feat: Initialize Craze Analytix project structure

Sets up the project with Vite, React, Tailwind CSS, Gemini AI integration, and necessary dependencies for data analysis. Includes initial configuration for TypeScript, Tailwind, and project metadata.

types.ts

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+
+
+export interface SalesRecord {
+  id: string;
+  customer: string;
+  year: number;
+  month: string; // "Apr-23"
+  week?: number;
+  asin: string;
+  sku: string;
+  title: string; // Added Product Title
+  articleName: string; // Kept for backward compatibility if mixed files used
+  units: number;
+  sellOut: number; // Parsed numeric value
+  line: string;
+}
+
+export interface FilterState {
+  customer: string[];
+  year: string[];
+  month: string[];
+  line: string[];
+  asin: string[];
+  sku: string[];
+  title: string[]; // Added Title filter
+}
+
+export interface LineGrowthMetric { // Renamed from GrowthMetric
+  line: string;
+  currentYearSellOut: number;
+  previousYearSellOut: number;
+  sellOutGrowthValue: number;
+  sellOutGrowthPercentage: number;
+  
+  currentYearUnits: number;
+  previousYearUnits: number;
+  unitsGrowthValue: number;
+  unitsGrowthPercentage: number;
+}
+
+export interface ItemGrowthMetric {
+  sku: string;
+  asin: string;
+  title: string;
+  line: string; // Keep line for context
+  currentYearSellOut: number;
+  previousYearSellOut: number;
+  sellOutGrowthValue: number;
+  sellOutGrowthPercentage: number;
+  
+  currentYearUnits: number;
+  previousYearUnits: number;
+  unitsGrowthValue: number;
+  unitsGrowthPercentage: number;
+}
+
+
+export interface SeasonalityPoint {
+  name: string; // "Jan", "Feb", etc.
+  [year: string]: number | string; // Dynamic keys for years: "2023": 500, "2024": 600
+}
+
+export interface YearlySplitData {
+  name: string;
+  // Dynamic keys like "2023", "2024" or "2023_value", "2023_units"
+  [key: string]: number | string; 
+}
+
+export interface AggregatedData {
+  totalSellOut: number;
+  totalUnits: number;
+  totalsByYear: Record<string, { sellOut: number; units: number }>;
+  byLine: { name: string; value: number; units: number }[];
+  byCustomer: { name: string; value: number }[];
+  seasonality: SeasonalityPoint[];
+  seasonalityUnits: SeasonalityPoint[];
+  availableYears: string[];
+  topMovers: LineGrowthMetric[]; // Now uses LineGrowthMetric
+  bottomMovers: LineGrowthMetric[]; // Now uses LineGrowthMetric
+  comparisonPeriods: { current: string; previous: string };
+  topLinesSplit: YearlySplitData[];
+  byCustomerSplit: YearlySplitData[];
+  byLineOverviewSplit: YearlySplitData[];
+}
+
+export interface ChatMessage {
+  role: 'user' | 'model';
+  text: string;
+  timestamp: Date;
+}
+
+// New Interfaces for Dynamic Pivot Grid
+export interface YearlyData {
+    sellOut: number;
+    units: number;
+}
+
+export interface MonthlyPivot {
+    monthIndex: number;
+    byYear: Record<string, YearlyData>;
+}
+
+export interface PivotRow {
+    id: string;
+    customer: string;
+    line: string;
+    title: string; // Added Title
+    articleName: string;
+    sku: string;
+    asin: string;
+    
+    // Dynamic buckets
+    totalsByYear: Record<string, YearlyData>; 
+    months: MonthlyPivot[]; // Always 12 elements
+}
+
+export interface TimeSeriesData {
+  name: string; // e.g., "Apr '23" or "W21 '23"
+  sellOut: number;
+  units: number;
+}
+
+export interface ComparisonTimeSeriesPoint {
+  week: number;
+  name: string; // "W1", "W2", etc.
+  [key: string]: number | string; // Dynamic keys like "2023_sellOut", "2024_units"
+}