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, 397 insertions, 0 deletions

diff --git a/libs/installer_bsplugins/src/BSPluginInfo/plugininfodialog.ui b/libs/installer_bsplugins/src/BSPluginInfo/plugininfodialog.ui
new file mode 100644
index 0000000..1b6fc59
--- /dev/null
+++ b/libs/installer_bsplugins/src/BSPluginInfo/plugininfodialog.ui
@@ -0,0 +1,397 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>PluginInfoDialog</class>
+ <widget class="QDialog" name="PluginInfoDialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>1000</width>
+    <height>612</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>BGS Data</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QTabWidget" name="tabWidget">
+     <property name="currentIndex">
+      <number>0</number>
+     </property>
+     <widget class="QWidget" name="tabRecords">
+      <attribute name="title">
+       <string>Records</string>
+      </attribute>
+      <layout class="QVBoxLayout" name="verticalLayout_3">
+       <item>
+        <widget class="BSPluginInfo::PluginRecordView" name="pluginRecordView" native="true">
+         <property name="sizePolicy">
+          <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+           <horstretch>0</horstretch>
+           <verstretch>0</verstretch>
+          </sizepolicy>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </widget>
+     <widget class="QWidget" name="tabArchives">
+      <attribute name="title">
+       <string>Archives</string>
+      </attribute>
+      <layout class="QVBoxLayout" name="verticalLayout_2">
+       <item>
+        <widget class="QTabWidget" name="tabArchivesTabs">
+         <property name="currentIndex">
+          <number>0</number>
+         </property>
+         <widget class="QWidget" name="tabConflictsGeneral">
+          <attribute name="title">
+           <string>Conflicts</string>
+          </attribute>
+          <layout class="QVBoxLayout" name="verticalLayout_5" stretch="0,1,0,1,0,1">
+           <item>
+            <layout class="QVBoxLayout" name="winningRoot">
+             <item>
+              <layout class="QHBoxLayout" name="winningHeader" stretch="1,0,0">
+               <item>
+                <widget class="QToolButton" name="winningExpander">
+                 <property name="sizePolicy">
+                  <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+                   <horstretch>0</horstretch>
+                   <verstretch>0</verstretch>
+                  </sizepolicy>
+                 </property>
+                 <property name="toolTip">
+                  <string>Files that exist in other mods but are overwritten by this mod</string>
+                 </property>
+                 <property name="styleSheet">
+                  <string notr="true">border: none;
+text-align: left;</string>
+                 </property>
+                 <property name="text">
+                  <string>Winning file conflicts:</string>
+                 </property>
+                </widget>
+               </item>
+               <item>
+                <widget class="MOBase::LineEditClear" name="winningLineEdit">
+                 <property name="placeholderText">
+                  <string>Filter</string>
+                 </property>
+                </widget>
+               </item>
+               <item>
+                <widget class="QLCDNumber" name="winningCount">
+                 <property name="frameShadow">
+                  <enum>QFrame::Sunken</enum>
+                 </property>
+                 <property name="lineWidth">
+                  <number>1</number>
+                 </property>
+                 <property name="segmentStyle">
+                  <enum>QLCDNumber::Flat</enum>
+                 </property>
+                </widget>
+               </item>
+              </layout>
+             </item>
+            </layout>
+           </item>
+           <item>
+            <widget class="QTreeView" name="winningTree">
+             <property name="contextMenuPolicy">
+              <enum>Qt::CustomContextMenu</enum>
+             </property>
+             <property name="toolTip">
+              <string>Files that exist in other mods but are overwritten by this mod</string>
+             </property>
+             <property name="alternatingRowColors">
+              <bool>true</bool>
+             </property>
+             <property name="selectionMode">
+              <enum>QAbstractItemView::ExtendedSelection</enum>
+             </property>
+             <property name="textElideMode">
+              <enum>Qt::ElideLeft</enum>
+             </property>
+             <property name="uniformRowHeights">
+              <bool>true</bool>
+             </property>
+             <property name="sortingEnabled">
+              <bool>true</bool>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <layout class="QVBoxLayout" name="losingRoot">
+             <item>
+              <layout class="QHBoxLayout" name="losingHeader" stretch="1,0,0">
+               <item>
+                <widget class="QToolButton" name="losingExpander">
+                 <property name="sizePolicy">
+                  <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+                   <horstretch>0</horstretch>
+                   <verstretch>0</verstretch>
+                  </sizepolicy>
+                 </property>
+                 <property name="toolTip">
+                  <string>Files that are unused because they are overwritten by other mods</string>
+                 </property>
+                 <property name="styleSheet">
+                  <string notr="true">border: none;
+text-align: left;</string>
+                 </property>
+                 <property name="text">
+                  <string>Losing file conflicts:</string>
+                 </property>
+                </widget>
+               </item>
+               <item>
+                <widget class="MOBase::LineEditClear" name="losingLineEdit">
+                 <property name="placeholderText">
+                  <string>Filter</string>
+                 </property>
+                </widget>
+               </item>
+               <item>
+                <widget class="QLCDNumber" name="losingCount">
+                 <property name="frameShadow">
+                  <enum>QFrame::Sunken</enum>
+                 </property>
+                 <property name="segmentStyle">
+                  <enum>QLCDNumber::Flat</enum>
+                 </property>
+                </widget>
+               </item>
+              </layout>
+             </item>
+            </layout>
+           </item>
+           <item>
+            <widget class="QTreeView" name="losingTree">
+             <property name="contextMenuPolicy">
+              <enum>Qt::CustomContextMenu</enum>
+             </property>
+             <property name="toolTip">
+              <string>Files that are unused because they are overwritten by other mods</string>
+             </property>
+             <property name="alternatingRowColors">
+              <bool>true</bool>
+             </property>
+             <property name="selectionMode">
+              <enum>QAbstractItemView::ExtendedSelection</enum>
+             </property>
+             <property name="textElideMode">
+              <enum>Qt::ElideLeft</enum>
+             </property>
+             <property name="uniformRowHeights">
+              <bool>true</bool>
+             </property>
+             <property name="sortingEnabled">
+              <bool>true</bool>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <layout class="QVBoxLayout" name="noConflictRoot">
+             <item>
+              <layout class="QHBoxLayout" name="noConflictHeader" stretch="1,0,0">
+               <item>
+                <widget class="QToolButton" name="noConflictExpander">
+                 <property name="sizePolicy">
+                  <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+                   <horstretch>0</horstretch>
+                   <verstretch>0</verstretch>
+                  </sizepolicy>
+                 </property>
+                 <property name="toolTip">
+                  <string>Files that have no conflicts</string>
+                 </property>
+                 <property name="styleSheet">
+                  <string notr="true">border: none;
+text-align: left;</string>
+                 </property>
+                 <property name="text">
+                  <string>The following files have no conflicts:</string>
+                 </property>
+                </widget>
+               </item>
+               <item>
+                <widget class="MOBase::LineEditClear" name="noConflictLineEdit">
+                 <property name="placeholderText">
+                  <string>Filter</string>
+                 </property>
+                </widget>
+               </item>
+               <item>
+                <widget class="QLCDNumber" name="noConflictCount">
+                 <property name="frameShadow">
+                  <enum>QFrame::Sunken</enum>
+                 </property>
+                 <property name="segmentStyle">
+                  <enum>QLCDNumber::Flat</enum>
+                 </property>
+                </widget>
+               </item>
+              </layout>
+             </item>
+            </layout>
+           </item>
+           <item>
+            <widget class="QTreeView" name="noConflictTree">
+             <property name="contextMenuPolicy">
+              <enum>Qt::CustomContextMenu</enum>
+             </property>
+             <property name="toolTip">
+              <string>Files that have no conflicts</string>
+             </property>
+             <property name="alternatingRowColors">
+              <bool>true</bool>
+             </property>
+             <property name="selectionMode">
+              <enum>QAbstractItemView::ExtendedSelection</enum>
+             </property>
+             <property name="textElideMode">
+              <enum>Qt::ElideLeft</enum>
+             </property>
+             <property name="uniformRowHeights">
+              <bool>true</bool>
+             </property>
+             <property name="sortingEnabled">
+              <bool>true</bool>
+             </property>
+            </widget>
+           </item>
+          </layout>
+         </widget>
+         <widget class="QWidget" name="tabArchivesTree">
+          <attribute name="title">
+           <string>Tree</string>
+          </attribute>
+          <layout class="QVBoxLayout" name="verticalLayout_4">
+           <item>
+            <layout class="QHBoxLayout" name="horizontalLayout_2" stretch="1,0,0">
+             <item>
+              <widget class="QLabel" name="currentArchiveLabel">
+               <property name="text">
+                <string notr="true"/>
+               </property>
+              </widget>
+             </item>
+             <item>
+              <widget class="QPushButton" name="previousArchiveButton">
+               <property name="text">
+                <string/>
+               </property>
+               <property name="icon">
+                <iconset resource="../../../modorganizer/src/resources.qrc">
+                 <normaloff>:/MO/gui/previous</normaloff>:/MO/gui/previous</iconset>
+               </property>
+              </widget>
+             </item>
+             <item>
+              <widget class="QPushButton" name="nextArchiveButton">
+               <property name="text">
+                <string/>
+               </property>
+               <property name="icon">
+                <iconset resource="../../../modorganizer/src/resources.qrc">
+                 <normaloff>:/MO/gui/next</normaloff>:/MO/gui/next</iconset>
+               </property>
+              </widget>
+             </item>
+            </layout>
+           </item>
+           <item>
+            <widget class="QStackedWidget" name="archivesTreeStack"/>
+           </item>
+           <item>
+            <widget class="MOBase::LineEditClear" name="archiveFilterEdit">
+             <property name="baseSize">
+              <size>
+               <width>220</width>
+               <height>0</height>
+              </size>
+             </property>
+             <property name="placeholderText">
+              <string>Filter</string>
+             </property>
+            </widget>
+           </item>
+          </layout>
+         </widget>
+        </widget>
+       </item>
+      </layout>
+     </widget>
+    </widget>
+   </item>
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QPushButton" name="previousFile">
+       <property name="text">
+        <string>Previous</string>
+       </property>
+       <property name="autoDefault">
+        <bool>false</bool>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="nextFile">
+       <property name="text">
+        <string>Next</string>
+       </property>
+       <property name="autoDefault">
+        <bool>false</bool>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <spacer name="horizontalSpacer">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>40</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+     <item>
+      <widget class="QPushButton" name="close">
+       <property name="text">
+        <string>Close</string>
+       </property>
+       <property name="autoDefault">
+        <bool>false</bool>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>MOBase::LineEditClear</class>
+   <extends>QLineEdit</extends>
+   <header>lineeditclear.h</header>
+  </customwidget>
+  <customwidget>
+   <class>BSPluginInfo::PluginRecordView</class>
+   <extends>QWidget</extends>
+   <header>BSPluginInfo/PluginRecordView.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
+ <resources>
+  <include location="../../../modorganizer/src/resources.qrc"/>
+ </resources>
+ <connections/>
+</ui>