mod: fix clock bugs, add NTP auto-sync, show clock in all headers

- Fix SetTimeActivity immediately dismissing by changing wasReleased to
  wasPressed for all button inputs (matching other subactivities)
- Extract NTP sync into shared TimeSync utility (startNtpSync,
  waitForNtpSync, stopNtpSync) and trigger non-blocking NTP sync on
  every WiFi connection
- Move clock rendering into drawHeader (BaseTheme + LyraTheme) so it
  appears on all screens with a header, positioned symmetrically with
  the battery icon (12px margin, same Y offset, SMALL_FONT_ID)
- Add per-minute auto-refresh on home screen so clock updates without
  button press
- Add RTC time debug log on boot to verify time persistence across
  deep sleep

Co-authored-by: Cursor <cursoragent@cursor.com>

src/main.cpp

@@ -11,6 +11,7 @@
 #include <builtinFonts/all.h>
 
 #include <cstring>
+#include <ctime>
 
 #include "Battery.h"
 #include "CrossPointSettings.h"
@@ -350,6 +351,18 @@ void setup() {
   // First serial output only here to avoid timing inconsistencies for power button press duration verification
   LOG_DBG("MAIN", "Starting CrossPoint version " CROSSPOINT_VERSION);
 
+  // Log RTC time to verify persistence across deep sleep
+  {
+    time_t now = time(nullptr);
+    struct tm* t = localtime(&now);
+    if (t != nullptr && t->tm_year > 100) {
+      LOG_DBG("MAIN", "RTC time: %04d-%02d-%02d %02d:%02d:%02d", t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
+              t->tm_hour, t->tm_min, t->tm_sec);
+    } else {
+      LOG_DBG("MAIN", "RTC time not set (epoch)");
+    }
+  }
+
   setupDisplayAndFonts();
 
   exitActivity();