feat: pivot to AI-native task management platform (#232)

Replace the agent framework codebase with a new monorepo structure
for an AI-native Linear-like product where agents are first-class citizens.

New architecture:
- server/ — Go backend (Chi + gorilla/websocket + sqlc)
  - API server with REST routes for issues, agents, inbox, workspaces
  - WebSocket hub for real-time updates
  - Local daemon entry point for agent runtime connection
  - PostgreSQL migration with 13 tables (issue, agent, inbox, etc.)
  - WebSocket protocol types for server<->daemon communication
- apps/web/ — Next.js 16 frontend
  - Dashboard layout with sidebar navigation
  - Route skeleton: inbox, issues, agents, board, settings
- packages/ui/ — Preserved shadcn/ui design system (26+ components)
- packages/types/ — Full API contract types (Issue, Agent, Workspace, Inbox, Events)
- packages/sdk/ — REST ApiClient + WebSocket WSClient
- packages/store/ — Zustand stores (issue, agent, inbox, auth)
- packages/hooks/ — React hooks (useIssues, useAgents, useInbox, useRealtime)
- packages/utils/ — Shared utilities

Removed: apps/cli, apps/desktop, apps/mobile, apps/gateway,
packages/core, skills/, and all agent-framework code.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/next.config.ts

@@ -1,22 +1,13 @@
 import type { NextConfig } from "next";
 
 const nextConfig: NextConfig = {
-  transpilePackages: ["@multica/ui", "@multica/store", "@multica/hooks", "@multica/sdk"],
-  // Removed rewrites proxy - frontend requests API directly via NEXT_PUBLIC_API_URL
-  headers: async () => [
-    {
-      source: "/sw.js",
-      headers: [
-        {
-          key: "Cache-Control",
-          value: "no-cache, no-store, must-revalidate",
-        },
-        {
-          key: "Content-Type",
-          value: "application/javascript; charset=utf-8",
-        },
-      ],
-    },
+  transpilePackages: [
+    "@multica/ui",
+    "@multica/store",
+    "@multica/hooks",
+    "@multica/sdk",
+    "@multica/types",
+    "@multica/utils",
   ],
 };