Fix formatting and add type annotations to task completer function

lib/utils/task.lua

@@ -33,11 +33,11 @@ function task.update(dt)
             t.elapsed = t.elapsed + dt * 1000
             local progress = math.min(t.elapsed / t.duration, 1)
             local value = t.easing(progress)
-    
+
             for key, targetValue in pairs(t.properties) do
                 t.target[key] = lerp(t.initial[key], targetValue, value)
             end
-    
+
             if progress >= 1 then
                 t.completed = true
                 table.remove(activeTweens, i)
@@ -50,7 +50,8 @@ function task.update(dt)
 end
 
 --- Возвращает Completer — объект, который позволяет вручную завершить таску.
---- @return table completer { complete: fun(val: T) }, Task<T> future
+--- @generic T
+--- @return { complete: fun(val: T) }, Task<T> future
 function task.completer()
     local c = { completed = false, value = nil, cb = nil }
     function c:complete(val)
@@ -61,8 +62,11 @@ function task.completer()
     end
 
     local future = function(callback)
-        if c.completed then callback(c.value)
+        if c.completed then
-        else c.cb = callback end
+            callback(c.value)
+        else
+            c.cb = callback
+        end
     end
     return c, future
 end
@@ -86,7 +90,7 @@ end
 --- @return Task<nil>
 function task.tween(target, properties, duration, easing)
     task.cancel(target) -- Cancel previous animations on this target
-    
+
     local initial = {}
     for k, _ in pairs(properties) do
         initial[k] = target[k]