Split UI (#1245)

* Initial split transaction support

* Add support to unsplit and edit split

* Update show.html.erb

* FIX address reviews

* Improve UX

* Update show.html.erb

* Reviews

* Update edit.html.erb

* Add parent category to dialog

* Update en.yml

* Add UI indication to totals

* FIX ui update

* Add category select like rest of app

* Add split ui

* Add settings configuration for split transactions

- Adds a new settings section for appearance changes
- Also adds extra checks for delete and API calls
- Also adds checks for parent/child changes

* fixes

- split transactions dark mode fix
- add split transactions to context menu

* Update entry.rb

1. New validation split_child_date_matches_parent — prevents saving a split child with a date different from its parent. This is the root-cause fix that
   protects all flows at once.
  2. Bulk update guard — bulk_update! now strips :date from attributes when processing split children, preventing the validation from raising and silently
   skipping the date change instead.

* N+1 fix for split_parent?

* Update entry.rb

  Problem: In bulk_update!, when a split child has :date removed from attrs (line 432) and the remaining attrs is empty (e.g., the bulk update only
  changed the date), entry.update! {} still ran as a no-op. But lock_saved_attributes! and mark_user_modified! at lines 443-444 executed unconditionally,
  incorrectly marking untouched split children as user-modified and opting them out of future syncs.

  Fix:
  1. Added a changed flag to track whether any actual modification happened
  2. Wrapped entry.update! in an if attrs.present? check so no-op updates are skipped
  3. Gated lock_saved_attributes! and mark_user_modified! behind if changed, so they only run when the entry was actually modified (either via attribute
  update or tag update)

* fixes

1. Indentation in show.html.erb Settings section — The split button block and delete block had extra indentation making them appear nested inside guard
  blocks they weren't part of. Fixed to match actual nesting.
  2. Skip @split_parents query when grouping is off — The controller now only loads split parent entries when show_split_grouped? is true, saving a query
  with joins when the feature is disabled.

app/javascript/controllers/split_transaction_controller.js

@@ -143,13 +143,13 @@ export default class extends Controller {
     if (balanced) {
       this.remainingTarget.classList.remove("text-destructive")
       this.remainingTarget.classList.add("text-success")
-      container.classList.remove("border-destructive", "bg-red-25")
-      container.classList.add("border-green-200", "bg-green-25")
+      container.classList.remove("border-destructive", "bg-red-tint-10")
+      container.classList.add("border-green-200", "bg-green-tint-10")
     } else {
       this.remainingTarget.classList.remove("text-success")
       this.remainingTarget.classList.add("text-destructive")
-      container.classList.remove("border-green-200", "bg-green-25")
-      container.classList.add("border-destructive", "bg-red-25")
+      container.classList.remove("border-green-200", "bg-green-tint-10")
+      container.classList.add("border-destructive", "bg-red-tint-10")
     }
 
     this.errorTarget.classList.toggle("hidden", balanced)