chore: enhance CMake linking for yaze_agent in test suites

- Updated CMake configuration to conditionally apply whole-archive linking for the `yaze_agent` target on Unix-like systems, ensuring all necessary symbols are included.
- Maintained standard linking for Windows while improving compatibility across platforms.

Benefits:
- Increases build stability and ensures proper symbol inclusion for test support libraries, reducing potential linker errors.

src/app/test/test.cmake

@@ -70,7 +70,19 @@ endif()
 # Link agent library if available (for z3ed test suites)
 # yaze_agent contains all the CLI service code (tile16_proposal_generator, gui_automation_client, etc.)
 if(TARGET yaze_agent)
-  target_link_libraries(yaze_test_support PUBLIC yaze_agent)
+  # Use whole-archive on Unix to ensure agent symbols (GuiAutomationClient etc) are included
+  if(APPLE)
+    target_link_options(yaze_test_support PUBLIC 
+      "LINKER:-force_load,$<TARGET_FILE:yaze_agent>")
+    target_link_libraries(yaze_test_support PUBLIC yaze_agent)
+  elseif(UNIX)
+    target_link_libraries(yaze_test_support PUBLIC 
+      -Wl,--whole-archive yaze_agent -Wl,--no-whole-archive)
+  else()
+    # Windows: Normal linking
+    target_link_libraries(yaze_test_support PUBLIC yaze_agent)
+  endif()
+  
   if(YAZE_WITH_GRPC)
     message(STATUS "✓ z3ed test suites enabled with gRPC support")
   else()