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, 5 insertions, 5 deletions

diff --git a/src/lib/Tools/ActivityHistory/Grid.svelte b/src/lib/Tools/ActivityHistory/Grid.svelte
index afa9cd8f..630c5d3b 100644
--- a/src/lib/Tools/ActivityHistory/Grid.svelte
+++ b/src/lib/Tools/ActivityHistory/Grid.svelte
@@ -1,17 +1,17 @@
 <script lang="ts">
+import { onMount } from "svelte";
 import {
-	fillMissingDays,
 	type ActivityHistoryEntry,
 	activityHistory,
+	fillMissingDays,
 } from "$lib/Data/AniList/activity";
-import { onMount } from "svelte";
-import userIdentity from "$stores/identity";
 import type { AniListAuthorisation } from "$lib/Data/AniList/identity";
-import { clearAllParameters } from "../../Utility/parameters";
+import LogInRestricted from "$lib/Error/LogInRestricted.svelte";
 import Skeleton from "$lib/Loading/Skeleton.svelte";
 import tooltip from "$lib/Tooltip/tooltip";
-import LogInRestricted from "$lib/Error/LogInRestricted.svelte";
+import userIdentity from "$stores/identity";
 import locale from "$stores/locale";
+import { clearAllParameters } from "../../Utility/parameters";
 
 export let user: AniListAuthorisation;
 export let activityData: ActivityHistoryEntry[] | null = null;