[xiehuanyi]

BaseDict.update() rejects empty calls and entry keywords such as update(name="Alice"), although its dictionary base class supports these forms.

Make the source optional, use positional-only self and other parameters, and forward entry keywords to the backing dictionary or native storage. Preserve keyword precedence, nested BaseDict normalization, and freeze checks. Five tests cover both storage modes and native-dict controls for self/other keys.

Fourteen new subcases fail before this change. All 968 unittest cases, package mypy checks, Ruff lint and formatting pass.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.69%. Comparing base (c4c8a58) to head (cbf17da).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #633   +/-   ##
=======================================
  Coverage   98.69%   98.69%           
=======================================
  Files          65       65           
  Lines        2446     2449    +3     
=======================================
+ Hits         2414     2417    +3     
  Misses         32       32           

Flag	Coverage Δ
unittests	98.69% <100.00%> (+<0.01%)	⬆️

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