Static stylized '1' on a slate (0xFF5C6B7A) background. The numeral
references kalendae, the Latin word for 'first day of the month' that is
the etymological root of both 'Calendar' and 'Calendula'. Adaptive icon
spec: foreground vector path, monochrome variant for themed icons (API
33+), no PNG fallback needed (minSdk 29 > 26).
Visual refinement is expected during the UI design iteration; this is
the foundational shape and meaning.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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