Split visualizer into example/ sub-project

- Move renderer.h/cpp and ui_renderer.h/cpp to example/src/
- Move main.cpp to example/src/
- Move raylib and raygui submodules to example/ext/
- Keep tomlc17 submodule at root (library-only dependency)
- Root Makefile builds liborbit.a static library + tests
- example/Makefile builds orbit_sim, links liborbit.a
- All build artifacts go to ./build/ via recursive BUILD_DIR
- Remove example/tests/ (sim configs run from project root)

.gitmodules

@@ -1,9 +1,9 @@
-[submodule "ext/raylib"]
-	path = ext/raylib
-	url = https://github.com/raysan5/raylib.git
 [submodule "ext/tomlc17"]
 	path = ext/tomlc17
 	url = https://github.com/cktan/tomlc17
-[submodule "ext/raygui"]
-	path = ext/raygui
+[submodule "example/ext/raylib"]
+	path = example/ext/raylib
+	url = https://github.com/raysan5/raylib.git
+[submodule "example/ext/raygui"]
+	path = example/ext/raygui
 	url = https://github.com/raysan5/raygui.git

Makefile

@@ -1,87 +1,57 @@
-# Compiler and flags
 CXX = g++
 CXXFLAGS = -Wall -Wextra -g -ggdb3 -std=c++14 \
 		   -I./src \
-		   -isystem./ext/tomlc17/src \
-		   -isystem./ext/raylib/src \
-		   -isystem./ext/raygui/src \
-		   -isystem./ext/raygui/styles
-LDFLAGS = -L./ext/raylib/src -lraylib -lm -lpthread -ldl -lrt -lX11
+		   -isystem./ext/tomlc17/src
+LDFLAGS = -lm
 
-# Directories
 SRC_DIR = src
 BUILD_DIR ?= build
-RAYLIB_DIR = ext/raylib/src
-TARGET = ${BUILD_DIR}/orbit_sim
 TEST_DIR = tests
-TEST_TARGET = ${BUILD_DIR}/orbit_test
 
-# Source files (exclude old mission planning files)
 CPP_SOURCES := $(wildcard $(SRC_DIR)/*.cpp)
 C_SOURCES = ext/tomlc17/src/tomlc17.c
 TEST_SOURCES := $(wildcard $(TEST_DIR)/*.cpp)
 
-# Object files
 CPP_OBJECTS = $(CPP_SOURCES:$(SRC_DIR)/%.cpp=$(BUILD_DIR)/%.o)
 C_OBJECTS = $(BUILD_DIR)/tomlc17.o
 TEST_OBJECTS := $(patsubst $(TEST_DIR)/%.cpp, $(BUILD_DIR)/%.o, $(TEST_SOURCES))
 
-# Default target (updates ctags if available)
-all: raylib $(BUILD_DIR) $(TARGET)
-	@command -v ctags >/dev/null 2>&1 && ctags -R tests/ src/ || true
+LIBRARY = $(BUILD_DIR)/liborbit.a
 
-# Build raylib
-raylib:
-	@if [ ! -f $(RAYLIB_DIR)/libraylib.a ]; then \
-		echo "Building raylib..."; \
-		cd $(RAYLIB_DIR) && $(MAKE) PLATFORM=PLATFORM_DESKTOP; \
-	fi
+all: lib test-build example
 
-# Create build directory
 $(BUILD_DIR):
 	mkdir -p $(BUILD_DIR)
 
-# Link the executable
-$(TARGET): $(C_OBJECTS) $(CPP_OBJECTS) raylib
-	$(CXX) $(C_OBJECTS) $(CPP_OBJECTS) -o $(TARGET) $(LDFLAGS)
-
-# Compile C++ source files
 $(CPP_OBJECTS): $(BUILD_DIR)/%.o : $(SRC_DIR)/%.cpp
 	$(CXX) $(CXXFLAGS) -c $< -o $@
 
-# Compile C source files
 $(C_OBJECTS): $(BUILD_DIR)/%.o : $(C_SOURCES)
 	$(CC) -Wall -Wextra -g -ggdb3 -std=c99 -I./src -I./ext/tomlc17/src -c $< -o $@
 
-# Clean build files
-clean:
-	rm -rf $(BUILD_DIR) $(TARGET) $(TEST_TARGET)
-
-# Clean everything including raylib
-clean-all: clean
-	cd $(RAYLIB_DIR) && $(MAKE) clean
-
-# Rebuild
-rebuild: clean all
+lib: $(BUILD_DIR) $(C_OBJECTS) $(CPP_OBJECTS)
+	ar rcs $(LIBRARY) $(C_OBJECTS) $(CPP_OBJECTS)
+	@echo "Built $(LIBRARY)"
 
 $(TEST_OBJECTS): $(BUILD_DIR)/%.o : $(TEST_DIR)/%.cpp
 	$(CXX) $(CXXFLAGS) -c $< -o $@
 
-# Build automated test suite
-test-build: $(BUILD_DIR) $(C_OBJECTS) $(CPP_OBJECTS) $(TEST_OBJECTS)
-	$(CXX) $(C_OBJECTS) $(TEST_OBJECTS) \
-		build/test_utilities.o \
-		build/physics.o \
-		build/orbital_mechanics.o \
-		build/simulation.o \
-		build/config_loader.o \
-		build/config_validator.o \
-		build/maneuver.o \
-		build/rendezvous.o \
-		-o $(TEST_TARGET) -lCatch2Main -lCatch2 -lm
-
-# Run automated test suite
+test-build: lib $(BUILD_DIR) $(TEST_OBJECTS)
+	$(CXX) $(TEST_OBJECTS) -o $(BUILD_DIR)/orbit_test -L$(BUILD_DIR) -lorbit -lCatch2Main -lCatch2 -lm
+
 test: test-build
-	./$(TEST_TARGET)
+	./$(BUILD_DIR)/orbit_test
+
+example: lib
+	$(MAKE) -C example all BUILD_DIR=../$(BUILD_DIR)
+
+clean:
+	rm -rf $(BUILD_DIR) $(LIBRARY)
+	$(MAKE) -C example clean
+
+clean-all: clean
+	$(MAKE) -C example clean-all
+
+rebuild: clean all
 
-.PHONY: all clean clean-all rebuild test test-build raylib ctags
+.PHONY: all lib test-build test example clean clean-all rebuild

example/Makefile

@@ -0,0 +1,42 @@
+CXX = g++
+CXXFLAGS = -Wall -Wextra -g -ggdb3 -std=c++14 \
+		   -I./src \
+		   -I../src \
+		   -isystem./ext/raylib/src \
+		   -isystem./ext/raygui/src \
+		   -isystem./ext/raygui/styles
+LDFLAGS = -L./ext/raylib/src -lraylib -lm -lpthread -ldl -lrt -lX11
+
+SRC_DIR = src
+BUILD_DIR ?= build
+RAYLIB_DIR = ext/raylib/src
+
+CPP_SOURCES := $(wildcard $(SRC_DIR)/*.cpp)
+
+CPP_OBJECTS = $(CPP_SOURCES:$(SRC_DIR)/%.cpp=$(BUILD_DIR)/%.o)
+
+TARGET = ${BUILD_DIR}/orbit_sim
+
+raylib:
+	@if [ ! -f $(RAYLIB_DIR)/libraylib.a ]; then \
+		cd $(RAYLIB_DIR) && $(MAKE) PLATFORM=PLATFORM_DESKTOP; \
+	fi
+
+$(BUILD_DIR):
+	mkdir -p $(BUILD_DIR)
+
+$(TARGET): $(CPP_OBJECTS) raylib
+	$(CXX) $(CPP_OBJECTS) -o $(TARGET) -L$(BUILD_DIR) -lorbit $(LDFLAGS)
+
+$(CPP_OBJECTS): $(BUILD_DIR)/%.o : $(SRC_DIR)/%.cpp
+	$(CXX) $(CXXFLAGS) -c $< -o $@
+
+clean:
+	rm -f $(TARGET)
+	@for f in $(CPP_SOURCES); do rm -f $(BUILD_DIR)/$$(basename $${f%.cpp}.o); done
+
+rebuild: clean all
+
+all: raylib $(BUILD_DIR) $(TARGET)
+
+.PHONY: all clean raylib rebuild

example/ext/raygui

@@ -0,0 +1 @@
+Subproject commit 3b2855842ab578a034f827c38cf8f62c042fc983

example/ext/raylib

@@ -0,0 +1 @@
+Subproject commit 72a341a37fbd9ccc1d8ec284ff20aeb5b991ad75

example/src/ui_renderer.cpp

@@ -1045,7 +1045,7 @@ void render_maneuver_dialog(SimulationState* sim, RenderState* render_state, UIS
         return;
     }
 
-    const char* tabs[] = {"Create Maneuver", "Hohmann Transfer", "Edit Maneuver"};
+    char* tabs[] = {(char*)"Create Maneuver", (char*)"Hohmann Transfer", (char*)"Edit Maneuver"};
     int tab_count = 3;
     Rectangle tab_bounds = {x + 8, y + 30, width - 16, 25};
     GuiTabBar(tab_bounds, tabs, tab_count, (int*)&ui_state->maneuver_dialog.active_tab);

ext/raygui

@@ -1 +0,0 @@
-Subproject commit 9a1c183d8539e2470635b22f92bdaefaf5218aaa

ext/raylib

@@ -1 +0,0 @@
-Subproject commit ca89934ed5af9161f781a9b35b808b765dc40f3a