AI Analysis and Content Strategy fixes. Enhanced Strategy Routes refactoring.

frontend/src/hooks/useCostEstimation.ts

@@ -0,0 +1,62 @@
+import { useState, useCallback } from 'react';
+import { PreflightOperation } from '../services/billingService';
+
+interface UseCostEstimationReturn {
+  showEstimation: (operations: PreflightOperation[]) => void;
+  estimationOperations: PreflightOperation[];
+  isEstimationOpen: boolean;
+  closeEstimation: () => void;
+}
+
+/**
+ * Hook for cost estimation before operations.
+ * 
+ * Usage:
+ * ```tsx
+ * const { showEstimation, estimationOperations, isEstimationOpen, closeEstimation } = useCostEstimation();
+ * 
+ * const handleGenerate = () => {
+ *   showEstimation([
+ *     {
+ *       provider: 'gemini',
+ *       model: 'gemini-2.5-flash',
+ *       operation_type: 'text_generation',
+ *       tokens_requested: 2000
+ *     }
+ *   ]);
+ * };
+ * 
+ * <CostEstimationModal
+ *   open={isEstimationOpen}
+ *   onClose={closeEstimation}
+ *   onConfirm={() => {
+ *     // Proceed with actual operation
+ *     performOperation();
+ *   }}
+ *   operations={estimationOperations}
+ * />
+ * ```
+ */
+export const useCostEstimation = (): UseCostEstimationReturn => {
+  const [isEstimationOpen, setIsEstimationOpen] = useState(false);
+  const [estimationOperations, setEstimationOperations] = useState<PreflightOperation[]>([]);
+
+  const showEstimation = useCallback((operations: PreflightOperation[]) => {
+    setEstimationOperations(operations);
+    setIsEstimationOpen(true);
+  }, []);
+
+  const closeEstimation = useCallback(() => {
+    setIsEstimationOpen(false);
+    setEstimationOperations([]);
+  }, []);
+
+  return {
+    showEstimation,
+    estimationOperations,
+    isEstimationOpen,
+    closeEstimation,
+  };
+};
+
+export default useCostEstimation;