[BUG] Stopped 112ms gyro scan to fix CPU cycle

[Circuit-Overtime]

Changes Made

• apps/launcher/main.py: Added module-level _APPS_CACHE and _CATEGORIES_CACHE so list_apps() (which opens 20+ manifest.json files from flash) is only called once per roster change, not every drawer open. Added invalidate_apps_cache() hook for Store/Updates to call after install/uninstall. Added segment-timed _lap() prints inside on_enter to identify which phase is slow on real hardware.
• apps/store/main.py: Calls invalidate_apps_cache() after a successful install or uninstall so the launcher drawer reflects the new roster immediately instead of waiting for reboot.
• apps/wifi/main.py: Replaced subnet/gateway rows with Networks, Speed, and Ping rows. Added "nets" sub-page for saved-networks management (UP/DOWN to browse, A to connect + promote to priority 1, B to forget, LEFT to toggle metered). Added _run_speed_test() and _run_ping() with a _paint_busy() intermediate frame so the screen doesn't appear frozen during synchronous network calls. Updated module docstring and hint bar.

Checklist

• MicroPython compat: no f-strings with =, no pathlib, no walrus in modules that ship to flash
• No secrets committed (.env, secrets.py)
• Flashed + smoke-tested on hardware
• Tested locally:

[elixpoo]

[CHANGE LOG] 📋 Changelog updated for PR #28. View changelog