Add: pair_devices.html template for device pairing interface

Fix:
- Polling intervals for SLMM.
-modem view now list
- device pairing much improved.
-various other tweaks through out UI.

backend/services/slmm_sync.py

@@ -36,6 +36,10 @@ async def sync_slm_to_slmm(unit: RosterUnit) -> bool:
         logger.warning(f"SLM {unit.id} has no host configured, skipping SLMM sync")
         return False
 
+    # Disable polling if unit is benched (deployed=False) or retired
+    # Only actively deployed units should be polled
+    should_poll = unit.deployed and not unit.retired
+
     try:
         async with httpx.AsyncClient(timeout=5.0) as client:
             response = await client.put(
@@ -47,8 +51,8 @@ async def sync_slm_to_slmm(unit: RosterUnit) -> bool:
                     "ftp_enabled": True,
                     "ftp_username": "USER",  # Default NL43 credentials
                     "ftp_password": "0000",
-                    "poll_enabled": not unit.retired,  # Disable polling for retired units
-                    "poll_interval_seconds": 60,  # Default interval
+                    "poll_enabled": should_poll,  # Disable polling for benched or retired units
+                    "poll_interval_seconds": 3600,  # Default to 1 hour polling
                 }
             )