fix(windows): include patch version in RC FILEVERSION field

The Windows RC FILEVERSION requires all four numeric fields; omitting the
patch component left it as an empty string, which breaks NSIS's
`!getdllversion` macro used to derive the installer filename.

Author: nullmastermind

deploy/windows/version.rc.in

@@ -3,8 +3,8 @@
 IDI_APP_ICON ICON "NotepadAI.ico"
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION @PROJECT_VERSION_MAJOR@,@PROJECT_VERSION_MINOR@,0,0
- PRODUCTVERSION @PROJECT_VERSION_MAJOR@,@PROJECT_VERSION_MINOR@,0,0
+ FILEVERSION @PROJECT_VERSION_MAJOR@,@PROJECT_VERSION_MINOR@,@PROJECT_VERSION_PATCH_OR_ZERO@,0
+ PRODUCTVERSION @PROJECT_VERSION_MAJOR@,@PROJECT_VERSION_MINOR@,@PROJECT_VERSION_PATCH_OR_ZERO@,0
  FILEFLAGSMASK 0x3fL
  FILEFLAGS 0x0L
  FILEOS 0x4L

src/CMakeLists.txt

@@ -266,6 +266,13 @@ target_include_directories(NotepadAI
 )
 
 if(WIN32)
+	# project() leaves PROJECT_VERSION_PATCH empty when VERSION has only major.minor;
+	# the Windows RC FILEVERSION field requires a numeric value, and NSIS reads this
+	# back via !getdllversion to derive the installer filename, so default to 0.
+	set(PROJECT_VERSION_PATCH_OR_ZERO "${PROJECT_VERSION_PATCH}")
+	if(NOT PROJECT_VERSION_PATCH_OR_ZERO)
+		set(PROJECT_VERSION_PATCH_OR_ZERO 0)
+	endif()
 	configure_file(
 		"${CMAKE_SOURCE_DIR}/deploy/windows/version.rc.in"
 		"${CMAKE_BINARY_DIR}/version.rc"