chore(core): cover viewport minimum zoom branches

[cursor]

Selected task

Coverage task selected because: “1 uncovered lines, 99.54% lines and 89.28% branches, the smallest gap below the 90% threshold.”

Measurement

• viewport.ts line coverage: 99.54% → 100%
• viewport.ts branch coverage: 89.28% → 90%
• Full local CI and all applicable core checks pass.

No public API changed. This change only adds unit coverage for removing the behavior-pan attribute and requesting zoom-out at the minimum scale; adjacent uncovered branches were deliberately left alone.

  

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[github-code-quality]

Code Coverage Overview

Languages: TypeScript

TypeScript / code-coverage/vitest

The overall line coverage in commit 6fe31be in the topic/upkeep/coverag... branch remains at 99%, unchanged from commit 9f70897 in the main branch.

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_{Updated October 03, 2026 13:29 UTC}