Lunchflow integration (#259)

* First pass lunch flow

* Fixes

- Fix apikey not being saved properly due to provider no reload support
- Fix proper messages if we try to link existing accounts.

* Fix better error handling

* Filter existing transactions and skip duplicates

* FIX messaging

* Branding :)

* Fix XSS and linter

* FIX provider concern

- also fix code duplication

* FIX md5 digest

* Updated determine_sync_start_date to be account-aware

* Review fixes

* Broaden error catch to not crash UI

* Fix buttons styling

* FIX process account error handling

* FIX account cap and url parsing

* Lunch Flow brand

* Found orphan i18n strings

* Remove per conversation with @sokie

---------

Co-authored-by: Juan José Mata <juanjo.mata@gmail.com>

app/controllers/concerns/accountable_resource.rb

@@ -68,6 +68,32 @@ module AccountableResource
     def set_link_options
       @show_us_link = Current.family.can_connect_plaid_us?
       @show_eu_link = Current.family.can_connect_plaid_eu?
+      @show_lunchflow_link = Current.family.can_connect_lunchflow?
+
+      # Preload Lunchflow accounts if available and cache them
+      if @show_lunchflow_link
+        cache_key = "lunchflow_accounts_#{Current.family.id}"
+
+        @lunchflow_accounts = Rails.cache.fetch(cache_key, expires_in: 5.minutes) do
+          begin
+            lunchflow_provider = Provider::LunchflowAdapter.build_provider
+
+            if lunchflow_provider.present?
+              accounts_data = lunchflow_provider.get_accounts
+              accounts_data[:accounts] || []
+            else
+              []
+            end
+          rescue Provider::Lunchflow::LunchflowError => e
+            Rails.logger.error("Failed to preload Lunchflow accounts: #{e.message}")
+            []
+          rescue StandardError => e
+            Rails.logger.error("Unexpected error preloading Lunchflow accounts: #{e.class}: #{e.message}")
+            Rails.logger.error(e.backtrace.join("\n"))
+            []
+          end
+        end
+      end
     end
 
     def accountable_type