diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index f5ce0be7..400f5949 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2025-08-12 13:33:30 UTC using RuboCop version 1.79.2.
+# on 2025-08-12 15:04:30 UTC using RuboCop version 1.79.2.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -545,7 +545,7 @@ Metrics/BlockNesting:
 # Offense count: 14
 # Configuration parameters: CountComments, CountAsOne.
 Metrics/ClassLength:
-  Max: 646
+  Max: 655
 
 # Offense count: 24
 # Configuration parameters: AllowedMethods, AllowedPatterns.
@@ -1810,6 +1810,7 @@ Style/NumericPredicate:
     - 'app/helpers/application_helper.rb'
     - 'app/helpers/date_time_helper.rb'
     - 'app/helpers/format_helper.rb'
+    - 'app/lib/rails_version.rb'
     - 'app/models/cfp.rb'
     - 'app/models/conference.rb'
     - 'app/models/event.rb'
@@ -2074,7 +2075,7 @@ Style/WordArray:
   EnforcedStyle: percent
   MinSize: 6
 
-# Offense count: 431
+# Offense count: 430
 # This cop supports safe autocorrection (--autocorrect).
 # Configuration parameters: AllowHeredoc, AllowURI, AllowQualifiedName, URISchemes, IgnoreCopDirectives, AllowedPatterns, SplitStrings.
 # URISchemes: http, https
diff --git a/Gemfile b/Gemfile
index 417143dd..35ba4235 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,9 +10,9 @@ ruby '~> 3.3'
 
 # as web framework
 if next?
-  gem 'rails', '~> 7.1'
+  gem 'rails', '~> 8.0'
 else
-  gem 'rails', '~> 7.0'
+  gem 'rails', '~> 7.2'
 end
 
 # Use Puma as the app server
@@ -192,10 +192,6 @@ gem 'icalendar'
 # to tame logs
 gem 'lograge'
 
-# FIXME: https://github.com/ruby-concurrency/concurrent-ruby/commit/d7ce956dacd0b772273d39b8ed31a30cff7ecf38
-#        remove after updating to rails to >7.1
-gem 'concurrent-ruby', '1.3.4'
-
 group :development do
   # for static code analisys
   gem 'rubocop', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index b59e71e5..feeabffe 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,99 +1,105 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    Ascii85 (2.0.1)
-    actioncable (7.0.8.4)
-      actionpack (= 7.0.8.4)
-      activesupport (= 7.0.8.4)
+    Ascii85 (1.1.0)
+    actioncable (7.2.2.1)
+      actionpack (= 7.2.2.1)
+      activesupport (= 7.2.2.1)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
-    actionmailbox (7.0.8.4)
-      actionpack (= 7.0.8.4)
-      activejob (= 7.0.8.4)
-      activerecord (= 7.0.8.4)
-      activestorage (= 7.0.8.4)
-      activesupport (= 7.0.8.4)
-      mail (>= 2.7.1)
-      net-imap
-      net-pop
-      net-smtp
-    actionmailer (7.0.8.4)
-      actionpack (= 7.0.8.4)
-      actionview (= 7.0.8.4)
-      activejob (= 7.0.8.4)
-      activesupport (= 7.0.8.4)
-      mail (~> 2.5, >= 2.5.4)
-      net-imap
-      net-pop
-      net-smtp
-      rails-dom-testing (~> 2.0)
-    actionpack (7.0.8.4)
-      actionview (= 7.0.8.4)
-      activesupport (= 7.0.8.4)
-      rack (~> 2.0, >= 2.2.4)
+      zeitwerk (~> 2.6)
+    actionmailbox (7.2.2.1)
+      actionpack (= 7.2.2.1)
+      activejob (= 7.2.2.1)
+      activerecord (= 7.2.2.1)
+      activestorage (= 7.2.2.1)
+      activesupport (= 7.2.2.1)
+      mail (>= 2.8.0)
+    actionmailer (7.2.2.1)
+      actionpack (= 7.2.2.1)
+      actionview (= 7.2.2.1)
+      activejob (= 7.2.2.1)
+      activesupport (= 7.2.2.1)
+      mail (>= 2.8.0)
+      rails-dom-testing (~> 2.2)
+    actionpack (7.2.2.1)
+      actionview (= 7.2.2.1)
+      activesupport (= 7.2.2.1)
+      nokogiri (>= 1.8.5)
+      racc
+      rack (>= 2.2.4, < 3.2)
+      rack-session (>= 1.0.1)
       rack-test (>= 0.6.3)
-      rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.2.0)
-    actiontext (7.0.8.4)
-      actionpack (= 7.0.8.4)
-      activerecord (= 7.0.8.4)
-      activestorage (= 7.0.8.4)
-      activesupport (= 7.0.8.4)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+      useragent (~> 0.16)
+    actiontext (7.2.2.1)
+      actionpack (= 7.2.2.1)
+      activerecord (= 7.2.2.1)
+      activestorage (= 7.2.2.1)
+      activesupport (= 7.2.2.1)
       globalid (>= 0.6.0)
       nokogiri (>= 1.8.5)
-    actionview (7.0.8.4)
-      activesupport (= 7.0.8.4)
+    actionview (7.2.2.1)
+      activesupport (= 7.2.2.1)
       builder (~> 3.1)
-      erubi (~> 1.4)
-      rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.1, >= 1.2.0)
+      erubi (~> 1.11)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
     active_model_serializers (0.10.15)
       actionpack (>= 4.1)
       activemodel (>= 4.1)
       case_transform (>= 0.2)
       jsonapi-renderer (>= 0.1.1.beta1, < 0.3)
-    activejob (7.0.8.4)
-      activesupport (= 7.0.8.4)
+    activejob (7.2.2.1)
+      activesupport (= 7.2.2.1)
       globalid (>= 0.3.6)
-    activemodel (7.0.8.4)
-      activesupport (= 7.0.8.4)
-    activerecord (7.0.8.4)
-      activemodel (= 7.0.8.4)
-      activesupport (= 7.0.8.4)
-    activestorage (7.0.8.4)
-      actionpack (= 7.0.8.4)
-      activejob (= 7.0.8.4)
-      activerecord (= 7.0.8.4)
-      activesupport (= 7.0.8.4)
+    activemodel (7.2.2.1)
+      activesupport (= 7.2.2.1)
+    activerecord (7.2.2.1)
+      activemodel (= 7.2.2.1)
+      activesupport (= 7.2.2.1)
+      timeout (>= 0.4.0)
+    activestorage (7.2.2.1)
+      actionpack (= 7.2.2.1)
+      activejob (= 7.2.2.1)
+      activerecord (= 7.2.2.1)
+      activesupport (= 7.2.2.1)
       marcel (~> 1.0)
-      mini_mime (>= 1.1.0)
-    activesupport (7.0.8.4)
-      concurrent-ruby (~> 1.0, >= 1.0.2)
+    activesupport (7.2.2.1)
+      base64
+      benchmark (>= 0.3)
+      bigdecimal
+      concurrent-ruby (~> 1.0, >= 1.3.1)
+      connection_pool (>= 2.2.5)
+      drb
       i18n (>= 1.6, < 2)
+      logger (>= 1.4.2)
       minitest (>= 5.1)
-      tzinfo (~> 2.0)
-    acts_as_commentable_with_threading (2.0.1)
-      activerecord (>= 4.0)
-      activesupport (>= 4.0)
-      awesome_nested_set (>= 3.0)
-    acts_as_list (1.2.4)
-      activerecord (>= 6.1)
-      activesupport (>= 6.1)
+      securerandom (>= 0.3)
+      tzinfo (~> 2.0, >= 2.0.5)
+    acts_as_commentable_with_threading (1.2.0)
+      activerecord (>= 3.0)
+      activesupport (>= 3.0)
+      awesome_nested_set (>= 2.0)
+    acts_as_list (1.0.4)
+      activerecord (>= 4.2)
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
     afm (0.2.2)
-    ajax-datatables-rails (1.5.0)
-      rails (>= 6.0)
+    ajax-datatables-rails (1.3.1)
       zeitwerk
     archive-zip (0.12.0)
       io-like (~> 0.3.0)
     ast (2.4.3)
-    autoprefixer-rails (10.4.21.0)
+    autoprefixer-rails (10.3.1.0)
       execjs (~> 2)
     awesome_nested_set (3.8.0)
       activerecord (>= 4.0.0, < 8.1)
-    base64 (0.2.0)
+    aws_cf_signer (0.1.3)
+    base64 (0.3.0)
     bcrypt (3.1.20)
+    benchmark (0.4.1)
     bigdecimal (3.2.2)
     bindex (0.8.1)
     bootstrap-sass (3.4.1)
@@ -102,7 +108,7 @@ GEM
     bootstrap-switch-rails (3.3.3)
     builder (3.3.0)
     byebug (11.1.3)
-    cancancan (3.6.1)
+    cancancan (3.3.0)
     capybara (3.40.0)
       addressable
       matrix
@@ -112,12 +118,13 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
-    carrierwave (3.0.7)
-      activemodel (>= 6.0.0)
-      activesupport (>= 6.0.0)
+    carrierwave (2.2.2)
+      activemodel (>= 5.0.0)
+      activesupport (>= 5.0.0)
       addressable (~> 2.6)
       image_processing (~> 1.1)
       marcel (~> 1.0.0)
+      mini_mime (>= 0.1.3)
       ssrf_filter (~> 1.0)
     carrierwave-bombshelter (0.2.2)
       activesupport (>= 3.2.0)
@@ -125,48 +132,44 @@ GEM
       fastimage
     case_transform (0.2)
       activesupport
-    caxlsx (4.1.0)
+    caxlsx (3.1.0)
       htmlentities (~> 4.3, >= 4.3.4)
       marcel (~> 1.0)
       nokogiri (~> 1.10, >= 1.10.4)
       rubyzip (>= 1.3.0, < 3)
-    caxlsx_rails (0.6.4)
+    caxlsx_rails (0.6.2)
       actionpack (>= 3.1)
       caxlsx (>= 3.0)
-    chartkick (5.1.2)
-    childprocess (5.1.0)
-      logger (~> 1.5)
+    chartkick (4.1.3)
     chronic (0.10.2)
     chunky_png (1.4.0)
-    climate_control (1.2.0)
-    cloudinary (2.2.0)
-      faraday (>= 2.0.1, < 3.0.0)
-      faraday-follow_redirects (~> 0.3.0)
-      faraday-multipart (~> 1.0, >= 1.0.4)
-      ostruct
+    climate_control (1.0.1)
+    cloudinary (1.20.0)
+      aws_cf_signer
+      rest-client (>= 2.0.0)
     cocoon (1.2.15)
-    concurrent-ruby (1.3.4)
+    colorize (0.8.1)
+    concurrent-ruby (1.3.5)
+    connection_pool (2.5.3)
     countable-rails (0.0.1)
       railties (>= 3.1)
-    crack (1.0.0)
-      bigdecimal
+    crack (0.4.5)
       rexml
     crass (1.0.6)
-    csv (3.3.2)
-    daemons (1.4.1)
-    dalli (3.2.8)
+    daemons (1.4.0)
+    dalli (2.7.11)
     dante (0.2.0)
     database_cleaner (2.1.0)
       database_cleaner-active_record (>= 2, < 3)
-    database_cleaner-active_record (2.2.0)
+    database_cleaner-active_record (2.2.2)
       activerecord (>= 5.a)
-      database_cleaner-core (~> 2.0.0)
+      database_cleaner-core (~> 2.0)
     database_cleaner-core (2.0.1)
     date (3.4.1)
-    delayed_job (4.1.13)
-      activesupport (>= 3.0, < 9.0)
-    delayed_job_active_record (4.1.11)
-      activerecord (>= 3.0, < 9.0)
+    delayed_job (4.1.10)
+      activesupport (>= 3.0, < 8.0)
+    delayed_job_active_record (4.1.7)
+      activerecord (>= 3.0, < 8.0)
       delayed_job (>= 3.0, < 5)
     devise (4.9.4)
       bcrypt (~> 3.0)
@@ -176,96 +179,117 @@ GEM
       warden (~> 1.2.3)
     devise_ichain_authenticatable (0.3.2)
       devise (>= 2.2)
-    diff-lcs (1.5.1)
-    docile (1.4.1)
-    dotenv (3.1.7)
-    dotenv-rails (3.1.7)
-      dotenv (= 3.1.7)
-      railties (>= 6.1)
+    diff-lcs (1.6.2)
+    docile (1.4.0)
+    domain_name (0.5.20190701)
+      unf (>= 0.0.5, < 1.0.0)
+    dotenv (2.7.6)
+    dotenv-rails (2.7.6)
+      dotenv (= 2.7.6)
+      railties (>= 3.2)
+    drb (2.2.3)
+    erb (5.0.2)
     erubi (1.13.1)
-    execjs (2.10.0)
-    factory_bot (6.5.0)
+    erubis (2.7.0)
+    execjs (2.8.1)
+    factory_bot (6.2.0)
       activesupport (>= 5.0.0)
-    factory_bot_rails (6.4.4)
-      factory_bot (~> 6.5)
+    factory_bot_rails (6.2.0)
+      factory_bot (~> 6.2.0)
       railties (>= 5.0.0)
-    faker (3.5.1)
-      i18n (>= 1.8.11, < 2)
-    faraday (2.12.2)
-      faraday-net_http (>= 2.0, < 3.5)
-      json
-      logger
-    faraday-follow_redirects (0.3.0)
-      faraday (>= 1, < 3)
-    faraday-multipart (1.0.4)
-      multipart-post (~> 2)
-    faraday-net_http (3.4.0)
-      net-http (>= 0.5.0)
-    fastimage (2.3.1)
+    faker (2.18.0)
+      i18n (>= 1.6, < 2)
+    faraday (1.7.0)
+      faraday-em_http (~> 1.0)
+      faraday-em_synchrony (~> 1.0)
+      faraday-excon (~> 1.1)
+      faraday-httpclient (~> 1.0.1)
+      faraday-net_http (~> 1.0)
+      faraday-net_http_persistent (~> 1.1)
+      faraday-patron (~> 1.0)
+      faraday-rack (~> 1.0)
+      multipart-post (>= 1.2, < 3)
+      ruby2_keywords (>= 0.0.4)
+    faraday-em_http (1.0.0)
+    faraday-em_synchrony (1.0.0)
+    faraday-excon (1.1.0)
+    faraday-httpclient (1.0.1)
+    faraday-net_http (1.0.1)
+    faraday-net_http_persistent (1.2.0)
+    faraday-patron (1.0.0)
+    faraday-rack (1.0.0)
+    fastimage (2.2.5)
     feature (1.4.0)
-    ffi (1.17.2)
-    font-awesome-sass (6.5.2)
+    ffi (1.15.3)
+    font-awesome-sass (6.7.2)
       sassc (~> 2.0)
     geckodriver-helper (0.24.0)
       archive-zip (~> 0.7)
     globalid (1.2.1)
       activesupport (>= 6.1)
     gravtastic (3.2.6)
-    haml (6.3.0)
-      temple (>= 0.8.2)
-      thor
+    haml (5.2.2)
+      temple (>= 0.8.0)
       tilt
-    haml-rails (2.1.0)
+    haml-rails (2.0.1)
       actionpack (>= 5.1)
       activesupport (>= 5.1)
-      haml (>= 4.0.6)
+      haml (>= 4.0.6, < 6.0)
+      html2haml (>= 1.0.1)
       railties (>= 5.1)
-    haml_lint (0.59.0)
-      haml (>= 5.0)
+    haml_lint (0.37.1)
+      haml (>= 4.0, < 5.3)
       parallel (~> 1.10)
       rainbow
-      rubocop (>= 1.0)
+      rubocop (>= 0.50.0)
       sysexits (~> 1.1)
-    hashdiff (1.2.0)
+    hashdiff (1.0.1)
     hashery (2.1.2)
-    hashie (5.0.0)
+    hashie (4.1.0)
+    html2haml (2.2.0)
+      erubis (~> 2.7.0)
+      haml (>= 4.0, < 6)
+      nokogiri (>= 1.6.0)
+      ruby_parser (~> 3.5)
     htmlentities (4.3.4)
+    http-accept (1.7.0)
+    http-cookie (1.0.4)
+      domain_name (~> 0.5)
     i18n (1.14.7)
       concurrent-ruby (~> 1.0)
-    i18n_data (1.1.0)
-      simple_po_parser (~> 1.1)
-    icalendar (2.10.3)
+    i18n_data (0.13.0)
+    icalendar (2.7.1)
       ice_cube (~> 0.16)
-      ostruct
-    ice_cube (0.17.0)
-    image_processing (1.13.0)
+    ice_cube (0.16.3)
+    image_processing (1.12.1)
       mini_magick (>= 4.9.5, < 5)
       ruby-vips (>= 2.0.17, < 3)
+    io-console (0.8.1)
     io-like (0.3.1)
-    iso-639 (0.3.8)
-      csv
+    irb (1.15.2)
+      pp (>= 0.6.0)
+      rdoc (>= 4.0.0)
+      reline (>= 0.4.2)
+    iso-639 (0.3.5)
     jquery-datatables-rails (3.4.0)
       actionpack (>= 3.1)
       jquery-rails
       railties (>= 3.1)
       sass-rails
-    jquery-rails (4.6.0)
+    jquery-rails (4.4.0)
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    jquery-ui-rails (8.0.0)
+    jquery-ui-rails (6.0.1)
       railties (>= 3.2.16)
     json (2.13.2)
-    json-schema (5.2.1)
-      addressable (~> 2.8)
-      bigdecimal (~> 3.1)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
     jsonapi-renderer (0.2.2)
-    jwt (2.9.3)
-      base64
+    jwt (2.2.3)
     language_server-protocol (3.17.0.5)
-    launchy (3.0.1)
+    launchy (2.5.2)
       addressable (~> 2.8)
-      childprocess (~> 5.0)
     leaflet-rails (1.9.5)
       actionpack (>= 4.2.0)
       railties (>= 4.2.0)
@@ -277,13 +301,13 @@ GEM
       railties (>= 6.1)
       rexml
     lint_roller (1.1.0)
-    logger (1.6.3)
+    logger (1.7.0)
     lograge (0.14.0)
       actionpack (>= 4)
       activesupport (>= 4)
       railties (>= 4)
       request_store (~> 1.0)
-    loofah (2.24.0)
+    loofah (2.24.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
     mail (2.8.1)
@@ -293,28 +317,28 @@ GEM
       net-smtp
     marcel (1.0.4)
     matrix (0.4.2)
-    method_source (1.1.0)
-    mina (1.2.5)
+    mime-types (3.3.1)
+      mime-types-data (~> 3.2015)
+    mime-types-data (3.2021.0704)
+    mina (1.2.4)
+      open4 (~> 1.3.4)
       rake
-    mini_magick (4.13.2)
+    mini_magick (4.11.0)
     mini_mime (1.1.5)
     mini_portile2 (2.8.9)
     minitest (5.25.5)
-    monetize (1.13.0)
+    monetize (1.9.4)
       money (~> 6.12)
-    money (6.19.0)
+    money (6.13.8)
       i18n (>= 0.6.4, <= 2)
-    money-rails (1.15.0)
+    money-rails (1.14.0)
       activesupport (>= 3.0)
-      monetize (~> 1.9)
-      money (~> 6.13)
+      monetize (~> 1.9.0)
+      money (~> 6.13.2)
       railties (>= 3.0)
     multi_json (1.15.0)
-    multi_xml (0.7.1)
-      bigdecimal (~> 3.1)
-    multipart-post (2.4.1)
-    net-http (0.6.0)
-      uri
+    multi_xml (0.6.0)
+    multipart-post (2.1.1)
     net-imap (0.5.9)
       date
       net-protocol
@@ -322,47 +346,46 @@ GEM
       net-protocol
     net-protocol (0.2.2)
       timeout
-    net-smtp (0.5.0)
+    net-smtp (0.5.1)
       net-protocol
-    next_rails (1.4.2)
-      rainbow (>= 3)
+    netrc (0.11.0)
+    next_rails (1.0.4)
+      colorize (>= 0.8.1)
     nio4r (2.7.4)
     nokogiri (1.18.9)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    oauth2 (2.0.9)
-      faraday (>= 0.17.3, < 3.0)
+    oauth2 (1.4.7)
+      faraday (>= 0.8, < 2.0)
       jwt (>= 1.0, < 3.0)
+      multi_json (~> 1.3)
       multi_xml (~> 0.5)
-      rack (>= 1.2, < 4)
-      snaky_hash (~> 2.0)
-      version_gem (~> 1.1)
-    omniauth (2.1.2)
+      rack (>= 1.2, < 3)
+    omniauth (2.0.4)
       hashie (>= 3.4.6)
-      rack (>= 2.2.3)
+      rack (>= 1.6.2, < 3)
       rack-protection
-    omniauth-facebook (10.0.0)
-      bigdecimal
-      omniauth-oauth2 (>= 1.2, < 3)
-    omniauth-github (2.0.1)
+    omniauth-facebook (8.0.0)
+      omniauth-oauth2 (~> 1.2)
+    omniauth-github (2.0.0)
       omniauth (~> 2.0)
-      omniauth-oauth2 (~> 1.8)
-    omniauth-google-oauth2 (1.2.0)
-      jwt (>= 2.9)
-      oauth2 (~> 2.0)
-      omniauth (~> 2.0)
-      omniauth-oauth2 (~> 1.8)
-    omniauth-oauth2 (1.8.0)
-      oauth2 (>= 1.4, < 3)
+      omniauth-oauth2 (~> 1.7.1)
+    omniauth-google-oauth2 (1.0.0)
+      jwt (>= 2.0)
+      oauth2 (~> 1.1)
       omniauth (~> 2.0)
+      omniauth-oauth2 (~> 1.7.1)
+    omniauth-oauth2 (1.7.1)
+      oauth2 (~> 1.4)
+      omniauth (>= 1.9, < 3)
     omniauth-openid (2.0.1)
       omniauth (>= 1.0, < 3.0)
       rack-openid (~> 1.4.0)
-    omniauth-rails_csrf_protection (1.0.2)
+    omniauth-rails_csrf_protection (1.0.0)
       actionpack (>= 4.2)
       omniauth (~> 2.0)
+    open4 (1.3.4)
     orm_adapter (0.5.0)
-    ostruct (0.6.1)
     paper_trail (16.0.0)
       activerecord (>= 6.1)
       request_store (~> 1.4)
@@ -370,116 +393,136 @@ GEM
     parser (3.3.9.0)
       ast (~> 2.4.1)
       racc
-    pdf-core (0.10.0)
+    pdf-core (0.9.0)
     pdf-inspector (1.3.0)
       pdf-reader (>= 1.0, < 3.0.a)
-    pdf-reader (2.13.0)
-      Ascii85 (>= 1.0, < 3.0, != 2.0.0)
+    pdf-reader (2.5.0)
+      Ascii85 (~> 1.0)
       afm (~> 0.2.1)
       hashery (~> 2.0)
       ruby-rc4
       ttfunk
     pg (1.6.1)
-    prawn (2.5.0)
-      matrix (~> 0.4)
-      pdf-core (~> 0.10.0)
-      ttfunk (~> 1.8)
+    pp (0.6.2)
+      prettyprint
+    prawn (2.4.0)
+      pdf-core (~> 0.9.0)
+      ttfunk (~> 1.7)
     prawn-qrcode (0.5.2)
       prawn (>= 1)
       rqrcode (>= 1.0.0)
-    prawn-rails (1.5.0)
+    prawn-rails (1.4.2)
       actionview (>= 3.1.0)
-      activesupport (>= 3.1.0)
       prawn
       prawn-table
     prawn-table (0.2.2)
       prawn (>= 1.3.0, < 3.0.0)
+    prettyprint (0.2.0)
     prism (1.4.0)
+    psych (5.2.6)
+      date
+      stringio
     public_suffix (6.0.2)
-    puma (6.5.0)
+    puma (4.3.8)
       nio4r (~> 2.0)
     racc (1.8.1)
     rack (2.2.17)
     rack-openid (1.4.2)
       rack (>= 1.1.0)
       ruby-openid (>= 2.1.8)
-    rack-protection (3.2.0)
-      base64 (>= 0.1.0)
-      rack (~> 2.2, >= 2.2.4)
-    rack-test (2.1.0)
+    rack-protection (2.1.0)
+      rack
+    rack-session (1.0.2)
+      rack (< 3)
+    rack-test (2.2.0)
       rack (>= 1.3)
-    rails (7.0.8.4)
-      actioncable (= 7.0.8.4)
-      actionmailbox (= 7.0.8.4)
-      actionmailer (= 7.0.8.4)
-      actionpack (= 7.0.8.4)
-      actiontext (= 7.0.8.4)
-      actionview (= 7.0.8.4)
-      activejob (= 7.0.8.4)
-      activemodel (= 7.0.8.4)
-      activerecord (= 7.0.8.4)
-      activestorage (= 7.0.8.4)
-      activesupport (= 7.0.8.4)
+    rackup (1.0.1)
+      rack (< 3)
+      webrick
+    rails (7.2.2.1)
+      actioncable (= 7.2.2.1)
+      actionmailbox (= 7.2.2.1)
+      actionmailer (= 7.2.2.1)
+      actionpack (= 7.2.2.1)
+      actiontext (= 7.2.2.1)
+      actionview (= 7.2.2.1)
+      activejob (= 7.2.2.1)
+      activemodel (= 7.2.2.1)
+      activerecord (= 7.2.2.1)
+      activestorage (= 7.2.2.1)
+      activesupport (= 7.2.2.1)
       bundler (>= 1.15.0)
-      railties (= 7.0.8.4)
+      railties (= 7.2.2.1)
     rails-controller-testing (1.0.5)
       actionpack (>= 5.0.1.rc1)
       actionview (>= 5.0.1.rc1)
       activesupport (>= 5.0.1.rc1)
-    rails-dom-testing (2.2.0)
+    rails-dom-testing (2.3.0)
       activesupport (>= 5.0.0)
       minitest
       nokogiri (>= 1.6)
     rails-html-sanitizer (1.6.2)
       loofah (~> 2.21)
       nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
-    rails-i18n (7.0.9)
+    rails-i18n (7.0.1)
       i18n (>= 0.7, < 2)
       railties (>= 6.0.0, < 8)
-    railties (7.0.8.4)
-      actionpack (= 7.0.8.4)
-      activesupport (= 7.0.8.4)
-      method_source
+    railties (7.2.2.1)
+      actionpack (= 7.2.2.1)
+      activesupport (= 7.2.2.1)
+      irb (~> 1.13)
+      rackup (>= 1.0.0)
       rake (>= 12.2)
-      thor (~> 1.0)
-      zeitwerk (~> 2.5)
+      thor (~> 1.0, >= 1.2.2)
+      zeitwerk (~> 2.6)
     rainbow (3.1.1)
-    rake (13.2.1)
-    recaptcha (5.18.0)
-    redcarpet (3.6.0)
+    rake (13.3.0)
+    rdoc (6.14.2)
+      erb
+      psych (>= 4.0.0)
+    recaptcha (5.8.1)
+      json
+    redcarpet (3.5.1)
     regexp_parser (2.11.1)
+    reline (0.6.2)
+      io-console (~> 0.5)
     request_store (1.7.0)
       rack (>= 1.4)
     responders (3.1.1)
       actionpack (>= 5.2)
       railties (>= 5.2)
+    rest-client (2.1.0)
+      http-accept (>= 1.7.0, < 2.0)
+      http-cookie (>= 1.0.2, < 2.0)
+      mime-types (>= 1.16, < 4.0)
+      netrc (~> 0.8)
     rexml (3.4.1)
-    rolify (6.0.1)
-    rqrcode (2.2.0)
+    rolify (6.0.0)
+    rqrcode (2.0.0)
       chunky_png (~> 1.0)
       rqrcode_core (~> 1.0)
-    rqrcode_core (1.2.0)
-    rspec-activemodel-mocks (1.2.1)
+    rqrcode_core (1.1.0)
+    rspec-activemodel-mocks (1.1.0)
       activemodel (>= 3.0)
       activesupport (>= 3.0)
       rspec-mocks (>= 2.99, < 4.0)
-    rspec-core (3.13.2)
+    rspec-core (3.13.5)
       rspec-support (~> 3.13.0)
-    rspec-expectations (3.13.3)
+    rspec-expectations (3.13.5)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
-    rspec-mocks (3.13.2)
+    rspec-mocks (3.13.5)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
-    rspec-rails (7.1.0)
-      actionpack (>= 7.0)
-      activesupport (>= 7.0)
-      railties (>= 7.0)
+    rspec-rails (8.0.2)
+      actionpack (>= 7.2)
+      activesupport (>= 7.2)
+      railties (>= 7.2)
       rspec-core (~> 3.13)
       rspec-expectations (~> 3.13)
       rspec-mocks (~> 3.13)
       rspec-support (~> 3.13)
-    rspec-support (3.13.2)
+    rspec-support (3.13.4)
     rubocop (1.79.2)
       json (~> 2.3)
       language_server-protocol (~> 3.17.0.2)
@@ -517,14 +560,16 @@ GEM
       lint_roller (~> 1.1)
       rubocop (~> 1.72, >= 1.72.1)
       rubocop-rspec (~> 3.5)
-    ruby-oembed (0.18.1)
+    ruby-oembed (0.15.0)
     ruby-openid (2.9.2)
     ruby-progressbar (1.13.0)
     ruby-rc4 (0.1.5)
-    ruby-vips (2.2.2)
+    ruby-vips (2.1.2)
       ffi (~> 1.12)
-      logger
-    rubyzip (2.3.2)
+    ruby2_keywords (0.0.5)
+    ruby_parser (3.17.0)
+      sexp_processor (~> 4.15, >= 4.15.1)
+    rubyzip (2.4.1)
     sass-rails (6.0.0)
       sassc-rails (~> 2.1, >= 2.1.1)
     sassc (2.4.0)
@@ -535,71 +580,70 @@ GEM
       sprockets (> 3.0)
       sprockets-rails
       tilt
+    securerandom (0.4.1)
     selectize-rails (0.12.6)
     selenium-webdriver (4.10.0)
       rexml (~> 3.2, >= 3.2.5)
       rubyzip (>= 1.2.2, < 3.0)
       websocket (~> 1.0)
-    sentry-rails (5.22.0)
+    sentry-rails (4.6.5)
       railties (>= 5.0)
-      sentry-ruby (~> 5.22.0)
-    sentry-ruby (5.22.0)
-      bigdecimal
-      concurrent-ruby (~> 1.0, >= 1.0.2)
-    shoulda-matchers (6.4.0)
-      activesupport (>= 5.2.0)
-    simple_po_parser (1.1.6)
-    simplecov (0.22.0)
+      sentry-ruby-core (~> 4.6.0)
+    sentry-ruby-core (4.6.5)
+      concurrent-ruby
+      faraday
+    sexp_processor (4.15.3)
+    shoulda-matchers (4.5.1)
+      activesupport (>= 4.2.0)
+    simplecov (0.21.2)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
       simplecov_json_formatter (~> 0.1)
-    simplecov-cobertura (2.1.0)
-      rexml
-      simplecov (~> 0.19)
-    simplecov-html (0.13.1)
-    simplecov_json_formatter (0.1.4)
-    snaky_hash (2.0.1)
-      hashie
-      version_gem (~> 1.1, >= 1.1.1)
-    sprockets (4.2.1)
+    simplecov-cobertura (1.4.2)
+      simplecov (~> 0.8)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.3)
+    sprockets (4.0.2)
       concurrent-ruby (~> 1.0)
-      rack (>= 2.2.4, < 4)
-    sprockets-rails (3.5.2)
-      actionpack (>= 6.1)
-      activesupport (>= 6.1)
+      rack (> 1, < 3)
+    sprockets-rails (3.2.2)
+      actionpack (>= 4.0)
+      activesupport (>= 4.0)
       sprockets (>= 3.0.0)
-    ssrf_filter (1.2.0)
-    stripe (5.55.0)
-    stripe-ruby-mock (3.1.0)
+    ssrf_filter (1.0.7)
+    stringio (3.1.7)
+    stripe (5.43.0)
+    stripe-ruby-mock (3.1.0.rc3)
       dante (>= 0.2.0)
       multi_json (~> 1.0)
       stripe (> 5, < 6)
     sysexits (1.2.0)
-    temple (0.10.3)
+    temple (0.8.2)
     thor (1.4.0)
-    tilt (2.4.0)
-    timecop (0.9.10)
+    tilt (2.0.10)
+    timecop (0.9.4)
     timeout (0.4.3)
-    transitions (1.3.0)
-    ttfunk (1.8.0)
-      bigdecimal (~> 3.1)
+    transitions (1.2.1)
+    ttfunk (1.7.0)
     turbolinks (5.2.1)
       turbolinks-source (~> 5.2)
     turbolinks-source (5.2.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    uglifier (4.2.1)
+    uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
+    unf (0.1.4)
+      unf_ext
+    unf_ext (0.0.7.7)
     unicode-display_width (3.1.4)
       unicode-emoji (~> 4.0, >= 4.0.4)
     unicode-emoji (4.0.4)
     unobtrusive_flash (3.3.1)
       railties
-    uri (1.0.3)
-    version_gem (1.1.4)
+    useragent (0.16.11)
     warden (1.2.9)
       rack (>= 2.0.9)
-    web-console (4.2.1)
+    web-console (4.1.0)
       actionview (>= 6.0.0)
       activemodel (>= 6.0.0)
       bindex (>= 0.4.0)
@@ -608,19 +652,21 @@ GEM
       nokogiri (~> 1.6)
       rubyzip (>= 1.3.0)
       selenium-webdriver (~> 4.0, < 4.11)
-    webmock (3.25.1)
+    webmock (3.14.0)
       addressable (>= 2.8.0)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)
+    webrick (1.9.1)
     websocket (1.2.11)
-    websocket-driver (0.7.6)
+    websocket-driver (0.8.0)
+      base64
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
     whenever (1.0.0)
       chronic (>= 0.6.3)
     xpath (3.2.0)
       nokogiri (~> 1.8)
-    zeitwerk (2.7.1)
+    zeitwerk (2.7.3)
 
 PLATFORMS
   ruby
@@ -644,7 +690,6 @@ DEPENDENCIES
   climate_control
   cloudinary
   cocoon
-  concurrent-ruby (= 1.3.4)
   countable-rails
   daemons
   dalli
@@ -689,7 +734,7 @@ DEPENDENCIES
   prawn-qrcode
   prawn-rails
   puma
-  rails (~> 7.0)
+  rails (~> 7.2)
   rails-controller-testing
   rails-i18n
   recaptcha
@@ -727,7 +772,7 @@ DEPENDENCIES
   whenever
 
 RUBY VERSION
-   ruby 3.3.7
+   ruby 3.3.9
 
 BUNDLED WITH
-   2.5.9
+   2.5.22
diff --git a/Gemfile.next.lock b/Gemfile.next.lock
index 0e8acc2e..b56f6e82 100644
--- a/Gemfile.next.lock
+++ b/Gemfile.next.lock
@@ -1,135 +1,119 @@
-GEM
-  remote: https://rails-assets.org/
-  specs:
-    rails-assets-bootstrap (3.4.1)
-      rails-assets-jquery (>= 1.9.1, < 4)
-    rails-assets-bootstrap-markdown (2.10.0)
-      rails-assets-bootstrap (~> 3)
-    rails-assets-bootstrap-select (1.13.10)
-      rails-assets-bootstrap (>= 3.0.0)
-      rails-assets-jquery (>= 1.9.1, < 4)
-    rails-assets-date.format (1.2.3)
-    rails-assets-holderjs (2.9.6)
-    rails-assets-jquery (3.4.1)
-    rails-assets-jquery-smooth-scroll (2.2.0)
-      rails-assets-jquery (>= 1.7.0)
-    rails-assets-markdown (0.5.0)
-    rails-assets-momentjs (2.22.2)
-    rails-assets-spectrum (1.8.0)
-      rails-assets-jquery (>= 1.7.2)
-    rails-assets-tinycolor (1.4.1)
-    rails-assets-to-markdown (3.1.1)
-    rails-assets-trianglify (1.2.0)
-    rails-assets-waypoints (4.0.1)
-
 GEM
   remote: https://rubygems.org/
   specs:
     Ascii85 (1.1.0)
-    actioncable (7.0.1)
-      actionpack (= 7.0.1)
-      activesupport (= 7.0.1)
+    actioncable (8.0.2)
+      actionpack (= 8.0.2)
+      activesupport (= 8.0.2)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
-    actionmailbox (7.0.1)
-      actionpack (= 7.0.1)
-      activejob (= 7.0.1)
-      activerecord (= 7.0.1)
-      activestorage (= 7.0.1)
-      activesupport (= 7.0.1)
-      mail (>= 2.7.1)
-      net-imap
-      net-pop
-      net-smtp
-    actionmailer (7.0.1)
-      actionpack (= 7.0.1)
-      actionview (= 7.0.1)
-      activejob (= 7.0.1)
-      activesupport (= 7.0.1)
-      mail (~> 2.5, >= 2.5.4)
-      net-imap
-      net-pop
-      net-smtp
-      rails-dom-testing (~> 2.0)
-    actionpack (7.0.1)
-      actionview (= 7.0.1)
-      activesupport (= 7.0.1)
-      rack (~> 2.0, >= 2.2.0)
+      zeitwerk (~> 2.6)
+    actionmailbox (8.0.2)
+      actionpack (= 8.0.2)
+      activejob (= 8.0.2)
+      activerecord (= 8.0.2)
+      activestorage (= 8.0.2)
+      activesupport (= 8.0.2)
+      mail (>= 2.8.0)
+    actionmailer (8.0.2)
+      actionpack (= 8.0.2)
+      actionview (= 8.0.2)
+      activejob (= 8.0.2)
+      activesupport (= 8.0.2)
+      mail (>= 2.8.0)
+      rails-dom-testing (~> 2.2)
+    actionpack (8.0.2)
+      actionview (= 8.0.2)
+      activesupport (= 8.0.2)
+      nokogiri (>= 1.8.5)
+      rack (>= 2.2.4)
+      rack-session (>= 1.0.1)
       rack-test (>= 0.6.3)
-      rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.2.0)
-    actiontext (7.0.1)
-      actionpack (= 7.0.1)
-      activerecord (= 7.0.1)
-      activestorage (= 7.0.1)
-      activesupport (= 7.0.1)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+      useragent (~> 0.16)
+    actiontext (8.0.2)
+      actionpack (= 8.0.2)
+      activerecord (= 8.0.2)
+      activestorage (= 8.0.2)
+      activesupport (= 8.0.2)
       globalid (>= 0.6.0)
       nokogiri (>= 1.8.5)
-    actionview (7.0.1)
-      activesupport (= 7.0.1)
+    actionview (8.0.2)
+      activesupport (= 8.0.2)
       builder (~> 3.1)
-      erubi (~> 1.4)
-      rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.1, >= 1.2.0)
-    active_model_serializers (0.10.13)
-      actionpack (>= 4.1, < 7.1)
-      activemodel (>= 4.1, < 7.1)
+      erubi (~> 1.11)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+    active_model_serializers (0.10.15)
+      actionpack (>= 4.1)
+      activemodel (>= 4.1)
       case_transform (>= 0.2)
       jsonapi-renderer (>= 0.1.1.beta1, < 0.3)
-    activejob (7.0.1)
-      activesupport (= 7.0.1)
+    activejob (8.0.2)
+      activesupport (= 8.0.2)
       globalid (>= 0.3.6)
-    activemodel (7.0.1)
-      activesupport (= 7.0.1)
-    activerecord (7.0.1)
-      activemodel (= 7.0.1)
-      activesupport (= 7.0.1)
-    activestorage (7.0.1)
-      actionpack (= 7.0.1)
-      activejob (= 7.0.1)
-      activerecord (= 7.0.1)
-      activesupport (= 7.0.1)
+    activemodel (8.0.2)
+      activesupport (= 8.0.2)
+    activerecord (8.0.2)
+      activemodel (= 8.0.2)
+      activesupport (= 8.0.2)
+      timeout (>= 0.4.0)
+    activestorage (8.0.2)
+      actionpack (= 8.0.2)
+      activejob (= 8.0.2)
+      activerecord (= 8.0.2)
+      activesupport (= 8.0.2)
       marcel (~> 1.0)
-      mini_mime (>= 1.1.0)
-    activesupport (7.0.1)
-      concurrent-ruby (~> 1.0, >= 1.0.2)
+    activesupport (8.0.2)
+      base64
+      benchmark (>= 0.3)
+      bigdecimal
+      concurrent-ruby (~> 1.0, >= 1.3.1)
+      connection_pool (>= 2.2.5)
+      drb
       i18n (>= 1.6, < 2)
+      logger (>= 1.4.2)
       minitest (>= 5.1)
-      tzinfo (~> 2.0)
+      securerandom (>= 0.3)
+      tzinfo (~> 2.0, >= 2.0.5)
+      uri (>= 0.13.1)
     acts_as_commentable_with_threading (1.2.0)
       activerecord (>= 3.0)
       activesupport (>= 3.0)
       awesome_nested_set (>= 2.0)
     acts_as_list (1.0.4)
       activerecord (>= 4.2)
-    addressable (2.8.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.7)
+      public_suffix (>= 2.0.2, < 7.0)
     afm (0.2.2)
     ajax-datatables-rails (1.3.1)
       zeitwerk
     archive-zip (0.12.0)
       io-like (~> 0.3.0)
-    ast (2.4.2)
+    ast (2.4.3)
     autoprefixer-rails (10.3.1.0)
       execjs (~> 2)
-    awesome_nested_set (3.5.0)
-      activerecord (>= 4.0.0, < 7.1)
+    awesome_nested_set (3.8.0)
+      activerecord (>= 4.0.0, < 8.1)
     aws_cf_signer (0.1.3)
-    bcrypt (3.1.16)
+    base64 (0.3.0)
+    bcrypt (3.1.20)
+    benchmark (0.4.1)
+    bigdecimal (3.2.2)
     bindex (0.8.1)
     bootstrap-sass (3.4.1)
       autoprefixer-rails (>= 5.2.1)
       sassc (>= 2.0.0)
-    bootstrap-switch-rails (3.3.5)
-    bootstrap3-datetimepicker-rails (4.17.47)
-      momentjs-rails (>= 2.8.1)
-    builder (3.2.4)
+    bootstrap-switch-rails (3.3.3)
+    builder (3.3.0)
     byebug (11.1.3)
     cancancan (3.3.0)
-    capybara (3.35.3)
+    capybara (3.40.0)
       addressable
+      matrix
       mini_mime (>= 0.1.3)
-      nokogiri (~> 1.8)
+      nokogiri (~> 1.11)
       rack (>= 1.6.0)
       rack-test (>= 0.6.3)
       regexp_parser (>= 1.5, < 3.0)
@@ -157,7 +141,8 @@ GEM
       actionpack (>= 3.1)
       caxlsx (>= 3.0)
     chartkick (4.1.3)
-    childprocess (3.0.0)
+    childprocess (5.1.0)
+      logger (~> 1.5)
     chronic (0.10.2)
     chunky_png (1.4.0)
     climate_control (1.0.1)
@@ -166,33 +151,29 @@ GEM
       rest-client (>= 2.0.0)
     cocoon (1.2.15)
     colorize (0.8.1)
-    concurrent-ruby (1.1.9)
+    concurrent-ruby (1.3.5)
+    connection_pool (2.5.3)
     countable-rails (0.0.1)
       railties (>= 3.1)
-    countries (4.0.1)
-      i18n_data (~> 0.13.0)
-      sixarm_ruby_unaccent (~> 1.1)
-    country_select (6.0.0)
-      countries (~> 4.0)
-      sort_alphabetical (~> 1.1)
     crack (0.4.5)
       rexml
     crass (1.0.6)
     daemons (1.4.0)
     dalli (2.7.11)
     dante (0.2.0)
-    database_cleaner (2.0.1)
-      database_cleaner-active_record (~> 2.0.0)
-    database_cleaner-active_record (2.0.1)
+    database_cleaner (2.1.0)
+      database_cleaner-active_record (>= 2, < 3)
+    database_cleaner-active_record (2.2.2)
       activerecord (>= 5.a)
-      database_cleaner-core (~> 2.0.0)
+      database_cleaner-core (~> 2.0)
     database_cleaner-core (2.0.1)
-    delayed_job (4.1.10)
-      activesupport (>= 3.0, < 8.0)
-    delayed_job_active_record (4.1.7)
-      activerecord (>= 3.0, < 8.0)
+    date (3.4.1)
+    delayed_job (4.1.13)
+      activesupport (>= 3.0, < 9.0)
+    delayed_job_active_record (4.1.11)
+      activerecord (>= 3.0, < 9.0)
       delayed_job (>= 3.0, < 5)
-    devise (4.8.1)
+    devise (4.9.4)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
       railties (>= 4.1.0)
@@ -200,8 +181,7 @@ GEM
       warden (~> 1.2.3)
     devise_ichain_authenticatable (0.3.2)
       devise (>= 2.2)
-    diff-lcs (1.4.4)
-    digest (3.1.0)
+    diff-lcs (1.6.2)
     docile (1.4.0)
     domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
@@ -209,7 +189,9 @@ GEM
     dotenv-rails (2.7.6)
       dotenv (= 2.7.6)
       railties (>= 3.2)
-    erubi (1.10.0)
+    drb (2.2.3)
+    erb (5.0.2)
+    erubi (1.13.1)
     erubis (2.7.0)
     execjs (2.8.1)
     factory_bot (6.2.0)
@@ -241,12 +223,12 @@ GEM
     fastimage (2.2.5)
     feature (1.4.0)
     ffi (1.15.3)
-    font-awesome-rails (4.7.0.8)
-      railties (>= 3.2, < 8.0)
+    font-awesome-sass (6.7.2)
+      sassc (~> 2.0)
     geckodriver-helper (0.24.0)
       archive-zip (~> 0.7)
-    globalid (1.0.0)
-      activesupport (>= 5.0)
+    globalid (1.2.1)
+      activesupport (>= 6.1)
     gravtastic (3.2.6)
     haml (5.2.2)
       temple (>= 0.8.0)
@@ -275,7 +257,7 @@ GEM
     http-accept (1.7.0)
     http-cookie (1.0.4)
       domain_name (~> 0.5)
-    i18n (1.9.1)
+    i18n (1.14.7)
       concurrent-ruby (~> 1.0)
     i18n_data (0.13.0)
     icalendar (2.7.1)
@@ -284,8 +266,12 @@ GEM
     image_processing (1.12.1)
       mini_magick (>= 4.9.5, < 5)
       ruby-vips (>= 2.0.17, < 3)
+    io-console (0.8.1)
     io-like (0.3.1)
-    io-wait (0.2.1)
+    irb (1.15.2)
+      pp (>= 0.6.0)
+      rdoc (>= 4.0.0)
+      reline (>= 0.4.2)
     iso-639 (0.3.5)
     jquery-datatables-rails (3.4.0)
       actionpack (>= 3.1)
@@ -303,25 +289,38 @@ GEM
       addressable (>= 2.4)
     jsonapi-renderer (0.2.2)
     jwt (2.2.3)
-    launchy (2.5.0)
-      addressable (~> 2.7)
-    leaflet-rails (1.7.0)
-      rails (>= 4.2.0)
-    letter_opener (1.7.0)
-      launchy (~> 2.2)
-    letter_opener_web (2.0.0)
-      actionmailer (>= 5.2)
-      letter_opener (~> 1.7)
-      railties (>= 5.2)
+    language_server-protocol (3.17.0.5)
+    launchy (3.1.1)
+      addressable (~> 2.8)
+      childprocess (~> 5.0)
+      logger (~> 1.6)
+    leaflet-rails (1.9.5)
+      actionpack (>= 4.2.0)
+      railties (>= 4.2.0)
+    letter_opener (1.10.0)
+      launchy (>= 2.2, < 4)
+    letter_opener_web (3.0.0)
+      actionmailer (>= 6.1)
+      letter_opener (~> 1.9)
+      railties (>= 6.1)
       rexml
-    loofah (2.13.0)
+    lint_roller (1.1.0)
+    logger (1.7.0)
+    lograge (0.14.0)
+      actionpack (>= 4)
+      activesupport (>= 4)
+      railties (>= 4)
+      request_store (~> 1.0)
+    loofah (2.24.1)
       crass (~> 1.0.2)
-      nokogiri (>= 1.5.9)
-    mail (2.7.1)
+      nokogiri (>= 1.12.0)
+    mail (2.8.1)
       mini_mime (>= 0.1.1)
-    marcel (1.0.1)
+      net-imap
+      net-pop
+      net-smtp
+    marcel (1.0.4)
     matrix (0.4.2)
-    method_source (1.0.0)
     mime-types (3.3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2021.0704)
@@ -329,11 +328,9 @@ GEM
       open4 (~> 1.3.4)
       rake
     mini_magick (4.11.0)
-    mini_mime (1.1.2)
-    mini_portile2 (2.7.1)
-    minitest (5.15.0)
-    momentjs-rails (2.20.1)
-      railties (>= 3.1)
+    mini_mime (1.1.5)
+    mini_portile2 (2.8.9)
+    minitest (5.25.5)
     monetize (1.9.4)
       money (~> 6.12)
     money (6.13.8)
@@ -346,28 +343,21 @@ GEM
     multi_json (1.15.0)
     multi_xml (0.6.0)
     multipart-post (2.1.1)
-    mysql2 (0.5.3)
-    net-imap (0.2.3)
-      digest
+    net-imap (0.5.9)
+      date
       net-protocol
-      strscan
-    net-pop (0.1.1)
-      digest
+    net-pop (0.1.2)
       net-protocol
+    net-protocol (0.2.2)
       timeout
-    net-protocol (0.1.2)
-      io-wait
-      timeout
-    net-smtp (0.3.1)
-      digest
+    net-smtp (0.5.1)
       net-protocol
-      timeout
     netrc (0.11.0)
     next_rails (1.0.4)
       colorize (>= 0.8.1)
-    nio4r (2.5.8)
-    nokogiri (1.13.1)
-      mini_portile2 (~> 2.7.0)
+    nio4r (2.7.4)
+    nokogiri (1.18.9)
+      mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     oauth2 (1.4.7)
       faraday (>= 0.8, < 2.0)
@@ -400,12 +390,13 @@ GEM
       omniauth (~> 2.0)
     open4 (1.3.4)
     orm_adapter (0.5.0)
-    paper_trail (12.2.0)
-      activerecord (>= 5.2)
-      request_store (~> 1.1)
-    parallel (1.21.0)
-    parser (3.1.0.0)
+    paper_trail (16.0.0)
+      activerecord (>= 6.1)
+      request_store (~> 1.4)
+    parallel (1.27.0)
+    parser (3.3.9.0)
       ast (~> 2.4.1)
+      racc
     pdf-core (0.9.0)
     pdf-inspector (1.3.0)
       pdf-reader (>= 1.0, < 3.0.a)
@@ -415,7 +406,9 @@ GEM
       hashery (~> 2.0)
       ruby-rc4
       ttfunk
-    pg (1.2.3)
+    pg (1.6.1)
+    pp (0.6.2)
+      prettyprint
     prawn (2.4.0)
       pdf-core (~> 0.9.0)
       ttfunk (~> 1.7)
@@ -428,68 +421,86 @@ GEM
       prawn-table
     prawn-table (0.2.2)
       prawn (>= 1.3.0, < 3.0.0)
-    public_suffix (4.0.6)
+    prettyprint (0.2.0)
+    prism (1.4.0)
+    psych (5.2.6)
+      date
+      stringio
+    public_suffix (6.0.2)
     puma (4.3.8)
       nio4r (~> 2.0)
-    racc (1.6.0)
-    rack (2.2.3)
+    racc (1.8.1)
+    rack (2.2.17)
     rack-openid (1.4.2)
       rack (>= 1.1.0)
       ruby-openid (>= 2.1.8)
     rack-protection (2.1.0)
       rack
-    rack-test (1.1.0)
-      rack (>= 1.0, < 3)
-    rails (7.0.1)
-      actioncable (= 7.0.1)
-      actionmailbox (= 7.0.1)
-      actionmailer (= 7.0.1)
-      actionpack (= 7.0.1)
-      actiontext (= 7.0.1)
-      actionview (= 7.0.1)
-      activejob (= 7.0.1)
-      activemodel (= 7.0.1)
-      activerecord (= 7.0.1)
-      activestorage (= 7.0.1)
-      activesupport (= 7.0.1)
+    rack-session (1.0.2)
+      rack (< 3)
+    rack-test (2.2.0)
+      rack (>= 1.3)
+    rackup (1.0.1)
+      rack (< 3)
+      webrick
+    rails (8.0.2)
+      actioncable (= 8.0.2)
+      actionmailbox (= 8.0.2)
+      actionmailer (= 8.0.2)
+      actionpack (= 8.0.2)
+      actiontext (= 8.0.2)
+      actionview (= 8.0.2)
+      activejob (= 8.0.2)
+      activemodel (= 8.0.2)
+      activerecord (= 8.0.2)
+      activestorage (= 8.0.2)
+      activesupport (= 8.0.2)
       bundler (>= 1.15.0)
-      railties (= 7.0.1)
+      railties (= 8.0.2)
     rails-controller-testing (1.0.5)
       actionpack (>= 5.0.1.rc1)
       actionview (>= 5.0.1.rc1)
       activesupport (>= 5.0.1.rc1)
-    rails-dom-testing (2.0.3)
-      activesupport (>= 4.2.0)
+    rails-dom-testing (2.3.0)
+      activesupport (>= 5.0.0)
+      minitest
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.4.2)
-      loofah (~> 2.3)
-    rails-i18n (7.0.1)
+    rails-html-sanitizer (1.6.2)
+      loofah (~> 2.21)
+      nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
+    rails-i18n (8.0.1)
       i18n (>= 0.7, < 2)
-      railties (>= 6.0.0, < 8)
-    railties (7.0.1)
-      actionpack (= 7.0.1)
-      activesupport (= 7.0.1)
-      method_source
+      railties (>= 8.0.0, < 9)
+    railties (8.0.2)
+      actionpack (= 8.0.2)
+      activesupport (= 8.0.2)
+      irb (~> 1.13)
+      rackup (>= 1.0.0)
       rake (>= 12.2)
-      thor (~> 1.0)
-      zeitwerk (~> 2.5)
+      thor (~> 1.0, >= 1.2.2)
+      zeitwerk (~> 2.6)
     rainbow (3.1.1)
-    rake (13.0.6)
+    rake (13.3.0)
+    rdoc (6.14.2)
+      erb
+      psych (>= 4.0.0)
     recaptcha (5.8.1)
       json
     redcarpet (3.5.1)
-    regexp_parser (2.2.0)
-    request_store (1.5.1)
+    regexp_parser (2.11.1)
+    reline (0.6.2)
+      io-console (~> 0.5)
+    request_store (1.7.0)
       rack (>= 1.4)
-    responders (3.0.1)
-      actionpack (>= 5.0)
-      railties (>= 5.0)
+    responders (3.1.1)
+      actionpack (>= 5.2)
+      railties (>= 5.2)
     rest-client (2.1.0)
       http-accept (>= 1.7.0, < 2.0)
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
-    rexml (3.2.5)
+    rexml (3.4.1)
     rolify (6.0.0)
     rqrcode (2.0.0)
       chunky_png (~> 1.0)
@@ -499,34 +510,47 @@ GEM
       activemodel (>= 3.0)
       activesupport (>= 3.0)
       rspec-mocks (>= 2.99, < 4.0)
-    rspec-core (3.10.1)
-      rspec-support (~> 3.10.0)
-    rspec-expectations (3.10.1)
+    rspec-core (3.13.5)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.5)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.10.0)
-    rspec-mocks (3.10.2)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.5)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.10.0)
-    rspec-rails (5.0.2)
-      actionpack (>= 5.2)
-      activesupport (>= 5.2)
-      railties (>= 5.2)
-      rspec-core (~> 3.10)
-      rspec-expectations (~> 3.10)
-      rspec-mocks (~> 3.10)
-      rspec-support (~> 3.10)
-    rspec-support (3.10.2)
-    rubocop (1.25.1)
+      rspec-support (~> 3.13.0)
+    rspec-rails (8.0.2)
+      actionpack (>= 7.2)
+      activesupport (>= 7.2)
+      railties (>= 7.2)
+      rspec-core (~> 3.13)
+      rspec-expectations (~> 3.13)
+      rspec-mocks (~> 3.13)
+      rspec-support (~> 3.13)
+    rspec-support (3.13.4)
+    rubocop (1.79.2)
+      json (~> 2.3)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.1.0)
       parallel (~> 1.10)
-      parser (>= 3.1.0.0)
+      parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 1.8, < 3.0)
-      rexml
-      rubocop-ast (>= 1.15.1, < 2.0)
+      regexp_parser (>= 2.9.3, < 3.0)
+      rubocop-ast (>= 1.46.0, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.15.1)
-      parser (>= 3.0.1.1)
+      unicode-display_width (>= 2.4.0, < 4.0)
+    rubocop-ast (1.46.0)
+      parser (>= 3.3.7.2)
+      prism (~> 1.4)
+    rubocop-capybara (2.22.1)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+    rubocop-factory_bot (2.27.1)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+    rubocop-performance (1.25.0)
+      lint_roller (~> 1.1)
+      rubocop (>= 1.75.0, < 2.0)
+      rubocop-ast (>= 1.38.0, < 2.0)
     rubocop-rails (2.11.3)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
@@ -534,16 +558,18 @@ GEM
     rubocop-rspec (2.4.0)
       rubocop (~> 1.0)
       rubocop-ast (>= 1.1.0)
+    rubocop-rspec_rails (2.29.1)
+      rubocop (~> 1.61)
     ruby-oembed (0.15.0)
     ruby-openid (2.9.2)
-    ruby-progressbar (1.11.0)
+    ruby-progressbar (1.13.0)
     ruby-rc4 (0.1.5)
     ruby-vips (2.1.2)
       ffi (~> 1.12)
     ruby2_keywords (0.0.5)
     ruby_parser (3.17.0)
       sexp_processor (~> 4.15, >= 4.15.1)
-    rubyzip (2.3.2)
+    rubyzip (2.4.1)
     sass-rails (6.0.0)
       sassc-rails (~> 2.1, >= 2.1.1)
     sassc (2.4.0)
@@ -554,10 +580,12 @@ GEM
       sprockets (> 3.0)
       sprockets-rails
       tilt
+    securerandom (0.4.1)
     selectize-rails (0.12.6)
-    selenium-webdriver (3.142.7)
-      childprocess (>= 0.5, < 4.0)
-      rubyzip (>= 1.2.2)
+    selenium-webdriver (4.10.0)
+      rexml (~> 3.2, >= 3.2.5)
+      rubyzip (>= 1.2.2, < 3.0)
+      websocket (~> 1.0)
     sentry-rails (4.6.5)
       railties (>= 5.0)
       sentry-ruby-core (~> 4.6.0)
@@ -575,11 +603,6 @@ GEM
       simplecov (~> 0.8)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.3)
-    sixarm_ruby_unaccent (1.2.0)
-    skylight (5.1.0)
-      activesupport (>= 5.2.0)
-    sort_alphabetical (1.1.0)
-      unicode_utils (>= 1.2.2)
     sprockets (4.0.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
@@ -587,36 +610,38 @@ GEM
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
-    sqlite3 (1.4.2)
     ssrf_filter (1.0.7)
+    stringio (3.1.7)
     stripe (5.43.0)
     stripe-ruby-mock (3.1.0.rc3)
       dante (>= 0.2.0)
       multi_json (~> 1.0)
       stripe (> 5, < 6)
-    strscan (3.0.1)
     sysexits (1.2.0)
     temple (0.8.2)
-    thor (1.2.1)
+    thor (1.4.0)
     tilt (2.0.10)
     timecop (0.9.4)
-    timeout (0.2.0)
+    timeout (0.4.3)
     transitions (1.2.1)
     ttfunk (1.7.0)
     turbolinks (5.2.1)
       turbolinks-source (~> 5.2)
     turbolinks-source (5.2.0)
-    tzinfo (2.0.4)
+    tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.7)
-    unicode-display_width (2.1.0)
-    unicode_utils (1.4.0)
+    unicode-display_width (3.1.4)
+      unicode-emoji (~> 4.0, >= 4.0.4)
+    unicode-emoji (4.0.4)
     unobtrusive_flash (3.3.1)
       railties
+    uri (1.0.3)
+    useragent (0.16.11)
     warden (1.2.9)
       rack (>= 2.0.9)
     web-console (4.1.0)
@@ -624,22 +649,25 @@ GEM
       activemodel (>= 6.0.0)
       bindex (>= 0.4.0)
       railties (>= 6.0.0)
-    webdrivers (4.6.0)
+    webdrivers (5.3.1)
       nokogiri (~> 1.6)
       rubyzip (>= 1.3.0)
-      selenium-webdriver (>= 3.0, < 4.0)
+      selenium-webdriver (~> 4.0, < 4.11)
     webmock (3.14.0)
       addressable (>= 2.8.0)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)
-    websocket-driver (0.7.5)
+    webrick (1.9.1)
+    websocket (1.2.11)
+    websocket-driver (0.8.0)
+      base64
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
     whenever (1.0.0)
       chronic (>= 0.6.3)
     xpath (3.2.0)
       nokogiri (~> 1.8)
-    zeitwerk (2.5.4)
+    zeitwerk (2.7.3)
 
 PLATFORMS
   ruby
@@ -652,8 +680,7 @@ DEPENDENCIES
   autoprefixer-rails
   awesome_nested_set
   bootstrap-sass (~> 3.4.0)
-  bootstrap-switch-rails (~> 3.3.5)
-  bootstrap3-datetimepicker-rails (~> 4.17.47)
+  bootstrap-switch-rails (= 3.3.3)
   byebug
   cancancan
   capybara
@@ -665,7 +692,6 @@ DEPENDENCIES
   cloudinary
   cocoon
   countable-rails
-  country_select
   daemons
   dalli
   database_cleaner
@@ -676,27 +702,27 @@ DEPENDENCIES
   factory_bot_rails
   faker
   feature
-  font-awesome-rails
+  font-awesome-sass
   geckodriver-helper
   gravtastic
   haml-rails
   haml_lint
+  i18n_data
   icalendar
   iso-639
   jquery-datatables-rails
   jquery-rails
-  jquery-ui-rails (~> 6.0.1)
+  jquery-ui-rails
   json-schema
   leaflet-rails
   letter_opener
   letter_opener_web
+  lograge
   matrix (~> 0.4)
   mina
   mini_magick
   money-rails
-  mysql2
   next_rails
-  nokogiri (>= 1.8.1)
   omniauth
   omniauth-facebook
   omniauth-github
@@ -708,41 +734,32 @@ DEPENDENCIES
   pg
   prawn-qrcode
   prawn-rails
-  puma (~> 4.3)
-  rails (~> 7)
-  rails-assets-bootstrap-markdown!
-  rails-assets-bootstrap-select!
-  rails-assets-date.format!
-  rails-assets-holderjs!
-  rails-assets-jquery-smooth-scroll!
-  rails-assets-markdown!
-  rails-assets-momentjs!
-  rails-assets-spectrum!
-  rails-assets-tinycolor!
-  rails-assets-to-markdown (~> 3)!
-  rails-assets-trianglify!
-  rails-assets-waypoints!
+  puma
+  rails (~> 8.0)
   rails-controller-testing
   rails-i18n
   recaptcha
   redcarpet
   responders (~> 3.0)
+  rexml
   rolify
   rqrcode
   rspec-activemodel-mocks
   rspec-rails
   rubocop
+  rubocop-capybara
+  rubocop-factory_bot
+  rubocop-performance
   rubocop-rails
   rubocop-rspec
+  rubocop-rspec_rails
   ruby-oembed
   sass-rails (>= 4.0.2)
   selectize-rails
   sentry-rails
   shoulda-matchers
   simplecov-cobertura
-  skylight
   sprockets-rails
-  sqlite3
   stripe
   stripe-ruby-mock (~> 3.1.0.rc3)
   timecop
@@ -756,7 +773,7 @@ DEPENDENCIES
   whenever
 
 RUBY VERSION
-   ruby 3.1.0
+   ruby 3.3.9p170
 
 BUNDLED WITH
    2.3.3
diff --git a/app/lib/rails_version.rb b/app/lib/rails_version.rb
index 415b141f..167871aa 100644
--- a/app/lib/rails_version.rb
+++ b/app/lib/rails_version.rb
@@ -9,6 +9,6 @@
 # Matching on major and minor versions should be enough for most migrations.
 module RailsVersion
   def self.next?
-    Rails::VERSION::MAJOR == 7 && Rails::VERSION::MINOR == 2
+    Rails::VERSION::MAJOR == 8 && Rails::VERSION::MINOR == 0
   end
 end
diff --git a/app/models/conference.rb b/app/models/conference.rb
index 46505572..6efd70b0 100644
--- a/app/models/conference.rb
+++ b/app/models/conference.rb
@@ -4,7 +4,9 @@ class Conference < ApplicationRecord
   include RevisionCount
 
   require 'uri'
-  serialize :events_per_week, Hash
+
+  serialize :events_per_week, type: Hash
+
   # Needed to call 'Conference.with_role' in /models/ability.rb
   # Dependent destroy will fail as roles#destroy will be cancelled,hence delete_all
   resourcify :roles, dependent: :delete_all
@@ -826,7 +828,7 @@ class Conference < ApplicationRecord
           unless result[state.to_s.capitalize]
             result[state.to_s.capitalize] = {}
           end
-          result[state.to_s.capitalize][week.strftime('%W').to_i] = value
+          result[state.to_s.capitalize][DateTime.parse(week).strftime('%W').to_i] = value
         end
       end
     end
diff --git a/config/application.rb b/config/application.rb
index fc72c02c..3dee15b9 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -36,6 +36,6 @@ module Osem
     # This is a nightmare with our current data model, no one ever thought about this.
     config.active_record.belongs_to_required_by_default = false
     # https://discuss.rubyonrails.org/t/cve-2022-32224-possible-rce-escalation-bug-with-serialized-columns-in-active-record/81017
-    config.active_record.yaml_column_permitted_classes = ['Date', 'DateTime', 'Symbol', 'Time', 'ActiveSupport::TimeWithZone', 'ActiveSupport::TimeZone']
+    config.active_record.yaml_column_permitted_classes = [Date, DateTime, Symbol, Time, ActiveSupport::TimeWithZone, ActiveSupport::TimeZone]
   end
 end