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/components/ai/AiAssistantDrawer.tsx

@@ -0,0 +1,139 @@
+import { useState } from "react";
+import { useMutation } from "@tanstack/react-query";
+import { useLocation } from "react-router-dom";
+import { Sheet, SheetContent, SheetHeader, SheetTitle } from "@/components/ui/sheet";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Sparkles, Send, Loader2 } from "lucide-react";
+import { coachingService } from "@/services/coaching.service";
+import { useToast } from "@/hooks/use-toast";
+
+const quickActions = [
+  "Platform health summary",
+  "Show dropout risks",
+  "Compare course performance",
+  "Suggest batch improvements",
+];
+
+export default function AiAssistantDrawer() {
+  const [open, setOpen] = useState(false);
+  const [messages, setMessages] = useState<{ role: "user" | "ai"; text: string }[]>([]);
+  const [input, setInput] = useState("");
+  const location = useLocation();
+  const { toast } = useToast();
+
+  const chatMutation = useMutation({
+    mutationFn: (message: string) =>
+      coachingService.chat({ message, context: { page: location.pathname } }),
+    onSuccess: (data) => {
+      setMessages((prev) => [...prev, { role: "ai", text: data.message }]);
+    },
+    onError: (err: Error) => {
+      toast({
+        variant: "destructive",
+        title: "Could not get a reply",
+        description: err.message || "Something went wrong. Try again.",
+      });
+      setMessages((prev) => [
+        ...prev,
+        {
+          role: "ai",
+          text: "Sorry, I could not reach the assistant. Please try again in a moment.",
+        },
+      ]);
+    },
+  });
+
+  const handleSend = (text: string) => {
+    if (!text.trim() || chatMutation.isPending) return;
+    const userMsg = text.trim();
+    setMessages((prev) => [...prev, { role: "user", text: userMsg }]);
+    setInput("");
+    chatMutation.mutate(userMsg);
+  };
+
+  return (
+    <>
+      <button
+        onClick={() => setOpen(true)}
+        className="fixed bottom-20 right-6 z-50 flex h-12 w-12 items-center justify-center rounded-full bg-primary text-primary-foreground shadow-lg hover:opacity-90 transition-opacity"
+        aria-label="AI Assistant"
+      >
+        <Sparkles className="h-5 w-5" />
+      </button>
+
+      <Sheet open={open} onOpenChange={setOpen}>
+        <SheetContent className="w-[400px] sm:w-[440px] flex flex-col">
+          <SheetHeader>
+            <SheetTitle className="flex items-center gap-2">
+              <Sparkles className="h-5 w-5 text-primary" />
+              EnCoach AI Assistant
+            </SheetTitle>
+          </SheetHeader>
+
+          <div className="flex flex-wrap gap-2 mt-4">
+            {quickActions.map((action) => (
+              <Button
+                key={action}
+                variant="outline"
+                size="sm"
+                className="text-xs"
+                disabled={chatMutation.isPending}
+                onClick={() => handleSend(action)}
+              >
+                {action}
+              </Button>
+            ))}
+          </div>
+
+          <div className="flex-1 overflow-y-auto mt-4 space-y-3 min-h-0">
+            {messages.length === 0 && (
+              <div className="text-center text-muted-foreground text-sm py-8">
+                <Sparkles className="h-8 w-8 mx-auto mb-3 text-primary/40" />
+                <p>Ask me anything about the platform,</p>
+                <p>or click a quick action above.</p>
+              </div>
+            )}
+            {messages.map((msg, i) => (
+              <div
+                key={i}
+                className={`rounded-lg p-3 text-sm ${
+                  msg.role === "user"
+                    ? "bg-primary text-primary-foreground ml-8"
+                    : "bg-muted mr-8"
+                }`}
+              >
+                {msg.role === "ai" && (
+                  <Sparkles className="h-3 w-3 text-primary inline mr-1.5 -mt-0.5" />
+                )}
+                {msg.text}
+              </div>
+            ))}
+            {chatMutation.isPending && (
+              <div className="bg-muted rounded-lg p-3 text-sm mr-8 flex items-center gap-2">
+                <Loader2 className="h-4 w-4 animate-spin text-primary" />
+                <span className="text-muted-foreground">Thinking...</span>
+              </div>
+            )}
+          </div>
+
+          <div className="flex gap-2 pt-3 border-t mt-auto">
+            <Input
+              placeholder="Ask anything..."
+              value={input}
+              onChange={(e) => setInput(e.target.value)}
+              onKeyDown={(e) => e.key === "Enter" && handleSend(input)}
+            />
+            <Button
+              size="icon"
+              onClick={() => handleSend(input)}
+              disabled={!input.trim() || chatMutation.isPending}
+            >
+              <Send className="h-4 w-4" />
+            </Button>
+          </div>
+        </SheetContent>
+      </Sheet>
+    </>
+  );
+}