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, 36 insertions, 0 deletions

diff --git a/libs/preview_dds_native/src/ddswidget.h b/libs/preview_dds_native/src/ddswidget.h
new file mode 100644
index 0000000..968e253
--- /dev/null
+++ b/libs/preview_dds_native/src/ddswidget.h
@@ -0,0 +1,36 @@
+#ifndef DDSWIDGET_H
+#define DDSWIDGET_H
+
+#include "ddsfile.h"
+
+#include <QOpenGLBuffer>
+#include <QOpenGLFunctions>
+#include <QOpenGLShaderProgram>
+#include <QOpenGLTexture>
+#include <QOpenGLWidget>
+
+class DDSWidget : public QOpenGLWidget, protected QOpenGLFunctions
+{
+  Q_OBJECT
+
+public:
+  explicit DDSWidget(const DDSFile& dds, QWidget* parent = nullptr);
+  ~DDSWidget() override;
+
+protected:
+  void initializeGL() override;
+  void resizeGL(int w, int h) override;
+  void paintGL() override;
+
+private:
+  void uploadTexture();
+  void setupShaders();
+
+  const DDSFile& m_dds;
+  QOpenGLTexture* m_texture      = nullptr;
+  QOpenGLShaderProgram* m_shader = nullptr;
+  QOpenGLBuffer m_vbo;
+  float m_aspectRatio = 1.0f;
+};
+
+#endif  // DDSWIDGET_H