Five-level risk matrix, reports, FAQ, and folder homepage

Adds the approved five-level, explainable Risk Assessment matrix
Keeps inaccurate or unavailable GPS outside the risk score and asks separately before saving
Adds BVLOS authorization and uninvolved-person choices
Adds a four-language Risk Assessment FAQ
Redesigns Logbook entries with report, OSM map, print view, and reversible flight status
Confirms every flight-status change before applying it
Prevents occasional horizontal scrolling on narrow iPhones
Implements the approved layered-folder homepage design

Changelog