feat: Integrate LVGL v8.3 desktop GUI, PS/2 mouse driver, live system monitor, and make gui target

Makefile

@@ -36,12 +36,14 @@ INIT_SERVER  := $(BUILD_DIR)/init_server.elf
 UART_DRIVER  := $(BUILD_DIR)/uart_driver.elf
 SH_SERVER    := $(BUILD_DIR)/sh.elf
 PROCMGR      := $(BUILD_DIR)/procmgr.elf
+GUI_SERVER   := $(BUILD_DIR)/gui_server.elf
+LVGL_LIB     := $(BUILD_DIR)/liblvgl.a
 DISK_IMG     := $(BUILD_DIR)/opencoreC.img
 
 LIBC_OBJS    := $(BUILD_DIR)/string.o $(BUILD_DIR)/syscalls.o $(BUILD_DIR)/stdlib.o
 NET_OBJS     := $(BUILD_DIR)/net.o $(BUILD_DIR)/rtl8139.o $(BUILD_DIR)/pci.o
 
-.PHONY: all kernel libc hal servers image run clean help limine-setup
+.PHONY: all kernel libc hal servers lvgl image run gui qemu clean help limine-setup
 
 all: kernel libc hal servers
 	@mkdir -p $(BUILD_DIR)
@@ -49,8 +51,8 @@ all: kernel libc hal servers
 	@echo "======================================================="
 	@echo " [SUCCESS] opencoreC Build Complete!"
 	@echo " Kernel:   $(KERNEL_ELF)"
-	@echo " Servers:  $(INIT_SERVER), $(UART_DRIVER), $(SH_SERVER), $(PROCMGR)"
-	@echo " Run:      make image && make run"
+	@echo " Servers:  $(INIT_SERVER), $(UART_DRIVER), $(SH_SERVER), $(PROCMGR), $(GUI_SERVER)"
+	@echo " Run:      make run (Serial CLI) or make gui (LVGL Desktop Window)"
 	@echo "======================================================="
 
 kernel:
@@ -75,7 +77,14 @@ hal: libc
 	@$(CC) $(CFLAGS) -I$(HAL_DIR)/include -c $(HAL_DIR)/src/fb.c -o $(BUILD_DIR)/fb.o
 	@$(CC) $(CFLAGS) -I$(HAL_DIR)/include -c $(HAL_DIR)/src/rtl8139.c -o $(BUILD_DIR)/rtl8139.o
 
-servers: libc hal
+lvgl: $(LVGL_LIB)
+
+$(LVGL_LIB):
+	@mkdir -p $(BUILD_DIR)/lvgl
+	@echo "[CC] Compiling LVGL v8.3 Graphics Library..."
+	@python3 scripts/build_lvgl.py $(CC) "$(CFLAGS)" $(BUILD_DIR)
+
+servers: libc hal $(LVGL_LIB)
 	@mkdir -p $(BUILD_DIR)
 	@echo "[CXX/CC] Linking Ring 3 User-space Servers..."
 	@# C++ LibIPC
@@ -96,6 +105,10 @@ servers: libc hal
 	@$(CXX) $(CXXFLAGS) -c $(SERVERS_DIR)/procmgr/main.cpp -o $(BUILD_DIR)/procmgr_main.o
 	@$(LD) -T $(CONFIG_DIR)/user.ld -nostdlib -static -o $(PROCMGR) \
 		$(BUILD_DIR)/procmgr_main.o $(BUILD_DIR)/ipc.o $(LIBC_OBJS)
+	@# Desktop GUI Server (LVGL v8.3)
+	@$(CXX) $(CXXFLAGS) -Ilib/lvgl -c $(SERVERS_DIR)/gui_server/main.cpp -o $(BUILD_DIR)/gui_main.o
+	@$(LD) -T $(CONFIG_DIR)/user.ld -nostdlib -static -o $(GUI_SERVER) \
+		$(BUILD_DIR)/gui_main.o $(BUILD_DIR)/ipc.o $(LVGL_LIB) $(LIBC_OBJS)
 
 # Download and build the Limine bootloader host tool
 limine-setup:
@@ -119,6 +132,7 @@ image: all limine-setup
 	@mcopy -i $(DISK_IMG)@@1M $(UART_DRIVER)  ::/boot/
 	@mcopy -i $(DISK_IMG)@@1M $(SH_SERVER)    ::/boot/
 	@mcopy -i $(DISK_IMG)@@1M $(PROCMGR)      ::/boot/
+	@mcopy -i $(DISK_IMG)@@1M $(GUI_SERVER)   ::/boot/
 	@# Bootloader config
 	@mcopy -i $(DISK_IMG)@@1M limine.conf ::/
 	@mcopy -i $(DISK_IMG)@@1M limine.cfg  ::/
@@ -132,7 +146,22 @@ image: all limine-setup
 	@$(LIMINE_DIR)/limine bios-install $(DISK_IMG) 2>&1 | grep -v "^Physical\|^Installing\|^Stage\|^Reminder"
 	@echo "[IMAGE] Done: $(DISK_IMG) (BIOS + UEFI bootable)"
 
-# Launch QEMU with serial terminal, VGA framebuffer, and RTL8139 network card
+# Launch QEMU with Desktop GUI Window (LVGL, Framebuffer, PS/2 Mouse & Keyboard)
+gui: image
+	@echo "[QEMU] Launching opencoreC Desktop GUI (LVGL, Framebuffer, PS/2 Mouse)..."
+	@echo "[QEMU] Click inside window to grab mouse. Press Ctrl+Alt+G to release mouse."
+	$(QEMU) \
+		-M q35 \
+		-smp 4 \
+		-m 512M \
+		-vga std \
+		-netdev user,id=net0 \
+		-device rtl8139,netdev=net0 \
+		-serial mon:stdio \
+		-no-reboot \
+		-drive file=$(DISK_IMG),format=raw
+
+# Launch QEMU with serial terminal (Headless CLI mode)
 run: image
 	@echo "[QEMU] Launching opencoreC (SMP 4 cores, Serial terminal, Framebuffer, RTL8139 Net)..."
 	@echo "[QEMU] Type 'help' for commands. Ctrl+A X to exit QEMU."
@@ -167,8 +196,9 @@ help:
 	@echo "Targets:"
 	@echo "  make all          - Build kernel, HAL, libc, and all user servers"
 	@echo "  make image        - Create bootable disk image (build/opencoreC.img)"
-	@echo "  make run          - Build image and launch in QEMU (interactive serial)"
-	@echo "  make qemu         - Quick relaunch without rebuild"
+	@echo "  make gui          - Launch QEMU with Desktop GUI Window (LVGL, Framebuffer, Mouse)"
+	@echo "  make run          - Build image and launch in QEMU (interactive serial CLI)"
+	@echo "  make qemu         - Quick relaunch without rebuild (CLI)"
 	@echo "  make limine-setup - Download/build Limine bootloader"
 	@echo "  make clean        - Remove all build artifacts"
 	@echo ""