fix(frontend): align project types with backend enums

- Fix ProjectStatus: use 'active' instead of 'in_progress'
- Fix AgentStatus: remove 'active'/'pending'/'error', add 'waiting'
- Fix SprintStatus: add 'in_review'
- Rename IssueSummary to IssueCountSummary
- Update all components to use correct enum values

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/components/projects/AgentPanel.tsx

@@ -126,7 +126,7 @@ function AgentListItem({
               <DropdownMenuItem onClick={() => onAction(agent.id, 'view')}>
                 View Details
               </DropdownMenuItem>
-              {agent.status === 'active' || agent.status === 'working' ? (
+              {agent.status === 'working' || agent.status === 'waiting' ? (
                 <DropdownMenuItem onClick={() => onAction(agent.id, 'pause')}>
                   Pause Agent
                 </DropdownMenuItem>
@@ -196,7 +196,7 @@ export function AgentPanel({
   }
 
   const activeAgentCount = agents.filter(
-    (a) => a.status === 'active' || a.status === 'working'
+    (a) => a.status === 'working' || a.status === 'waiting'
   ).length;
 
   return (