Reorganize Settings sections + add LLM model/prompt configs (#116)

* Reshuffle/organize settings UI
* Settings: AI prompt display/minor touch-ups
* API key settings tests
* Moved import/export together
* Collapsible LLM prompt DIVs
* Add export tests

test/controllers/family_exports_controller_test.rb

@@ -33,7 +33,7 @@ class FamilyExportsControllerTest < ActionDispatch::IntegrationTest
       post family_exports_path
     end
 
-    assert_redirected_to settings_profile_path
+    assert_redirected_to imports_path
     assert_equal "Export started. You'll be able to download it shortly.", flash[:notice]
 
     export = @family.family_exports.last
@@ -67,7 +67,87 @@ class FamilyExportsControllerTest < ActionDispatch::IntegrationTest
     export = @family.family_exports.create!(status: "processing")
 
     get download_family_export_path(export)
-    assert_redirected_to settings_profile_path
+    assert_redirected_to imports_path
     assert_equal "Export not ready for download", flash[:alert]
   end
+
+  test "admin can delete export" do
+    export = @family.family_exports.create!(status: "completed")
+
+    assert_difference "@family.family_exports.count", -1 do
+      delete family_export_path(export)
+    end
+
+    assert_redirected_to imports_path
+    assert_equal "Export deleted successfully", flash[:notice]
+  end
+
+  test "admin can delete export with attached file" do
+    export = @family.family_exports.create!(status: "completed")
+    export.export_file.attach(
+      io: StringIO.new("test zip content"),
+      filename: "test.zip",
+      content_type: "application/zip"
+    )
+
+    assert export.export_file.attached?
+    assert_difference "@family.family_exports.count", -1 do
+      delete family_export_path(export)
+    end
+
+    assert_redirected_to imports_path
+    assert_equal "Export deleted successfully", flash[:notice]
+  end
+
+  test "admin can delete failed export with attached file" do
+    export = @family.family_exports.create!(status: "failed")
+    export.export_file.attach(
+      io: StringIO.new("failed export content"),
+      filename: "failed.zip",
+      content_type: "application/zip"
+    )
+
+    assert export.export_file.attached?
+    assert_difference "@family.family_exports.count", -1 do
+      delete family_export_path(export)
+    end
+
+    assert_redirected_to imports_path
+    assert_equal "Export deleted successfully", flash[:notice]
+  end
+
+  test "export file is purged when export is deleted" do
+    export = @family.family_exports.create!(status: "completed")
+    export.export_file.attach(
+      io: StringIO.new("test zip content"),
+      filename: "test.zip",
+      content_type: "application/zip"
+    )
+
+    # Verify file is attached
+    assert export.export_file.attached?
+    file_id = export.export_file.id
+
+    # Delete the export
+    delete family_export_path(export)
+
+    # Verify the export record is gone
+    assert_not FamilyExport.exists?(export.id)
+
+    # Verify the Active Storage attachment is also gone
+    # Note: Active Storage purges files asynchronously with `dependent: :purge_later`
+    # In tests, we can check that the attachment record is gone
+    assert_not ActiveStorage::Attachment.exists?(file_id)
+  end
+
+  test "non-admin cannot delete export" do
+    export = @family.family_exports.create!(status: "completed")
+    sign_in @non_admin
+
+    assert_no_difference "@family.family_exports.count" do
+      delete family_export_path(export)
+    end
+
+    assert_redirected_to root_path
+  end
 end