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, 63 insertions, 0 deletions

diff --git a/libs/installer_bsplugins/src/MOTools/Loot.h b/libs/installer_bsplugins/src/MOTools/Loot.h
new file mode 100644
index 0000000..414cdab
--- /dev/null
+++ b/libs/installer_bsplugins/src/MOTools/Loot.h
@@ -0,0 +1,63 @@
+#ifndef MOTOOLS_LOOT_H
+#define MOTOOLS_LOOT_H
+
+// LOOT integration stubbed out for Fluorine port.
+// LootDialog/Loot impl/LootGroups removed (depended on Qt WebEngine + lootcli).
+// Only the data types needed by ILootCache / PluginList::m_LootInfo remain.
+
+#include <QString>
+#include <vector>
+
+namespace MOTools
+{
+
+class ILootCache;
+
+class Loot
+{
+public:
+  struct Message
+  {
+    int type = 0;
+    QString text;
+  };
+
+  struct File
+  {
+    QString name;
+    QString displayName;
+  };
+
+  struct Dirty
+  {
+    qint64 crc               = 0;
+    qint64 itm               = 0;
+    qint64 deletedReferences = 0;
+    qint64 deletedNavmesh    = 0;
+    QString cleaningUtility;
+    QString info;
+
+    QString toString(bool isClean) const
+    {
+      Q_UNUSED(isClean);
+      return {};
+    }
+    QString cleaningString() const { return {}; }
+  };
+
+  struct Plugin
+  {
+    QString name;
+    std::vector<File> incompatibilities;
+    std::vector<Message> messages;
+    std::vector<Dirty> dirty, clean;
+    std::vector<QString> missingMasters;
+    bool loadsArchive  = false;
+    bool isMaster      = false;
+    bool isLightMaster = false;
+  };
+};
+
+}  // namespace MOTools
+
+#endif  // MOTOOLS_LOOT_H