Initial commit

src/screens/home_screen.h

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+#pragma once
+
+// Renders the home screen: current weather, soft rain warning, and the
+// next 2 calendar events. Fetches weather + calendar data if the 10 minute
+// refresh interval has elapsed, or if forced (e.g. manual retry).
+void renderHomeScreen(bool forceRefresh = false);
+
+// Call regularly from loop() to check if a refresh is due.
+void updateHomeScreen();