feat: add email verification, profile pictures, deposits, and calendar

export
Backend:
- Add email verification code generation and verification endpoints
- Add profile picture upload with S3 storage and image processing
- Add deposit_required field to users with 48h advance booking
  requirement
- Add loyalty stamps that accumulate on completed bookings
- Auto-transition bookings: confirmed → in_progress → completed
- Add booking cancellation handler with no-show detection
- Add ICS calendar file download endpoint for bookings
- Sync bookings to CalDAV on confirmation
  Frontend:
- Add schedule page route
- Add avatar and image-cropper UI components
- Update shadcn-svelte components (button, dialog)
- Add "Add to Calendar" button in booking modal
  Database:
- Add verification_codes table
- Add profile_pic_url, loyalty_stamps, deposits_required to users
- Various schema updates

init-scripts/init-script.sql

@@ -51,6 +51,8 @@ CREATE OR REPLACE FUNCTION generate_service_id() RETURNS CHAR(12) AS $$ SELECT g
 CREATE OR REPLACE FUNCTION generate_booking_id() RETURNS CHAR(12) AS $$ SELECT generate_short_id('bookings'); $$ LANGUAGE sql;
 CREATE OR REPLACE FUNCTION generate_payment_id() RETURNS CHAR(12) AS $$ SELECT generate_short_id('payments'); $$ LANGUAGE sql;
 
+CREATE OR REPLACE FUNCTION generate_verification_code() RETURNS CHAR(12) AS $$ SELECT substr(encode(gen_random_bytes(6), 'hex'), 1, 12); $$ LANGUAGE sql;
+
 CREATE OR REPLACE FUNCTION generate_referral_code()
 RETURNS CHAR(12) AS $$
 DECLARE
@@ -107,6 +109,8 @@ CREATE TABLE users (
     -- Audit fields
     created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
     updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    -- Deposit tracking: remaining deposits needed (0-3). Reduces by 1 when booking with payment completes.
+    deposits_required INT NOT NULL DEFAULT 3,
     -- staff fields
     notes TEXT
 );
@@ -134,7 +138,7 @@ CREATE TYPE verification_purpose AS ENUM ('email_verify', 'password_reset');
 
 CREATE TABLE verification_codes (
     id BIGSERIAL PRIMARY KEY,
-    code CHAR(32) NOT NULL UNIQUE,
+    code CHAR(12) NOT NULL UNIQUE DEFAULT generate_verification_code(),
     user_id CHAR(12) NOT NULL REFERENCES users(id) ON DELETE CASCADE,
     purpose verification_purpose NOT NULL,
     expires_at TIMESTAMPTZ NOT NULL,
@@ -273,7 +277,8 @@ CREATE UNIQUE INDEX idx_group_application_week ON exceptional_group_applications
 -- =======================================
 -- PAYMENTS TABLE
 -- =======================================
-
+-- PAYMENTS TABLE
+-- =======================================
 CREATE SEQUENCE invoice_number_seq
     START WITH 1
     INCREMENT BY 1
@@ -360,7 +365,7 @@ INSERT INTO business_settings (
     'https://www.website.co.uk'
 );
 
-CREATE TYPE admin_notification_reason AS ENUM ('pending_booking', 'cancelled_booking', 'rescheduled_booking', '1_week_no_pay', '1_month_no_pay', 'affiliate_claim');
+CREATE TYPE admin_notification_reason AS ENUM ('pending_booking', 'cancelled_booking', 'rescheduled_booking', '1_week_no_pay', '1_month_no_pay', 'affiliate_claim', 'late_cancellation', 'no_deposit', 'deposit_paid');
 
 CREATE TABLE admin_notifications (
     id SERIAL PRIMARY KEY,