test: buoy v0.3.19 — category separation, rem/px matching, token suggestions

[dylantarre]

Test: Buoy v0.3.19

Testing fixes from v0.3.19:

• Category separation: radius→border tokens, font-size→typography only, spacing→spacing only
• Rem/px confidence: raw token values like 1rem now match 16px signals
• Token suggestions in drift output: show drift now includes token replacement suggestions
• No cross-contamination: spacing tokens won't match radius/typography drift and vice versa

Triggered by: test/buoy-0.3.19 branch

[ahoybuoy]

🛟 Buoy Design Review

✅ No new design drift detected in this PR

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Baseline: 34 pre-existing issues

These issues existed before this PR and are not shown above.

Run buoy drift baseline to re-scan and update the baseline.

_{reply @ahoybuoy for help}