feat: Initial Diabetix application commit

- Add authentication with NextAuth v5 (credentials + email verification)
- Implement dashboard with glycemia tracking and AI analysis
- Add PDF report generation for Premium users
- Implement Stripe integration for Premium subscriptions
- Add responsive UI with Tailwind CSS and shadcn components
- Database schema with Prisma ORM and PostgreSQL support
- Real-time glycemia visualization with Recharts
- Mobile-optimized entry form
- User profile management with medical information
- Subscription lifecycle management (create, cancel, webhook)
- Email notifications with Resend
- Feature gates for Free vs Premium plans

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/app/auth/login/LoginForm.tsx

@@ -0,0 +1,117 @@
+"use client";
+
+import { useState } from "react";
+import { signIn } from "next-auth/react";
+import { useRouter, useSearchParams } from "next/navigation";
+import Link from "next/link";
+import { Loader2, Eye, EyeOff } from "lucide-react";
+
+export function LoginForm() {
+  const router = useRouter();
+  const params = useSearchParams();
+  const verified = params.get("verified") === "1";
+  const errorParam = params.get("error");
+
+  const [email, setEmail] = useState("");
+  const [password, setPassword] = useState("");
+  const [showPwd, setShowPwd] = useState(false);
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault();
+    setError(null);
+    setLoading(true);
+
+    const result = await signIn("credentials", {
+      email: email.trim().toLowerCase(),
+      password,
+      redirect: false,
+    });
+
+    if (result?.error) {
+      setError("Email ou mot de passe incorrect.");
+      setLoading(false);
+      return;
+    }
+
+    router.push("/dashboard");
+    router.refresh();
+  }
+
+  return (
+    <div className="rounded-2xl border border-slate-200 bg-white p-8 shadow-sm">
+      {verified && (
+        <div className="mb-4 rounded-lg border border-emerald-300 bg-emerald-50 px-4 py-3 text-sm text-emerald-800">
+          ✅ Email confirmé ! Vous pouvez vous connecter.
+        </div>
+      )}
+      {errorParam === "token_expired" && (
+        <div className="mb-4 rounded-lg border border-amber-300 bg-amber-50 px-4 py-3 text-sm text-amber-800">
+          ⚠️ Lien expiré. Inscrivez-vous à nouveau.
+        </div>
+      )}
+
+      <form onSubmit={handleSubmit} className="space-y-4">
+        <div>
+          <label className="mb-1.5 block text-sm font-medium text-slate-700">Email</label>
+          <input
+            type="email"
+            autoComplete="email"
+            value={email}
+            onChange={(e) => setEmail(e.target.value)}
+            required
+            className="w-full rounded-lg border border-slate-300 px-3 py-2.5 outline-none focus:border-teal-500 focus:ring-2 focus:ring-teal-200"
+            placeholder="vous@exemple.fr"
+          />
+        </div>
+
+        <div>
+          <label className="mb-1.5 block text-sm font-medium text-slate-700">
+            Mot de passe
+          </label>
+          <div className="relative">
+            <input
+              type={showPwd ? "text" : "password"}
+              autoComplete="current-password"
+              value={password}
+              onChange={(e) => setPassword(e.target.value)}
+              required
+              className="w-full rounded-lg border border-slate-300 px-3 py-2.5 pr-10 outline-none focus:border-teal-500 focus:ring-2 focus:ring-teal-200"
+              placeholder="••••••••"
+            />
+            <button
+              type="button"
+              onClick={() => setShowPwd((v) => !v)}
+              className="absolute right-3 top-1/2 -translate-y-1/2 text-slate-400 hover:text-slate-600"
+            >
+              {showPwd ? <EyeOff className="h-4 w-4" /> : <Eye className="h-4 w-4" />}
+            </button>
+          </div>
+        </div>
+
+        {error && (
+          <div className="rounded-lg border border-rose-300 bg-rose-50 px-3 py-2 text-sm text-rose-800">
+            {error}
+          </div>
+        )}
+
+        <button
+          type="submit"
+          disabled={loading}
+          className="flex w-full items-center justify-center gap-2 rounded-lg bg-teal-600 py-2.5 text-sm font-semibold text-white hover:bg-teal-700 disabled:opacity-60"
+        >
+          {loading && <Loader2 className="h-4 w-4 animate-spin" />}
+          Se connecter
+        </button>
+      </form>
+
+      <p className="mt-6 text-center text-sm text-slate-500">
+        Pas encore de compte ?{" "}
+        <Link href="/auth/register" className="font-medium text-teal-700 hover:underline">
+          S'inscrire gratuitement
+        </Link>
+      </p>
+    </div>
+  );
+}