Visual redesign, message input, reversed messages, systemd service

- New visual identity: solid dark cards, purple accent, iOS-like feel
- Session replay: newest messages first, message input with send button
- Chat proxy route for sending messages to sessions
- systemd user service with deploy script
- All pages restyled: Pulse, Memory, History, Skills, Cron, Soul, Config

app/api/sessions/[id]/chat/route.ts

@@ -0,0 +1,22 @@
+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, { params }: { params: Promise<{ id: string }> }) {
+  const { id } = await params;
+  const body = await req.json();
+  try {
+    const res = await fetch(BACKEND + "/api/sessions/" + id + "/chat", {
+      method: "POST",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify(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 });
+  }
+}