feat: Implement routines feature with CRUD operations and child assignment

- Add backend routines management with add, get, update, delete, and list functionalities.
- Create models for Routine, RoutineItem, RoutineSchedule, and RoutineExtension.
- Develop event types for routine confirmation and modification.
- Implement frontend components for routine assignment, confirmation dialog, and routine management views.
- Add unit tests for routine API and integration tests for routine CRUD flow.
- Create end-to-end test plan for routines feature covering parent and child interactions.

frontend/src/common/api.ts

@@ -168,7 +168,7 @@ export async function getTrackingEventsForChild(params: {
 export async function setChildOverride(
   childId: string,
   entityId: string,
-  entityType: 'task' | 'reward',
+  entityType: 'task' | 'reward' | 'routine',
   customValue: number,
 ): Promise<Response> {
   return fetch(`/api/child/${childId}/override`, {
@@ -182,6 +182,14 @@ export async function setChildOverride(
   })
 }
 
+export async function setChildRoutineOverride(
+  childId: string,
+  routineId: string,
+  customValue: number,
+): Promise<Response> {
+  return setChildOverride(childId, routineId, 'routine', customValue)
+}
+
 /**
  * Get all overrides for a specific child.
  */
@@ -231,6 +239,37 @@ export async function deleteChoreSchedule(childId: string, taskId: string): Prom
   })
 }
 
+/**
+ * Get the schedule for a specific child + routine pair.
+ */
+export async function getRoutineSchedule(childId: string, routineId: string): Promise<Response> {
+  return fetch(`/api/child/${childId}/routine/${routineId}/schedule`)
+}
+
+/**
+ * Create or replace the schedule for a specific child + routine pair.
+ */
+export async function setRoutineSchedule(
+  childId: string,
+  routineId: string,
+  schedule: object,
+): Promise<Response> {
+  return fetch(`/api/child/${childId}/routine/${routineId}/schedule`, {
+    method: 'PUT',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(schedule),
+  })
+}
+
+/**
+ * Delete the schedule for a specific child + routine pair.
+ */
+export async function deleteRoutineSchedule(childId: string, routineId: string): Promise<Response> {
+  return fetch(`/api/child/${childId}/routine/${routineId}/schedule`, {
+    method: 'DELETE',
+  })
+}
+
 /**
  * Extend a timed-out chore for the remainder of today only.
  * `localDate` is the client's local ISO date (e.g. '2026-02-22').
@@ -247,6 +286,22 @@ export async function extendChoreTime(
   })
 }
 
+/**
+ * Extend a timed-out routine for the remainder of today only.
+ * `localDate` is the client's local ISO date (e.g. '2026-02-22').
+ */
+export async function extendRoutineTime(
+  childId: string,
+  routineId: string,
+  localDate: string,
+): Promise<Response> {
+  return fetch(`/api/child/${childId}/routine/${routineId}/extend`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ date: localDate }),
+  })
+}
+
 // ── Chore Confirmation API ──────────────────────────────────────────────────
 
 /**
@@ -310,3 +365,28 @@ export async function resetChore(childId: string, taskId: string): Promise<Respo
 export async function fetchPendingConfirmations(): Promise<Response> {
   return fetch('/api/pending-confirmations')
 }
+
+/**
+ * Child confirms they completed a routine.
+ */
+export async function confirmRoutine(childId: string, routineId: string): Promise<Response> {
+  return fetch(`/api/child/${childId}/confirm-routine`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ routine_id: routineId }),
+  })
+}
+
+/**
+ * Child cancels a pending routine confirmation.
+ */
+export async function cancelRoutineConfirmation(
+  childId: string,
+  routineId: string,
+): Promise<Response> {
+  return fetch(`/api/child/${childId}/cancel-routine-confirmation`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ routine_id: routineId }),
+  })
+}