Fix live wiresheet config/runtime slot alignment and cap float display to 2 decimals

Slots with no flags (sensor, controlSignal, out_*) were not skipped
during config property reads, consuming bytes that the device never
sent and misaligning every subsequent config value (setpoint,
proportionalBand, etc.) into tiny denormalized floats like 2.36875e-41.

Changed the filter in _apply_props from "skip if runtime" to "skip if
not config" so only explicitly config-flagged slots are read from config
messages. Also switched iter("slot") to findall("slot") in the slot
registry builder to avoid picking up nested descendants.

Float display now defaults to 2 decimal places everywhere (wiresheet
and properties panel), honouring the precision facet when one exists.

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

device_session.py

@@ -13,12 +13,22 @@ import schema
 from sox import SoxClient, SoxComponent, TREE, CONFIG, RUNTIME, LINKS, ALL
 
 
-def _fmt_float(val):
-    """Format a 32-bit float for display: 6 significant digits, always with a decimal point."""
-    s = f"{val:.6g}"
-    if "." not in s and "e" not in s and "E" not in s:
-        s += ".0"
-    return s
+def _fmt_float(val, precision=2):
+    """Format a float for display with *precision* decimal places (default 2)."""
+    return f"{val:.{precision}f}"
+
+
+def _slot_precision(type_name, slot_name):
+    """Looks up the precision facet for a slot, returning 2 as the default."""
+    reg = app_state.final_components_registry.get(type_name)
+    if reg:
+        for s in reg:
+            if s["name"] == slot_name:
+                p = s.get("facets", {}).get("precision")
+                if isinstance(p, int) and 0 <= p <= 12:
+                    return p
+                break
+    return 2
 
 
 class DeviceSession:
@@ -100,7 +110,7 @@ class DeviceSession:
         for type_elem in manifest.iter("type"):
             if type_elem.get("name") == "Component":
                 slots = []
-                for slot_elem in type_elem.iter("slot"):
+                for slot_elem in type_elem.findall("slot"):
                     slot_name = slot_elem.get("name", "")
                     slot_id = int(slot_elem.get("id", "-1"))
                     slot_type = slot_elem.get("type", "int")
@@ -127,7 +137,7 @@ class DeviceSession:
             if type_id_val < 0:
                 continue
             slots = []
-            for slot_elem in type_elem.iter("slot"):
+            for slot_elem in type_elem.findall("slot"):
                 slot_name = slot_elem.get("name", "")
                 slot_id = int(slot_elem.get("id", "-1"))
                 slot_type = slot_elem.get("type", "int")
@@ -276,7 +286,7 @@ class DeviceSession:
                 if name in sox_comp.values:
                     val = sox_comp.values[name]
                     if isinstance(val, float):
-                        val_str = _fmt_float(val)
+                        val_str = _fmt_float(val, _slot_precision(type_qname, name))
                     else:
                         val_str = str(val)
                     ET.SubElement(comp_elem, "prop",
@@ -364,6 +374,7 @@ class DeviceSession:
         if comp_elem is None:
             return None
 
+        type_name = sox_comp.type_name
         slots = self.sox_client.slot_registry.get(
             (sox_comp.kit_id, sox_comp.type_id))
         if slots:
@@ -374,7 +385,10 @@ class DeviceSession:
                 name = slot["name"]
                 if name in sox_comp.values:
                     raw = sox_comp.values[name]
-                    val = _fmt_float(raw) if isinstance(raw, float) else str(raw)
+                    if isinstance(raw, float):
+                        val = _fmt_float(raw, _slot_precision(type_name, name))
+                    else:
+                        val = str(raw)
                     if name in existing_props:
                         existing_props[name].set("val", val)
                     else: