feat: enhance Navbar with user profile and configuration links

- Updated Navbar component to include a link to the configuration page.
- Added a new Settings icon and link for user configuration.
- Improved user session handling and UI updates based on authentication state.

feat: implement OnboardingDialog for user setup

- Created OnboardingDialog component to guide users through initial setup.
- Added functionality to collect additional email addresses during onboarding.
- Integrated toast notifications for error handling during email addition.

feat: extend Supabase admin functions for user management

- Added functions to retrieve user IDs and full user information by email.
- Implemented error handling and logging for database operations.

feat: update Supabase schema with new user features

- Created new tables: user_profiles, additional_emails, and email_processing_usage.
- Enabled Row Level Security (RLS) on new tables with appropriate policies.
- Added triggers and functions for automatic user profile creation and email usage tracking.

feat: create public users table for simplified access

- Established a public.users table to mirror relevant auth.users data.
- Implemented triggers to automatically populate public.users upon user creation.
- Set up RLS policies to restrict access to user data.

chore: add configuration files for Supabase local development

- Included .gitignore and config.toml for local Supabase setup.
- Configured email testing server and other development settings.

feat: add configuration page for user settings

- Created configuration.astro page to manage user settings.
- Integrated AuthGuard to protect the configuration route.

supabase/migrations/20250607006000_create_public_users_table.sql

@@ -0,0 +1,41 @@
+-- Create a public users table that mirrors relevant auth.users data
+-- This avoids the need for SECURITY DEFINER functions
+
+-- Create the public users table
+CREATE TABLE public.users (
+  id UUID REFERENCES auth.users NOT NULL PRIMARY KEY,
+  email TEXT NOT NULL,
+  created_at TIMESTAMPTZ DEFAULT NOW() NOT NULL
+);
+
+-- Create indexes for performance
+CREATE INDEX idx_users_email ON public.users(email);
+
+-- Create RLS policies for the users table
+ALTER TABLE public.users ENABLE ROW LEVEL SECURITY;
+
+-- Users can only read their own data
+CREATE POLICY "Users can view own profile" ON public.users
+  FOR SELECT USING (auth.uid() = id);
+
+-- Create a function to handle new user creation
+CREATE OR REPLACE FUNCTION public.handle_new_user_add_public_users()
+RETURNS trigger AS $$
+BEGIN
+  INSERT INTO public.users (id, email, created_at)
+  VALUES (new.id, new.email, new.created_at);
+  RETURN new;
+END;
+$$ LANGUAGE plpgsql SECURITY DEFINER;
+
+-- Create trigger to automatically create public.users record when auth.users is created
+-- Drop existing trigger if it exists
+DROP TRIGGER IF EXISTS on_auth_user_created_add_public_users ON auth.users;
+
+CREATE TRIGGER on_auth_user_created_add_public_users
+  AFTER INSERT ON auth.users
+  FOR EACH ROW EXECUTE PROCEDURE public.handle_new_user_add_public_users();
+
+-- Grant necessary permissions
+GRANT SELECT ON public.users TO authenticated;
+GRANT SELECT ON public.users TO anon;