feat: update chat, settings, prompts and system info modules

backend/internal/handlers/sysinfo_windows.go

@@ -0,0 +1,68 @@
+//go:build windows
+
+package handlers
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+type memoryStatusEx struct {
+	dwLength                uint32
+	dwMemoryLoad            uint32
+	ullTotalPhys            uint64
+	ullAvailPhys            uint64
+	ullTotalPageFile        uint64
+	ullAvailPageFile        uint64
+	ullTotalVirtual         uint64
+	ullAvailVirtual         uint64
+	ullAvailExtendedVirtual uint64
+}
+
+func getSysMemMb() (total, free int64) {
+	kernel32 := syscall.NewLazyDLL("kernel32.dll")
+	proc := kernel32.NewProc("GlobalMemoryStatusEx")
+	var ms memoryStatusEx
+	ms.dwLength = uint32(unsafe.Sizeof(ms))
+	ret, _, _ := proc.Call(uintptr(unsafe.Pointer(&ms)))
+	if ret == 0 {
+		return 0, 0
+	}
+	return int64(ms.ullTotalPhys / 1024 / 1024), int64(ms.ullAvailPhys / 1024 / 1024)
+}
+
+func getOSRelease() string {
+	k, err := syscall.UTF16PtrFromString(`SOFTWARE\Microsoft\Windows NT\CurrentVersion`)
+	if err != nil {
+		return "Windows"
+	}
+	var handle syscall.Handle
+	if err := syscall.RegOpenKeyEx(syscall.HKEY_LOCAL_MACHINE, k, 0, syscall.KEY_READ, &handle); err != nil {
+		return "Windows"
+	}
+	defer syscall.RegCloseKey(handle)
+
+	readStr := func(name string) string {
+		namePtr, _ := syscall.UTF16PtrFromString(name)
+		var typ uint32
+		var buf [256]uint16
+		n := uint32(len(buf) * 2)
+		if err := syscall.RegQueryValueEx(handle, namePtr, nil, &typ, (*byte)(unsafe.Pointer(&buf[0])), &n); err != nil {
+			return ""
+		}
+		return syscall.UTF16ToString(buf[:])
+	}
+
+	productName := readStr("ProductName")
+	displayVersion := readStr("DisplayVersion")
+	if displayVersion == "" {
+		displayVersion = readStr("ReleaseId")
+	}
+	if productName == "" {
+		return "Windows"
+	}
+	if displayVersion != "" {
+		return productName + " " + displayVersion
+	}
+	return productName
+}