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, 4 insertions, 4 deletions

diff --git a/src/lib/Home/LastActivity.svelte b/src/lib/Home/LastActivity.svelte
index 1b4952f8..6a8c3f6a 100644
--- a/src/lib/Home/LastActivity.svelte
+++ b/src/lib/Home/LastActivity.svelte
@@ -1,11 +1,11 @@
 <script lang="ts">
-import userIdentity from "$stores/identity";
 import { onMount } from "svelte";
+import { get } from "svelte/store";
 import type { AniListAuthorisation } from "$lib/Data/AniList/identity";
-import { lastActivityDate } from "../Data/AniList/lastActivity";
-import settings from "$stores/settings";
+import userIdentity from "$stores/identity";
 import locale from "$stores/locale";
-import { get } from "svelte/store";
+import settings from "$stores/settings";
+import { lastActivityDate } from "../Data/AniList/lastActivity";
 
 let { user }: { user: AniListAuthorisation } = $props();
 let lastActivityWasToday = $state(true);