feat: initial frontend codebase — EnCoach v3

React 18 + TypeScript + Vite 5 + Tailwind CSS + shadcn/ui frontend:
- Multi-role auth: student, teacher, admin, corporate, agent, developer
- Student portal: dashboard, courses, adaptive learning, exams, placement
- Teacher portal: courses, assignments, grading, attendance, AI workbench
- Admin portal: 60+ management pages (LMS, exams, users, entities, AI)
- AI-powered features: study coach, generation page, gap analysis, TTS
- Exam system: session, auto-save, results, grading queue
- Full IELTS workflow: reading/listening/writing/speaking modules

Made-with: Cursor

src/services/adaptive-engine.service.ts

@@ -0,0 +1,30 @@
+import { api } from "@/lib/api-client";
+import type {
+  AdaptiveDashboardMetrics,
+  AdaptiveEngineStudentRow,
+  AdaptiveThresholdSettings,
+  StudentAbilityModel,
+  StudentAdaptiveSignal,
+} from "@/types";
+import type { ApiSuccessResponse } from "@/types";
+
+export const adaptiveEngineService = {
+  getDashboard: () => api.get<AdaptiveDashboardMetrics>("/adaptive-engine/dashboard"),
+
+  getStudents: (params?: { page?: number; limit?: number }) =>
+    api.get<{ data: AdaptiveEngineStudentRow[]; pagination?: { total: number; page: number } }>(
+      "/adaptive-engine/students",
+      params as Record<string, string | number | boolean | undefined>,
+    ),
+
+  getStudentSignals: (studentId: number) =>
+    api.get<StudentAdaptiveSignal[]>(`/adaptive-engine/students/${studentId}/signals`),
+
+  getStudentAbility: (studentId: number) =>
+    api.get<StudentAbilityModel>(`/adaptive-engine/students/${studentId}/ability`),
+
+  getSettings: () => api.get<AdaptiveThresholdSettings>("/adaptive-engine/settings"),
+
+  updateSettings: (data: AdaptiveThresholdSettings) =>
+    api.put<ApiSuccessResponse>("/adaptive-engine/settings", data),
+};