Add test coverage for unicode_escape decoding in anthropic-text-editor output handling

[Copilot]

Added test case for the unicode escape decoding logic introduced in line 244 of MicroBot.py. The code handles anthropic-text-editor tool output by decoding unicode-escaped strings (\n, \t) to actual newlines and tabs.

Changes

• Test coverage: Added test_anthropic_text_editor_unicode_escape_decoding() to verify the decoding logic:

  output_json = json.loads('{"content": "Line 1\\nLine 2\\nLine 3\\tTabbed"}')
  decoded = output_json["content"].encode("utf-8").decode("unicode_escape")
  # Verifies: "Line 1\nLine 2\nLine 3\tTabbed" (actual newlines/tabs, not escaped)

• Code quality: Moved json import to module level for consistency with Python conventions

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