fix: wake sink preserved on pw-play fallback, logging and cb guards

headsetcontrol/lib/hsc.luau

@@ -166,6 +166,7 @@ function M.wake(cb)
   end
   local dir = noctalia.pluginDir()
   if dir == nil or dir == "" then
+    noctalia.log("wake tone: plugin dir unavailable")
     if cb then cb(false) end
     return
   end
@@ -175,22 +176,35 @@ function M.wake(cb)
     if cb then cb(false) end
     return
   end
-  local argv = { "paplay" }
-  if config.wake_sink ~= "" then
-    table.insert(argv, "--device=" .. config.wake_sink)
-  end
-  table.insert(argv, path)
-  if not noctalia.commandExists("paplay") then
-    argv = { "pw-play", path }
+  local argv
+  if noctalia.commandExists("paplay") then
+    argv = { "paplay" }
+    if config.wake_sink ~= "" then
+      table.insert(argv, "--device=" .. config.wake_sink)
+    end
+    table.insert(argv, path)
+  else
+    argv = { "pw-play" }
+    if config.wake_sink ~= "" then
+      table.insert(argv, "-d")
+      table.insert(argv, config.wake_sink)
+    end
+    table.insert(argv, path)
+    if config.wake_sink == "" then
+      noctalia.log("paplay not found, falling back to pw-play")
+    end
   end
   noctalia.runAsync(argv, function(res)
+    if res.exitCode ~= 0 then
+      noctalia.log("wake tone playback failed, exit " .. tostring(res.exitCode) .. ": " .. string.sub(res.stderr or "", 1, 200))
+    end
     if cb then cb(res.exitCode == 0) end
   end)
 end
 
 -- Checks whether the headset is connected. cb(connected:boolean).
 -- `headsetcontrol --connected` prints `true` or `false` (verified live).
--- In mock mode, reports true when the mock battery level is above 30, else false.
+-- In mock mode, reports true when the mock battery level is above 30, else false (mock connected follows the mock battery walk: true while level > 30).
 function M.fetchConnected(cb)
   if config.mock then
     if cb then cb(mockBattery > 30) end
@@ -201,10 +215,10 @@ function M.fetchConnected(cb)
   table.insert(argv, "--connected")
   noctalia.runAsync(argv, function(res)
     if res.exitCode ~= 0 then
-      cb(false)
+      if cb then cb(false) end
       return
     end
-    cb(noctalia.string.trim(res.stdout or "") == "true")
+    if cb then cb(noctalia.string.trim(res.stdout or "") == "true") end
   end)
 end