1. 打开 supabase.com，用 GitHub 账号登录 → New project（名字随便填，Region 选 Singapore，数据库密码记一下）
2. 建好后左侧 SQL Editor → New query → 粘贴下面这段 → 点 Run
3. 左侧 Project Settings → API Keys，复制 Project URL 和 publishable key（sb_publishable_ 开头）填到下面

create table if not exists public.shuati_state (
  user_id uuid primary key references auth.users(id) on delete cascade,
  data jsonb not null default '{}'::jsonb,
  rev bigint not null default 1,
  updated_at timestamptz not null default now()
);
alter table public.shuati_state enable row level security;
drop policy if exists "own_state" on public.shuati_state;
create policy "own_state" on public.shuati_state
  for all to authenticated
  using (auth.uid() = user_id)
  with check (auth.uid() = user_id);
grant all on public.shuati_state to authenticated;

create table if not exists public.submissions (
  id uuid primary key default gen_random_uuid(),
  uploader uuid not null references auth.users(id) on delete cascade,
  uploader_email text,
  fname text not null,
  ftype text,
  fsize int,
  note text,
  content text,
  created_at timestamptz not null default now()
);
alter table public.submissions enable row level security;
drop policy if exists "sub_insert" on public.submissions;
create policy "sub_insert" on public.submissions
  for insert to authenticated
  with check (auth.uid() = uploader);
drop policy if exists "sub_read_own" on public.submissions;
create policy "sub_read_own" on public.submissions
  for select to authenticated
  using (auth.uid() = uploader);
drop policy if exists "sub_del_own" on public.submissions;
create policy "sub_del_own" on public.submissions
  for delete to authenticated
  using (auth.uid() = uploader);

上面框里可以左右滑，看不全不影响，点下面直接复制。

📋 复制这段 SQL