New session creation page, + button on History

- /history/new: compose first message, creates web session, sends, redirects
- POST /api/sessions proxy route
- History page gets + button in header

app/api/sessions/route.ts

@@ -0,0 +1,21 @@
+import { NextRequest, NextResponse } from "next/server";
+
+const BACKEND = process.env.HERMES_BACKEND_URL || "http://127.0.0.1:8643";
+
+export async function POST(req: NextRequest) {
+  const body = await req.text();
+  try {
+    const res = await fetch(BACKEND + "/api/sessions", {
+      method: "POST",
+      headers: { "Content-Type": "application/json" },
+      body,
+    });
+    const data = await res.text();
+    return new NextResponse(data, {
+      status: res.status,
+      headers: { "content-type": "application/json" },
+    });
+  } catch {
+    return NextResponse.json({ error: "backend unreachable" }, { status: 502 });
+  }
+}

app/history/new/page.tsx

@@ -0,0 +1,76 @@
+"use client";
+
+import { useState } from "react";
+import { useRouter } from "next/navigation";
+import { ArrowLeft, Send, Loader2 } from "lucide-react";
+import Link from "next/link";
+
+export default function NewSessionPage() {
+  const router = useRouter();
+  const [message, setMessage] = useState("");
+  const [sending, setSending] = useState(false);
+
+  const create = async () => {
+    if (!message.trim() || sending) return;
+    setSending(true);
+    try {
+      // Create session
+      const res = await fetch("/api/sessions", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ source: "web" }),
+      });
+      const data = await res.json();
+      const sessionId = data.session?.id;
+      if (!sessionId) throw new Error("No session ID");
+
+      // Send first message
+      await fetch("/api/sessions/" + sessionId + "/chat", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ message: message.trim() }),
+      });
+
+      router.push("/history/" + sessionId);
+    } catch {
+      setSending(false);
+    }
+  };
+
+  return (
+    <div className="space-y-4">
+      <div className="flex items-center gap-3">
+        <Link href="/history" className="p-1 -ml-1 rounded-lg active:bg-white/[0.04]">
+          <ArrowLeft size={20} style={{ color: "var(--text-2)" }} />
+        </Link>
+        <h1 className="text-[15px] font-medium" style={{ color: "var(--text-1)" }}>New Session</h1>
+      </div>
+
+      <textarea
+        value={message}
+        onChange={(e) => setMessage(e.target.value)}
+        placeholder="What do you need?"
+        className="w-full min-h-[120px] p-4 rounded-2xl text-[14px] resize-none outline-none transition-colors"
+        style={{
+          background: "var(--bg-raised)",
+          border: "1px solid var(--border)",
+          color: "var(--text-1)",
+        }}
+        autoFocus
+        disabled={sending}
+      />
+
+      <button
+        onClick={create}
+        disabled={!message.trim() || sending}
+        className="btn-accent w-full flex items-center justify-center gap-2"
+      >
+        {sending ? (
+          <><Loader2 size={16} className="animate-spin" /> Creating session...</>
+        ) : (
+          <><Send size={16} /> Send</>
+        )}
+      </button>
+    </div>
+  );
+}

app/history/page.tsx

@@ -1,7 +1,8 @@
 "use client";
 
 import { useState } from "react";
-import { Search, X } from "lucide-react";
+import Link from "next/link";
+import { Search, X, Plus } from "lucide-react";
 import { useSessions, useSessionSearch } from "@/lib/hooks";
 import { SessionCard } from "@/components/SessionCard";
 
@@ -24,7 +25,16 @@ export default function HistoryPage() {
 
   return (
     <div className="space-y-4">
-      <h1 className="text-xl font-semibold" style={{ color: "var(--text-1)" }}>History</h1>
+      <div className="flex items-center justify-between">
+        <h1 className="text-xl font-semibold" style={{ color: "var(--text-1)" }}>History</h1>
+        <Link
+          href="/history/new"
+          className="p-2 rounded-xl active:scale-95 transition-all"
+          style={{ background: "var(--accent-dim)", color: "var(--accent)" }}
+        >
+          <Plus size={18} />
+        </Link>
+      </div>
 
       <div className="relative">
         <Search size={16} className="absolute left-3 top-1/2 -translate-y-1/2" style={{ color: "var(--text-3)" }} />