add goal completion composition.

svelte-ui/src/models/goal.ts

@@ -2,6 +2,8 @@ import type Group from "./group";
 import type Item from "./item";
 import type { LogResult } from "./log";
 
+export type GoalCompositionMode = "task" | "item"
+
 export default interface Goal {
   id: string
   groupId: string
@@ -12,7 +14,7 @@ export default interface Goal {
   name: string
   description: string
   unweighted: boolean
-  compositionMode: string
+  compositionMode: GoalCompositionMode
 }
 
 export interface GoalFilter {