refactor(msi): pass the app name to the printer custom actions

preprocess.py rewrote the CustomActions sources per customer so the printer
carried the app name, which meant the dll was recompiled for every custom
client and, worse, left the app name baked into a compiled binary.

Pass it through CustomActionData instead. Only the printer and its port ever
varied: the INF path and the driver name ship under their stock names and
preprocess.py already forced the driver name back to RustDesk, so a single
build of the dll now serves every custom client.

Both actions treat the name as optional and fall back to the stock name, so a
package built before this still installs and uninstalls its printer.

This also unblocks patching a prebuilt msi template, which cannot work while a
compiled dll contains the app name: replacing a string inside a PE would shift
everything after it.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Q7fBdTwziR5BHTkSz7Tzcm

res/msi/preprocess.py

@@ -10,7 +10,6 @@ import subprocess
 import re
 import platform
 from pathlib import Path
-from itertools import chain
 import shutil
 
 g_indent_unit = "\t"
@@ -189,18 +188,6 @@ def replace_app_name_in_langs(app_name):
         with open(file_path, "w", encoding="utf-8") as f:
             f.writelines(lines)
 
-def replace_app_name_in_custom_actions(app_name):
-    custion_actions_dir = Path(sys.argv[0]).parent.joinpath("CustomActions")
-    for file_path in chain(custion_actions_dir.glob("*.cpp"), custion_actions_dir.glob("*.h")):
-        with open(file_path, "r", encoding="utf-8") as f:
-            lines = f.readlines()
-        for i, line in enumerate(lines):
-            line = re.sub(r"\bRustDesk\b", app_name, line)
-            line = line.replace(f"{app_name} v4 Printer Driver", "RustDesk v4 Printer Driver")
-            lines[i] = line
-        with open(file_path, "w", encoding="utf-8") as f:
-            f.writelines(lines)
-
 def gen_upgrade_info():
     def func(lines, index_start):
         indent = g_indent_unit * 3
@@ -557,4 +544,3 @@ if __name__ == "__main__":
         sys.exit(-1)
 
     replace_app_name_in_langs(args.app_name)
-    replace_app_name_in_custom_actions(args.app_name)