desloppify: code health overhaul plus abuse hardening (140 green, strict 87.2)

Honest baseline after removing 45 gaming suppressions. Structural: lib/game plus root hooks extraction, CORS origin echo, DEV_ORIGINS layering. Fixes: error-cause binding, discord 5xx split, null-cache guard, co-located tests, rejecting-fetch coverage, naming and typing cleanup, socket controller, cache bound, cascade helpers, latch resets. Hardening: per-IP rate limit on API routes, deterministic-miss UX, retry cooldown plus cap. Suite 140 green, build plus lint clean.

components/contact-section.tsx

@@ -8,9 +8,9 @@ import {
     SPOTIFY_URL,
     STEAM_URL,
 } from "@/lib/site";
-import { CopyEmail } from "./copy-email";
-import { SectionHeading } from "./section-heading";
+import { CopyEmail } from "@/components/copy-email";
 
+import { SectionHeading } from "@/components/section-heading";
 export function ContactSection({ dict }: { dict: Dictionary["contact"] }) {
     const entries = [
         { label: dict.github, sub: "@fristyxd", href: GITHUB_URL, icon: "/icons/github.svg" },