VFS perf fixes, icon/stylesheet compat, download filename fix

VFS:
- Open backing fd at mo2_open time for read-only handles so mo2_read can
  splice without re-opening the file on every read call.
- Bump RLIMIT_NOFILE at mount time to fit the resulting fd pressure when
  the game keeps hundreds of BSAs open.
- Dedicated node_cache_mutex so resolveByInode / mo2_lookup stop racing
  unordered_map writes while multiple tree_mutex readers are active.
- max_read=1MB + matching conn->max_read and raised max_readahead/max_write
  so the kernel merges Wine's small sequential reads into bigger FUSE
  requests.
- Per-op wall-clock counters in mo2_init() logs so we can distinguish VFS
  latency from game-side work.

Proton launch:
- Write dxvk.conf to the prefix and set DXVK_CONFIG_FILE to force
  dxvk.enableGraphicsPipelineLibrary=False, avoiding long GPL compile
  stalls on first run.

UI / plugin compat:
- Clamp IconDelegate's per-icon width to [8, 16] so narrow content
  columns don't trigger QIcon::pixmap(0,0) returning null and logging
  "failed to load icon" every repaint.
- Pre-create lowercase symlinks in the stylesheet directory so QSS files
  authored on Windows resolve url(foo.svg) when on-disk files are Foo.svg.
- Flip content icons empty-chessboard.png and facegen.png to 8-bit RGBA
  so Qt's built-in PNG reader loads them uniformly.
- Add mobase.Version.canonicalString shim for legacy Python plugins that
  still call the old VersionInfo method on appVersion()'s return.
- BSPluginList: compare normalized plugin name lists instead of byte
  hashes so the post-run case-fix refresh stops spuriously firing the
  "load order changed" dialog.
- BSPluginList disabled by default.

Download manager:
- Parse CDN URL with QUrl + QUrlQuery and read the filename from the
  response-content-disposition query param (RFC 6266 quoted / unquoted /
  ext-value forms), not QFileInfo on the raw URL.
- When the API or URL gives us a CDN object key (no archive extension),
  prefer the actual Content-Disposition header from the live response in
  metaDataChanged and downloadFinished.

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

1 files changed, 66 insertions, 0 deletions

diff --git a/libs/installer_bsplugins/src/GUI/ListDialog.cpp b/libs/installer_bsplugins/src/GUI/ListDialog.cpp
new file mode 100644
index 0000000..784280a
--- /dev/null
+++ b/libs/installer_bsplugins/src/GUI/ListDialog.cpp
@@ -0,0 +1,66 @@
+#include "ListDialog.h"
+#include "ui_listdialog.h"
+
+namespace GUI
+{
+
+ListDialog::ListDialog(IGeometrySettings<QDialog>& settings, QWidget* parent)
+    : QDialog(parent), ui{new Ui::ListDialog}, m_Settings{settings}
+{
+  ui->setupUi(this);
+  ui->filterEdit->setFocus();
+  connect(ui->choiceList, &QListWidget::itemDoubleClicked, this, &QDialog::accept);
+}
+
+ListDialog::~ListDialog() noexcept
+{
+  delete ui;
+}
+
+int ListDialog::exec()
+{
+  GeometrySaver gs{m_Settings, this};
+  return QDialog::exec();
+}
+
+void ListDialog::setChoices(QStringList choices)
+{
+  m_Choices = choices;
+  ui->choiceList->clear();
+  ui->choiceList->addItems(m_Choices);
+}
+
+QString ListDialog::getChoice() const
+{
+  if (ui->choiceList->selectedItems().length()) {
+    return ui->choiceList->currentItem()->text();
+  } else {
+    return "";
+  }
+}
+
+void ListDialog::on_filterEdit_textChanged(QString filter)
+{
+  QStringList newChoices;
+  for (auto choice : m_Choices) {
+    if (choice.contains(filter, Qt::CaseInsensitive)) {
+      newChoices << choice;
+    }
+  }
+  ui->choiceList->clear();
+  ui->choiceList->addItems(newChoices);
+
+  if (newChoices.length() == 1) {
+    QListWidgetItem* item = ui->choiceList->item(0);
+    item->setSelected(true);
+    ui->choiceList->setCurrentItem(item);
+  }
+
+  if (!filter.isEmpty()) {
+    ui->choiceList->setStyleSheet("QListWidget { border: 2px ridge #f00; }");
+  } else {
+    ui->choiceList->setStyleSheet("");
+  }
+}
+
+}  // namespace GUI