feat: features 025-032 - favoritos, contatos, trabalhe-conosco, area-cliente, navbar, hero-light-dark, performance-homepage

- feat(025): favoritos locais com FavoritesContext, HeartButton, PublicFavoritesPage
- feat(026): central de contatos admin (leads/contatos unificados)
- feat(027): configuração da página de contato via admin
- feat(028): trabalhe conosco - candidaturas com upload e admin
- feat(029): UX área do cliente - visitas, comparação, perfil
- feat(030): navbar UX - menu mobile, ThemeToggle, useFavorites
- feat(031): hero light/dark - imagens separadas por tema, upload, preview, seed
- feat(032): performance homepage - Promise.all parallel fetches, sessionStorage cache,
  preload hero image, loading=lazy nos cards, useInView hook, will-change carrossel,
  keyframes em index.css, AgentsCarousel e HomeScrollScene via props
- fix: light mode HomeScrollScene - gradiente, cores de texto, scroll hint

migrations: g1h2i3j4k5l6 (source em leads), h1i2j3k4l5m6 (contact_config),
            i1j2k3l4m5n6 (job_applications), j2k3l4m5n6o7 (hero theme images)

backend/app/routes/contact_config.py

@@ -0,0 +1,14 @@
+from flask import Blueprint, jsonify
+
+from app.models.contact_config import ContactConfig
+from app.schemas.contact_config import ContactConfigOut
+
+contact_config_bp = Blueprint("contact_config", __name__, url_prefix="/api/v1")
+
+
+@contact_config_bp.get("/contact-config")
+def get_contact_config():
+    config = ContactConfig.query.first()
+    if config is None:
+        return jsonify({}), 200
+    return jsonify(ContactConfigOut.model_validate(config).model_dump())