refactor: fix remaining P2 architecture issues

Fix P2-6: proxy.ts now uses Permissions constants instead of hardcoded strings

Fix P2-7: useA11yId file no longer exists (use-aria-live.ts already in hooks/)

Fix P2-8: schema.ts section numbering reordered to continuous 1-24

Fix P2-11: announcements dead code void wasPublished already removed

Fix P2-17: app-sidebar.tsx uses hasRole() instead of permission-based role inference

Fix P2-18: scheduling/actions.ts removes trailing re-export of data-access; 4 pages now import directly from data-access

Sync architecture docs 004 and 005

src/shared/db/schema.ts

@@ -418,7 +418,7 @@ export const classSchedule = mysqlTable("class_schedule", {
   }).onDelete("cascade"),
 }));
 
-// --- P2: Exam Proctoring (考试监考) ---
+// --- 7. Exam Proctoring Config (考试监考配置) ---
 
 export const examModeEnum = mysqlEnum("exam_mode", ["homework", "timed", "proctored"]);
 export const proctoringEventTypeEnum = mysqlEnum("event_type", [
@@ -650,7 +650,7 @@ export const aiProviders = mysqlTable("ai_providers", {
   defaultIdx: index("ai_provider_default_idx").on(table.isDefault),
 }));
 
-// --- 7. Announcements ---
+// --- 8. Announcements ---
 
 export const announcementTypeEnum = mysqlEnum("type", ["school", "grade", "class"]);
 export const announcementStatusEnum = mysqlEnum("status", ["draft", "published", "archived"]);
@@ -675,7 +675,7 @@ export const announcements = mysqlTable("announcements", {
   targetClassIdx: index("announcements_target_class_idx").on(table.targetClassId),
 }));
 
-// --- 8. Audit & Login Logs ---
+// --- 9. Audit & Login Logs ---
 
 export const auditLogStatusEnum = mysqlEnum("status", ["success", "failure"]);
 
@@ -721,7 +721,7 @@ export const loginLogs = mysqlTable("login_logs", {
   createdAtIdx: index("login_logs_created_at_idx").on(table.createdAt),
 }));
 
-// --- 8b. Data Change Logs (数据变更日志) ---
+// --- 10. Data Change Logs (数据变更日志) ---
 
 export const dataChangeLogActionEnum = mysqlEnum("action", ["create", "update", "delete"]);
 
@@ -749,7 +749,7 @@ export const dataChangeLogs = mysqlTable("data_change_logs", {
 // But if there were existing tables, we might keep them or comment them out.
 // For this task, I will overwrite completely as this is a "System Architect" redesign.
 
-// --- 9. Grade Records (成绩录入) ---
+// --- 11. Grade Records (成绩录入) ---
 
 export const gradeRecordTypeEnum = mysqlEnum("type", ["exam", "quiz", "homework", "other"]);
 export const gradeRecordSemesterEnum = mysqlEnum("semester", ["1", "2"]);
@@ -799,7 +799,7 @@ export const gradeRecords = mysqlTable("grade_records", {
   }).onDelete("cascade"),
 }));
 
-// --- 10. File Attachments (文件附件) ---
+// --- 12. File Attachments (文件附件) ---
 
 export const fileAttachments = mysqlTable("file_attachments", {
   id: varchar("id", { length: 128 }).primaryKey(),
@@ -819,7 +819,7 @@ export const fileAttachments = mysqlTable("file_attachments", {
   createdAtIdx: index("file_attachments_created_at_idx").on(table.createdAt),
 }));
 
-// --- 11. Course Plans (课程计划) ---
+// --- 13. Course Plans (课程计划) ---
 
 export const coursePlanStatusEnum = mysqlEnum("status", ["planning", "active", "completed", "paused"]);
 export const coursePlanSemesterEnum = mysqlEnum("semester", ["1", "2"]);
@@ -893,7 +893,7 @@ export const coursePlanItems = mysqlTable("course_plan_items", {
   }).onDelete("cascade"),
 }));
 
-// --- 13. Messages (站内消息) ---
+// --- 14. Messages (站内消息) ---
 
 export const messages = mysqlTable("messages", {
   id: id("id").primaryKey(),
@@ -913,7 +913,7 @@ export const messages = mysqlTable("messages", {
   receiverReadIdx: index("messages_receiver_read_idx").on(table.receiverId, table.isRead),
 }));
 
-// --- 14. Message Notifications (消息通知) ---
+// --- 15. Message Notifications (消息通知) ---
 
 export const messageNotifications = mysqlTable("message_notifications", {
   id: id("id").primaryKey(),
@@ -931,7 +931,7 @@ export const messageNotifications = mysqlTable("message_notifications", {
   createdAtIdx: index("message_notifications_created_at_idx").on(table.createdAt),
 }));
 
-// --- 14b. Notification Preferences (通知偏好) ---
+// --- 16. Notification Preferences (通知偏好) ---
 
 export const notificationPreferences = mysqlTable("notification_preferences", {
   id: varchar("id", { length: 128 }).primaryKey(),
@@ -955,7 +955,7 @@ export const notificationPreferences = mysqlTable("notification_preferences", {
   }).onDelete("cascade"),
 }));
 
-// --- 12. Parent-Student Relations (家长-子女关联) ---
+// --- 17. Parent-Student Relations (家长-子女关联) ---
 
 export const parentStudentRelations = mysqlTable("parent_student_relations", {
   id: varchar("id", { length: 128 }).primaryKey().$defaultFn(() => createId()),
@@ -978,7 +978,7 @@ export const parentStudentRelations = mysqlTable("parent_student_relations", {
   }).onDelete("cascade"),
 }));
 
-// --- 15. Attendance (考勤管理) ---
+// --- 18. Attendance (考勤管理) ---
 
 export const attendanceStatusEnum = mysqlEnum("status", ["present", "absent", "late", "early_leave", "excused"]);
 
@@ -1035,7 +1035,7 @@ export const attendanceRules = mysqlTable("attendance_rules", {
   }).onDelete("cascade"),
 }));
 
-// --- 17. Password Security (密码安全策略) ---
+// --- 19. Password Security (密码安全策略) ---
 
 export const passwordSecurity = mysqlTable("password_security", {
   id: varchar("id", { length: 128 }).primaryKey().$defaultFn(() => createId()),
@@ -1056,7 +1056,7 @@ export const passwordSecurity = mysqlTable("password_security", {
   }).onDelete("cascade"),
 }));
 
-// --- 16. Scheduling Rules & Schedule Changes (排课规则与调课) ---
+// --- 20. Scheduling Rules & Schedule Changes (排课规则与调课) ---
 
 export const schedulingRules = mysqlTable("scheduling_rules", {
   id: id("id").primaryKey(),
@@ -1100,7 +1100,7 @@ export const scheduleChanges = mysqlTable("schedule_changes", {
   originalScheduleIdx: index("schedule_changes_original_schedule_idx").on(table.originalScheduleId),
 }));
 
-// --- P2: Elective Course Management (选课管理) ---
+// --- 21. Elective Course Management (选课管理) ---
 
 export const electiveCourseStatusEnum = mysqlEnum("status", ["draft", "open", "closed", "cancelled"]);
 export const electiveSelectionModeEnum = mysqlEnum("selection_mode", ["fcfs", "lottery"]);
@@ -1152,7 +1152,7 @@ export const courseSelections = mysqlTable("course_selections", {
   statusIdx: index("course_selections_status_idx").on(table.status),
 }));
 
-// --- P2: Exam Proctoring (考试监考) ---
+// --- 22. Exam Proctoring Events (考试监考事件) ---
 
 export const examProctoringEvents = mysqlTable("exam_proctoring_events", {
   id: id("id").primaryKey(),
@@ -1170,7 +1170,7 @@ export const examProctoringEvents = mysqlTable("exam_proctoring_events", {
   eventTypeIdx: index("proctoring_event_type_idx").on(table.eventType),
 }));
 
-// --- P2: Learning Diagnostic (学情诊断报告) ---
+// --- 23. Learning Diagnostic (学情诊断报告) ---
 
 export const knowledgePointMastery = mysqlTable("knowledge_point_mastery", {
   id: id("id").primaryKey(),
@@ -1211,3 +1211,55 @@ export const learningDiagnosticReports = mysqlTable("learning_diagnostic_reports
   statusIdx: index("diagnostic_status_idx").on(table.status),
   reportTypeIdx: index("diagnostic_report_type_idx").on(table.reportType),
 }));
+
+// --- 24. Lesson Preparation (备课) ---
+
+export const lessonPlans = mysqlTable("lesson_plans", {
+  id: id("id").primaryKey(),
+  title: varchar("title", { length: 255 }).notNull(),
+  textbookId: varchar("textbook_id", { length: 128 }).references(() => textbooks.id),
+  chapterId: varchar("chapter_id", { length: 128 }).references(() => chapters.id),
+  coursePlanItemId: varchar("course_plan_item_id", { length: 128 }),
+  subjectId: varchar("subject_id", { length: 128 }).references(() => subjects.id),
+  gradeId: varchar("grade_id", { length: 128 }).references(() => grades.id),
+  templateId: varchar("template_id", { length: 128 }),
+  templateName: varchar("template_name", { length: 100 }),
+  content: json("content").notNull(),
+  status: varchar("status", { length: 50 }).default("draft").notNull(),
+  creatorId: varchar("creator_id", { length: 128 }).notNull().references(() => users.id),
+  lastSavedAt: timestamp("last_saved_at"),
+  createdAt: timestamp("created_at").defaultNow().notNull(),
+  updatedAt: timestamp("updated_at").defaultNow().onUpdateNow().notNull(),
+}, (table) => ({
+  creatorIdx: index("lp_creator_idx").on(table.creatorId),
+  statusIdx: index("lp_status_idx").on(table.status),
+  textbookChapterIdx: index("lp_textbook_chapter_idx").on(table.textbookId, table.chapterId),
+  subjectGradeIdx: index("lp_subject_grade_idx").on(table.subjectId, table.gradeId),
+}));
+
+export const lessonPlanVersions = mysqlTable("lesson_plan_versions", {
+  id: id("id").primaryKey(),
+  planId: varchar("plan_id", { length: 128 }).notNull().references(() => lessonPlans.id, { onDelete: "cascade" }),
+  versionNo: int("version_no").notNull(),
+  label: varchar("label", { length: 100 }),
+  content: json("content").notNull(),
+  isAuto: boolean("is_auto").default(false).notNull(),
+  creatorId: varchar("creator_id", { length: 128 }).notNull().references(() => users.id),
+  createdAt: timestamp("created_at").defaultNow().notNull(),
+}, (table) => ({
+  planVersionIdx: index("lpv_plan_version_idx").on(table.planId, table.versionNo),
+  planCreatedIdx: index("lpv_plan_created_idx").on(table.planId, table.createdAt),
+}));
+
+export const lessonPlanTemplates = mysqlTable("lesson_plan_templates", {
+  id: id("id").primaryKey(),
+  name: varchar("name", { length: 100 }).notNull(),
+  type: varchar("type", { length: 50 }).notNull(),
+  scope: varchar("scope", { length: 50 }).notNull(),
+  blocks: json("blocks").notNull(),
+  creatorId: varchar("creator_id", { length: 128 }).references(() => users.id),
+  createdAt: timestamp("created_at").defaultNow().notNull(),
+  updatedAt: timestamp("updated_at").defaultNow().onUpdateNow().notNull(),
+}, (table) => ({
+  typeCreatorIdx: index("lpt_type_creator_idx").on(table.type, table.creatorId),
+}));