feat(debug): add dry-run mutations mode

New 'Dry-run mutations' toggle in the Debug settings panel blocks
outgoing list updates (the + button) and skips the post-mutation
refresh so optimistic UI changes persist locally for testing. The
mutation gate sits in incrementMediaProgress; CleanAnimeList only
revalidates when the request actually went out.

1 files changed, 14 insertions, 2 deletions

diff --git a/src/lib/Media/Anime/cache.ts b/src/lib/Media/Anime/cache.ts
index e988f255..e1a711ca 100644
--- a/src/lib/Media/Anime/cache.ts
+++ b/src/lib/Media/Anime/cache.ts
@@ -2,6 +2,7 @@ import { get } from "svelte/store";
 import anime from "$stores/anime";
 import { mediaListCollection, Type } from "../../Data/AniList/media";
 import lastPruneTimes from "$stores/lastPruneTimes";
+import settings from "$stores/settings";
 import type {
 	AniListAuthorisation,
 	UserIdentity,
@@ -26,8 +27,19 @@ export const incrementMediaProgress = (
 	id: number,
 	progress: number | undefined,
 	user: AniListAuthorisation,
-	callback: () => void,
+	callback: (skipped?: boolean) => void,
 ) => {
+	if (get(settings).debugDryRunMutations) {
+		console.log(
+			`[dry-run] SaveMediaListEntry(mediaId: ${id}, progress: ${
+				(progress || 0) + 1
+			}) skipped`,
+		);
+		callback(true);
+
+		return;
+	}
+
 	fetch("https://graphql.anilist.co", {
 		method: "POST",
 		headers: {
@@ -40,5 +52,5 @@ export const incrementMediaProgress = (
 				(progress || 0) + 1
 			}) { id } }`,
 		}),
-	}).then(callback);
+	}).then(() => callback(false));
 };