scrypted: log attachListener early-return when no camera assigned

Silent early-return at 'if (!v.cameraId) return;' makes a brand-new
viewport with no camera selected look identical (in the console) to
one that subscribed successfully — there's no positive or negative
signal until you try to fire a camera event. After observing a fresh
viewport produce zero output on a doorbell press, switching the
early-return to a warning that says 'no camera assigned — open
Settings and pick a camera; subscription skipped' so the missing
configuration becomes self-evident.

1 files changed, 5 insertions, 2 deletions

diff --git a/scrypted/scrypted-viewport.ts b/scrypted/scrypted-viewport.ts
index 2662ff1..7d64ffd 100644
--- a/scrypted/scrypted-viewport.ts
+++ b/scrypted/scrypted-viewport.ts
@@ -655,9 +655,12 @@ class ScryptedViewportProvider extends ScryptedDeviceBase
     };
 
     private attachListener(v: Viewport) {
-        if (!v.cameraId) return;
-        const cam = systemManager.getDeviceById(v.cameraId);
         const tag = v.name || v.storage.getItem("display_name") || v.nativeId;
+        if (!v.cameraId) {
+            this.console.warn(`viewport "${tag}": no camera assigned — open Settings and pick a camera; subscription skipped`);
+            return;
+        }
+        const cam = systemManager.getDeviceById(v.cameraId);
         if (!cam) {
             this.console.warn(`viewport "${tag}": camera ${v.cameraId} not found`);
             return;