feat: UX improvement

- Added "Add Sources" button in ChatInputGroup for easier document management.
- Introduced a "Manage Team" card in CompletionStep to facilitate team collaboration.
- Updated UI elements for better visual feedback and interaction.
- Removed unused role examples in LLMRoleManager for cleaner code.

surfsense_web/components/settings/llm-role-manager.tsx

@@ -413,19 +413,6 @@ export function LLMRoleManager({ searchSpaceId }: LLMRoleManagerProps) {
 												</div>
 											</CardHeader>
 											<CardContent className="space-y-4">
-												<div className="space-y-2">
-													<div className="text-sm text-muted-foreground">
-														<strong>Use cases:</strong> {role.examples}
-													</div>
-													<div className="flex flex-wrap gap-1">
-														{role.characteristics.map((char, idx) => (
-															<Badge key={idx} variant="outline" className="text-xs">
-																{char}
-															</Badge>
-														))}
-													</div>
-												</div>
-
 												<div className="space-y-2">
 													<Label className="text-sm font-medium">Assign LLM Configuration:</Label>
 													<Select