minor: heavily simplify server and app content. unify styling (#4)

Co-authored-by: Madison Grubb <madison@elastiflow.com>
Reviewed-on: #4

server/utils/session.js

@@ -1,15 +1,6 @@
-const DEFAULT_DAYS = 7
-const MIN_DAYS = 1
-const MAX_DAYS = 365
+const [MIN_DAYS, MAX_DAYS, DEFAULT_DAYS] = [1, 365, 7]
 
-/**
- * Session lifetime in days (for cookie and DB expires_at). Uses SESSION_MAX_AGE_DAYS.
- * Clamped to 1–365 days.
- */
 export function getSessionMaxAgeDays() {
-  const raw = process.env.SESSION_MAX_AGE_DAYS != null
-    ? Number.parseInt(process.env.SESSION_MAX_AGE_DAYS, 10)
-    : Number.NaN
-  if (Number.isFinite(raw)) return Math.max(MIN_DAYS, Math.min(MAX_DAYS, raw))
-  return DEFAULT_DAYS
+  const raw = Number.parseInt(process.env.SESSION_MAX_AGE_DAYS ?? '', 10)
+  return Number.isFinite(raw) ? Math.max(MIN_DAYS, Math.min(MAX_DAYS, raw)) : DEFAULT_DAYS
 }