Scaffolda tunn vertikal slice: pnpm-monorepo (shared/daemon/server/web)

- shared: typat WebSocket-protokoll (daemon/server/web som enda sanning)
- daemon: node-pty kör agenten (default gemini), strömmar pty över WS,
  auto-reconnect; fast pty-storlek
- server: WS-mux + token-auth + session-registry + headless-xterm scrollback
  (SerializeAddon) + routing av input till rätt session
- web: Vue 3 + Vite + xterm.js, session-lista, mobil-layout och
  fallback-tangentbord (piltangenter/Enter/Esc/Tab/Ctrl-C) som skickar
  escape-sekvenser rakt till pty:n -> styr sessionen även utan hooks
- workspace: pnpm-workspace.yaml (onlyBuiltDependencies: node-pty, esbuild),
  tsconfig.base, .npmrc (retry-inställningar), .env.example

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/shared/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "@agent-helm/shared",
+  "version": "0.0.0",
+  "private": true,
+  "type": "module",
+  "main": "./src/index.ts",
+  "types": "./src/index.ts",
+  "exports": {
+    ".": "./src/index.ts"
+  },
+  "scripts": {
+    "build": "tsc --noEmit -p tsconfig.json",
+    "typecheck": "tsc --noEmit -p tsconfig.json"
+  },
+  "devDependencies": {
+    "typescript": "^5.7.0"
+  }
+}