app: implement export container as tarball option

Merge branch 'ponces-main-ponces'

feat: fix colors in the active container card, implement background OS info refresh with pull-to-refresh support in RunningContainerCard

app: enforce JetBrains Mono across all terminal and monospace UI

container.c: reorder container startup sequence and move banner print before rootfs resolution

ui: complete localization and resource pruning

Translations update from Hosted Weblate (#86)

app: modernized the rest of the ui, including systemd services menu, dialogs, etc

ui: remastered setup flow with premium feature-showcase aesthetic

app: fix layout shifts and color glitches in Save Configuration button

seccomp: mitigate CVE-2026-31431 (Copy Fail)