Add BSA in-memory extraction and nested preview support

bsatk:
- Archive::extractToMemory() extracts a file directly into a byte buffer
  instead of a filesystem path, backed by a std::ostringstream sink.
- Archive::findFile() locates a file by relative path, case-insensitive
  and separator-agnostic, walking the folder tree recursively.
- extractDirect/extractCompressed now take std::ostream& so both the
  ofstream and ostringstream paths share the same implementation.

libbsarch: shim rewrite on Linux to map the Windows API surface onto
bsatk::Archive, enabling preview_bsa to open vanilla BSAs via the
same interface as other plugins.

preview_bsa: double-click on a file in the BSA tree now extracts the
bytes via extractToMemory() and hands them to IOrganizer::previewFileData
for nested preview rendering (e.g. NIF inside a BSA).

uibase + organizerproxy + organizercore: new IOrganizer::previewFileData
virtual that routes in-memory file bytes through the first registered
IPluginPreview matching the extension. Uses heap + WA_DeleteOnClose +
open() to avoid nested exec() softlock from mod info filetree ->
preview_bsa tree -> nif preview.

docker/build-inner.sh: stage preview_nif shaders into plugin_data/shaders
so ShaderManager can load them via IOrganizer::getPluginDataPath().

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

3 files changed, 11 insertions, 0 deletions

diff --git a/src/src/organizercore.h b/src/src/organizercore.h
index dc3547e..834b8a7 100644
--- a/src/src/organizercore.h
+++ b/src/src/organizercore.h
@@ -337,6 +337,8 @@ public:
   bool previewFileWithAlternatives(QWidget* parent, QString filename,

                                    int selectedOrigin = -1);

   bool previewFile(QWidget* parent, const QString& originName, const QString& path);

+  bool previewFileData(QWidget* parent, const QString& fileName,

+                       const QByteArray& fileData);

 

   void loginSuccessfulUpdate(bool necessary);

   void loginFailedUpdate(const QString& message);

diff --git a/src/src/organizerproxy.cpp b/src/src/organizerproxy.cpp
index 80603f0..02e1e20 100644
--- a/src/src/organizerproxy.cpp
+++ b/src/src/organizerproxy.cpp
@@ -387,6 +387,12 @@ MOBase::IGameFeatures* OrganizerProxy::gameFeatures() const
   return m_GameFeaturesProxy.get();

 }

 

+bool OrganizerProxy::previewFileData(QWidget* parent, const QString& fileName,

+                                     const QByteArray& fileData)

+{

+  return m_Proxied->previewFileData(parent, fileName, fileData);

+}

+

 std::shared_ptr<MOBase::IProfile> OrganizerProxy::profile() const

 {

   return m_Proxied->currentProfile();

diff --git a/src/src/organizerproxy.h b/src/src/organizerproxy.h
index f1ede58..ce52d39 100644
--- a/src/src/organizerproxy.h
+++ b/src/src/organizerproxy.h
@@ -75,6 +75,9 @@ public:  // IOrganizer interface
   MOBase::IGameFeatures* gameFeatures() const override;

   MOBase::IInstanceManager* instanceManager() const override { return nullptr; }

 

+  bool previewFileData(QWidget* parent, const QString& fileName,

+                       const QByteArray& fileData) override;

+

   HANDLE startApplication(const QString& executable,

                           const QStringList& args = QStringList(),

                           const QString& cwd = "", const QString& profile = "",