Separate employee and client feedback with multi-workspace support

Description: As an organization admin, I want to create distinct feedback channels for internal employees and external clients, and enable feedback across multiple workspaces, so that submissions are properly segmented, secure, and actionable at both workspace and org levels. Problem: Today, employee and client feedback is mixed in the same channel and/or workspace, causing noise, privacy risks, and permission conflicts. Organizations with multiple business units or client accounts need workspace-level isolation, but also centralized visibility. The lack of audience-specific channels and multi-workspace support makes it hard to control access, route feedback appropriately, and report accurately. Benefit: Clear audience segmentation improves relevance and trust, ensures data privacy, and enables granular permissions and reporting. Multi-workspace support scales to complex org structures, allowing each workspace to manage its own channels while giving admins cross-workspace insights. This reduces operational overhead, accelerates response times, and improves the quality of product decisions.