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, 111 insertions, 0 deletions

diff --git a/libs/installer_bsplugins/src/CMakeLists.txt b/libs/installer_bsplugins/src/CMakeLists.txt
new file mode 100644
index 0000000..c3c67a1
--- /dev/null
+++ b/libs/installer_bsplugins/src/CMakeLists.txt
@@ -0,0 +1,111 @@
+cmake_minimum_required(VERSION 3.22)
+
+# Fluorine port: simplified from upstream vcpkg-based build.
+# Removed deps: WebEngineWidgets (LOOT dialog gutted), ryml (LootGroups gutted),
+# lootcli (stubbed), lz4 (transitive via bsatk), interprocess/uuid/accumulators
+# boost libs (unused), libbsarch/dds-header (unused). See README / commit for rationale.
+
+find_package(Qt6 REQUIRED COMPONENTS Widgets)
+find_package(ZLIB REQUIRED)
+find_package(Boost CONFIG REQUIRED COMPONENTS thread)
+find_package(Python 3 COMPONENTS Interpreter REQUIRED)
+
+# ── TES form parser codegen (from ParseTES.cmake, simplified: no esp.json fetch,
+# we vendor or skip the generated header on the fly) ──
+include(FetchContent)
+FetchContent_Declare(
+    esp_json
+    GIT_REPOSITORY https://github.com/matortheeternal/esp.json.git
+    GIT_TAG master
+)
+FetchContent_MakeAvailable(esp_json)
+
+set(CODEGEN_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/MakeFormParser.py)
+set(TES_INCLUDE_FILES "")
+foreach(GAME SSE)
+    set(INPUT_FILE ${esp_json_SOURCE_DIR}/data/${GAME}.json)
+    set(OUTPUT_FILE ${CMAKE_CURRENT_BINARY_DIR}/include/FormParser.${GAME}.inl)
+    add_custom_command(
+        OUTPUT ${OUTPUT_FILE}
+        COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_CURRENT_BINARY_DIR}/include
+        COMMAND ${Python_EXECUTABLE} ${CODEGEN_SCRIPT} ${INPUT_FILE} ${OUTPUT_FILE}
+        DEPENDS ${CODEGEN_SCRIPT} ${INPUT_FILE}
+        VERBATIM
+    )
+    list(APPEND TES_INCLUDE_FILES ${OUTPUT_FILE})
+endforeach()
+
+# ── Source collection ──
+file(GLOB_RECURSE BSPLUGINS_SOURCES
+    ${CMAKE_CURRENT_SOURCE_DIR}/BSPluginInfo/*.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/BSPluginList/*.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/GUI/*.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/MOPlugin/*.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/MOTools/*.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/TESData/*.cpp
+)
+file(GLOB_RECURSE BSPLUGINS_HEADERS
+    ${CMAKE_CURRENT_SOURCE_DIR}/BSPluginInfo/*.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/BSPluginList/*.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/GUI/*.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/MOPlugin/*.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/MOTools/*.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/TESData/*.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/TESFile/*.h
+)
+file(GLOB BSPLUGINS_UI
+    ${CMAKE_CURRENT_SOURCE_DIR}/BSPluginInfo/*.ui
+    ${CMAKE_CURRENT_SOURCE_DIR}/BSPluginList/*.ui
+    ${CMAKE_CURRENT_SOURCE_DIR}/GUI/*.ui
+)
+file(GLOB BSPLUGINS_QRC
+    ${CMAKE_CURRENT_SOURCE_DIR}/*.qrc
+)
+
+add_library(bsplugins SHARED
+    ${BSPLUGINS_SOURCES}
+    ${BSPLUGINS_HEADERS}
+    ${BSPLUGINS_UI}
+    ${BSPLUGINS_QRC}
+    ${TES_INCLUDE_FILES}
+)
+
+set_target_properties(bsplugins PROPERTIES
+    AUTOMOC ON
+    AUTOUIC ON
+    AUTORCC ON
+    CXX_STANDARD 20
+    CXX_STANDARD_REQUIRED ON
+)
+
+target_include_directories(bsplugins
+    PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}
+    PRIVATE
+        ${CMAKE_CURRENT_BINARY_DIR}/include
+        # Bare uibase includes (<iplugin.h>, <log.h>, <gameplugins.h>, etc.)
+        ${MO2_UIBASE_INCLUDE_DIRS}
+        # moc's preprocessor needs these on -I so quote-includes like
+        # `#include "IPluginPanel.h"` inside MOPlugin/BSPlugins.h resolve.
+        ${CMAKE_CURRENT_SOURCE_DIR}/MOPlugin
+        ${CMAKE_CURRENT_SOURCE_DIR}/BSPluginInfo
+        ${CMAKE_CURRENT_SOURCE_DIR}/BSPluginList
+        ${CMAKE_CURRENT_SOURCE_DIR}/GUI
+        ${CMAKE_CURRENT_SOURCE_DIR}/MOTools
+        ${CMAKE_CURRENT_SOURCE_DIR}/TESData
+        ${CMAKE_CURRENT_SOURCE_DIR}/TESFile
+)
+
+target_link_libraries(bsplugins PRIVATE
+    mo2::uibase
+    mo2::bsatk
+    Qt6::Widgets
+    Boost::thread
+    ZLIB::ZLIB
+)
+
+# Install into fluorine plugins dir (uses fomod_plus-style shim).
+if(COMMAND mo2_install_plugin)
+    mo2_install_plugin(bsplugins)
+elseif(COMMAND mo2_install_target)
+    mo2_install_target(bsplugins)
+endif()