feat(settings): clean academic setup buttons and rename screen to Academic & Class Management

- Update screen, settings card, and dashboard titles to 'Academic & Class Management'

- Clean and balance Academic Structure toolbar for mobile and desktop

- Remove redundant buttons on section cards in favor of interactive adviser chip

- Modernize teacher action button to OutlinedButton.icon 'Sections'

- Add responsive bulk academic structure import support across backend and frontend

backend/src/controllers/setupController.js

@@ -193,9 +193,14 @@ exports.deleteAcademicYear = (req, res) => {
 exports.getAllSections = (req, res) => {
     try {
         const sections = db.prepare(`
-            SELECT s.*, ay.year_range as academic_year_range
+            SELECT s.*, ay.year_range as academic_year_range,
+                   ts.teacher_id,
+                   u.first_name as teacher_first_name,
+                   u.last_name as teacher_last_name
             FROM sections s
             LEFT JOIN academic_years ay ON s.academic_year_id = ay.id
+            LEFT JOIN teacher_sections ts ON s.id = ts.section_id
+            LEFT JOIN users u ON ts.teacher_id = u.id
             ORDER BY ay.year_range DESC, s.grade_level ASC, s.name ASC
         `).all();
         res.json(sections);
@@ -206,7 +211,18 @@ exports.getAllSections = (req, res) => {
 
 exports.getSectionsByYear = (req, res) => {
     try {
-        const sections = db.prepare('SELECT * FROM sections WHERE academic_year_id = ? ORDER BY grade_level ASC, name ASC').all(req.params.yearId);
+        const sections = db.prepare(`
+            SELECT s.*, ay.year_range as academic_year_range,
+                   ts.teacher_id,
+                   u.first_name as teacher_first_name,
+                   u.last_name as teacher_last_name
+            FROM sections s
+            LEFT JOIN academic_years ay ON s.academic_year_id = ay.id
+            LEFT JOIN teacher_sections ts ON s.id = ts.section_id
+            LEFT JOIN users u ON ts.teacher_id = u.id
+            WHERE s.academic_year_id = ?
+            ORDER BY s.grade_level ASC, s.name ASC
+        `).all(req.params.yearId);
         res.json(sections);
     } catch (error) {
         res.status(500).json({ message: 'Failed to fetch sections', error: error.message });
@@ -214,14 +230,21 @@ exports.getSectionsByYear = (req, res) => {
 };
 
 exports.createSection = (req, res) => {
-    const { name, gradeLevel, academicYearId } = req.body;
+    const { name, gradeLevel, academicYearId, teacherId } = req.body;
     if (!name || !name.trim() || !gradeLevel || !academicYearId) {
         return res.status(400).json({ message: 'name, gradeLevel, and academicYearId are required' });
     }
     try {
+        let sectionId;
+        db.transaction(() => {
             const result = db.prepare('INSERT INTO sections (name, grade_level, academic_year_id) VALUES (?, ?, ?)')
                 .run(name.trim(), gradeLevel, academicYearId);
-        res.status(201).json({ id: result.lastInsertRowid, message: 'Section created successfully' });
+            sectionId = result.lastInsertRowid;
+            if (teacherId) {
+                db.prepare('INSERT INTO teacher_sections (teacher_id, section_id) VALUES (?, ?)').run(teacherId, sectionId);
+            }
+        })();
+        res.status(201).json({ id: sectionId, message: 'Section created successfully' });
     } catch (error) {
         res.status(500).json({ message: 'Failed to create section', error: error.message });
     }
@@ -229,7 +252,7 @@ exports.createSection = (req, res) => {
 
 exports.updateSection = (req, res) => {
     const { id } = req.params;
-    const { name, gradeLevel, academicYearId } = req.body;
+    const { name, gradeLevel, academicYearId, teacherId } = req.body;
 
     if (!name || !name.trim() || !gradeLevel || !academicYearId) {
         return res.status(400).json({ message: 'name, gradeLevel, and academicYearId are required' });
@@ -239,14 +262,41 @@ exports.updateSection = (req, res) => {
         const section = db.prepare('SELECT id FROM sections WHERE id = ?').get(id);
         if (!section) return res.status(404).json({ message: 'Section not found' });
 
+        db.transaction(() => {
             db.prepare('UPDATE sections SET name = ?, grade_level = ?, academic_year_id = ? WHERE id = ?')
                 .run(name.trim(), gradeLevel, academicYearId, id);
+            if (teacherId !== undefined) {
+                db.prepare('DELETE FROM teacher_sections WHERE section_id = ?').run(id);
+                if (teacherId) {
+                    db.prepare('INSERT INTO teacher_sections (teacher_id, section_id) VALUES (?, ?)').run(teacherId, id);
+                }
+            }
+        })();
         res.json({ message: 'Section updated successfully' });
     } catch (error) {
         res.status(500).json({ message: 'Failed to update section', error: error.message });
     }
 };
 
+exports.setSectionAdviser = (req, res) => {
+    const { id } = req.params;
+    const { teacherId } = req.body;
+    try {
+        const section = db.prepare('SELECT id FROM sections WHERE id = ?').get(id);
+        if (!section) return res.status(404).json({ message: 'Section not found' });
+
+        db.transaction(() => {
+            db.prepare('DELETE FROM teacher_sections WHERE section_id = ?').run(id);
+            if (teacherId) {
+                db.prepare('INSERT INTO teacher_sections (teacher_id, section_id) VALUES (?, ?)').run(teacherId, id);
+            }
+        })();
+        res.json({ message: 'Section adviser updated successfully' });
+    } catch (error) {
+        res.status(500).json({ message: 'Failed to update section adviser', error: error.message });
+    }
+};
+
 exports.deleteSection = (req, res) => {
     const { id } = req.params;
     try {

backend/src/routes/setup.js

@@ -21,6 +21,7 @@ router.get('/academic-years/:yearId/sections', authenticateToken, setupControlle
 router.post('/sections', authenticateToken, authorizeRoles('admin'), setupController.createSection);
 router.post('/bulk-academic-structure', authenticateToken, authorizeRoles('admin'), setupController.bulkCreateAcademicStructure);
 router.put('/sections/:id', authenticateToken, authorizeRoles('admin'), setupController.updateSection);
+router.put('/sections/:id/adviser', authenticateToken, authorizeRoles('admin'), setupController.setSectionAdviser);
 router.delete('/sections/:id', authenticateToken, authorizeRoles('admin'), setupController.deleteSection);
 
 // ==========================================

frontend/lib/domain/entities/setup_models.dart

@@ -30,6 +30,16 @@ class SectionModel {
   final int gradeLevel;
   final int? academicYearId;
   final String? academicYearRange;
+  final int? teacherId;
+  final String? teacherFirstName;
+  final String? teacherLastName;
+
+  String? get teacherFullName {
+    if (teacherLastName != null && teacherFirstName != null) {
+      return '$teacherLastName, $teacherFirstName';
+    }
+    return teacherFirstName ?? teacherLastName;
+  }
 
   SectionModel({
     required this.id,
@@ -37,6 +47,9 @@ class SectionModel {
     required this.gradeLevel,
     this.academicYearId,
     this.academicYearRange,
+    this.teacherId,
+    this.teacherFirstName,
+    this.teacherLastName,
   });
 
   factory SectionModel.fromJson(Map<String, dynamic> json) {
@@ -48,6 +61,11 @@ class SectionModel {
           ? (json['academic_year_id'] as num).toInt()
           : null,
       academicYearRange: json['academic_year_range'] as String?,
+      teacherId: json['teacher_id'] != null
+          ? (json['teacher_id'] as num).toInt()
+          : null,
+      teacherFirstName: json['teacher_first_name'] as String?,
+      teacherLastName: json['teacher_last_name'] as String?,
     );
   }
 }

frontend/lib/domain/repositories/setup_repository.dart

@@ -167,6 +167,7 @@ class SetupRepository {
     required String name,
     required int gradeLevel,
     required int academicYearId,
+    int? teacherId,
   }) async {
     try {
       final options = await _getAuthOptions();
@@ -177,6 +178,7 @@ class SetupRepository {
           'name': name,
           'gradeLevel': gradeLevel,
           'academicYearId': academicYearId,
+          if (teacherId != null) 'teacherId': teacherId,
         },
       );
     } on DioException catch (e) {
@@ -208,6 +210,7 @@ class SetupRepository {
     required String name,
     required int gradeLevel,
     required int academicYearId,
+    int? teacherId,
   }) async {
     try {
       final options = await _getAuthOptions();
@@ -218,6 +221,7 @@ class SetupRepository {
           'name': name,
           'gradeLevel': gradeLevel,
           'academicYearId': academicYearId,
+          'teacherId': teacherId,
         },
       );
     } on DioException catch (e) {
@@ -225,6 +229,22 @@ class SetupRepository {
     }
   }
 
+  Future<void> setSectionAdviser({
+    required int sectionId,
+    int? teacherId,
+  }) async {
+    try {
+      final options = await _getAuthOptions();
+      await _dio.put(
+        '/setup/sections/$sectionId/adviser',
+        options: options,
+        data: {'teacherId': teacherId},
+      );
+    } on DioException catch (e) {
+      throw Exception(_extractErrorMessage(e, 'Failed to update section adviser.'));
+    }
+  }
+
   Future<void> deleteSection(int id) async {
     try {
       final options = await _getAuthOptions();

frontend/lib/ui/providers/setup_provider.dart

@@ -3,6 +3,7 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../domain/entities/setup_models.dart';
 import '../../domain/repositories/setup_repository.dart';
 import 'auth_provider.dart';
+import 'users_provider.dart';
 
 final setupRepositoryProvider = Provider<SetupRepository>((ref) {
   return SetupRepository();
@@ -134,6 +135,7 @@ class SetupMutationNotifier extends AsyncNotifier<void> {
     required String name,
     required int gradeLevel,
     required int academicYearId,
+    int? teacherId,
   }) async {
     state = const AsyncLoading();
     try {
@@ -142,9 +144,11 @@ class SetupMutationNotifier extends AsyncNotifier<void> {
         name: name,
         gradeLevel: gradeLevel,
         academicYearId: academicYearId,
+        teacherId: teacherId,
       );
       state = const AsyncData(null);
       ref.invalidate(sectionsListProvider);
+      ref.invalidate(usersProvider);
     } catch (e, st) {
       state = AsyncError(e, st);
       rethrow;
@@ -162,6 +166,7 @@ class SetupMutationNotifier extends AsyncNotifier<void> {
       ref.invalidate(academicYearsListProvider);
       ref.invalidate(gradeLevelsListProvider);
       ref.invalidate(sectionsListProvider);
+      ref.invalidate(usersProvider);
       return res;
     } catch (e, st) {
       state = AsyncError(e, st);
@@ -174,6 +179,7 @@ class SetupMutationNotifier extends AsyncNotifier<void> {
     required String name,
     required int gradeLevel,
     required int academicYearId,
+    int? teacherId,
   }) async {
     state = const AsyncLoading();
     try {
@@ -183,9 +189,28 @@ class SetupMutationNotifier extends AsyncNotifier<void> {
         name: name,
         gradeLevel: gradeLevel,
         academicYearId: academicYearId,
+        teacherId: teacherId,
       );
       state = const AsyncData(null);
       ref.invalidate(sectionsListProvider);
+      ref.invalidate(usersProvider);
+    } catch (e, st) {
+      state = AsyncError(e, st);
+      rethrow;
+    }
+  }
+
+  Future<void> setSectionAdviser({
+    required int sectionId,
+    int? teacherId,
+  }) async {
+    state = const AsyncLoading();
+    try {
+      final repo = ref.read(setupRepositoryProvider);
+      await repo.setSectionAdviser(sectionId: sectionId, teacherId: teacherId);
+      state = const AsyncData(null);
+      ref.invalidate(sectionsListProvider);
+      ref.invalidate(usersProvider);
     } catch (e, st) {
       state = AsyncError(e, st);
       rethrow;

frontend/lib/ui/screens/dashboard/dashboard_screen.dart

@@ -571,8 +571,8 @@ class _DashboardScreenState extends ConsumerState<DashboardScreen> {
                         children: [
                           _setupNavButton(
                             context,
-                            icon: Icons.people_outline,
-                            label: 'Teachers & Academic Setup',
+                            icon: Icons.school_outlined,
+                            label: 'Academic & Class Management',
                             isMobile: true,
                             onTap: () => TeacherManagementModal.open(context),
                           ),
@@ -626,8 +626,8 @@ class _DashboardScreenState extends ConsumerState<DashboardScreen> {
                               children: [
                                 _setupNavButton(
                                   context,
-                                  icon: Icons.people_outline,
-                                  label: 'Teachers & Academic Setup',
+                                  icon: Icons.school_outlined,
+                                  label: 'Academic & Class Management',
                                   onTap: () =>
                                       TeacherManagementModal.open(context),
                                 ),

frontend/lib/ui/screens/settings/settings_screen.dart

@@ -990,7 +990,7 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
                                 const Row(
                                   children: [
                                     Icon(
-                                      Icons.people_alt,
+                                      Icons.school_outlined,
                                       color: AppColors.primaryGreen,
                                     ),
                                     SizedBox(width: AppSizes.p8),
@@ -1000,14 +1000,14 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
                                             CrossAxisAlignment.start,
                                         children: [
                                           Text(
-                                            'Teachers & Academic Setup',
+                                            'Academic & Class Management',
                                             style: TextStyle(
                                               fontSize: 18,
                                               fontWeight: FontWeight.bold,
                                             ),
                                           ),
                                           Text(
-                                            'Manage teachers, academic years, grade levels, and sections',
+                                            'Manage academic years, sections, and class advisers',
                                             style: TextStyle(
                                               fontSize: 13,
                                               color: Colors.grey,
@@ -1112,7 +1112,7 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
                                       );
                                       if (years.isEmpty) {
                                         return const Text(
-                                          'No academic years found. Configure an academic year in Teachers & Academic Setup first.',
+                                          'No academic years found. Configure an academic year in Academic & Class Management first.',
                                           style: TextStyle(color: AppColors.warning, fontSize: 13),
                                         );
                                       }
@@ -1129,7 +1129,7 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
                                                 border: Border.all(color: AppColors.warning.withValues(alpha: 0.3)),
                                               ),
                                               child: const Text(
-                                                'No active academic year found. An administrator must activate a school year in Teachers & Academic Setup.',
+                                                'No active academic year found. An administrator must activate a school year in Academic & Class Management.',
                                                 style: TextStyle(color: AppColors.warning, fontSize: 13),
                                               ),
                                             ),