feat: improve airport bubble sizes

[johanohly]

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Copilot]

Pull Request Overview

This PR updates the airport bubble size calculation in the data preparation logic by adjusting the scaling factors for frequency.

• Updated MIN_FREQUENCY from 0.5 to 1
• Replaced maximum-based normalization with a min-max normalization approach for computing frequency

Files not reviewed (1)

• src/lib/components/map/AirportsArcsLayer.svelte: Language not supported

Comments suppressed due to low confidence (1)

src/lib/utils/data/data.ts:150

• [nitpick] Consider renaming 'normalised' to 'normalizedFrequency' (or 'normalized') to maintain consistency with prior naming conventions.

const normalised = (combined - rawMin) / span;