Double-press: fall back to first channel with position enabled when primary precision == 0 (#11005)

* Double-press: fall back to first channel with position enabled when primary precision == 0
* Add missing include
* Fix trunk fmt
* Enhance logging for fallback nodeinfo sending
---------
Co-authored-by: Thomas Göttgens <tgoettgens@gmail.com>

src/mesh/MeshService.cpp

@@ -63,6 +63,7 @@ Allocator<meshtastic_ClientNotification> &clientNotificationPool = staticClientN
 
 Allocator<meshtastic_QueueStatus> &queueStatusPool = staticQueueStatusPool;
 
+#include "PositionPrecision.h"
 #include "Router.h"
 
 MeshService::MeshService()
@@ -348,8 +349,31 @@ bool MeshService::trySendPosition(NodeNum dest, bool wantReplies)
                 LOG_DEBUG("Skip position ping; no fresh position since boot");
                 return false;
             }
-            LOG_INFO("Send position ping to 0x%08x, wantReplies=%d, channel=%d", dest, wantReplies, node->channel);
+            // Prefer the node's current channel, but fall back to the first channel with
-            positionModule->sendOurPosition(dest, wantReplies, node->channel);
+            // position enabled (matching PositionModule::sendOurPosition() behavior).
+            uint8_t sendChan = node->channel;
+            if (getPositionPrecisionForChannel(sendChan) == 0) {
+                bool found = false;
+                for (uint8_t ch = 0; ch < 8; ++ch) {
+                    if (getPositionPrecisionForChannel(ch) != 0) {
+                        sendChan = ch;
+                        found = true;
+                        break;
+                    }
+                }
+                if (!found) {
+                    // No channel with position enabled: fall back to sending nodeinfo, as before.
+                    if (nodeInfoModule) {
+                        LOG_INFO(
+                            "No channel with position enabled; sending nodeinfo instead to 0x%08x, wantReplies=%d, channel=%d",
+                            dest, wantReplies, node->channel);
+                        nodeInfoModule->sendOurNodeInfo(dest, wantReplies, node->channel);
+                    }
+                    return false;
+                }
+            }
+            LOG_INFO("Send position ping to 0x%08x, wantReplies=%d, channel=%d", dest, wantReplies, sendChan);
+            positionModule->sendOurPosition(dest, wantReplies, sendChan);
             return true;
         }
     } else {