refactor: window (#34)

* build: add SDL3 dependency

* refactor(window): migrate from GLFW to SDL3 for window and input

* refactor: remove unused GLFW includes and commented-out code

* refactor(input): use relative mouse motion and simplify camera mouse update

* refactor(event-handling): guard input events with imgui state

Move mouse enable/disable logic into set_imgui_enabled and check imgui_enable before forwarding non-ImGui events to handlers. This prevents duplicate processing and ensures proper mouse state when toggling ImGui.

* fix(camera): reset camera on resize events and fix input handling on imgui toggle

- Add Camera::player() accessor.
- Handle WindowResizeEvent and FrameBufferResizeEvent to reset camera.
- Fix escape key handling to disable mouse before toggling imgui.
- Fix left alt handling to toggle mouse state correctly.
- Reset player key status when toggling imgui.

* fix(client_world): add direct exit flag to break connection error loop

* refactor(debug): add d_rep template and remove widget ID

* feat(debug_collector): add video driver display to debug UI

* fix: invert debug flag logic and rename to no_debug

The previous 'debug_on' field was never set to true by default, causing
debug mode to never be enabled. Now renamed to 'no_debug' and the
renderer initializes with debug enabled unless the --no-debug flag is
given.

* feat(window): add video driver selection via config and --video-driver argument

* ci: add vcpkg cache

* fix: mscv cpp version show

* fix: context delete too early

* fix: ci build fail

* fix: opengl resource delete error

* fix: add // NOLINT for NvOptimusEnablement and AmdPowerXpressRequestHighPerformance

* fix: windows ime fail on fullscreen

* feat(ui): update text input area on field changes and window resize

* fix(ui): initialize m_app pointer to nullptr

* feat(window): add exclusive fullscreen support with WM detection

* refactor: simplify WM detection and exclusive fullscreen default

Removed WindowManager enum; detect_wm() now returns string directly.
Default exclusive fullscreen based on platform (true on Linux).
Added WM info to debug overlay.

* feat: add Alt key to close ImGui; clarify debug log

* refactor(dev-panel): remove direct settings UI from settings tab

src/tools/font.cpp

@@ -2,6 +2,9 @@
 
 #include "Cubed/tools/cubed_assert.hpp"
 #include "Cubed/tools/log.hpp"
+
+#include <memory>
+
 namespace fs = std::filesystem;
 
 namespace Cubed {
@@ -72,10 +75,13 @@ void Font::upload_glyph(Glyph& glyph, const unsigned char* buffer) {
                     glyph.size.y / float(CELL_SIZE)};
 }
 
-Font& Font::get() {
-    static Font font;
+Font& Font::get() { return *get_ptr(); }
+std::unique_ptr<Font>& Font::get_ptr() {
+    static std::unique_ptr<Font> font = std::make_unique<Font>();
     return font;
 }
+void Font::destroy() { get_ptr().reset(); }
+
 TextMesh Font::vertices(const std::string& text) {
 
     hb_buffer_t* buffer = hb_buffer_create();