feat(v3): restructure project + add complete frontend

- Restructure: move backend from new_project/ to backend/
- Add full React/TypeScript frontend (37 pages, 17 services, 16 type defs, 11 query hooks)
- Add docs/ with SRS specs, user stories, and workflow documentation
- Update .gitignore for new directory layout

Workflows implemented:
  WF1 User Signup, WF2 Placement Test, WF3 Exam Configuration,
  WF4 General English Exam, WF5 Course Generation,
  WF6 Entity Student Onboarding, AI Course Generation,
  Adaptive Learning Engine UI, White-Label Branding, Score Release

Made-with: Cursor

frontend/src/services/coaching.service.ts

@@ -0,0 +1,28 @@
+import { api } from "@/lib/api-client";
+import type { AiChatRequest, AiChatResponse, AiTip } from "@/types";
+
+export const coachingService = {
+  async chat(data: AiChatRequest): Promise<AiChatResponse> {
+    return api.post<AiChatResponse>("/coach/chat", data);
+  },
+
+  async getHint(data: { topic_id: number; question_id: string }): Promise<{ hint: string }> {
+    return api.post("/coach/hint", data);
+  },
+
+  async explain(data: { context: string; scores?: Record<string, number> }): Promise<{ explanation: string }> {
+    return api.post("/coach/explain", data);
+  },
+
+  async suggest(data?: { subject_id?: number }): Promise<{ suggestions: string[]; study_plan_tips: string[] }> {
+    return api.post("/coach/suggest", data);
+  },
+
+  async writingHelp(data: { text: string; task_type: string }): Promise<{ feedback: string; improved: string; grammar_notes: string[] }> {
+    return api.post("/coach/writing-help", data);
+  },
+
+  async getTip(context: string): Promise<AiTip> {
+    return api.get<AiTip>("/coach/tip", { context });
+  },
+};