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, 149 insertions, 0 deletions

diff --git a/libs/installer_bsplugins/src/BSPluginInfo/pluginrecordview.ui b/libs/installer_bsplugins/src/BSPluginInfo/pluginrecordview.ui
new file mode 100644
index 0000000..02d2ce6
--- /dev/null
+++ b/libs/installer_bsplugins/src/BSPluginInfo/pluginrecordview.ui
@@ -0,0 +1,149 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>PluginRecordView</class>
+ <widget class="QWidget" name="PluginRecordView">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>709</width>
+    <height>453</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string notr="true">BGS Data</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <property name="leftMargin">
+    <number>0</number>
+   </property>
+   <property name="topMargin">
+    <number>0</number>
+   </property>
+   <property name="rightMargin">
+    <number>0</number>
+   </property>
+   <property name="bottomMargin">
+    <number>0</number>
+   </property>
+   <item>
+    <widget class="QSplitter" name="splitter">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <widget class="QTreeView" name="pickRecordView">
+      <property name="sizePolicy">
+       <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+        <horstretch>0</horstretch>
+        <verstretch>0</verstretch>
+       </sizepolicy>
+      </property>
+      <property name="minimumSize">
+       <size>
+        <width>150</width>
+        <height>0</height>
+       </size>
+      </property>
+      <property name="contextMenuPolicy">
+       <enum>Qt::CustomContextMenu</enum>
+      </property>
+      <property name="alternatingRowColors">
+       <bool>true</bool>
+      </property>
+      <property name="selectionMode">
+       <enum>QAbstractItemView::ExtendedSelection</enum>
+      </property>
+      <property name="uniformRowHeights">
+       <bool>true</bool>
+      </property>
+     </widget>
+     <widget class="QTreeView" name="recordStructureView">
+      <property name="alternatingRowColors">
+       <bool>true</bool>
+      </property>
+      <property name="selectionMode">
+       <enum>QAbstractItemView::NoSelection</enum>
+      </property>
+      <property name="verticalScrollMode">
+       <enum>QAbstractItemView::ScrollPerPixel</enum>
+      </property>
+      <property name="wordWrap">
+       <bool>true</bool>
+      </property>
+      <attribute name="headerDefaultSectionSize">
+       <number>150</number>
+      </attribute>
+      <attribute name="headerStretchLastSection">
+       <bool>false</bool>
+      </attribute>
+     </widget>
+    </widget>
+   </item>
+   <item>
+    <widget class="QWidget" name="conflictFilterRow" native="true">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout_2">
+      <property name="leftMargin">
+       <number>0</number>
+      </property>
+      <property name="topMargin">
+       <number>0</number>
+      </property>
+      <property name="rightMargin">
+       <number>0</number>
+      </property>
+      <property name="bottomMargin">
+       <number>0</number>
+      </property>
+      <item>
+       <widget class="QComboBox" name="filterCombo">
+        <item>
+         <property name="text">
+          <string>All conflicts</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Winning conflicts</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Losing conflicts</string>
+         </property>
+        </item>
+       </widget>
+      </item>
+      <item>
+       <widget class="QCheckBox" name="ignoreMasterConflicts">
+        <property name="text">
+         <string>Ignore conflicts with masters</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <spacer name="horizontalSpacer_2">
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
+        </property>
+        <property name="sizeHint" stdset="0">
+         <size>
+          <width>780</width>
+          <height>20</height>
+         </size>
+        </property>
+       </spacer>
+      </item>
+     </layout>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>