Edit Issue - .issue.db

Title *

Description

Create Roles overview and management page.

Component: api/ui/templates/components/admin_roles/

Files:
- admin_roles.html
- admin_roles.css
- admin_roles.js

URL: #/admin/roles

Features:
- Grid/Card view of all 9 roles
- Each role card shows:
  - Role name with icon
  - Description
  - User count badge
  - Permission count
  - View Details button

- Role detail panel (side panel or modal):
  - Full description
  - List of all permissions grouped by category
  - Permission checkboxes (visual only, predefined roles)
  - Users with this role (paginated list)
  - Quick assign user button

Permission Categories Display:
- User Management (expandable)
- Workflow Management (expandable)
- Execution Management (expandable)
- Admin Functions (expandable)
- System Functions (expandable)

Visual:
- Color-coded role badges
- Permission icons
- Hierarchy visualization (who can assign whom)

With ultra attention to details and correctness.
Before closing: write comment summarizing implementation with screenshot.

Due Date (YYYY-MM-DD)

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Edit Issue #81