Account Activity View + Account Forms (#1406)

* Remove balance mode, sketch out refactor

* Activity view checkpoint

* Entry partials, checkpoint

* Finish txn partial

* Give entries context when editing for different turbo responses

* Calculate change of balance for each entry

* Account tabs consolidation

* Translations, linting, brakeman updates

* Account actions concern

* Finalize forms, get account system tests passing

* Get tests passing

* Lint, rubocop, schema updates

* Improve routing and stream responses

* Fix broken routes

* Add import option for adding accounts

* Fix system test

* Fix test specificity

* Fix sparklines

* Improve account redirects

app/models/period.rb

@@ -1,12 +1,18 @@
 class Period
   attr_reader :name, :date_range
 
-  def self.find_by_name(name)
-    INDEX[name]
-  end
+  class << self
+    def from_param(param)
+      find_by_name(param) || self.last_30_days
+    end
 
-  def self.names
-    INDEX.keys.sort
+    def find_by_name(name)
+      INDEX[name]
+    end
+
+    def names
+      INDEX.keys.sort
+    end
   end
 
   def initialize(name: "custom", date_range:)