Fix flashes display after grid introduction

Closes #5

app/controllers/application_controller.rb

@@ -47,6 +47,8 @@ class ApplicationController < ActionController::Base
 
   def run_and_render(action)
     send action
-    render action
+    # 2024-01-17, Rails 7.1.2: For unknown reason turbo_stream layout is omitted
+    # during render on POST method only (GET, DESTROY are ok).
+    render action, layout: 'application'
   end
 end

app/controllers/units_controller.rb

@@ -19,7 +19,7 @@ class UnitsController < ApplicationController
   def create
     @unit = current_user.units.new(unit_params)
     if @unit.save
-      flash[:notice] = t(".success")
+      flash.now[:notice] = t(".success")
       run_and_render :index
     else
       render :new
@@ -31,7 +31,7 @@ class UnitsController < ApplicationController
 
   def update
     if @unit.update(unit_params)
-      flash[:notice] = t(".success")
+      flash.now[:notice] = t(".success")
       run_and_render :index
     else
       render :edit
@@ -40,7 +40,7 @@ class UnitsController < ApplicationController
 
   def destroy
     if @unit.destroy
-      flash[:notice] = t(".success")
+      flash.now[:notice] = t(".success")
     end
     run_and_render :index
   end