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

next.config.ts

@@ -1,6 +1,7 @@
 import type { NextConfig } from "next";
 
 const nextConfig: NextConfig = {
+  output: "standalone",
   reactStrictMode: true,
 };