style: apply ruff lint fixes and formatting

scripts/build_icons.py

@@ -10,13 +10,11 @@ Requirements:
     pip install pillow          # for .ico
     iconutil                   # built into macOS; for .icns
 """
+
 from __future__ import annotations
 
-import os
-import platform
 import shutil
 import subprocess
-import sys
 import tempfile
 from pathlib import Path
 
@@ -32,7 +30,8 @@ def build_ico():
         print("Pillow not installed — skipping .ico generation (pip install pillow)")
         return
 
-    import io, struct
+    import io
+    import struct
 
     sizes = [16, 24, 32, 48, 64, 128, 256]
     images: list[tuple[int, object]] = []
@@ -65,7 +64,10 @@ def build_ico():
             32,  # biBitCount
             0,  # biCompression (BI_RGB)
             0,  # biSizeImage (0 ok for BI_RGB)
-            0, 0, 0, 0,
+            0,
+            0,
+            0,
+            0,
         )
         pix = img.load()
         rows = bytearray()