fix: harden nested package build against collisions and missing assets

- Write nested sub-extension ZIPs to subdirectory to prevent filename
  collisions with outer package ZIPs (deferred ZipArchive::addFile reads)
- Apply exclude patterns to nested top-level files (parity with outer)
- Patch nested manifest with folder="packages" so Joomla finds sub-ZIPs
- Include all top-level directories (not just language/) in nested packages

Claude-Session: https://claude.ai/code/session_01MbEjBtsSjPuTWhqqrMS2wG

cli/release_package.php

@@ -285,7 +285,6 @@ class ReleasePackageCli extends CliFramework
                     echo "  Building nested package: {$subName}\n";
                     $nestedPkgDirs = glob("{$subSourceDir}/packages/*", GLOB_ONLYDIR) ?: [];
 
-                    // Read nested manifest to filter only listed sub-extensions
                     $nestedManifested = [];
                     foreach ($nestedPkgManifests as $npmf) {
                         $npmXml = @simplexml_load_file($npmf);
@@ -299,12 +298,16 @@ class ReleasePackageCli extends CliFramework
                         }
                     }
 
+                    // Use a subdirectory to avoid filename collisions with outer ZIPs
+                    $nestedOutputDir = "{$outputDir}/nested_{$subName}";
+                    @mkdir($nestedOutputDir, 0755, true);
+
                     foreach ($nestedPkgDirs as $npd) {
                         $nestedSubName = basename($npd);
                         if (!empty($nestedManifested) && !isset($nestedManifested[$nestedSubName])) {
                             continue;
                         }
-                        $nestedSubZipPath = "{$outputDir}/{$nestedSubName}.zip";
+                        $nestedSubZipPath = "{$nestedOutputDir}/{$nestedSubName}.zip";
                         $nsZip = new \ZipArchive();
                         if ($nsZip->open($nestedSubZipPath, \ZipArchive::CREATE | \ZipArchive::OVERWRITE) !== true) {
                             continue;
@@ -315,17 +318,38 @@ class ReleasePackageCli extends CliFramework
                         echo "    Nested sub: {$nestedSubName}.zip\n";
                     }
 
-                    // Add top-level files (manifest, script, language)
+                    // Patch nested manifest: ensure folder="packages" so Joomla finds sub-ZIPs
+                    foreach ($nestedPkgManifests as $npmf) {
+                        $npmContent = file_get_contents($npmf);
+                        if ($npmContent !== false
+                            && strpos($npmContent, '<files>') !== false
+                            && strpos($npmContent, 'folder="packages"') === false
+                        ) {
+                            $npmContent = str_replace('<files>', '<files folder="packages">', $npmContent);
+                            file_put_contents($npmf, $npmContent);
+                            echo "    Fixed: added folder=\"packages\" to " . basename($npmf) . "\n";
+                        }
+                    }
+
+                    // Add top-level files (manifest, script, etc.) with exclude filter
                     $nestedTopFiles = array_merge(
                         glob("{$subSourceDir}/*.xml") ?: [],
                         glob("{$subSourceDir}/*.php") ?: []
                     );
                     foreach ($nestedTopFiles as $ntf) {
-                        $subZip->addFile($ntf, basename($ntf));
+                        if (!$this->isExcluded(basename($ntf), $this->excludePatterns)) {
+                            $subZip->addFile($ntf, basename($ntf));
+                        }
                     }
-                    $nestedLangDir = "{$subSourceDir}/language";
-                    if (is_dir($nestedLangDir)) {
-                        $this->addDirToZip($subZip, $nestedLangDir, 'language', $this->excludePatterns);
+
+                    // Add all top-level directories except packages/
+                    $nestedTopDirs = glob("{$subSourceDir}/*", GLOB_ONLYDIR) ?: [];
+                    foreach ($nestedTopDirs as $ntd) {
+                        $ndName = basename($ntd);
+                        if ($ndName === 'packages') {
+                            continue;
+                        }
+                        $this->addDirToZip($subZip, $ntd, $ndName, $this->excludePatterns);
                     }
                 } else {
                     $this->addDirToZip($subZip, $subSourceDir, '', $this->excludePatterns);