fix(docs): frontend load must fetch /api/docs (not /docs) for SSR proxy

- hooks.server.ts only proxies /api/* to Flask (strips /api prefix)
- load() fetching /docs (no /api) caused SSR recursion/500
- Revert to /api/docs so proxy reaches Flask /docs route correctly
- selectDoc client fetch already uses /api/docs (correct)

frontend/src/routes/docs/+page.ts

@@ -3,7 +3,7 @@ import type { DocsIndexEntry } from '$types/docs';
 import { error } from '@sveltejs/kit';
 
 export const load: PageLoad = async ({ fetch }) => {
-	const res = await fetch('/docs');
+	const res = await fetch('/api/docs');
 	if (!res.ok) {
 		throw error(500, 'Gagal memuat daftar dokumentasi');
 	}

frontend/src/routes/docs/[slug]/+page.ts

@@ -3,7 +3,7 @@ import type { DocContent } from '$types/docs';
 import { error } from '@sveltejs/kit';
 
 export const load: PageLoad = async ({ params, fetch }) => {
-	const res = await fetch(`/docs/${params.slug}`);
+	const res = await fetch(`/api/docs/${params.slug}`);
 	if (!res.ok) {
 		throw error(404, 'Dokumen tidak ditemukan');
 	}