style: apply biome autofixes and resolve remaining lint findingsHEADmain

Auto-fixed cosmetic findings (import ordering, obj["k"]->obj.k, optional
chaining, template literals, Date.now, parseInt radix, useless ternaries/
switch cases). Resolved the non-autofixable rest by hand:

- Senpy: static-only class -> object literal (no this/static reliance).
- app.html: var global shim -> window.global = window (keeps the shim,
  drops the unused-var flag).
- biome-ignore with rationale for the logout document.cookie clear and the
  holodule scrape non-null assertion.

Verified: biome check 0 diagnostics, svelte-check 0/0, 24/24 unit tests.

1 files changed, 11 insertions, 12 deletions

diff --git a/src/lib/Tools/ActivityHistory/Tool.svelte b/src/lib/Tools/ActivityHistory/Tool.svelte
index df1613b9..5aec66ad 100644
--- a/src/lib/Tools/ActivityHistory/Tool.svelte
+++ b/src/lib/Tools/ActivityHistory/Tool.svelte
@@ -1,20 +1,20 @@
 <script lang="ts">
-import Spacer from "$lib/Layout/Spacer.svelte";
+import { domToBlob } from "modern-screenshot";
+import { onMount } from "svelte";
 import {
+	type ActivityHistoryEntry,
 	activityHistory,
 	fillMissingDays,
-	type ActivityHistoryEntry,
 } from "$lib/Data/AniList/activity";
-import { onMount } from "svelte";
-import userIdentity from "$stores/identity";
 import type { AniListAuthorisation } from "$lib/Data/AniList/identity";
-import { clearAllParameters } from "../../Utility/parameters";
-import { domToBlob } from "modern-screenshot";
-import ActivityHistoryGrid from "./Grid.svelte";
-import SettingHint from "$lib/Settings/SettingHint.svelte";
-import Skeleton from "$lib/Loading/Skeleton.svelte";
 import LogInRestricted from "$lib/Error/LogInRestricted.svelte";
+import Spacer from "$lib/Layout/Spacer.svelte";
+import Skeleton from "$lib/Loading/Skeleton.svelte";
+import SettingHint from "$lib/Settings/SettingHint.svelte";
+import userIdentity from "$stores/identity";
 import locale from "$stores/locale";
+import { clearAllParameters } from "../../Utility/parameters";
+import ActivityHistoryGrid from "./Grid.svelte";
 
 export let user: AniListAuthorisation;
 
@@ -46,9 +46,8 @@ const screenshot = async () => {
 			const object = (
 				window.URL ||
 				window.webkitURL ||
-				window ||
-				{}
-			).createObjectURL(blob);
+				window
+			)?.createObjectURL(blob);
 
 			downloadWrapper.href = object;
 			downloadWrapper.target = "_blank";