fix: Résolution complète du problème OpenGL/ImGui avec threading

PROBLÈME RÉSOLU: Les shaders ImGui compilent maintenant avec succès!

Changements majeurs:
- Remplacé vcpkg ImGui par FetchContent (compilation from source)
- Créé wrapper GLAD pour ImGui (imgui_opengl3_glad.cpp)
- Ajout de makeContextCurrent() pour gérer le contexte OpenGL multi-thread
- Release du contexte dans initialize(), puis rendu current dans uiThread()

Root Cause Analysis:
1. Rendering s'exécute dans uiThread() (thread séparé)
2. Contexte OpenGL créé dans thread principal n'était pas accessible
3. glCreateShader retournait 0 avec GL_INVALID_OPERATION (erreur 1282)
4. Solution: Transfer du contexte OpenGL du thread principal vers uiThread

Debugging profond:
- Ajout de logs debug dans ImGui pour tracer glCreateShader
- Découvert que handle=0 indiquait échec de création (pas compilation)
- Identifié erreur WGL \"ressource en cours d'utilisation\" = contexte locked

Fichiers modifiés:
- vcpkg.json: Supprimé imgui
- CMakeLists.txt: FetchContent pour ImGui + imgui_backends library
- src/imgui_opengl3_glad.cpp: Nouveau wrapper GLAD
- src/ui/TranslationUI.{h,cpp}: Ajout makeContextCurrent()
- src/core/Pipeline.cpp: Appel makeContextCurrent() dans uiThread()
- build/.../imgui_impl_opengl3.cpp: Debug logs (temporaire)

Résultat: UI fonctionne! NVIDIA RTX 4060 GPU, OpenGL 3.3.0, shaders compilent

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.claude/settings.local.json

@@ -0,0 +1,11 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(timeout:*)",
+      "Bash(cmake --build:*)",
+      "Bash(./build_mingw.bat)"
+    ],
+    "deny": [],
+    "ask": []
+  }
+}

CMakeLists.txt

@@ -5,21 +5,51 @@ set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
+# FetchContent for downloading ImGui from source
+include(FetchContent)
+
 # Force static linking for MinGW
 if(MINGW)
     set(BUILD_SHARED_LIBS OFF)
     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static-libgcc -static-libstdc++")
 endif()
 
-# Find packages
+# Fetch ImGui from GitHub (like WarFactory does!)
+FetchContent_Declare(
+  imgui
+  GIT_REPOSITORY https://github.com/ocornut/imgui.git
+  GIT_TAG v1.90.1
+)
+
+FetchContent_MakeAvailable(imgui)
+
+# Create ImGui library with OpenGL/GLFW backends
+add_library(imgui_backends
+    ${imgui_SOURCE_DIR}/imgui.cpp
+    ${imgui_SOURCE_DIR}/imgui_demo.cpp
+    ${imgui_SOURCE_DIR}/imgui_draw.cpp
+    ${imgui_SOURCE_DIR}/imgui_tables.cpp
+    ${imgui_SOURCE_DIR}/imgui_widgets.cpp
+    ${imgui_SOURCE_DIR}/backends/imgui_impl_glfw.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/imgui_opengl3_glad.cpp  # Our wrapper with GLAD
+)
+
+target_include_directories(imgui_backends PUBLIC
+    ${imgui_SOURCE_DIR}
+    ${imgui_SOURCE_DIR}/backends
+)
+
+# Find packages (no more vcpkg imgui!)
 find_package(portaudio CONFIG REQUIRED)
 find_package(httplib CONFIG REQUIRED)
 find_package(nlohmann_json CONFIG REQUIRED)
-find_package(imgui CONFIG REQUIRED)
 find_package(glfw3 CONFIG REQUIRED)
 find_package(glad CONFIG REQUIRED)
 find_package(OpenGL REQUIRED)
 
+# Link imgui_backends with glfw and OpenGL
+target_link_libraries(imgui_backends PUBLIC glfw OpenGL::GL glad::glad)
+
 # Source files for UI version
 set(SOURCES_UI
     src/main.cpp
@@ -73,7 +103,7 @@ if(MINGW AND NOT BUILD_SHARED_LIBS)
         ${CMAKE_CURRENT_BINARY_DIR}/vcpkg_installed/x64-mingw-static/lib/libportaudio.a
         httplib::httplib
         nlohmann_json::nlohmann_json
-        imgui::imgui
+        imgui_backends
         ${CMAKE_CURRENT_BINARY_DIR}/vcpkg_installed/x64-mingw-static/lib/libglfw3.a
         glad::glad
         OpenGL::GL
@@ -95,7 +125,7 @@ else()
         portaudio
         httplib::httplib
         nlohmann_json::nlohmann_json
-        imgui::imgui
+        imgui_backends
         glfw
         glad::glad
         OpenGL::GL

CMakeLists_noui.txt

@@ -0,0 +1,51 @@
+cmake_minimum_required(VERSION 3.20)
+project(SecondVoice_NoUI VERSION 0.1.0 LANGUAGES CXX)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+# Find packages (NO IMGUI, NO GLFW, NO OPENGL)
+find_package(portaudio CONFIG REQUIRED)
+find_package(httplib CONFIG REQUIRED)
+find_package(nlohmann_json CONFIG REQUIRED)
+
+# Source files (NO UI)
+set(SOURCES
+    src/main_no_ui_test.cpp
+    src/audio/AudioCapture.cpp
+    src/audio/AudioBuffer.cpp
+    src/utils/Config.cpp
+)
+
+# Executable
+add_executable(${PROJECT_NAME} ${SOURCES})
+
+# Include directories
+target_include_directories(${PROJECT_NAME} PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}/src
+)
+
+# Link libraries (NO IMGUI)
+target_link_libraries(${PROJECT_NAME} PRIVATE
+    portaudio
+    httplib::httplib
+    nlohmann_json::nlohmann_json
+)
+
+# Compiler options
+if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
+    target_compile_options(${PROJECT_NAME} PRIVATE
+        -Wall
+        -Wextra
+        -Wpedantic
+    )
+
+    if(MINGW)
+        target_link_options(${PROJECT_NAME} PRIVATE -mconsole)
+    endif()
+endif()
+
+# Copy config files to build directory
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/config.json
+               ${CMAKE_CURRENT_BINARY_DIR}/config.json COPYONLY)

CMakeLists_noui_fixed.txt

@@ -0,0 +1,62 @@
+cmake_minimum_required(VERSION 3.20)
+project(SecondVoice_NoUI VERSION 0.1.0 LANGUAGES CXX)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+# Find packages (NO IMGUI, NO GLFW, NO OPENGL)
+find_package(portaudio CONFIG REQUIRED)
+find_package(httplib CONFIG REQUIRED)
+find_package(nlohmann_json CONFIG REQUIRED)
+
+# Source files (NO UI)
+set(SOURCES
+    src/main_no_ui_test.cpp
+    src/audio/AudioCapture.cpp
+    src/audio/AudioBuffer.cpp
+    src/utils/Config.cpp
+)
+
+# Executable
+add_executable(${PROJECT_NAME} ${SOURCES})
+
+# Include directories
+target_include_directories(${PROJECT_NAME} PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}/src
+)
+
+# Link libraries (NO IMGUI) - use static linking for MinGW
+if(MINGW)
+    target_link_libraries(${PROJECT_NAME} PRIVATE
+        ${CMAKE_CURRENT_BINARY_DIR}/vcpkg_installed/x64-mingw-static/lib/libportaudio.a
+        httplib::httplib
+        nlohmann_json::nlohmann_json
+        # Windows system libraries for portaudio
+        winmm
+        setupapi
+    )
+else()
+    target_link_libraries(${PROJECT_NAME} PRIVATE
+        portaudio
+        httplib::httplib
+        nlohmann_json::nlohmann_json
+    )
+endif()
+
+# Compiler options
+if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
+    target_compile_options(${PROJECT_NAME} PRIVATE
+        -Wall
+        -Wextra
+        -Wpedantic
+    )
+
+    if(MINGW)
+        target_link_options(${PROJECT_NAME} PRIVATE -mconsole)
+    endif()
+endif()
+
+# Copy config files to build directory
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/config.json
+               ${CMAKE_CURRENT_BINARY_DIR}/config.json COPYONLY)

create_shortcut.ps1

@@ -0,0 +1,10 @@
+# Create desktop shortcut for SecondVoice
+$WshShell = New-Object -comObject WScript.Shell
+$Shortcut = $WshShell.CreateShortcut("$env:USERPROFILE\Desktop\SecondVoice.lnk")
+$Shortcut.TargetPath = Join-Path $PSScriptRoot "build\mingw-Release\SecondVoice.exe"
+$Shortcut.WorkingDirectory = Join-Path $PSScriptRoot "build\mingw-Release"
+$Shortcut.Description = "SecondVoice - Real-time Chinese to French Translation"
+$Shortcut.Save()
+
+Write-Host "Desktop shortcut created!" -ForegroundColor Green
+Write-Host "Double-click 'SecondVoice' on your desktop to launch" -ForegroundColor Cyan

force_nvidia_gpu.ps1

@@ -0,0 +1,75 @@
+# Force SecondVoice to use NVIDIA GPU
+# Run as Administrator
+
+Write-Host "========================================" -ForegroundColor Cyan
+Write-Host "Force NVIDIA GPU for SecondVoice" -ForegroundColor Cyan
+Write-Host "========================================" -ForegroundColor Cyan
+Write-Host ""
+
+# Check if running as admin
+$isAdmin = ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)
+
+if (-not $isAdmin) {
+    Write-Host "WARNING: Not running as Administrator" -ForegroundColor Yellow
+    Write-Host "Some settings may not apply properly" -ForegroundColor Yellow
+    Write-Host ""
+}
+
+# Get the executable path
+$exePath = Join-Path $PSScriptRoot "build\mingw-Release\SecondVoice.exe"
+$exeFullPath = (Resolve-Path $exePath -ErrorAction SilentlyContinue).Path
+
+if (-not $exeFullPath) {
+    Write-Host "ERROR: SecondVoice.exe not found at:" -ForegroundColor Red
+    Write-Host "  $exePath" -ForegroundColor Red
+    Write-Host ""
+    Write-Host "Please build the project first:" -ForegroundColor Yellow
+    Write-Host "  .\build_mingw.bat" -ForegroundColor Yellow
+    exit 1
+}
+
+Write-Host "Found executable:" -ForegroundColor Green
+Write-Host "  $exeFullPath" -ForegroundColor White
+Write-Host ""
+
+# Method 1: Registry settings for NVIDIA Optimus
+Write-Host "Setting NVIDIA Optimus preference..." -ForegroundColor Cyan
+
+$regPath = "HKCU:\Software\Microsoft\DirectX\UserGpuPreferences"
+
+if (-not (Test-Path $regPath)) {
+    New-Item -Path $regPath -Force | Out-Null
+}
+
+# Set to use high performance GPU (NVIDIA)
+Set-ItemProperty -Path $regPath -Name $exeFullPath -Value "GpuPreference=2;" -Type String
+
+Write-Host "✓ Registry setting applied" -ForegroundColor Green
+Write-Host ""
+
+# Instructions for manual configuration
+Write-Host "========================================" -ForegroundColor Cyan
+Write-Host "Manual Configuration (if needed)" -ForegroundColor Cyan
+Write-Host "========================================" -ForegroundColor Cyan
+Write-Host ""
+Write-Host "If the automatic setting does not work, configure manually:" -ForegroundColor Yellow
+Write-Host ""
+Write-Host "Method 1 - Windows Graphics Settings:" -ForegroundColor White
+Write-Host "  1. Open Windows Settings (Win + I)" -ForegroundColor Gray
+Write-Host "  2. System > Display > Graphics" -ForegroundColor Gray
+Write-Host "  3. Click Browse and select:" -ForegroundColor Gray
+Write-Host "     $exeFullPath" -ForegroundColor Cyan
+Write-Host "  4. Click Options > High performance" -ForegroundColor Gray
+Write-Host "  5. Save" -ForegroundColor Gray
+Write-Host ""
+Write-Host "Method 2 - NVIDIA Control Panel:" -ForegroundColor White
+Write-Host "  1. Right-click desktop > NVIDIA Control Panel" -ForegroundColor Gray
+Write-Host "  2. Manage 3D Settings > Program Settings" -ForegroundColor Gray
+Write-Host "  3. Add SecondVoice.exe" -ForegroundColor Gray
+Write-Host "  4. Select High-performance NVIDIA processor" -ForegroundColor Gray
+Write-Host ""
+Write-Host "========================================" -ForegroundColor Cyan
+Write-Host "✓ Configuration complete!" -ForegroundColor Green
+Write-Host "========================================" -ForegroundColor Cyan
+Write-Host ""
+Write-Host "Please restart SecondVoice for changes to take effect" -ForegroundColor Yellow

run_secondvoice.bat

@@ -0,0 +1,38 @@
+@echo off
+REM Force SecondVoice to use NVIDIA GPU
+
+echo ========================================
+echo SecondVoice - Launcher
+echo ========================================
+echo.
+
+REM Set NVIDIA GPU preference
+set SHIM_MCCOMPAT=0x800000001
+set __COMPAT_LAYER=HIGHDPIAWARE
+
+REM Check if .env exists
+if not exist "build\mingw-Release\.env" (
+    echo [WARNING] .env file not found in build\mingw-Release\
+    echo.
+    echo Please create it with your API keys:
+    echo   OPENAI_API_KEY=sk-...
+    echo   ANTHROPIC_API_KEY=sk-ant-...
+    echo.
+    echo Press any key to continue anyway, or Ctrl+C to cancel
+    pause
+)
+
+echo Starting SecondVoice...
+echo Using NVIDIA GPU (if available)
+echo.
+
+cd build\mingw-Release
+SecondVoice.exe
+
+if %errorlevel% neq 0 (
+    echo.
+    echo [ERROR] SecondVoice exited with error code: %errorlevel%
+    pause
+)
+
+exit /b %errorlevel%

set_gpu.ps1

@@ -0,0 +1,16 @@
+# Set SecondVoice to use NVIDIA GPU
+$exePath = Join-Path $PSScriptRoot "build\mingw-Release\SecondVoice.exe"
+$exeFullPath = (Resolve-Path $exePath).Path
+
+$regPath = "HKCU:\Software\Microsoft\DirectX\UserGpuPreferences"
+
+if (-not (Test-Path $regPath)) {
+    New-Item -Path $regPath -Force | Out-Null
+}
+
+Set-ItemProperty -Path $regPath -Name $exeFullPath -Value "GpuPreference=2;" -Type String
+
+Write-Host "GPU preference set to High Performance for:" -ForegroundColor Green
+Write-Host $exeFullPath -ForegroundColor Cyan
+Write-Host ""
+Write-Host "Please restart SecondVoice" -ForegroundColor Yellow

src/core/Pipeline.cpp

@@ -201,6 +201,9 @@ void Pipeline::processingThread() {
 }
 
 void Pipeline::uiThread() {
+    // CRITICAL: Make OpenGL context current in THIS thread (not the thread that created it)
+    ui_->makeContextCurrent();
+
     while (running_ && !ui_->shouldClose()) {
         ui_->setRecordingDuration(recording_duration_);
         ui_->setProcessingStatus("Processing...");

src/imgui_opengl3_glad.cpp

@@ -0,0 +1,11 @@
+// Wrapper to compile ImGui OpenGL3 backend with GLAD
+// This file includes GLAD before ImGui's OpenGL3 backend to ensure
+// OpenGL functions are properly declared
+
+#include <glad/glad.h>  // MUST be first - provides OpenGL function declarations
+#define IMGUI_IMPL_OPENGL_LOADER_CUSTOM  // Tell ImGui we're providing our own loader
+#define GLFW_INCLUDE_NONE  // Tell GLFW not to include OpenGL headers
+
+// Now include the ImGui OpenGL3 implementation
+// The path is relative to imgui source directory which is in include paths
+#include <backends/imgui_impl_opengl3.cpp>

src/main_absolute_minimal.cpp

@@ -0,0 +1,6 @@
+#include <windows.h>
+
+int main() {
+    MessageBoxA(NULL, "Executable works! This is absolute minimum test.", "Success", MB_OK);
+    return 0;
+}

src/main_minimal.cpp

@@ -0,0 +1,30 @@
+#include <iostream>
+#include <fstream>
+#include <windows.h>
+
+int main() {
+    std::ofstream log("minimal_test.log");
+    log << "Minimal test started" << std::endl;
+    log.flush();
+
+    MessageBoxA(NULL, "Step 1: Program started", "Debug", MB_OK);
+
+    // Test logger
+    log << "Creating logger..." << std::endl;
+    log.flush();
+
+    MessageBoxA(NULL, "Step 2: Logger OK", "Debug", MB_OK);
+
+    // Test config loading
+    log << "Testing config..." << std::endl;
+    log.flush();
+
+    MessageBoxA(NULL, "Step 3: About to load config", "Debug", MB_OK);
+
+    log << "All tests passed" << std::endl;
+    log.close();
+
+    MessageBoxA(NULL, "All steps completed successfully!", "Success", MB_OK);
+
+    return 0;
+}

src/main_no_ui.cpp

@@ -0,0 +1,37 @@
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <windows.h>
+#include "utils/Config.h"
+
+// Simple file logger
+void log_msg(const std::string& msg) {
+    std::ofstream log("main_no_ui.log", std::ios::app);
+    log << msg << std::endl;
+    log.flush();
+}
+
+int main(int argc, char** argv) {
+    (void)argc;
+    (void)argv;
+
+    log_msg("MAIN (NO UI): Entry point reached");
+    MessageBoxA(NULL, "SecondVoice (NO UI) starting...", "Debug", MB_OK);
+
+    log_msg("About to test Config loading...");
+    log_msg("Config header included");
+
+    secondvoice::Config& config = secondvoice::Config::getInstance();
+    log_msg("Config instance obtained");
+
+    if (!config.load("config.json", ".env")) {
+        log_msg("ERROR: Failed to load configuration");
+        MessageBoxA(NULL, "Failed to load configuration!", "Error", MB_OK | MB_ICONERROR);
+        return 1;
+    }
+
+    log_msg("Configuration loaded successfully!");
+    MessageBoxA(NULL, "Config loaded successfully!", "Success", MB_OK);
+
+    return 0;
+}

src/main_no_ui_test.cpp

@@ -0,0 +1,36 @@
+#include <iostream>
+#include <fstream>
+#include "utils/Config.h"
+#include "audio/AudioCapture.h"
+
+int main() {
+    std::ofstream log("no_ui_test.log");
+    log << "No UI test starting..." << std::endl;
+    log.flush();
+
+    log << "About to get Config instance..." << std::endl;
+    log.flush();
+
+    // Test Config
+    secondvoice::Config& config = secondvoice::Config::getInstance();
+
+    log << "Got Config instance, about to load..." << std::endl;
+    log.flush();
+
+    if (!config.load("config.json", ".env")) {
+        log << "Failed to load config" << std::endl;
+        return 1;
+    }
+    log << "Config loaded OK" << std::endl;
+
+    // Test AudioCapture
+    secondvoice::AudioCapture audio(16000, 1, 10);
+    if (!audio.initialize()) {
+        log << "Failed to initialize audio" << std::endl;
+        return 1;
+    }
+    log << "Audio initialized OK" << std::endl;
+
+    log << "SUCCESS - All components work without UI!" << std::endl;
+    return 0;
+}

src/main_skeleton.cpp

@@ -0,0 +1,20 @@
+#include <windows.h>
+#include <fstream>
+
+int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
+    (void)hInstance;
+    (void)hPrevInstance;
+    (void)lpCmdLine;
+    (void)nCmdShow;
+
+    std::ofstream log("skeleton.log");
+    log << "WinMain called!" << std::endl;
+    log.flush();
+
+    MessageBoxA(NULL, "SecondVoice skeleton works! Press OK to continue.", "Success", MB_OK);
+
+    log << "MessageBox shown, now exiting" << std::endl;
+    log.close();
+
+    return 0;
+}

src/startup_hook.cpp

@@ -0,0 +1,10 @@
+#include <fstream>
+
+// This will run BEFORE main() as a static initializer
+struct StartupLogger {
+    StartupLogger() {
+        std::ofstream log("STARTUP.log", std::ios::trunc);
+        log << "Static initializer running BEFORE main()" << std::endl;
+        log.flush();
+    }
+} g_startup_logger;

src/test_glfw_only.cpp

@@ -0,0 +1,18 @@
+#include <GLFW/glfw3.h>
+#include <fstream>
+
+int main() {
+    std::ofstream log("test_glfw.log");
+    log << "GLFW test starting..." << std::endl;
+    log.flush();
+
+    if (!glfwInit()) {
+        log << "GLFW init failed!" << std::endl;
+        return 1;
+    }
+
+    log << "GLFW init SUCCESS!" << std::endl;
+    glfwTerminate();
+
+    return 0;
+}

src/test_static_logger.cpp

@@ -0,0 +1,37 @@
+#include <fstream>
+#include <string>
+#include <windows.h>
+
+// This mimics what we have in TranslationUI.cpp
+class UILogger {
+public:
+    UILogger& operator<<(const std::string& msg) {
+        buffer_ += msg;
+        return *this;
+    }
+    UILogger& operator<<(int value) {
+        buffer_ += std::to_string(value);
+        return *this;
+    }
+    UILogger& operator<<(std::ostream& (*)(std::ostream&)) {
+        std::ofstream log("ui_debug.log", std::ios::app);
+        log << buffer_ << std::endl;
+        buffer_.clear();
+        return *this;
+    }
+    void flush() {}
+private:
+    std::string buffer_;
+};
+
+// This static object might be causing the crash!
+static UILogger g_test_log;
+
+int main() {
+    MessageBoxA(NULL, "If you see this, static UILogger is NOT the problem!", "Test", MB_OK);
+
+    g_test_log << "Test message" << std::endl;
+
+    MessageBoxA(NULL, "Static logger works!", "Success", MB_OK);
+    return 0;
+}

src/ui/TranslationUI.cpp

@@ -5,6 +5,7 @@
 #include <imgui_impl_glfw.h>
 #include <imgui_impl_opengl3.h>
 #include <iostream>
+#include <thread>
 
 namespace secondvoice {
 
@@ -39,11 +40,10 @@ bool TranslationUI::initialize() {
     // FORCE high-performance GPU (NVIDIA/AMD dedicated)
     std::cout << "[UI] Requesting high-performance GPU..." << std::endl;
 
-    // OpenGL 4.6 Core Profile to match NVIDIA driver
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 6);
+    // OpenGL 3.3 - core profile
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
     glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
-    glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
 
     // Create window
     std::cout << "[UI] Creating GLFW window (" << width_ << "x" << height_ << ")..." << std::endl;
@@ -89,12 +89,65 @@ bool TranslationUI::initialize() {
     ImGui::StyleColorsDark();
 
     ImGui_ImplGlfw_InitForOpenGL(window_, true);
-    // Use GLSL 460 core to match OpenGL 4.6
-    ImGui_ImplOpenGL3_Init("#version 460 core");
+
+    // TEST: Compile a simple shader to see REAL error messages
+    std::cout << "[UI] Testing shader compilation..." << std::endl;
+    const char* vertexShaderSource = R"(
+#version 130
+in vec2 Position;
+in vec2 UV;
+in vec4 Color;
+varying vec2 Frag_UV;
+varying vec4 Frag_Color;
+void main() {
+    Frag_UV = UV;
+    Frag_Color = Color;
+    gl_Position = vec4(Position, 0, 1);
+}
+)";
+
+    GLuint testShader = glCreateShader(GL_VERTEX_SHADER);
+    glShaderSource(testShader, 1, &vertexShaderSource, NULL);
+    glCompileShader(testShader);
+
+    GLint success;
+    glGetShaderiv(testShader, GL_COMPILE_STATUS, &success);
+    if (!success) {
+        char infoLog[1024];
+        glGetShaderInfoLog(testShader, 1024, NULL, infoLog);
+        std::cerr << "[UI] ==================== SHADER COMPILATION ERROR ====================" << std::endl;
+        std::cerr << infoLog << std::endl;
+        std::cerr << "[UI] ====================================================================" << std::endl;
+    } else {
+        std::cout << "[UI] Test shader compiled successfully!" << std::endl;
+    }
+    glDeleteShader(testShader);
+
+    // DEBUG: Check if GLAD loaded glCreateShader
+    std::cout << "[UI] DEBUG: glCreateShader function pointer = " << (void*)glCreateShader << std::endl;
+    if (glCreateShader == nullptr) {
+        std::cerr << "[UI] ERROR: glCreateShader is NULL!" << std::endl;
+        return false;
+    }
+
+    // Let ImGui auto-detect the GLSL version
+    ImGui_ImplOpenGL3_Init(nullptr);
+
+    // CRITICAL: Release the OpenGL context from this thread
+    // The UI rendering will happen in a separate thread which will call makeContextCurrent()
+    std::cout << "[UI] Releasing OpenGL context from initialization thread" << std::endl;
+    glfwMakeContextCurrent(nullptr);
 
     return true;
 }
 
+void TranslationUI::makeContextCurrent() {
+    if (window_) {
+        std::cout << "[UI] Making OpenGL context current in thread: " << std::this_thread::get_id() << std::endl;
+        glfwMakeContextCurrent(window_);
+    }
+}
+
 void TranslationUI::render() {
     glfwPollEvents();
 

src/ui/TranslationUI.h

@@ -18,6 +18,7 @@ public:
     ~TranslationUI();
 
     bool initialize();
+    void makeContextCurrent();  // Make OpenGL context current in calling thread
     void render();
     bool shouldClose() const;
 

test_opengl.cpp

@@ -0,0 +1,59 @@
+#include <GLFW/glfw3.h>
+#include <iostream>
+#include <windows.h>
+
+int main() {
+    std::cout << "=== OpenGL Diagnostics ===" << std::endl;
+
+    // Initialize GLFW
+    if (!glfwInit()) {
+        std::cerr << "Failed to initialize GLFW" << std::endl;
+        return 1;
+    }
+
+    // Create a window
+    GLFWwindow* window = glfwCreateWindow(100, 100, "Test", nullptr, nullptr);
+    if (!window) {
+        std::cerr << "Failed to create GLFW window" << std::endl;
+        glfwTerminate();
+        return 1;
+    }
+
+    glfwMakeContextCurrent(window);
+
+    // Query OpenGL info
+    const GLubyte* vendor = glGetString(GL_VENDOR);
+    const GLubyte* renderer = glGetString(GL_RENDERER);
+    const GLubyte* version = glGetString(GL_VERSION);
+
+    std::cout << "\nVendor:   " << (vendor ? (const char*)vendor : "Unknown") << std::endl;
+    std::cout << "Renderer: " << (renderer ? (const char*)renderer : "Unknown") << std::endl;
+    std::cout << "Version:  " << (version ? (const char*)version : "Unknown") << std::endl;
+
+    // Check which GPU is being used via Windows API
+    std::cout << "\n=== GPU Selection Info ===" << std::endl;
+    if (renderer) {
+        std::string renderer_str((const char*)renderer);
+        if (renderer_str.find("NVIDIA") != std::string::npos) {
+            std::cout << "✓ Using NVIDIA GPU (Good!)" << std::endl;
+        } else if (renderer_str.find("AMD") != std::string::npos ||
+                   renderer_str.find("Radeon") != std::string::npos) {
+            std::cout << "⚠ Using AMD integrated GPU" << std::endl;
+            std::cout << "  Try forcing NVIDIA GPU via Windows Graphics Settings" << std::endl;
+        } else if (renderer_str.find("Intel") != std::string::npos) {
+            std::cout << "⚠ Using Intel integrated GPU" << std::endl;
+        } else if (renderer_str.find("Microsoft") != std::string::npos ||
+                   renderer_str.find("GDI") != std::string::npos) {
+            std::cout << "✗ Using Microsoft software renderer (BAD!)" << std::endl;
+            std::cout << "  GPU drivers may not be properly installed" << std::endl;
+        }
+    }
+
+    std::cout << "\nPress Enter to exit..." << std::endl;
+    std::cin.get();
+
+    glfwDestroyWindow(window);
+    glfwTerminate();
+
+    return 0;
+}

vcpkg.json

@@ -5,10 +5,6 @@
     "portaudio",
     "cpp-httplib",
     "nlohmann-json",
-    {
-      "name": "imgui",
-      "features": ["glfw-binding", "opengl3-binding"]
-    },
     "glfw3",
     "glad",
     "opengl"