Add a title to the create investment page

app/components/budgets/investments/new_component.html.erb

@@ -1,19 +1,7 @@
 <main class="budget-investment-new">
   <%= back_link_to budgets_path %>
 
-  <header>
+  <%= header %>
-    <h1>
-      <%= t("budgets.investments.form.title") %>
-
-      <% if budget.single_heading? %>
-        <span>
-          <%= t("budgets.investments.form.subtitle",
-                heading: budget.headings.first.name,
-                price: budget.formatted_heading_price(budget.headings.first)) %>
-        </span>
-      <% end %>
-    </h1>
-  </header>
 
   <%= render "/budgets/investments/form", form_url: budget_investments_path(budget) %>
 </main>

app/components/budgets/investments/new_component.rb

@@ -1,7 +1,26 @@
 class Budgets::Investments::NewComponent < ApplicationComponent
+  include Header
   attr_reader :budget
 
   def initialize(budget)
     @budget = budget
   end
+
+  def title
+    safe_join([base_title, subtitle].compact, " ")
+  end
+
+  private
+
+    def base_title
+      sanitize(t("budgets.investments.form.title"))
+    end
+
+    def subtitle
+      if budget.single_heading?
+        tag.span t("budgets.investments.form.subtitle",
+                   heading: budget.headings.first.name,
+                   price: budget.formatted_heading_price(budget.headings.first))
+      end
+    end
 end

app/components/concerns/header.rb

@@ -3,14 +3,24 @@ module Header
 
   def header(&block)
     provide(:title) do
-      "#{t("#{namespace}.header.title")} - #{title} - #{setting["org_name"]}"
+      [
+        t("#{namespace}.header.title", default: ""),
+        strip_tags(title),
+        setting["org_name"]
+      ].reject(&:blank?).join(" - ")
+    end
+
+    heading_tag = if %w[admin management moderation sdg_management valuation].include?(namespace)
+                    "h2"
+                  else
+                    "h1"
                   end
 
     tag.header do
       if block_given?
-        tag.h2(title) + capture(&block)
+        content_tag(heading_tag, title) + capture(&block)
       else
-        tag.h2(title)
+        content_tag(heading_tag, title)
       end
     end
   end