Admin Settings and Form Configuration Files

[adityapat24]

Goal

Create the admin settings panel (date controls, show-decision toggle, form config editor) and the singleton data layer. No real logic yet, stubs only

This ticket also creates the shared (admin)/layout.tsx file that other admin tickets will rely on, plus the admin landing page.

Folders to create

• src/app/(admin)/admin/settings/
• src/app/api/v1/dates/registration-open/
• src/app/api/v1/dates/registration-closed/
• src/app/api/v1/dates/confirm-by/
• src/app/api/v1/show-decision/
• src/app/api/v1/admin/form-config/
• src/lib/admin/
• src/components/admin/

Files to create

Routes

• src/app/(admin)/layout.tsx — admin shell (sidebar, header); placeholder admin check
• src/app/(admin)/admin/page.tsx — admin landing, tiles linking to settings/applicants/stats
• src/app/(admin)/admin/settings/page.tsx — date controls + show-decision toggle + form config editor
• src/app/api/v1/dates/registration-open/route.ts — GET/POST singleton
• src/app/api/v1/dates/registration-closed/route.ts — GET/POST singleton
• src/app/api/v1/dates/confirm-by/route.ts — GET/POST singleton
• src/app/api/v1/show-decision/route.ts — GET/POST singleton
• src/app/api/v1/admin/form-config/route.ts — GET/POST form configuration (questions, sections)

Library

• src/lib/admin/singleton-keys.ts — SingletonKey union ('registration-open' | 'registration-closed' | 'confirm-by' | 'show-decision')
• src/lib/admin/singleton-service.ts — getSingleton(key), setSingleton(key, value) for singleton_data
• src/lib/admin/form-config-service.ts — getFormConfig(), updateFormConfig() — admin-editable questions
• src/lib/admin/types.ts — SingletonValue<K>, DateSingletonValue, BooleanSingletonValue, FormConfig, FormConfigSection, FormConfigQuestion types

Components

• src/components/admin/AdminSidebar.tsx — admin nav, used by admin layout
• src/components/admin/DateControl.tsx — date+time picker for a singleton key, save button
• src/components/admin/ShowDecisionToggle.tsx — boolean toggle for show-decision flag
• src/components/admin/FormConfigEditor.tsx — list of questions, add/edit/reorder UI

Acceptance criteria

• All folders and files listed above exist and the project compiles.
• /admin and /admin/settings render placeholder UI.
• All API routes return typed mocks for GET and 501 for POST.