fix(temp_window): Remove non-functional *args parameter

[tony]

Summary

• Remove *args from temp_window() signature since it cannot be forwarded to Session.new_window()

Problem

Session.new_window() uses keyword-only arguments (has a * marker after window_name), which means it cannot accept positional arguments beyond window_name. However, temp_window() accepted *args and attempted to forward them, which would cause a TypeError at runtime if anyone tried to pass positional arguments.

Example that would fail before this fix:

with temp_window(session, "positional_arg") as window:
    # TypeError: new_window() takes 2 positional arguments but 3 were given

Note: temp_session() is unaffected because Server.new_session() explicitly accepts *args.

Test plan

• All 872 tests pass
• mypy passes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.58%. Comparing base (81d55fa) to head (8cb8b4d).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #619   +/-   ##
=======================================
  Coverage   46.58%   46.58%           
=======================================
  Files          22       22           
  Lines        2372     2372           
  Branches      390      390           
=======================================
  Hits         1105     1105           
  Misses       1098     1098           
  Partials      169      169           

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[tony]

Code review

No issues found. Checked for bugs and CLAUDE.md compliance.

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