clear first_fix_acquired on gps off, increase timeout to 120 sec

zephcore/Kconfig

@@ -445,11 +445,15 @@ config ZEPHCORE_GPS_POLL_INTERVAL_SEC
 
 config ZEPHCORE_GPS_FIX_TIMEOUT_SEC
 	int "GPS fix acquisition timeout in seconds"
-	default 30
+	default 120
 	range 10 300
 	help
 	  Maximum time to wait for GPS fix before giving up.
 	  GPS will be powered off after this timeout.
+	  Default 120s — 30s was too aggressive for Air530Z / MAX-7Q warm
+	  starts in marginal sky conditions; the acquire loop would time out
+	  before the 3-consecutive-good-fix gate could promote. Only applies
+	  to wake cycles after the first successful fix since enable.
 
 endmenu
 

zephcore/adapters/gps/ZephyrGPSManager.cpp

@@ -85,7 +85,7 @@ enum gps_state {
 
 static enum gps_state gps_current_state = GPS_STATE_OFF;
 static uint8_t consecutive_good_fixes = 0;
-static bool first_fix_acquired = false;  /* True after first successful fix since enable */
+static bool first_fix_acquired = false;  /* True after first 3-good-fix cycle since enable. Cleared on gps_enable(false) and at boot. */
 static bool gps_time_synced = false;     /* True after GPS syncs RTC. Starts false at boot (RTC reset),
                                           * set true after 3 good fixes, cleared when GPS disabled. */
 static int64_t last_fix_uptime_ms = 0;  /* k_uptime when last validated fix was acquired */
@@ -1297,6 +1297,12 @@ void gps_enable(bool enable)
 		gps_current_state = GPS_STATE_OFF;
 		consecutive_good_fixes = 0;
 
+		/* Clear first-fix flag so the next enable gets the "no timeout"
+		 * grace period again — in marginal signal, a 30–120s timeout may
+		 * never be enough, and the user explicitly toggled GPS expecting
+		 * it to try hard for a fix. */
+		first_fix_acquired = false;
+
 		/* Clear time sync flag - time will drift, allow phone sync again */
 		gps_time_synced = false;
 	}