fix: remove middleware and route groups to fix Vercel deployment

- Remove middleware.ts entirely (caused __dirname ReferenceError in Edge)
- Auth protection handled by dashboard layout.tsx (server-side redirect)
- Move pages out of (marketing) and (auth) route groups to fix 404 on /
- Keep (protected) route group for dashboard/formations/profil shared layout

https://claude.ai/code/session_01H2aRGDaKgarPvhay2HxN6Y

app/login/page.tsx

@@ -0,0 +1,116 @@
+"use client";
+
+import { useState } from "react";
+import Link from "next/link";
+import { useRouter } from "next/navigation";
+import { createClient } from "@/lib/supabase/client";
+import Button from "@/components/ui/Button";
+import Input from "@/components/ui/Input";
+
+export default function LoginPage() {
+  const router = useRouter();
+  const [email, setEmail] = useState("");
+  const [password, setPassword] = useState("");
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const handleLogin = async (e: React.FormEvent) => {
+    e.preventDefault();
+    setLoading(true);
+    setError(null);
+
+    try {
+      const supabase = createClient();
+      const { error: authError } = await supabase.auth.signInWithPassword({
+        email,
+        password,
+      });
+
+      if (authError) {
+        if (authError.message.includes("Invalid login credentials")) {
+          setError("Email ou mot de passe incorrect.");
+        } else {
+          setError(authError.message);
+        }
+        return;
+      }
+
+      router.push("/dashboard");
+      router.refresh();
+    } catch {
+      setError("Erreur de connexion. Veuillez reessayer.");
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  return (
+    <main className="min-h-screen flex items-center justify-center px-4">
+      <div className="w-full max-w-md">
+        {/* Logo */}
+        <div className="text-center mb-8">
+          <Link href="/" className="inline-flex items-center gap-2 mb-6">
+            <div className="w-10 h-10 gradient-bg rounded-xl flex items-center justify-center">
+              <span className="text-white font-bold">H</span>
+            </div>
+            <span className="text-2xl font-bold text-white">
+              Hook<span className="gradient-text">Lab</span>
+            </span>
+          </Link>
+          <h1 className="text-2xl font-bold text-white mb-2">
+            Content de te revoir
+          </h1>
+          <p className="text-white/60 text-sm">
+            Connecte-toi pour acceder a tes formations.
+          </p>
+        </div>
+
+        {/* Form */}
+        <div className="bg-dark-light border border-dark-border rounded-[20px] p-6 md:p-8">
+          <form onSubmit={handleLogin} className="space-y-5">
+            <Input
+              id="email"
+              label="Email"
+              type="email"
+              placeholder="ton@email.com"
+              value={email}
+              onChange={(e) => setEmail(e.target.value)}
+              required
+            />
+            <Input
+              id="password"
+              label="Mot de passe"
+              type="password"
+              placeholder="Ton mot de passe"
+              value={password}
+              onChange={(e) => setPassword(e.target.value)}
+              required
+            />
+
+            {error && (
+              <div className="p-3 bg-error/10 border border-error/20 rounded-xl">
+                <p className="text-error text-sm">{error}</p>
+              </div>
+            )}
+
+            <Button type="submit" loading={loading} className="w-full">
+              Se connecter
+            </Button>
+          </form>
+
+          <div className="mt-6 text-center">
+            <p className="text-white/40 text-sm">
+              Pas encore de compte ?{" "}
+              <Link
+                href="/candidature"
+                className="text-primary hover:text-primary-hover transition-colors"
+              >
+                Candidater
+              </Link>
+            </p>
+          </div>
+        </div>
+      </div>
+    </main>
+  );
+}