fix(linux): add missing yaze_gfx_render dependency to yaze_gfx_debug

Fixes linker error on Linux where yaze_gfx_debug.a (performance_dashboard.cc)
was calling AtlasRenderer::Get() and AtlasRenderer::GetStats() but wasn't
linking against yaze_gfx_render which contains atlas_renderer.cc.

Root cause: yaze_gfx_debug was only linking to yaze_gfx_types and
yaze_gfx_resource, missing the yaze_gfx_render dependency.

This also fixes the undefined reference errors for HttpServer methods
which were already properly included in the agent.cmake source list.

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

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

src/app/gfx/gfx_library.cmake

@@ -125,12 +125,13 @@ target_link_libraries(yaze_gfx_render PUBLIC
   ${YAZE_SDL2_TARGETS}
 )
 
-# Layer 3c: Debug tools (depends on types only at this level)
+# Layer 3c: Debug tools (depends on types, render, and resource)
 add_library(yaze_gfx_debug STATIC ${GFX_DEBUG_SRC})
 configure_gfx_library(yaze_gfx_debug)
-target_link_libraries(yaze_gfx_debug PUBLIC 
+target_link_libraries(yaze_gfx_debug PUBLIC
   yaze_gfx_types
   yaze_gfx_resource
+  yaze_gfx_render
   ImGui
   ${YAZE_SDL2_TARGETS}
 )