Prevent tweak store downgrades and dedupe sidebar logs

[probmetrics]

What

• Log a missing settings sidebar once per absence period.
• Treat a Store version as an update only when it is strictly newer.
• Label a locally newer tweak with the Store-approved version instead of calling the older version latest.

Why

Repeated DOM probes can flood the preload log while the settings sidebar is absent. Version inequality also lets an older Store-pinned version appear as an update and downgrade a newer local install.

Impact

The settings log stays useful, and the Store no longer offers version downgrades. Malformed versions are handled conservatively.

Checks

• npm test (144 passing)
• npm run build
• git diff --check