-- Add missing columns to profile_privacy_settings
ALTER TABLE public.profile_privacy_settings 
ADD COLUMN IF NOT EXISTS default_post_visibility TEXT NOT NULL DEFAULT 'public',
ADD COLUMN IF NOT EXISTS is_private_profile BOOLEAN NOT NULL DEFAULT FALSE;

-- Ensure blocks table exists
CREATE TABLE IF NOT EXISTS public.blocks (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    blocker_id UUID NOT NULL REFERENCES public.profiles(id) ON DELETE CASCADE,
    blocked_id UUID NOT NULL REFERENCES public.profiles(id) ON DELETE CASCADE,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    UNIQUE(blocker_id, blocked_id)
);