fix(organization): align date formats and fix address field naming

- Fix date format mismatch between Miscellaneous and Organization constants
- Fix default date format casing ('DD MMM yyyy' -> 'DD MMM YYYY')
- Rename address fields from address_1/address_2 to address1/address2

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/webapp/src/containers/Preferences/General/GeneralForm.tsx

@@ -111,12 +111,12 @@ export default function PreferencesGeneralForm({ isSubmitting }) {
       >
         <Stack>
           <FInputGroup
-            name={'address.address_1'}
+            name={'address.address1'}
             placeholder={'Address 1'}
             fastField
           />
           <FInputGroup
-            name={'address.address_2'}
+            name={'address.address2'}
             placeholder={'Address 2'}
             fastField
           />