Modular Tablets: Converting PDAs to the NtOS System (#65755)

Converts PDA functions and applications over to modular tablets and devices, namely the messaging function. HREF data code is quite honestly clunky and difficult to work with, as I've definitely experienced whilst working on this. By moving from this system over the easier to read (and frankly, easier to add to) TGUI system, you get cleaner looking and more user friendly UIs and a greater degree of standardization amongst other UIs.

Co-authored-by: Seth Scherer <supernovaa41@gmx.com>
Co-authored-by: GoldenAlpharex <58045821+GoldenAlpharex@users.noreply.github.com>
Co-authored-by: Aleksej Komarov <stylemistake@gmail.com>

code/modules/modular_computers/file_system/programs/notepad.dm

@@ -0,0 +1,29 @@
+/datum/computer_file/program/notepad
+	filename = "notepad"
+	filedesc = "Notepad"
+	category = PROGRAM_CATEGORY_MISC
+	program_icon_state = "generic"
+	extended_desc = "Jot down your work-safe thoughts and what not."
+	size = 2
+	tgui_id = "NtosNotepad"
+	program_icon = "book"
+	usage_flags = PROGRAM_TABLET
+
+/datum/computer_file/program/notepad/ui_act(action, list/params, datum/tgui/ui)
+	. = ..()
+	if(.)
+		return
+
+	switch(action)
+		if("UpdateNote")
+			var/obj/item/modular_computer/tablet/comp = computer
+			comp.note = params["newnote"]
+			return UI_UPDATE
+
+/datum/computer_file/program/notepad/ui_data(mob/user)
+	var/list/data = get_header_data()
+	var/obj/item/modular_computer/tablet/comp = computer
+
+	data["note"] = comp.note
+
+	return data