Tools: add ScriptingOSD autotest

Add autotest for OSD scripting functionality. The test:
- Enables scripting and OSD
- Installs the osd.lua example script
- Uploads a simple waypoint mission
- Flies the mission while the script displays waypoint info

The test gracefully skips if SFML OSD is not available (requires
SITL to be built with --enable-sfml --sitl-osd).

Author: andyp1per

Tools/autotest/arducopter.py

@@ -14683,6 +14683,76 @@ def ScriptingFlyVelocity(self):
         # Test done
         self.land_and_disarm()
 
+    def ScriptingOSD(self):
+        '''test OSD scripting with waypoint mission - requires SFML OSD'''
+        # This test requires SITL to be built with SFML support:
+        #   ./waf configure --board sitl --enable-sfml --sitl-osd
+        # Without SFML, the OSD scripting bindings return nil and scripts fail.
+
+        # Check if OSD is compiled in by looking for OSD_TYPE parameter
+        try:
+            self.get_parameter("OSD_TYPE")
+        except Exception:
+            self.progress("OSD not compiled in, skipping test")
+            return
+
+        self.context_push()
+        self.context_collect('STATUSTEXT')
+
+        # Enable scripting and OSD
+        # Note: OSD_TYPE=3 is SITL OSD which requires --enable-sfml --sitl-osd
+        self.set_parameters({
+            "SCR_ENABLE": 1,
+            "OSD_TYPE": 3,  # SITL OSD (requires SFML)
+        })
+
+        # Install the OSD example script
+        self.install_example_script_context('osd.lua')
+        self.reboot_sitl()
+
+        # Wait for script to start
+        self.delay_sim_time(3)
+
+        # Check if the script reports OSD is not available
+        # The script prints "osd not available" when no OSD backend is present
+        try:
+            self.wait_statustext("osd not available", timeout=5, check_context=True)
+            self.progress("OSD scripting not functional (SFML not enabled), skipping test")
+            self.context_pop()
+            return
+        except AutoTestTimeoutException:
+            # Good - no error message means OSD is working
+            pass
+
+        # Create a simple waypoint mission
+        # (type, north_offset_m, east_offset_m, alt_m)
+        items = [
+            (mavutil.mavlink.MAV_CMD_NAV_TAKEOFF, 0, 0, 20),
+            (mavutil.mavlink.MAV_CMD_NAV_WAYPOINT, 50, 0, 20),    # 50m North
+            (mavutil.mavlink.MAV_CMD_NAV_WAYPOINT, 50, 50, 20),   # 50m North, 50m East
+            (mavutil.mavlink.MAV_CMD_NAV_WAYPOINT, 0, 50, 20),    # 50m East
+            (mavutil.mavlink.MAV_CMD_NAV_WAYPOINT, 0, 0, 20),     # Back to start
+            (mavutil.mavlink.MAV_CMD_NAV_LAND, 0, 0, 0),
+        ]
+
+        # Set AUTO_OPTIONS to allow arming in AUTO mode
+        self.set_parameter("AUTO_OPTIONS", 3)
+
+        # Upload and start the mission
+        self.upload_simple_relhome_mission(items)
+        self.change_mode('AUTO')
+        self.wait_ready_to_arm()
+        self.arm_vehicle()
+
+        # Wait for mission to complete (land and disarm)
+        self.wait_disarmed(timeout=180)
+
+        # Verify no script errors occurred
+        # The script should have been running and displaying waypoint info
+        self.progress("OSD scripting mission test completed successfully")
+
+        self.context_pop()
+
     def RTLYaw(self):
         '''test that vehicle yaws to original heading on RTL'''
         # 0 is WP_YAW_BEHAVIOR_NONE
@@ -15794,6 +15864,7 @@ def tests2b(self):  # this block currently around 9.5mins here
             self.TestTetherStuck,
             self.ScriptingFlipMode,
             self.ScriptingFlyVelocity,
+            self.ScriptingOSD,
             self.EK3_EXT_NAV_vel_without_vert,
             self.CompassLearnCopyFromEKF,
             self.AHRSAutoTrim,