Budgeting V1 (#1609)

* Budgeting V1

* Basic UI template

* Fully scaffolded budgeting v1

* Basic working budget

* Finalize donut chart for budgets

* Allow categorization of loan payments for budget

* Include loan payments in incomes_and_expenses scope

* Add budget allocations progress

* Empty states

* Clean up budget methods

* Category aggregation queries

* Handle overage scenarios in form

* Finalize budget donut chart controller

* Passing tests

* Fix allocation naming

* Add income category migration

* Native support for uncategorized budget category

* Formatting

* Fix subcategory sort order, padding

* Fix calculation for category rollups in budget

app/helpers/application_helper.rb

@@ -15,6 +15,16 @@ module ApplicationHelper
     ]
   end
 
+  def icon(key, size: "md", color: "current")
+    render partial: "shared/icon", locals: { key:, size:, color: }
+  end
+
+  # Convert alpha (0-1) to 8-digit hex (00-FF)
+  def hex_with_alpha(hex, alpha)
+    alpha_hex = (alpha * 255).round.to_s(16).rjust(2, "0")
+    "#{hex}#{alpha_hex}"
+  end
+
   def title(page_title)
     content_for(:title) { page_title }
   end