add submitter timezone

app/javascript/submission_form/form.vue

@@ -1390,6 +1390,7 @@ export default {
 
         if (isLastStep && !emptyRequiredField && !this.inviteSubmitters.length && !this.optionalInviteSubmitters.length) {
           formData.append('completed', 'true')
+          formData.append('timezone', Intl.DateTimeFormat().resolvedOptions().timeZone)
         }
 
         let saveStepRequest

app/models/submitter.rb

@@ -16,6 +16,7 @@
 #  preferences   :text             not null
 #  sent_at       :datetime
 #  slug          :string           not null
+#  timezone      :string
 #  ua            :string
 #  uuid          :string           not null
 #  values        :text             not null

db/migrate/20250613160132_add_timezone_to_submitters.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class AddTimezoneToSubmitters < ActiveRecord::Migration[8.0]
+  def change
+    add_column :submitters, :timezone, :string
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.0].define(version: 2025_06_08_163157) do
+ActiveRecord::Schema[8.0].define(version: 2025_06_13_160132) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "btree_gin"
   enable_extension "plpgsql"
@@ -296,7 +296,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_06_08_163157) do
     t.text "template_fields"
     t.text "template_schema"
     t.text "template_submitters"
-    t.text "source", null: false
+    t.string "source", null: false
     t.string "submitters_order", null: false
     t.string "slug", null: false
     t.text "preferences", null: false
@@ -329,6 +329,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_06_08_163157) do
     t.text "metadata", null: false
     t.bigint "account_id", null: false
     t.datetime "declined_at"
+    t.string "timezone"
     t.index ["account_id", "id"], name: "index_submitters_on_account_id_and_id"
     t.index ["email"], name: "index_submitters_on_email"
     t.index ["external_id"], name: "index_submitters_on_external_id"
@@ -419,7 +420,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_06_08_163157) do
     t.datetime "archived_at"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
-    t.text "uuid", null: false
+    t.string "uuid", null: false
     t.string "otp_secret"
     t.integer "consumed_timestep"
     t.boolean "otp_required_for_login", default: false, null: false

lib/submitters/submit_values.rb

@@ -57,6 +57,7 @@ module Submitters
       submitter.completed_at = Time.current
       submitter.ip = request.remote_ip
       submitter.ua = request.user_agent
+      submitter.timezone = request.params[:timezone]
 
       submitter.values = merge_default_values(submitter)