Tasks: Notification Preferences UI

Review Workload Forecast

Decision needed before apply: Yes Chained PRs recommended: Yes Chain strategy: pending 400-line budget risk: High

Unit	Goal	Likely PR	Focused test command	Runtime harness	Rollback boundary
1	Foundation: models, API service, store, validation	PR 1	`npm run typecheck`	N/A — types only	Remove service, store, model files
2	Org policy page + navigation	PR 2	Navigate to `/admin/org/profile/[id]/notifications`	Org profile page loads, toggles render	Remove org notifications page and layout
3	Client override page + navigation	PR 3	Navigate to `/admin/org/[oid]/client/[clientId]/notifications`	Client profile page loads, toggles render	Remove client notifications page and layout
4	Client-facing page + tests	PR 4	Navigate to `/user/profile/notifications`	Landing profile page loads, toggles render	Remove landing notifications page and tests

1.1 Create txclient/src/Models/NotificationPreferences.model.ts — TypeScript interfaces: NotificationChannel, QuietHours, ReminderRule, CompanyNotificationPolicy, ClientNotificationPreferences, ClientCompanyNotificationOverride, upsert params
1.2 Create txclient/src/services/Notifications.Service.ts — 6 API functions using ApiRequest.post<T>(): getCompanyPolicy, upsertCompanyPolicy, getClientPreferences, upsertClientPreferences, getClientCompanyOverride, upsertClientCompanyOverride
1.3 Create txclient/src/Store/NotificationPreferences.Store.ts — Zustand store with mode, form data, dirty flag; actions: setMode, updateFormData, resetForm
1.4 Create txclient/src/Models/NotificationPreferences.validation.ts — Yup schemas: companyPolicySchema (channels min 1, timezone required, quietHours optional HH:mm, reminderRules max 5), clientPrefsSchema (preferredChannels, mutedChannels)

2.1 Create txclient/src/app/admin/(organization-profile)/org/profile/[id]/notifications/layout.tsx — Saveable wrapper loading company policy on mount, dispatching NEED_SAVE/SAVE events
2.2 Create txclient/src/app/admin/(organization-profile)/org/profile/[id]/notifications/page.tsx — Org policy form: channel toggles (3x Switch), quiet hours (2x input time), timezone Textbox, reminder rules dynamic list (max 5) with add/remove buttons
2.3 Modify txclient/src/app/components/OrganizationHeader/OrganizationHeader.tsx — Add "Notificaciones" menu item linking to /admin/org/profile/[id]/notifications with NotificationsIcon

3.1 Create txclient/src/app/admin/(client-profile)/org/[oid]/client/[clientId]/notifications/layout.tsx — Saveable wrapper loading client company override on mount
3.2 Create txclient/src/app/admin/(client-profile)/org/[oid]/client/[clientId]/notifications/page.tsx — Client override form: preferred channels (3x Switch), muted channels (3x Switch)
3.3 Modify txclient/src/app/admin/(client-profile)/org/[oid]/client/[clientId]/layout.tsx — Add "Notificaciones" navigation link to client profile menu

4.1 Create txclient/src/app/user/profile/notifications-preferences/page.tsx — Client preferences form: preferred channels (3x Switch), muted channels (3x Switch); wrapped in Secure component for auth gate
4.2 Modify txclient/src/app/user/profile/page.tsx — Add "Preferencias de notificación" navigation link to user profile menu

5.1 Create txclient/src/Models/__tests__/NotificationPreferences.validation.test.ts — Test Yup schemas: valid inputs pass, invalid channels rejected, timezone required, quietHours format validated, reminderRules max 5 enforced (BLOCKED: no test runner in txclient)
5.2 Create txclient/src/services/__tests__/Notifications.Service.test.ts — Mock ApiRequest.post, verify 6 functions call correct endpoints with correct params (BLOCKED: no test runner in txclient)
5.3 Create txclient/src/Store/__tests__/NotificationPreferences.Store.test.ts — Test store actions: setMode, updateFormData, resetForm, dirty flag transitions (BLOCKED: no test runner in txclient)