Floating Labels DOM Structure Tests

Minimal fixture for validating DOM structure of all floating label variations.

Test 1: Basic Floating Label

Expected: .input-group wraps .form-floating, buttons outside .form-floating

Test 2: Advanced Floating Label (Input Group)

Expected: Existing .input-group enhanced, .form-floating between prefix/postfix

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Test 3: Basic Floating Label + Vertical Buttons

Expected: .form-floating first, then vertical wrapper

Test 4: Advanced Floating Label + Vertical Buttons

Expected: prefix, .form-floating, vertical wrapper, postfix

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