fix: threshold band and failure-preserving battery streak, panel back to normalize

headsetcontrol/lib/hsc.luau

@@ -244,22 +244,35 @@ end
 
 -- Confirms below-threshold readings: a lone reading at or below `low`
 -- is normalized to unavailable (no false widget value or warning); two
--- in a row pass through as genuinely low. `low` is the caller's
--- low-battery threshold (e.g. the battery_low setting). Single owner is
--- the service entry; the panel uses it for its one-shot wake read with
--- the same threshold. All unavailable/malformed forms reset the streak.
+-- in a row pass through as genuinely low. Readings in (low, low+5] show
+-- as-is without touching the streak (threshold hover); readings above
+-- low+5 reset it. Fetch failures (nil/malformed input) carry no
+-- information and leave the streak untouched; an explicit device
+-- unavailable (level < 0) resets it. Single owner is the service entry.
 function M.stableBattery(battery, low)
-  local norm = M.normalizeBattery(battery)
+  if battery == nil or type(battery) ~= "table" then
+    return { status = "BATTERY_UNAVAILABLE", level = -1 }
+  end
+  local level = tonumber(battery.level)
+  if level == nil then
+    return { status = "BATTERY_UNAVAILABLE", level = -1 }
+  end
   local threshold = tonumber(low) or 20
-  if norm.level >= 0 and norm.level <= threshold then
+  if level < 0 then
+    lowStreak = 0
+    return { status = "BATTERY_UNAVAILABLE", level = -1 }
+  end
+  if level <= threshold then
     lowStreak = lowStreak + 1
     if lowStreak >= 2 then
-      return norm
+      return { status = battery.status, level = level }
     end
     return { status = "BATTERY_UNAVAILABLE", level = -1 }
   end
-  lowStreak = 0
-  return norm
+  if level > threshold + 5 then
+    lowStreak = 0
+  end
+  return { status = battery.status, level = level }
 end
 
 -- chatmix direction is device-ambiguous. Negative = game side on signed-convention

headsetcontrol/panel.luau

@@ -110,7 +110,7 @@ function onWake()
     end
     hsc.fetchStatus(function(status)
       if status ~= nil then
-        noctalia.state.set("battery", hsc.stableBattery(status.battery, noctalia.getConfig("battery_low")))
+        noctalia.state.set("battery", hsc.normalizeBattery(status.battery))
         noctalia.state.set("chatmix", status.chatmix or 0)
         noctalia.state.set("lastUpdate", noctalia.nowMs())
       end

headsetcontrol/service.luau

@@ -41,12 +41,12 @@ local function handleStatus(status)
     return
   end
   noctalia.state.set("error", "")
-  local battery = hsc.stableBattery(status.battery, config().battery_low)
+  local low = tonumber(config().battery_low) or 20
+  local battery = hsc.stableBattery(status.battery, low)
   noctalia.state.set("battery", battery)
   noctalia.state.set("chatmix", status.chatmix or 0)
   noctalia.state.set("lastUpdate", noctalia.nowMs())
   if battery.level ~= nil and battery.level >= 0 and battery.status ~= "BATTERY_UNAVAILABLE" then
-    local low = config().battery_low or 20
     if battery.level <= low and not warned then
       warned = true
       noctalia.notifyError(