schlib_write: encode parameter records as UTF-8 (fixes crash on Ω/µ and other non-latin-1 chars in template columns like ESR(mΩ))

scripts/schlib_write.py

@@ -113,7 +113,7 @@ def _uid(name):
 def _param_record(idx, name, value):
     s=(f"|RECORD=41|IndexInSheet={idx}|OwnerPartId=1|Justification=4|FontID=2|IsHidden=T"
        f"|Text={value}|Name={name}|UniqueID={_uid(name)}")
-    payload=s.encode('latin-1')+b'\x00'
+    payload=s.encode('utf-8')+b'\x00'                 # utf-8: handles Ω, µ, °, ± in names/values
     return struct.pack('<I',len(payload))+payload
 
 
@@ -134,7 +134,7 @@ def _leading_text_records(data):
 
 
 def _rec_name(block):
-    t=block[4:-1].decode('latin-1')
+    t=block[4:-1].decode('utf-8','replace')
     return t.split('|Name=')[1].split('|')[0] if '|Name=' in t else None
 
 
@@ -142,12 +142,12 @@ def _patch_field(block, field, value):
     """Replace |field=...| inside a length-prefixed text record, re-framing its 4-byte length.
     Used to set the component's ComponentDescription in the RECORD=1 header."""
     import re
-    text = block[4:-1].decode('latin-1')
+    text = block[4:-1].decode('utf-8', 'replace')
     if f"|{field}=" in text:
         text = re.sub(rf"\|{re.escape(field)}=[^|]*", f"|{field}={value}", text, count=1)
     elif text.startswith("|RECORD="):
         text = text + f"|{field}={value}"
-    payload = text.encode('latin-1') + b'\x00'
+    payload = text.encode('utf-8') + b'\x00'
     return struct.pack('<I', len(payload)) + payload
 
 
@@ -286,7 +286,7 @@ def write_params(schlib, params_json, out, typeid=None, template=None):
     ok=True
     for e in ole.listdir(streams=True):
         if e[-1].lower()=="data":
-            t=ole.openstream(e).read().decode('latin-1','ignore')
+            t=ole.openstream(e).read().decode('utf-8','ignore')
             for nm in fields:
                 if f"|Name={nm}|" not in t and f"|Name={nm}\x00" not in t and f"Name={nm}" not in t:
                     ok=False