Wrap image loop session.upsert() in try/except for reconnect resilience

Prevents coroutine death when WebSocket session drops (headset
removed/sleep). Coroutine stays alive and resumes sending when
a new session connects.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/televuer/televuer.py

@@ -346,6 +346,7 @@ class TeleVuer:
                 to="bgChildren",
             )
         while True:
+            try:
                 session.upsert(
                     [
                         ImageBackground(
@@ -353,9 +354,6 @@ class TeleVuer:
                             aspect=self.aspect_ratio,
                             height=1,
                             distanceToCamera=1,
-                        # The underlying rendering engine supported a layer binary bitmask for both objects and the camera. 
-                        # Below we set the two image planes, left and right, to layers=1 and layers=2. 
-                        # Note that these two masks are associated with left eye’s camera and the right eye’s camera.
                             layers=1,
                             format="jpeg",
                             quality=50,
@@ -376,7 +374,8 @@ class TeleVuer:
                     ],
                     to="bgChildren",
                 )
-            # 'jpeg' encoding should give you about 30fps with a 16ms wait in-between.
+            except Exception:
+                pass  # Session dropped; coroutine stays alive for reconnect
             await asyncio.sleep(1.0 / self.display_fps)
 
     async def main_image_monocular_zmq(self, session):
@@ -402,6 +401,7 @@ class TeleVuer:
             )
 
         while True:
+            try:
                 session.upsert(
                     [
                         ImageBackground(
@@ -417,6 +417,8 @@ class TeleVuer:
                     ],
                     to="bgChildren",
                 )
+            except Exception:
+                pass  # Session dropped; coroutine stays alive for reconnect
             await asyncio.sleep(1.0 / self.display_fps)
 
     async def main_image_binocular_webrtc(self, session):
@@ -515,6 +517,7 @@ class TeleVuer:
                 to="bgChildren",
             )
         while True:
+            try:
                 session.upsert(
                     [
                         ImageBackground(
@@ -522,9 +525,6 @@ class TeleVuer:
                             aspect=self.aspect_ratio,
                             height=0.75,
                             distanceToCamera=2,
-                        # The underlying rendering engine supported a layer binary bitmask for both objects and the camera. 
-                        # Below we set the two image planes, left and right, to layers=1 and layers=2. 
-                        # Note that these two masks are associated with left eye’s camera and the right eye’s camera.
                             layers=1,
                             format="jpeg",
                             quality=50,
@@ -545,7 +545,8 @@ class TeleVuer:
                     ],
                     to="bgChildren",
                 )
-            # 'jpeg' encoding should give you about 30fps with a 16ms wait in-between.
+            except Exception:
+                pass
             await asyncio.sleep(1.0 / self.display_fps)
 
     async def main_image_monocular_zmq_ego(self, session):
@@ -571,6 +572,7 @@ class TeleVuer:
             )
 
         while True:
+            try:
                 session.upsert(
                     [
                         ImageBackground(
@@ -586,6 +588,8 @@ class TeleVuer:
                     ],
                     to="bgChildren",
                 )
+            except Exception:
+                pass
             await asyncio.sleep(1.0 / self.display_fps)
 
     async def main_image_binocular_webrtc_ego(self, session):