Concurrent dashboard work added runtime exports that hardcoded module
mocks did not expose, so any suite rendering the affected component threw
"No <export> is defined on the mock". Adds the missing `../api` exports
(system-info probe, update install/restart, cloudflared, provider key and
login helpers, git remotes/branches) and the `isTabletTouchViewport`
viewport helper across the 26 suites that mock those modules.
Verified: all 26 files pass (1012 tests).
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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