fix: resolve TypeScript errors from cockpit refactor (Phase 7)

- Remove unused imports (ChatMessage, TaskLane)
- Remove unused handleTaskSubmit and handleFlowPilotAnswer
- Remove unused setActiveStepIndex setter
- Add triage fields to AISessionDetail construction in useFlowPilotSession
- npx tsc -b passes clean

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

frontend/src/hooks/useFlowPilotSession.ts

@@ -95,6 +95,11 @@ export function useFlowPilotSession(): UseFlowPilotSession {
         pending_task_lane: null,
         is_branching: false,
         active_branch_id: null,
+        client_name: null,
+        asset_name: null,
+        issue_category: null,
+        triage_hypothesis: null,
+        evidence_items: null,
       })
       setAllSteps([firstStep])
       setCurrentStep(firstStep)

frontend/src/pages/AssistantChatPage.tsx

@@ -11,8 +11,9 @@ import { useBranching } from '@/hooks/useBranching'
 import { analytics } from '@/lib/analytics'
 import { toast } from '@/lib/toast'
 import { ChatSidebar, ChatSidebarCollapsedBar } from '@/components/assistant/ChatSidebar'
-import { ChatMessage } from '@/components/assistant/ChatMessage'
-import { TaskLane } from '@/components/assistant/TaskLane'
+// ChatMessage and TaskLane kept in codebase but no longer imported here
+// import { ChatMessage } from '@/components/assistant/ChatMessage'
+// import { TaskLane } from '@/components/assistant/TaskLane'
 import { ConcludeSessionModal } from '@/components/assistant/ConcludeSessionModal'
 import { StatusUpdateModal } from '@/components/flowpilot/StatusUpdateModal'
 import { IncidentHeader } from '@/components/assistant/IncidentHeader'
@@ -83,7 +84,7 @@ export default function AssistantChatPage() {
     const saved = localStorage.getItem('rf-assistant-work-zone-height')
     return saved ? parseFloat(saved) : 55
   })
-  const [activeStepIndex, setActiveStepIndex] = useState(0)
+  const [activeStepIndex] = useState(0)
   const splitContainerRef = useRef<HTMLDivElement>(null)
   const toggleSidebarCollapse = () => {
     const next = !sidebarCollapsed
@@ -380,56 +381,6 @@ export default function AssistantChatPage() {
     }
   }
 
-  const handleTaskSubmit = async (responses: Array<{ type: string; state: string; value: string; text?: string; label?: string }>) => {
-    if (!activeChatId || loading) return
-
-    // Format task responses into a structured message for the AI
-    const parts: string[] = []
-    for (const r of responses) {
-      const name = r.type === 'question' ? `Q: ${r.text}` : r.label || 'Check'
-      if (r.state === 'done' && r.value.trim()) {
-        parts.push(`**${name}:**\n\`\`\`\n${r.value.trim()}\n\`\`\``)
-      } else if (r.state === 'skipped') {
-        parts.push(`**${name}:** _(skipped)_`)
-      }
-    }
-    const userMessage = parts.join('\n\n')
-
-    setMessages(prev => [...prev, { role: 'user', content: userMessage }])
-    setLoading(true)
-
-    try {
-      const response = await aiSessionsApi.sendChatMessage(activeChatId, { message: userMessage })
-      setMessages(prev => [
-        ...prev,
-        { role: 'assistant', content: response.content, suggestedFlows: response.suggested_flows, fork: response.fork, actions: response.actions, questions: response.questions },
-      ])
-      if (response.fork && activeChatId) {
-        branching.loadBranches(activeChatId)
-      }
-      // Update task lane based on AI response
-      const hasQuestions = response.questions && response.questions.length > 0
-      const hasActions = response.actions && response.actions.length > 0
-      if (hasQuestions || hasActions) {
-        setActiveQuestions(response.questions || [])
-        setActiveActions(response.actions || [])
-        setShowTaskLane(true)
-      } else {
-        // AI sent no new tasks — clear the lane
-        setShowTaskLane(false)
-        setActiveQuestions([])
-        setActiveActions([])
-      }
-    } catch {
-      setMessages(prev => [
-        ...prev,
-        { role: 'assistant', content: 'Sorry, something went wrong processing your responses. Please try again.' },
-      ])
-    } finally {
-      setLoading(false)
-    }
-  }
-
   const handleConclude = async (outcome: ConclusionOutcome, _notes: string): Promise<string> => {
     if (!activeChatId) throw new Error('No active chat')
 
@@ -529,14 +480,7 @@ export default function AssistantChatPage() {
     }
   }, [activeChatId, triageMeta.evidence_items])
 
-  const handleFlowPilotAnswer = useCallback((answer: string) => {
-    setInput(answer)
-    // Trigger send after a tick so the input state is set
-    setTimeout(() => {
-      const event = new KeyboardEvent('keydown', { key: 'Enter' })
-      inputRef.current?.dispatchEvent(event)
-    }, 0)
-  }, [])
+
 
   // Merge triage_update from AI response into local state
   const mergeTriageUpdate = useCallback((update: TriageUpdate) => {