library: spinner loader + hide native search clear button

.env.example

@@ -46,6 +46,20 @@ STRAPI_URL=https://staging-strapi.keepsimple.io
 # UX Cat API endpoint — staging instance for development
 NEXT_PUBLIC_UXCAT_API=https://staging-uxcat.keepsimple.io/
 
+# ---------- Library autofill (OPTIONAL) ----------
+# Google Cloud API key(s) powering book + YouTube autofill in the Library.
+# Audio suggestions use the keyless iTunes Search API and need no key.
+# Server-only — never prefix with NEXT_PUBLIC_.
+# Setup: https://console.cloud.google.com/apis/credentials
+#
+# GOOGLE_APIS_KEY — needs "Books API" enabled. Powers book title suggestions.
+#   Without it, book search falls back to the low anonymous quota.
+# YOUTUBE_API_KEY — needs "YouTube Data API v3" enabled. Powers video autofill.
+#   Falls back to GOOGLE_APIS_KEY if unset, so a single key with BOTH APIs
+#   enabled also works. Without either, video autofill is disabled.
+GOOGLE_APIS_KEY=
+YOUTUBE_API_KEY=
+
 # ---------- NextAuth ----------
 # Generate a random secret with: `openssl rand -base64 32`
 NEXTAUTH_SECRET=

AGENTS.md

@@ -464,6 +464,8 @@ Key variables:
 - `NEXT_PUBLIC_ENV` — `local` / `staging` / `prod`
 - `NEXT_PUBLIC_INDEXING` — `on` / `off` (controls GA tracking)
 - `NEXT_PUBLIC_DOMAIN` — canonical domain for SEO/OG tags
+- `GOOGLE_APIS_KEY` — server-only Google Cloud key with **Books API** enabled; powers Library book suggestions. Optional: book search degrades to the keyless anonymous quota without it.
+- `YOUTUBE_API_KEY` — server-only Google Cloud key with **YouTube Data API v3** enabled; powers Library video autofill. Falls back to `GOOGLE_APIS_KEY` if unset, so a single key with both APIs enabled also works. Video autofill is disabled if neither is set. Audio autofill (iTunes Search API) needs no key.
 
 The `next.config.js` loads env from `.env.{APP_ENV}` (e.g., `.env.local`, `.env.staging`, `.env.prod`).