feat: standardize device type for Sound Level Meters (SLM)

- Updated all instances of device_type from "sound_level_meter" to "slm" across the codebase.
- Enhanced documentation to reflect the new device type standardization.
- Added migration script to convert legacy device types in the database.
- Updated relevant API endpoints, models, and frontend templates to use the new device type.
- Ensured backward compatibility by deprecating the old device type without data loss.

backend/routers/project_locations.py

@@ -273,7 +273,7 @@ async def assign_unit_to_location(
         raise HTTPException(status_code=404, detail="Unit not found")
 
     # Check device type matches location type
-    expected_device_type = "sound_level_meter" if location.location_type == "sound" else "seismograph"
+    expected_device_type = "slm" if location.location_type == "sound" else "seismograph"
     if unit.device_type != expected_device_type:
         raise HTTPException(
             status_code=400,
@@ -375,7 +375,7 @@ async def get_available_units(
     Filters by device type matching the location type.
     """
     # Determine required device type
-    required_device_type = "sound_level_meter" if location_type == "sound" else "seismograph"
+    required_device_type = "slm" if location_type == "sound" else "seismograph"
 
     # Get all units of the required type that are deployed and not retired
     all_units = db.query(RosterUnit).filter(
@@ -397,7 +397,7 @@ async def get_available_units(
             "id": unit.id,
             "device_type": unit.device_type,
             "location": unit.address or unit.location,
-            "model": unit.slm_model if unit.device_type == "sound_level_meter" else unit.unit_type,
+            "model": unit.slm_model if unit.device_type == "slm" else unit.unit_type,
         }
         for unit in all_units
         if unit.id not in assigned_unit_ids

backend/routers/projects.py

@@ -549,7 +549,7 @@ async def get_ftp_browser(
         location = db.query(MonitoringLocation).filter_by(id=assignment.location_id).first()
 
         # Only include SLM units
-        if unit and unit.device_type == "sound_level_meter":
+        if unit and unit.device_type == "slm":
             units_data.append({
                 "assignment": assignment,
                 "unit": unit,

backend/routers/roster_edit.py

@@ -223,7 +223,7 @@ async def add_roster_unit(
     db.commit()
 
     # If sound level meter, sync config to SLMM cache
-    if device_type == "sound_level_meter":
+    if device_type == "slm":
         logger.info(f"Syncing SLM {id} config to SLMM cache...")
         result = await sync_slm_to_slmm_cache(
             unit_id=id,

backend/routers/roster_rename.py

@@ -106,7 +106,7 @@ async def rename_unit(
         db.commit()
 
         # If sound level meter, sync updated config to SLMM cache
-        if device_type == "sound_level_meter":
+        if device_type == "slm":
             logger.info(f"Syncing renamed SLM {new_id} (was {old_id}) config to SLMM cache...")
             result = await sync_slm_to_slmm_cache(
                 unit_id=new_id,

backend/routers/scheduler.py

@@ -131,7 +131,7 @@ async def create_scheduled_action(
         raise HTTPException(status_code=404, detail="Location not found")
 
     # Determine device type from location
-    device_type = "sound_level_meter" if location.location_type == "sound" else "seismograph"
+    device_type = "slm" if location.location_type == "sound" else "seismograph"
 
     # Get unit_id (optional - can be determined from assignment at execution time)
     unit_id = form_data.get("unit_id")
@@ -188,7 +188,7 @@ async def schedule_recording_session(
     if not location:
         raise HTTPException(status_code=404, detail="Location not found")
 
-    device_type = "sound_level_meter" if location.location_type == "sound" else "seismograph"
+    device_type = "slm" if location.location_type == "sound" else "seismograph"
     unit_id = form_data.get("unit_id")
 
     start_time = datetime.fromisoformat(form_data.get("start_time"))

backend/routers/slm_dashboard.py

@@ -35,7 +35,7 @@ async def get_slm_stats(request: Request, db: Session = Depends(get_db)):
     Returns HTML partial with stat cards.
     """
     # Query all SLMs
-    all_slms = db.query(RosterUnit).filter_by(device_type="sound_level_meter").all()
+    all_slms = db.query(RosterUnit).filter_by(device_type="slm").all()
 
     # Count deployed vs benched
     deployed_count = sum(1 for slm in all_slms if slm.deployed and not slm.retired)
@@ -69,7 +69,7 @@ async def get_slm_units(
     Get list of SLM units for the sidebar.
     Returns HTML partial with unit cards.
     """
-    query = db.query(RosterUnit).filter_by(device_type="sound_level_meter")
+    query = db.query(RosterUnit).filter_by(device_type="slm")
 
     # Filter by project if provided
     if project:
@@ -129,7 +129,7 @@ async def get_live_view(request: Request, unit_id: str, db: Session = Depends(ge
     Returns HTML partial with live metrics and chart.
     """
     # Get unit from database
-    unit = db.query(RosterUnit).filter_by(id=unit_id, device_type="sound_level_meter").first()
+    unit = db.query(RosterUnit).filter_by(id=unit_id, device_type="slm").first()
 
     if not unit:
         return templates.TemplateResponse("partials/slm_live_view_error.html", {
@@ -242,7 +242,7 @@ async def get_slm_config(request: Request, unit_id: str, db: Session = Depends(g
     Get configuration form for a specific SLM unit.
     Returns HTML partial with configuration form.
     """
-    unit = db.query(RosterUnit).filter_by(id=unit_id, device_type="sound_level_meter").first()
+    unit = db.query(RosterUnit).filter_by(id=unit_id, device_type="slm").first()
 
     if not unit:
         return HTMLResponse(
@@ -262,7 +262,7 @@ async def save_slm_config(request: Request, unit_id: str, db: Session = Depends(
     Save SLM configuration.
     Updates unit parameters in the database.
     """
-    unit = db.query(RosterUnit).filter_by(id=unit_id, device_type="sound_level_meter").first()
+    unit = db.query(RosterUnit).filter_by(id=unit_id, device_type="slm").first()
 
     if not unit:
         return {"status": "error", "detail": f"Unit {unit_id} not found"}

backend/routers/slm_ui.py

@@ -30,7 +30,7 @@ async def slm_detail_page(request: Request, unit_id: str, db: Session = Depends(
 
     # Get roster unit
     unit = db.query(RosterUnit).filter_by(id=unit_id).first()
-    if not unit or unit.device_type != "sound_level_meter":
+    if not unit or unit.device_type != "slm":
         raise HTTPException(status_code=404, detail="Sound level meter not found")
 
     return templates.TemplateResponse("slm_detail.html", {
@@ -46,7 +46,7 @@ async def get_slm_summary(unit_id: str, db: Session = Depends(get_db)):
 
     # Get roster unit
     unit = db.query(RosterUnit).filter_by(id=unit_id).first()
-    if not unit or unit.device_type != "sound_level_meter":
+    if not unit or unit.device_type != "slm":
         raise HTTPException(status_code=404, detail="Sound level meter not found")
 
     # Try to get live status from SLMM
@@ -61,7 +61,7 @@ async def get_slm_summary(unit_id: str, db: Session = Depends(get_db)):
 
     return {
         "unit_id": unit_id,
-        "device_type": "sound_level_meter",
+        "device_type": "slm",
         "deployed": unit.deployed,
         "model": unit.slm_model or "NL-43",
         "location": unit.address or unit.location,
@@ -89,7 +89,7 @@ async def slm_controls_partial(request: Request, unit_id: str, db: Session = Dep
     """Render SLM control panel partial."""
 
     unit = db.query(RosterUnit).filter_by(id=unit_id).first()
-    if not unit or unit.device_type != "sound_level_meter":
+    if not unit or unit.device_type != "slm":
         raise HTTPException(status_code=404, detail="Sound level meter not found")
 
     # Get current status from SLMM