* **New Features**
* Added Material Design symbol fonts and LVGL font aliases for launcher, status bar, and shared UI icons.
* **Style**
* Migrated app icons across the UI to the new symbol font system.
* Updated launcher button sizing, font styling, recoloring and icon text color for consistency.
* Default text/icon font macros set for consistent sizing across the UI.
* **Documentation**
* Updated third‑party notices to include Material Design Icons links.
* **New Features**
* Time and delay utilities added (ticks, ms, µs); SD card now uses an expansion-header CS pin; HTTP downloads warn when run on the GUI task and yield to avoid blocking.
* **Bug Fixes / Reliability**
* Many hard-crash paths converted to guarded checks to reduce abrupt termination and improve stability.
* **Tests**
* Unit tests added to validate time and delay accuracy.
* **Chores**
* License header and build/macro updates.
Ken Van Hoeylandt