refactor: rename HAPI_BOT_URL to HAPI_SERVER_URL

The project is no longer primarily a bot - it now provides HTTP API,
Socket.IO, SSE, and web app backend services. This rename reflects the
broader scope of server functionality.

Updates references in:
- cli/src/configuration.ts (core config)
- cli/src/ui/logger.ts (remote logging)
- cli/src/ui/doctor.ts (diagnostics)
- cli/src/commands/auth.ts (auth status)
- cli/src/daemon/daemon.integration.test.ts (test comments)
- README.md (quickstart docs)
- cli/README.md (CLI docs)
- cli/CLAUDE.md (dev docs)

cli/src/daemon/daemon.integration.test.ts

@@ -11,7 +11,7 @@
  * 
  * The integration test environment uses .env.integration-test which sets:
  * - HAPI_HOME=~/.hapi-dev-test (DIFFERENT from dev's ~/.hapi-dev!)
- * - HAPI_BOT_URL=http://localhost:3006 (local hapi-server)
+ * - HAPI_SERVER_URL=http://localhost:3006 (local hapi-server)
  * - CLI_API_TOKEN=... (must match the server)
  */