Rewrite non-empty use-cases in icon metadata to follow
.github/instructions/metadata.instructions.md: start with a capitalized
present participle, no trailing periods, roughly 4-12 words, no first
person, and variant-specific wording instead of copied lines.
Claude-Session: https://claude.ai/code/session_011ftUgp98e8VLgymjSb9qbQ
Co-authored-by: Claude <noreply@anthropic.com>