Replace Python plugins with native C++ .so, remove bundled Python (~95MB)

- Add native plugins: form43_checker, script_extender_checker, preview_dds,
  basic_games (75 game defs via IPluginProxy pattern with Steam/GOG detection)
- Remove portable Python from Dockerfile and build-inner.sh
- Add Python settings tab with venv support (system python3 + PyQt6)
- Skip loading plugin_python.so when Python disabled (default: off)
- Update pythonrunner.cpp to use venv at ~/.local/share/fluorine/python-venv/
- Preserve real file permissions in FUSE VFS (fixes native executable +x bits)
- Add FUSE_SET_ATTR_MODE handler so chmod works through VFS
- Fix desktop shortcut Exec= to use fluorine-manager launcher, not bare binary

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/libs/preview_dds_native/src/ddspreview.h b/libs/preview_dds_native/src/ddspreview.h
new file mode 100644
index 0000000..36f2bec
--- /dev/null
+++ b/libs/preview_dds_native/src/ddspreview.h
@@ -0,0 +1,44 @@
+#ifndef DDSPREVIEW_H
+#define DDSPREVIEW_H
+
+#include <set>
+
+#include <QString>
+
+#include <uibase/iplugin.h>
+#include <uibase/ipluginpreview.h>
+
+class DDSPreview : public MOBase::IPluginPreview
+{
+  Q_OBJECT
+  Q_INTERFACES(MOBase::IPlugin MOBase::IPluginPreview)
+  Q_PLUGIN_METADATA(IID "org.tannin.DDSPreviewNative")
+
+public:
+  DDSPreview();
+
+public:  // IPlugin
+  bool init(MOBase::IOrganizer* moInfo) override;
+  QString name() const override;
+  QString localizedName() const override;
+  QString author() const override;
+  QString description() const override;
+  MOBase::VersionInfo version() const override;
+  QList<MOBase::PluginSetting> settings() const override;
+
+public:  // IPluginPreview
+  std::set<QString> supportedExtensions() const override;
+  QWidget* genFilePreview(const QString& fileName,
+                          const QSize& maxSize) const override;
+  bool supportsArchives() const override;
+  QWidget* genDataPreview(const QByteArray& fileData,
+                          const QString& fileName,
+                          const QSize& maxSize) const override;
+
+private:
+  QWidget* buildPreview(class DDSFile& dds, const QSize& maxSize) const;
+
+  MOBase::IOrganizer* m_organizer = nullptr;
+};
+
+#endif  // DDSPREVIEW_H