fix(team): resolve TypeScript errors in team collaboration module

- Remove unused imports and variables in Team components
- Fix CollaborationEvent type import in useTeamEvents
- Add proper type guards for Hand status in gatewayStore
- Fix Session status type compatibility in gateway-client
- Remove unused getGatewayClient import from teamStore
- Handle unknown payload types in TeamCollaborationView

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

desktop/src/components/DevQALoop.tsx

@@ -7,11 +7,11 @@
  * @module components/DevQALoop
  */
 
-import { useState, useEffect } from 'react';
+import { useState } from 'react';
 import { useTeamStore } from '../store/teamStore';
 import type { DevQALoop as DevQALoopType, ReviewFeedback, ReviewIssue } from '../types/team';
 import {
-  RefreshCw, CheckCircle, XCircle, AlertTriangle, ArrowRight,
+  RefreshCw, CheckCircle, XCircle, AlertTriangle,
   Clock, MessageSquare, FileCode, Bug, Lightbulb, ChevronDown, ChevronUp,
   Send, ThumbsUp, ThumbsDown, AlertOctagon,
 } from 'lucide-react';
@@ -126,7 +126,7 @@ interface ReviewFormProps {
   onCancel: () => void;
 }
 
-function ReviewForm({ loopId, teamId, onSubmit, onCancel }: ReviewFormProps) {
+function ReviewForm({ loopId: _loopId, teamId: _teamId, onSubmit, onCancel }: ReviewFormProps) {
   const [verdict, setVerdict] = useState<ReviewFeedback['verdict']>('needs_work');
   const [comment, setComment] = useState('');
   const [issues, setIssues] = useState<ReviewIssue[]>([]);
@@ -316,10 +316,6 @@ export function DevQALoopPanel({ loop, teamId, developerName, reviewerName, task
     setShowReviewForm(false);
   };
 
-  const handleStartRevising = async () => {
-    await updateLoopState(teamId, loop.id, 'revising');
-  };
-
   const handleCompleteRevision = async () => {
     await updateLoopState(teamId, loop.id, 'reviewing');
   };