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/migrations/versions/i1j2k3l4m5n6_add_job_applications.py

@@ -0,0 +1,44 @@
+"""add job_applications table
+
+Revision ID: i1j2k3l4m5n6
+Revises: h1i2j3k4l5m6
+Create Date: 2026-04-21 00:00:00.000000
+
+"""
+
+import sqlalchemy as sa
+from alembic import op
+
+revision = "i1j2k3l4m5n6"
+down_revision = "h1i2j3k4l5m6"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.create_table(
+        "job_applications",
+        sa.Column("id",            sa.Integer(),     autoincrement=True, nullable=False),
+        sa.Column("name",          sa.String(150),   nullable=False),
+        sa.Column("email",         sa.String(254),   nullable=False),
+        sa.Column("phone",         sa.String(30),    nullable=True),
+        sa.Column("role_interest", sa.String(100),   nullable=False),
+        sa.Column("message",       sa.Text(),        nullable=False),
+        sa.Column("file_name",     sa.String(255),   nullable=True),
+        sa.Column("status",        sa.String(50),    nullable=False, server_default="pending"),
+        sa.Column(
+            "created_at",
+            sa.DateTime(),
+            nullable=False,
+            server_default=sa.text("now()"),
+        ),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index("ix_job_applications_created_at", "job_applications", ["created_at"], unique=False)
+    op.create_index("ix_job_applications_status",     "job_applications", ["status"],     unique=False)
+
+
+def downgrade():
+    op.drop_index("ix_job_applications_status",     table_name="job_applications")
+    op.drop_index("ix_job_applications_created_at", table_name="job_applications")
+    op.drop_table("job_applications")