Permission badge/tooltip on sidebar nav items

**As a** user
**I want** to hover over a sidebar item and see a tooltip explaining what actions I can perform in that module
**So that** I understand my capabilities without navigating into the module

**Acceptance Criteria:**
- [ ] Hovering "Clients" shows: "You can: View clients, Create clients"
- [ ] Hovering restricted item shows: "Contact admin to request: CREATE_LOAN"
- [ ] Tooltip dynamically computed from user's current permissions

Also need Playrwrite Tests

Start by locating the Angular sidebar navigation and the existing user-permission handling, then identify how the Clients and restricted items are rendered. Add permission-based hover tooltip behavior matching the acceptance criteria and cover the visible messages and dynamic permissions with Playwright tests.

Written by the indexing model from the issue text.