feat(agent-view): refactor to folder pattern and add Cursor model support

- Refactor agent-view.tsx from 1028 lines to ~215 lines
- Create agent-view/ folder with components/, hooks/, input-area/, shared/
- Extract hooks: useAgentScroll, useFileAttachments, useAgentShortcuts, useAgentSession
- Extract components: AgentHeader, ChatArea, MessageList, MessageBubble, ThinkingIndicator
- Extract input-area: AgentInputArea, FilePreview, QueueDisplay, InputControls
- Add AgentModelSelector with Claude and Cursor CLI model support
- Update /models/available to use ProviderFactory.getAllAvailableModels()
- Update /models/providers to include Cursor CLI status

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

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

apps/ui/src/components/views/agent-view/hooks/use-agent-session.ts

@@ -0,0 +1,61 @@
+import { useState, useCallback, useEffect, useRef } from 'react';
+import { useAppStore } from '@/store/app-store';
+
+interface UseAgentSessionOptions {
+  projectPath: string | undefined;
+}
+
+interface UseAgentSessionResult {
+  currentSessionId: string | null;
+  handleSelectSession: (sessionId: string | null) => void;
+}
+
+export function useAgentSession({ projectPath }: UseAgentSessionOptions): UseAgentSessionResult {
+  const { setLastSelectedSession, getLastSelectedSession } = useAppStore();
+  const [currentSessionId, setCurrentSessionId] = useState<string | null>(null);
+
+  // Track if initial session has been loaded
+  const initialSessionLoadedRef = useRef(false);
+
+  // Handle session selection with persistence
+  const handleSelectSession = useCallback(
+    (sessionId: string | null) => {
+      setCurrentSessionId(sessionId);
+      // Persist the selection for this project
+      if (projectPath) {
+        setLastSelectedSession(projectPath, sessionId);
+      }
+    },
+    [projectPath, setLastSelectedSession]
+  );
+
+  // Restore last selected session when switching to Agent view or when project changes
+  useEffect(() => {
+    if (!projectPath) {
+      // No project, reset
+      setCurrentSessionId(null);
+      initialSessionLoadedRef.current = false;
+      return;
+    }
+
+    // Only restore once per project
+    if (initialSessionLoadedRef.current) return;
+    initialSessionLoadedRef.current = true;
+
+    const lastSessionId = getLastSelectedSession(projectPath);
+    if (lastSessionId) {
+      console.log('[AgentView] Restoring last selected session:', lastSessionId);
+      setCurrentSessionId(lastSessionId);
+    }
+  }, [projectPath, getLastSelectedSession]);
+
+  // Reset initialSessionLoadedRef when project changes
+  useEffect(() => {
+    initialSessionLoadedRef.current = false;
+  }, [projectPath]);
+
+  return {
+    currentSessionId,
+    handleSelectSession,
+  };
+}