $dst "meta.json"
-if (Test-Path $metaPath) {
-  try {
-    $meta = Get-Content $metaPath -Raw | ConvertFrom-Json
-    $meta.boardId = $boardIdHint
-    if ($Env -eq "cyd_35r" -and $meta.name -notmatch "3\.5") {
-      $meta.name = ($meta.name -replace "\s*$","") + " (3.5\")"
-    }
-    $meta | ConvertTo-Json -Depth 8 | Set-Content -Encoding utf8 $metaPath
-  } catch {
-    Write-Host "meta.json update skipped: $_"
-  }
-} elseif ($Env -eq "cyd_35r") {
-  Write-Host "Note: add firmware/cyd_35r/meta.json with boardId=$boardIdHint for the web catalog"
-}
 
 Write-Host "Exported -> $dst (env=$Env git=$git)"