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

@@ -127,6 +127,25 @@ CREATE TABLE user_social_logins (
 CREATE INDEX idx_users_email_lower ON users (LOWER(email));
 CREATE INDEX idx_users_account_role ON users (account_role);
 
+-- =======================================
+-- VERIFICATION CODES TABLE
+-- =======================================
+CREATE TYPE verification_purpose AS ENUM ('email_verify', 'password_reset');
+
+CREATE TABLE verification_codes (
+    id BIGSERIAL PRIMARY KEY,
+    code CHAR(32) NOT NULL UNIQUE,
+    user_id CHAR(12) NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    purpose verification_purpose NOT NULL,
+    expires_at TIMESTAMPTZ NOT NULL,
+    used_at TIMESTAMPTZ,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX idx_verification_codes_code ON verification_codes (code);
+CREATE INDEX idx_verification_codes_user_purpose ON verification_codes (user_id, purpose) WHERE used_at IS NULL;
+CREATE INDEX idx_verification_codes_expires ON verification_codes (expires_at) WHERE used_at IS NULL;
+
 -- =======================================
 -- SERVICES TABLE
 -- =======================================