Add admin panel: visit counter, product editor, screenshots upload

internal/database/migrate.go

@@ -7,13 +7,38 @@ import (
 )
 
 func Migrate(ctx context.Context, pool *pgxpool.Pool) error {
-	_, err := pool.Exec(ctx, `
-		CREATE TABLE IF NOT EXISTS admins (
+	queries := []string{
+		`CREATE TABLE IF NOT EXISTS admins (
 			id            SERIAL PRIMARY KEY,
 			email         VARCHAR(255) UNIQUE NOT NULL,
 			password_hash VARCHAR(255) NOT NULL,
 			created_at    TIMESTAMPTZ NOT NULL DEFAULT NOW()
-		);
-	`)
-	return err
+		)`,
+		`ALTER TABLE products ADD COLUMN IF NOT EXISTS details TEXT NOT NULL DEFAULT ''`,
+		`ALTER TABLE products ADD COLUMN IF NOT EXISTS is_active BOOLEAN NOT NULL DEFAULT true`,
+		`ALTER TABLE products ADD COLUMN IF NOT EXISTS updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()`,
+		`CREATE TABLE IF NOT EXISTS product_images (
+			id          SERIAL PRIMARY KEY,
+			product_id  INT NOT NULL REFERENCES products(id) ON DELETE CASCADE,
+			file_path   VARCHAR(512) NOT NULL,
+			is_primary  BOOLEAN NOT NULL DEFAULT false,
+			sort_order  INT NOT NULL DEFAULT 0,
+			created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW()
+		)`,
+		`CREATE INDEX IF NOT EXISTS idx_product_images_product ON product_images (product_id)`,
+		`CREATE TABLE IF NOT EXISTS site_stats (
+			id           INT PRIMARY KEY DEFAULT 1 CHECK (id = 1),
+			total_visits BIGINT NOT NULL DEFAULT 0,
+			today_visits INT NOT NULL DEFAULT 0,
+			visit_date   DATE NOT NULL DEFAULT CURRENT_DATE
+		)`,
+		`INSERT INTO site_stats (id) VALUES (1) ON CONFLICT (id) DO NOTHING`,
+	}
+
+	for _, q := range queries {
+		if _, err := pool.Exec(ctx, q); err != nil {
+			return err
+		}
+	}
+	return nil
 }