feat(parent,auth,onboarding,files,notifications,adaptive-practice,ai): add module updates

parent:

- Add parent-student-attendance-detail component

auth:

- Add actions, data-access, schema, services, types

onboarding:

- Add parent-children-form and hooks directory

files:

- Add actions, schema, hooks directory

notifications:

- Add schema and schema test

adaptive-practice:

- Add answer-input, answer-result, practice-result-view, practice-starter-with-nav

- Add question-card, question-content, lib and services directories

ai:

- Add context/create-ai-client-service, hooks/use-drag-position, hooks/use-position-persistence

src/modules/ai/services/usage-tracker.ts

@@ -5,7 +5,7 @@ import { recordAiEvent } from "../data-access"
 
 export type AiUsageEvent = {
   userId: string
-  capability: "chat" | "similar_question" | "grading_assist" | "lesson_content" | "question_variant" | "weakness_analysis" | "child_summary" | "study_path"
+  capability: "chat" | "similar_question" | "grading_assist" | "lesson_content" | "question_variant" | "weakness_analysis" | "child_summary" | "study_path" | "explain_error"
   providerId?: string
   model?: string
   success: boolean
@@ -23,6 +23,7 @@ const AI_EVENT_MAP: Record<AiUsageEvent["capability"], EventName> = {
   weakness_analysis: "ai.weakness_analysis",
   child_summary: "ai.child_summary",
   study_path: "ai.study_path",
+  explain_error: "ai.explain_error",
 }
 
 /**