Add rows_to_skip config for transaction import

app/controllers/import/configurations_controller.rb

@@ -42,6 +42,7 @@ class Import::ConfigurationsController < ApplicationController
         :signage_convention,
         :amount_type_strategy,
         :amount_type_inflow_value,
+        :rows_to_skip
       )
     end
 end

app/models/import.rb

@@ -36,6 +36,7 @@ class Import < ApplicationRecord
   validates :col_sep, inclusion: { in: SEPARATORS.map(&:last) }
   validates :signage_convention, inclusion: { in: SIGNAGE_CONVENTIONS }, allow_nil: true
   validates :number_format, presence: true, inclusion: { in: NUMBER_FORMATS.keys }
+  validates :rows_to_skip, numericality: { greater_than_or_equal_to: 0 }
 
   has_many :rows, dependent: :destroy
   has_many :mappings, dependent: :destroy
@@ -248,7 +249,14 @@ class Import < ApplicationRecord
     end
 
     def parsed_csv
-      @parsed_csv ||= self.class.parse_csv_str(raw_file_str, col_sep: col_sep)
+      return @parsed_csv if defined?(@parsed_csv)
+
+      csv_content = raw_file_str || ""
+      if rows_to_skip.to_i > 0
+        csv_content = csv_content.lines.drop(rows_to_skip).join
+      end
+
+      @parsed_csv = self.class.parse_csv_str(csv_content, col_sep: col_sep)
     end
 
     def sanitize_number(value)

app/views/import/configurations/_transaction_import.html.erb

@@ -88,6 +88,9 @@
   <% end %>
 
   <%# Optional Fields %>
+  <%= form.number_field :rows_to_skip,
+                        { label: "Skip first n rows", min: 0, step: 1, value: 0 } %>
+
   <% unless import.account.present? %>
     <%= form.select :account_col_label,
                     import.csv_headers,

db/migrate/20251226205942_add_rows_to_skip_to_imports.rb

@@ -0,0 +1,5 @@
+class AddRowsToSkipToImports < ActiveRecord::Migration[7.2]
+  def change
+    add_column :imports, :rows_to_skip, :integer, default: 0, null: false
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.2].define(version: 2025_12_15_100443) do
+ActiveRecord::Schema[7.2].define(version: 2025_12_26_205942) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pgcrypto"
   enable_extension "plpgsql"
@@ -538,6 +538,7 @@ ActiveRecord::Schema[7.2].define(version: 2025_12_15_100443) do
     t.string "exchange_operating_mic_col_label"
     t.string "amount_type_strategy", default: "signed_amount"
     t.string "amount_type_inflow_value"
+    t.integer "rows_to_skip", default: 0, null: false
     t.index ["family_id"], name: "index_imports_on_family_id"
   end