Show OIDC env vars on application show page under a toggle

Previously the copy-pasteable env-var block only appeared right after
creating an app or regenerating credentials. Operators had no easy way
back to it, so they had to reconstruct OIDC_DISCOVERY_URL etc. from
memory.

Adds a collapsed <details> disclosure inside the OIDC Configuration
card with the same env vars (placeholder for the secret, which can't
be re-shown). Extracts the env-line construction into an
oidc_env_lines helper so the flash panel and the persistent display
share one source of truth.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.ruby-version

@@ -1 +1 @@
-4.0.1
+4.0.3

Dockerfile

@@ -8,7 +8,7 @@
 # For a containerized dev environment, see Dev Containers: https://guides.rubyonrails.org/getting_started_with_devcontainer.html
 
 # Make sure RUBY_VERSION matches the Ruby version in .ruby-version
-ARG RUBY_VERSION=4.0.1
+ARG RUBY_VERSION=4.0.3
 FROM docker.io/library/ruby:$RUBY_VERSION-slim AS base
 
 LABEL org.opencontainers.image.source=https://github.com/dkam/clinch

Gemfile

@@ -1,7 +1,7 @@
 source "https://rubygems.org"
 
 # Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main"
-gem "rails", "~> 8.1.2"
+gem "rails", "~> 8.1.3"
 # The modern asset pipeline for Rails [https://github.com/rails/propshaft]
 gem "propshaft"
 # Use sqlite3 as the database for Active Record

Gemfile.lock

@@ -1,31 +1,31 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    action_text-trix (2.1.16)
+    action_text-trix (2.1.18)
       railties
-    actioncable (8.1.2)
+    actioncable (8.1.3)
-      actionpack (= 8.1.2)
+      actionpack (= 8.1.3)
-      activesupport (= 8.1.2)
+      activesupport (= 8.1.3)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
       zeitwerk (~> 2.6)
-    actionmailbox (8.1.2)
+    actionmailbox (8.1.3)
-      actionpack (= 8.1.2)
+      actionpack (= 8.1.3)
-      activejob (= 8.1.2)
+      activejob (= 8.1.3)
-      activerecord (= 8.1.2)
+      activerecord (= 8.1.3)
-      activestorage (= 8.1.2)
+      activestorage (= 8.1.3)
-      activesupport (= 8.1.2)
+      activesupport (= 8.1.3)
       mail (>= 2.8.0)
-    actionmailer (8.1.2)
+    actionmailer (8.1.3)
-      actionpack (= 8.1.2)
+      actionpack (= 8.1.3)
-      actionview (= 8.1.2)
+      actionview (= 8.1.3)
-      activejob (= 8.1.2)
+      activejob (= 8.1.3)
-      activesupport (= 8.1.2)
+      activesupport (= 8.1.3)
       mail (>= 2.8.0)
       rails-dom-testing (~> 2.2)
-    actionpack (8.1.2)
+    actionpack (8.1.3)
-      actionview (= 8.1.2)
+      actionview (= 8.1.3)
-      activesupport (= 8.1.2)
+      activesupport (= 8.1.3)
       nokogiri (>= 1.8.5)
       rack (>= 2.2.4)
       rack-session (>= 1.0.1)
@@ -33,36 +33,36 @@ GEM
       rails-dom-testing (~> 2.2)
       rails-html-sanitizer (~> 1.6)
       useragent (~> 0.16)
-    actiontext (8.1.2)
+    actiontext (8.1.3)
       action_text-trix (~> 2.1.15)
-      actionpack (= 8.1.2)
+      actionpack (= 8.1.3)
-      activerecord (= 8.1.2)
+      activerecord (= 8.1.3)
-      activestorage (= 8.1.2)
+      activestorage (= 8.1.3)
-      activesupport (= 8.1.2)
+      activesupport (= 8.1.3)
       globalid (>= 0.6.0)
       nokogiri (>= 1.8.5)
-    actionview (8.1.2)
+    actionview (8.1.3)
-      activesupport (= 8.1.2)
+      activesupport (= 8.1.3)
       builder (~> 3.1)
       erubi (~> 1.11)
       rails-dom-testing (~> 2.2)
       rails-html-sanitizer (~> 1.6)
-    activejob (8.1.2)
+    activejob (8.1.3)
-      activesupport (= 8.1.2)
+      activesupport (= 8.1.3)
       globalid (>= 0.3.6)
-    activemodel (8.1.2)
+    activemodel (8.1.3)
-      activesupport (= 8.1.2)
+      activesupport (= 8.1.3)
-    activerecord (8.1.2)
+    activerecord (8.1.3)
-      activemodel (= 8.1.2)
+      activemodel (= 8.1.3)
-      activesupport (= 8.1.2)
+      activesupport (= 8.1.3)
       timeout (>= 0.4.0)
-    activestorage (8.1.2)
+    activestorage (8.1.3)
-      actionpack (= 8.1.2)
+      actionpack (= 8.1.3)
-      activejob (= 8.1.2)
+      activejob (= 8.1.3)
-      activerecord (= 8.1.2)
+      activerecord (= 8.1.3)
-      activesupport (= 8.1.2)
+      activesupport (= 8.1.3)
       marcel (~> 1.0)
-    activesupport (8.1.2)
+    activesupport (8.1.3)
       base64
       bigdecimal
       concurrent-ruby (~> 1.0, >= 1.3.1)
@@ -75,19 +75,19 @@ GEM
       securerandom (>= 0.3)
       tzinfo (~> 2.0, >= 2.0.5)
       uri (>= 0.13.1)
-    addressable (2.8.8)
+    addressable (2.9.0)
       public_suffix (>= 2.0.2, < 8.0)
     android_key_attestation (0.3.0)
     ast (2.4.3)
     base64 (0.3.0)
-    bcrypt (3.1.21)
+    bcrypt (3.1.22)
     bcrypt_pbkdf (1.1.2)
-    bigdecimal (4.0.1)
+    bigdecimal (4.1.2)
     bindata (2.5.1)
     bindex (0.8.1)
-    bootsnap (1.20.1)
+    bootsnap (1.24.1)
       msgpack (~> 1.2)
-    brakeman (7.1.2)
+    brakeman (8.0.4)
       racc
     builder (3.3.0)
     bundler-audit (0.9.3)
@@ -102,7 +102,7 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
-    cbor (0.5.10.1)
+    cbor (0.5.10.2)
     childprocess (5.1.0)
       logger (~> 1.5)
     chunky_png (1.4.0)
@@ -120,17 +120,17 @@ GEM
     dotenv (3.2.0)
     drb (2.2.3)
     ed25519 (1.4.0)
-    erb (6.0.2)
+    erb (6.0.4)
     erubi (1.13.1)
     et-orbi (1.4.0)
       tzinfo
-    ffi (1.17.3-aarch64-linux-gnu)
+    ffi (1.17.4-aarch64-linux-gnu)
-    ffi (1.17.3-aarch64-linux-musl)
+    ffi (1.17.4-aarch64-linux-musl)
-    ffi (1.17.3-arm-linux-gnu)
+    ffi (1.17.4-arm-linux-gnu)
-    ffi (1.17.3-arm-linux-musl)
+    ffi (1.17.4-arm-linux-musl)
-    ffi (1.17.3-arm64-darwin)
+    ffi (1.17.4-arm64-darwin)
-    ffi (1.17.3-x86_64-linux-gnu)
+    ffi (1.17.4-x86_64-linux-gnu)
-    ffi (1.17.3-x86_64-linux-musl)
+    ffi (1.17.4-x86_64-linux-musl)
     fugit (1.12.1)
       et-orbi (~> 1.4)
       raabro (~> 1.4)
@@ -141,12 +141,12 @@ GEM
     image_processing (1.14.0)
       mini_magick (>= 4.9.5, < 6)
       ruby-vips (>= 2.0.17, < 3)
-    importmap-rails (2.2.2)
+    importmap-rails (2.2.3)
       actionpack (>= 6.0.0)
       activesupport (>= 6.0.0)
       railties (>= 6.0.0)
     io-console (0.8.2)
-    irb (1.17.0)
+    irb (1.18.0)
       pp (>= 0.6.0)
       prism (>= 1.3.0)
       rdoc (>= 4.0.0)
@@ -154,10 +154,10 @@ GEM
     jbuilder (2.14.1)
       actionview (>= 7.0.0)
       activesupport (>= 7.0.0)
-    json (2.19.0)
+    json (2.19.4)
     jwt (3.1.2)
       base64
-    kamal (2.10.1)
+    kamal (2.11.0)
       activesupport (>= 7.0)
       base64 (~> 0.2)
       bcrypt_pbkdf (~> 1.0)
@@ -177,7 +177,7 @@ GEM
       launchy (>= 2.2, < 4)
     lint_roller (1.1.0)
     logger (1.7.0)
-    loofah (2.25.0)
+    loofah (2.25.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
     mail (2.9.0)
@@ -193,7 +193,7 @@ GEM
     mini_mime (1.1.5)
     minitest (5.27.0)
     msgpack (1.8.0)
-    net-imap (0.6.3)
+    net-imap (0.6.4)
       date
       net-protocol
     net-pop (0.1.2)
@@ -206,68 +206,68 @@ GEM
       net-ssh (>= 5.0.0, < 8.0.0)
     net-smtp (0.5.1)
       net-protocol
-    net-ssh (7.3.0)
+    net-ssh (7.3.2)
     nio4r (2.7.5)
-    nokogiri (1.19.1-aarch64-linux-gnu)
+    nokogiri (1.19.3-aarch64-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.19.1-aarch64-linux-musl)
+    nokogiri (1.19.3-aarch64-linux-musl)
       racc (~> 1.4)
-    nokogiri (1.19.1-arm-linux-gnu)
+    nokogiri (1.19.3-arm-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.19.1-arm-linux-musl)
+    nokogiri (1.19.3-arm-linux-musl)
       racc (~> 1.4)
-    nokogiri (1.19.1-arm64-darwin)
+    nokogiri (1.19.3-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.19.1-x86_64-linux-gnu)
+    nokogiri (1.19.3-x86_64-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.19.1-x86_64-linux-musl)
+    nokogiri (1.19.3-x86_64-linux-musl)
       racc (~> 1.4)
-    openssl (4.0.0)
+    openssl (4.0.1)
     openssl-signature_algorithm (1.3.0)
       openssl (> 2.0)
     ostruct (0.6.3)
-    parallel (1.27.0)
+    parallel (1.28.0)
-    parser (3.3.10.0)
+    parser (3.3.11.1)
       ast (~> 2.4.1)
       racc
     pp (0.6.3)
       prettyprint
     prettyprint (0.2.0)
-    prism (1.7.0)
+    prism (1.9.0)
-    propshaft (1.3.1)
+    propshaft (1.3.2)
       actionpack (>= 7.0.0)
       activesupport (>= 7.0.0)
       rack
     psych (5.3.1)
       date
       stringio
-    public_suffix (7.0.0)
+    public_suffix (7.0.5)
-    puma (7.1.0)
+    puma (8.0.1)
       nio4r (~> 2.0)
     raabro (1.4.0)
     racc (1.8.1)
-    rack (3.2.5)
+    rack (3.2.6)
-    rack-session (2.1.1)
+    rack-session (2.1.2)
       base64 (>= 0.1.0)
       rack (>= 3.0.0)
     rack-test (2.2.0)
       rack (>= 1.3)
     rackup (2.3.1)
       rack (>= 3)
-    rails (8.1.2)
+    rails (8.1.3)
-      actioncable (= 8.1.2)
+      actioncable (= 8.1.3)
-      actionmailbox (= 8.1.2)
+      actionmailbox (= 8.1.3)
-      actionmailer (= 8.1.2)
+      actionmailer (= 8.1.3)
-      actionpack (= 8.1.2)
+      actionpack (= 8.1.3)
-      actiontext (= 8.1.2)
+      actiontext (= 8.1.3)
-      actionview (= 8.1.2)
+      actionview (= 8.1.3)
-      activejob (= 8.1.2)
+      activejob (= 8.1.3)
-      activemodel (= 8.1.2)
+      activemodel (= 8.1.3)
-      activerecord (= 8.1.2)
+      activerecord (= 8.1.3)
-      activestorage (= 8.1.2)
+      activestorage (= 8.1.3)
-      activesupport (= 8.1.2)
+      activesupport (= 8.1.3)
       bundler (>= 1.15.0)
-      railties (= 8.1.2)
+      railties (= 8.1.3)
     rails-dom-testing (2.3.0)
       activesupport (>= 5.0.0)
       minitest
@@ -275,9 +275,9 @@ GEM
     rails-html-sanitizer (1.7.0)
       loofah (~> 2.25)
       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)
-    railties (8.1.2)
+    railties (8.1.3)
-      actionpack (= 8.1.2)
+      actionpack (= 8.1.3)
-      activesupport (= 8.1.2)
+      activesupport (= 8.1.3)
       irb (~> 1.13)
       rackup (>= 1.0.0)
       rake (>= 12.2)
@@ -285,21 +285,21 @@ GEM
       tsort (>= 0.2)
       zeitwerk (~> 2.6)
     rainbow (3.1.1)
-    rake (13.3.1)
+    rake (13.4.2)
     rdoc (7.2.0)
       erb
       psych (>= 4.0.0)
       tsort
-    regexp_parser (2.11.3)
+    regexp_parser (2.12.0)
     reline (0.6.3)
       io-console (~> 0.5)
     rexml (3.4.4)
     rotp (6.3.0)
-    rqrcode (3.1.1)
+    rqrcode (3.2.0)
       chunky_png (~> 1.0)
       rqrcode_core (~> 2.0)
-    rqrcode_core (2.0.1)
+    rqrcode_core (2.1.0)
-    rubocop (1.81.7)
+    rubocop (1.84.2)
       json (~> 2.3)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.1.0)
@@ -307,10 +307,10 @@ GEM
       parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 2.9.3, < 3.0)
-      rubocop-ast (>= 1.47.1, < 2.0)
+      rubocop-ast (>= 1.49.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 4.0)
-    rubocop-ast (1.49.0)
+    rubocop-ast (1.49.1)
       parser (>= 3.3.7.2)
       prism (~> 1.7)
     rubocop-performance (1.26.1)
@@ -325,18 +325,19 @@ GEM
     safety_net_attestation (0.5.0)
       jwt (>= 2.0, < 4.0)
     securerandom (0.4.1)
-    selenium-webdriver (4.39.0)
+    selenium-webdriver (4.43.0)
       base64 (~> 0.2)
       logger (~> 1.4)
       rexml (~> 3.2, >= 3.2.5)
       rubyzip (>= 1.2.2, < 4.0)
       websocket (~> 1.0)
-    sentry-rails (6.2.0)
+    sentry-rails (6.5.0)
       railties (>= 5.2.0)
-      sentry-ruby (~> 6.2.0)
+      sentry-ruby (~> 6.5.0)
-    sentry-ruby (6.2.0)
+    sentry-ruby (6.5.0)
       bigdecimal
       concurrent-ruby (~> 1.0, >= 1.0.2)
+      logger
     simplecov (0.22.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
@@ -352,20 +353,20 @@ GEM
       activejob (>= 7.2)
       activerecord (>= 7.2)
       railties (>= 7.2)
-    solid_queue (1.2.4)
+    solid_queue (1.4.0)
       activejob (>= 7.1)
       activerecord (>= 7.1)
       concurrent-ruby (>= 1.3.1)
       fugit (~> 1.11)
       railties (>= 7.1)
       thor (>= 1.3.1)
-    sqlite3 (2.9.0-aarch64-linux-gnu)
+    sqlite3 (2.9.3-aarch64-linux-gnu)
-    sqlite3 (2.9.0-aarch64-linux-musl)
+    sqlite3 (2.9.3-aarch64-linux-musl)
-    sqlite3 (2.9.0-arm-linux-gnu)
+    sqlite3 (2.9.3-arm-linux-gnu)
-    sqlite3 (2.9.0-arm-linux-musl)
+    sqlite3 (2.9.3-arm-linux-musl)
-    sqlite3 (2.9.0-arm64-darwin)
+    sqlite3 (2.9.3-arm64-darwin)
-    sqlite3 (2.9.0-x86_64-linux-gnu)
+    sqlite3 (2.9.3-x86_64-linux-gnu)
-    sqlite3 (2.9.0-x86_64-linux-musl)
+    sqlite3 (2.9.3-x86_64-linux-musl)
     sshkit (1.25.0)
       base64
       logger
@@ -373,10 +374,10 @@ GEM
       net-sftp (>= 2.1.2)
       net-ssh (>= 2.8.0)
       ostruct
-    standard (1.52.0)
+    standard (1.54.0)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.0)
-      rubocop (~> 1.81.7)
+      rubocop (~> 1.84.0)
       standard-custom (~> 1.0.0)
       standard-performance (~> 1.8)
     standard-custom (1.0.2)
@@ -391,24 +392,24 @@ GEM
     tailwindcss-rails (4.4.0)
       railties (>= 7.0.0)
       tailwindcss-ruby (~> 4.0)
-    tailwindcss-ruby (4.1.18)
+    tailwindcss-ruby (4.2.4)
-    tailwindcss-ruby (4.1.18-aarch64-linux-gnu)
+    tailwindcss-ruby (4.2.4-aarch64-linux-gnu)
-    tailwindcss-ruby (4.1.18-aarch64-linux-musl)
+    tailwindcss-ruby (4.2.4-aarch64-linux-musl)
-    tailwindcss-ruby (4.1.18-arm64-darwin)
+    tailwindcss-ruby (4.2.4-arm64-darwin)
-    tailwindcss-ruby (4.1.18-x86_64-linux-gnu)
+    tailwindcss-ruby (4.2.4-x86_64-linux-gnu)
-    tailwindcss-ruby (4.1.18-x86_64-linux-musl)
+    tailwindcss-ruby (4.2.4-x86_64-linux-musl)
     thor (1.5.0)
-    thruster (0.1.17)
+    thruster (0.1.20)
-    thruster (0.1.17-aarch64-linux)
+    thruster (0.1.20-aarch64-linux)
-    thruster (0.1.17-arm64-darwin)
+    thruster (0.1.20-arm64-darwin)
-    thruster (0.1.17-x86_64-linux)
+    thruster (0.1.20-x86_64-linux)
-    timeout (0.6.0)
+    timeout (0.6.1)
     tpm-key_attestation (0.14.1)
       bindata (~> 2.4)
       openssl (> 2.0)
       openssl-signature_algorithm (~> 1.0)
     tsort (0.2.0)
-    turbo-rails (2.0.20)
+    turbo-rails (2.0.23)
       actionpack (>= 7.1.0)
       railties (>= 7.1.0)
     tzinfo (2.0.6)
@@ -418,11 +419,10 @@ GEM
     unicode-emoji (4.2.0)
     uri (1.1.1)
     useragent (0.16.11)
-    web-console (4.2.1)
+    web-console (4.3.0)
-      actionview (>= 6.0.0)
+      actionview (>= 8.0.0)
-      activemodel (>= 6.0.0)
       bindex (>= 0.4.0)
-      railties (>= 6.0.0)
+      railties (>= 8.0.0)
     webauthn (3.4.3)
       android_key_attestation (~> 0.3.0)
       bindata (~> 2.4)
@@ -469,7 +469,7 @@ DEPENDENCIES
   propshaft
   public_suffix (~> 7.0)
   puma (>= 5.0)
-  rails (~> 8.1.2)
+  rails (~> 8.1.3)
   rotp (~> 6.3)
   rqrcode (~> 3.1)
   selenium-webdriver
@@ -490,4 +490,4 @@ DEPENDENCIES
   webauthn (~> 3.0)
 
 BUNDLED WITH
-  4.0.3
+  4.0.6

app/controllers/api_keys_controller.rb

@@ -14,6 +14,7 @@ class ApiKeysController < ApplicationController
     @api_key = Current.session.user.api_keys.build(api_key_params)
 
     if @api_key.save
+      SecurityMailer.api_key_created(Current.session.user, name: @api_key.name, **security_event_context).deliver_later
       flash[:api_key_token] = @api_key.plaintext_token
       redirect_to api_key_path(@api_key)
     else
@@ -31,6 +32,7 @@ class ApiKeysController < ApplicationController
 
   def destroy
     @api_key.revoke!
+    SecurityMailer.api_key_revoked(@api_key.user, name: @api_key.name, **security_event_context).deliver_later
     redirect_to api_keys_path, notice: "API key revoked."
   end
 

app/controllers/application_controller.rb

@@ -14,6 +14,10 @@ class ApplicationController < ActionController::Base
 
   private
 
+  def security_event_context
+    {ip: request.remote_ip, user_agent: request.user_agent, occurred_at: Time.current}
+  end
+
   # Remove a query parameter from a URL using proper URI parsing
   # More robust than regex - handles URL encoding, edge cases, etc.
   #

app/controllers/concerns/authentication.rb

@@ -73,7 +73,15 @@ module Authentication
       # Set domain for cross-subdomain authentication if we can extract it
       cookie_options[:domain] = domain if domain.present?
 
+      # When "Remember me" is off, issue a browser-session cookie (no Expires)
+      # so closing the browser signs the user out — especially important on
+      # shared devices. The server Session#expires_at still enforces the
+      # 24h / 30d window regardless.
+      if remember_me
         cookies.signed.permanent[:session_id] = cookie_options
+      else
+        cookies.signed[:session_id] = cookie_options
+      end
 
       # Create a one-time token for immediate forward auth after authentication
       # This solves the race condition where browser hasn't processed cookie yet

app/controllers/passwords_controller.rb

@@ -20,6 +20,7 @@ class PasswordsController < ApplicationController
 
   def update
     if @user.update(params.permit(:password, :password_confirmation))
+      SecurityMailer.password_changed(@user, **security_event_context).deliver_later
       @user.sessions.destroy_all
       redirect_to signin_path, notice: "Password has been reset."
     else

app/controllers/profiles_controller.rb

@@ -15,6 +15,7 @@ class ProfilesController < ApplicationController
       end
 
       if @user.update(password_params)
+        SecurityMailer.password_changed(@user, **security_event_context).deliver_later
         redirect_to profile_path, notice: "Password updated successfully."
       else
         render :show, status: :unprocessable_entity
@@ -27,7 +28,15 @@ class ProfilesController < ApplicationController
         return
       end
 
+      old_email = @user.email_address
       if @user.update(email_params)
+        new_email = @user.email_address
+        if old_email != new_email
+          context = security_event_context
+          [old_email, new_email].uniq.each do |recipient|
+            SecurityMailer.email_address_changed(@user, recipient: recipient, old_email: old_email, new_email: new_email, **context).deliver_later
+          end
+        end
         redirect_to profile_path, notice: "Email updated successfully."
       else
         render :show, status: :unprocessable_entity

app/controllers/totp_controller.rb

@@ -103,6 +103,7 @@ class TotpController < ApplicationController
     # Generate new backup codes and store BCrypt hashes
     plain_codes = @user.send(:generate_backup_codes)
     @user.save!
+    SecurityMailer.backup_codes_regenerated(@user, **security_event_context).deliver_later
 
     # Store plain codes temporarily in session for display
     session[:temp_backup_codes] = plain_codes
@@ -136,6 +137,7 @@ class TotpController < ApplicationController
     end
 
     @user.disable_totp!
+    SecurityMailer.totp_disabled(@user, **security_event_context).deliver_later
     redirect_to profile_path, notice: "Two-factor authentication has been disabled."
   end
 

app/controllers/webauthn_controller.rb

@@ -91,6 +91,8 @@ class WebauthnController < ApplicationController
         backup_state: backup_state
       )
 
+      SecurityMailer.passkey_added(user, nickname: @webauthn_credential.nickname, **security_event_context).deliver_later
+
       render json: {
         success: true,
         message: "Passkey '#{nickname}' registered successfully",
@@ -109,8 +111,11 @@ class WebauthnController < ApplicationController
   # Remove a passkey
   def destroy
     nickname = @webauthn_credential.nickname
+    user = @webauthn_credential.user
     @webauthn_credential.destroy
 
+    SecurityMailer.passkey_removed(user, nickname: nickname, **security_event_context).deliver_later
+
     respond_to do |format|
       format.html {
         redirect_to profile_path,

app/helpers/application_helper.rb

@@ -20,6 +20,21 @@ module ApplicationHelper
     end
   end
 
+  def oidc_env_lines(application, client_secret: nil)
+    lines = ["OIDC_CLIENT_ID=#{application.client_id}"]
+    lines << if client_secret
+      "OIDC_CLIENT_SECRET=#{client_secret}"
+    elsif application.public_client?
+      "OIDC_CLIENT_SECRET="
+    else
+      "OIDC_CLIENT_SECRET=<your-client-secret>"
+    end
+    lines << "OIDC_DISCOVERY_URL=#{OidcJwtService.issuer_url}"
+    lines << "OIDC_PROVIDER_NAME='Clinch'"
+    lines << "OIDC_REQUIRE_PKCE=#{application.requires_pkce? ? 'true' : 'false'}"
+    lines
+  end
+
   def border_class_for(type)
     case type.to_s
     when "notice" then "border-green-200 dark:border-green-700"

app/mailers/security_mailer.rb

@@ -0,0 +1,59 @@
+class SecurityMailer < ApplicationMailer
+  SUBJECT_PREFIX = "[Clinch security alert] ".freeze
+
+  def password_changed(user, ip:, user_agent:, occurred_at:)
+    assign_context(user, ip, user_agent, occurred_at)
+    mail subject: "#{SUBJECT_PREFIX}Your password was changed", to: user.email_address
+  end
+
+  def totp_disabled(user, ip:, user_agent:, occurred_at:)
+    assign_context(user, ip, user_agent, occurred_at)
+    mail subject: "#{SUBJECT_PREFIX}Two-factor authentication was disabled", to: user.email_address
+  end
+
+  def backup_codes_regenerated(user, ip:, user_agent:, occurred_at:)
+    assign_context(user, ip, user_agent, occurred_at)
+    mail subject: "#{SUBJECT_PREFIX}Two-factor backup codes were regenerated", to: user.email_address
+  end
+
+  def passkey_added(user, nickname:, ip:, user_agent:, occurred_at:)
+    assign_context(user, ip, user_agent, occurred_at)
+    @nickname = nickname
+    mail subject: "#{SUBJECT_PREFIX}A passkey was added to your account", to: user.email_address
+  end
+
+  def passkey_removed(user, nickname:, ip:, user_agent:, occurred_at:)
+    assign_context(user, ip, user_agent, occurred_at)
+    @nickname = nickname
+    mail subject: "#{SUBJECT_PREFIX}A passkey was removed from your account", to: user.email_address
+  end
+
+  def api_key_created(user, name:, ip:, user_agent:, occurred_at:)
+    assign_context(user, ip, user_agent, occurred_at)
+    @api_key_name = name
+    mail subject: "#{SUBJECT_PREFIX}An API key was created on your account", to: user.email_address
+  end
+
+  def api_key_revoked(user, name:, ip:, user_agent:, occurred_at:)
+    assign_context(user, ip, user_agent, occurred_at)
+    @api_key_name = name
+    mail subject: "#{SUBJECT_PREFIX}An API key was revoked on your account", to: user.email_address
+  end
+
+  def email_address_changed(user, recipient:, old_email:, new_email:, ip:, user_agent:, occurred_at:)
+    assign_context(user, ip, user_agent, occurred_at)
+    @recipient = recipient
+    @old_email = old_email
+    @new_email = new_email
+    mail subject: "#{SUBJECT_PREFIX}Your account email address was changed", to: recipient
+  end
+
+  private
+
+  def assign_context(user, ip, user_agent, occurred_at)
+    @user = user
+    @ip = ip
+    @user_agent = user_agent
+    @occurred_at = occurred_at
+  end
+end

app/models/svg_scrubber.rb

@@ -0,0 +1,73 @@
+# Loofah scrubber that strips dangerous content from SVG files
+# while preserving safe SVG elements and attributes for icon display.
+class SvgScrubber < Loofah::Scrubber
+  ALLOWED_ELEMENTS = %w[
+    svg g defs use symbol
+    circle ellipse line path polygon polyline rect
+    text tspan textPath
+    clipPath mask pattern
+    linearGradient radialGradient stop
+    filter feBlend feColorMatrix feComponentTransfer feComposite
+    feConvolveMatrix feDiffuseLighting feDisplacementMap feFlood
+    feGaussianBlur feImage feMerge feMergeNode feMorphology
+    feOffset feSpecularLighting feTile feTurbulence
+    title desc metadata
+  ].freeze
+
+  ALLOWED_ATTRIBUTES = %w[
+    id class style
+    x y x1 y1 x2 y2 cx cy r rx ry
+    width height viewBox preserveAspectRatio
+    d points
+    fill stroke stroke-width stroke-linecap stroke-linejoin stroke-dasharray
+    opacity fill-opacity stroke-opacity
+    transform translate rotate scale
+    font-family font-size font-weight text-anchor
+    clip-path mask filter
+    gradientUnits gradientTransform spreadMethod
+    offset stop-color stop-opacity
+    dx dy textLength lengthAdjust
+    xmlns xmlns:xlink
+    color display visibility overflow
+    fill-rule clip-rule
+    marker-start marker-mid marker-end
+  ].freeze
+
+  # Loofah hands attribute names back in their source case (e.g. "viewBox").
+  # Compare against a downcased copy so SVG-spec camelCase attributes aren't
+  # stripped from legitimate icons.
+  ALLOWED_ATTRIBUTES_LOOKUP = ALLOWED_ATTRIBUTES.map(&:downcase).to_set.freeze
+
+  # Event handler attributes that must always be removed
+  EVENT_HANDLER_PATTERN = /\Aon/i
+
+  def initialize
+    @direction = :top_down
+  end
+
+  def scrub(node)
+    return CONTINUE if node.text? || node.cdata?
+
+    if node.element?
+      if ALLOWED_ELEMENTS.include?(node.name)
+        # Remove disallowed and event handler attributes
+        node.attribute_nodes.each do |attr|
+          attr.remove unless safe_attribute?(attr)
+        end
+        return CONTINUE
+      end
+    end
+
+    node.remove
+    STOP
+  end
+
+  private
+
+  def safe_attribute?(attr)
+    name = attr.name.downcase
+    return false if name.match?(EVENT_HANDLER_PATTERN)
+    return false if attr.value&.match?(/javascript:|data:/i)
+    ALLOWED_ATTRIBUTES_LOOKUP.include?(name)
+  end
+end

app/views/admin/applications/show.html.erb

@@ -25,6 +25,23 @@
             Public clients do not have a client secret. PKCE is required.
           </div>
         <% end %>
+
+        <% env_lines = oidc_env_lines(@application, client_secret: flash[:client_secret]) %>
+
+        <div class="mt-4" data-controller="clipboard">
+          <div class="flex items-center justify-between mb-2">
+            <span class="text-xs font-medium text-yellow-700 dark:text-yellow-300">Environment variables (copy &amp; paste):</span>
+            <button type="button"
+                    data-action="clipboard#copy"
+                    class="text-xs font-medium text-yellow-700 dark:text-yellow-300 hover:text-yellow-900 dark:hover:text-yellow-100 underline">
+              <span data-clipboard-target="label">Copy</span>
+            </button>
+          </div>
+          <textarea data-clipboard-target="source"
+                    readonly
+                    rows="<%= env_lines.length %>"
+                    class="block w-full bg-yellow-100 dark:bg-yellow-900/50 px-3 py-2 rounded font-mono text-xs text-gray-900 dark:text-gray-100 resize-none focus:outline-none focus:ring-1 focus:ring-yellow-500"><%= env_lines.join("\n") %></textarea>
+        </div>
       </div>
     </div>
   <% end %>
@@ -157,6 +174,30 @@
                 </dd>
               </div>
             <% end %>
+            <div>
+              <details class="border border-gray-200 dark:border-gray-700 rounded-lg">
+                <summary class="cursor-pointer bg-gray-50 dark:bg-gray-700 px-4 py-3 hover:bg-gray-100 dark:hover:bg-gray-600 rounded-lg text-sm font-medium text-gray-700 dark:text-gray-300">
+                  Environment variables
+                </summary>
+                <div class="px-4 py-3" data-controller="clipboard">
+                  <% env_lines = oidc_env_lines(@application) %>
+                  <div class="flex items-center justify-between mb-2">
+                    <span class="text-xs text-gray-500 dark:text-gray-400">
+                      <%= @application.confidential_client? ? "Replace <your-client-secret> with your saved secret." : "Public client — no secret required." %>
+                    </span>
+                    <button type="button"
+                            data-action="clipboard#copy"
+                            class="text-xs font-medium text-gray-600 dark:text-gray-400 hover:text-gray-900 dark:hover:text-gray-100 underline">
+                      <span data-clipboard-target="label">Copy</span>
+                    </button>
+                  </div>
+                  <textarea data-clipboard-target="source"
+                            readonly
+                            rows="<%= env_lines.length %>"
+                            class="block w-full bg-gray-100 dark:bg-gray-700 px-3 py-2 rounded font-mono text-xs text-gray-900 dark:text-gray-100 resize-none focus:outline-none focus:ring-1 focus:ring-gray-500"><%= env_lines.join("\n") %></textarea>
+                </div>
+              </details>
+            </div>
           <% end %>
           <div>
             <dt class="text-sm font-medium text-gray-500 dark:text-gray-400">Redirect URIs</dt>

app/views/passwords_mailer/reset.html.erb

@@ -1,6 +1,6 @@
 <p>
   You can reset your password on
-  <%= link_to "this password reset page", edit_password_url(@user.password_reset_token) %>.
+  <%= link_to "this password reset page", edit_password_url(@user.generate_token_for(:password_reset)) %>.
 
-  This link will expire in <%= distance_of_time_in_words(0, @user.password_reset_token_expires_in) %>.
+  This link will expire in 1 hour.
 </p>

app/views/passwords_mailer/reset.text.erb

@@ -1,4 +1,4 @@
 You can reset your password on
-<%= edit_password_url(@user.password_reset_token) %>
+<%= edit_password_url(@user.generate_token_for(:password_reset)) %>
 
-This link will expire in <%= distance_of_time_in_words(0, @user.password_reset_token_expires_in) %>.
+This link will expire in 1 hour.

app/views/security_mailer/_event_metadata.html.erb

@@ -0,0 +1,11 @@
+<hr>
+<p>
+  This action was recorded at <strong><%= @occurred_at.to_fs(:long) %></strong>
+  from IP <strong><%= @ip %></strong>
+  using <strong><%= @user_agent.presence || "an unknown client" %></strong>.
+</p>
+
+<p>
+  If you did <strong>not</strong> perform this action, reset your password
+  immediately and contact your administrator.
+</p>

app/views/security_mailer/_event_metadata.text.erb

@@ -0,0 +1,7 @@
+---
+This action was recorded at <%= @occurred_at.to_fs(:long) %>
+from IP <%= @ip %>
+using <%= @user_agent.presence || "an unknown client" %>.
+
+If you did not perform this action, reset your password immediately
+and contact your administrator.

app/views/security_mailer/api_key_created.html.erb

@@ -0,0 +1,8 @@
+<p>Hello,</p>
+
+<p>
+  A new API key (<strong><%= @api_key_name %></strong>) was just created
+  on your Clinch account (<strong><%= @user.email_address %></strong>).
+</p>
+
+<%= render "event_metadata" %>

app/views/security_mailer/api_key_created.text.erb

@@ -0,0 +1,6 @@
+Hello,
+
+A new API key ("<%= @api_key_name %>") was just created on your Clinch
+account (<%= @user.email_address %>).
+
+<%= render "event_metadata" %>

app/views/security_mailer/api_key_revoked.html.erb

@@ -0,0 +1,8 @@
+<p>Hello,</p>
+
+<p>
+  The API key <strong><%= @api_key_name %></strong> was just revoked
+  on your Clinch account (<strong><%= @user.email_address %></strong>).
+</p>
+
+<%= render "event_metadata" %>

app/views/security_mailer/api_key_revoked.text.erb

@@ -0,0 +1,6 @@
+Hello,
+
+The API key "<%= @api_key_name %>" was just revoked on your Clinch
+account (<%= @user.email_address %>).
+
+<%= render "event_metadata" %>

app/views/security_mailer/backup_codes_regenerated.html.erb

@@ -0,0 +1,9 @@
+<p>Hello,</p>
+
+<p>
+  A new set of two-factor backup codes was generated on your Clinch
+  account (<strong><%= @user.email_address %></strong>).
+  Any previous backup codes are now invalid.
+</p>
+
+<%= render "event_metadata" %>

app/views/security_mailer/backup_codes_regenerated.text.erb

@@ -0,0 +1,6 @@
+Hello,
+
+A new set of two-factor backup codes was generated on your Clinch account
+(<%= @user.email_address %>). Any previous backup codes are now invalid.
+
+<%= render "event_metadata" %>

app/views/security_mailer/email_address_changed.html.erb

@@ -0,0 +1,22 @@
+<p>Hello,</p>
+
+<% if @recipient == @new_email %>
+  <p>
+    The email address on your Clinch account is now
+    <strong><%= @new_email %></strong>.
+    It was previously <strong><%= @old_email %></strong>.
+  </p>
+<% else %>
+  <p>
+    The email address on your Clinch account was changed away from this
+    address (<strong><%= @old_email %></strong>) to
+    <strong><%= @new_email %></strong>.
+  </p>
+  <p>
+    If this was <strong>not</strong> you, contact your administrator
+    immediately — whoever made the change can now receive password
+    reset emails for the account.
+  </p>
+<% end %>
+
+<%= render "event_metadata" %>

app/views/security_mailer/email_address_changed.text.erb

@@ -0,0 +1,14 @@
+Hello,
+
+<% if @recipient == @new_email %>
+The email address on your Clinch account is now <%= @new_email %>.
+It was previously <%= @old_email %>.
+<% else %>
+The email address on your Clinch account was changed away from this
+address (<%= @old_email %>) to <%= @new_email %>.
+
+If this was not you, contact your administrator immediately — whoever
+made the change can now receive password reset emails for the account.
+<% end %>
+
+<%= render "event_metadata" %>

app/views/security_mailer/passkey_added.html.erb

@@ -0,0 +1,8 @@
+<p>Hello,</p>
+
+<p>
+  A new passkey (<strong><%= @nickname %></strong>) was just added to your
+  Clinch account (<strong><%= @user.email_address %></strong>).
+</p>
+
+<%= render "event_metadata" %>

app/views/security_mailer/passkey_added.text.erb

@@ -0,0 +1,6 @@
+Hello,
+
+A new passkey ("<%= @nickname %>") was just added to your Clinch account
+(<%= @user.email_address %>).
+
+<%= render "event_metadata" %>

app/views/security_mailer/passkey_removed.html.erb

@@ -0,0 +1,8 @@
+<p>Hello,</p>
+
+<p>
+  A passkey (<strong><%= @nickname %></strong>) was just removed from your
+  Clinch account (<strong><%= @user.email_address %></strong>).
+</p>
+
+<%= render "event_metadata" %>

app/views/security_mailer/passkey_removed.text.erb

@@ -0,0 +1,6 @@
+Hello,
+
+A passkey ("<%= @nickname %>") was just removed from your Clinch account
+(<%= @user.email_address %>).
+
+<%= render "event_metadata" %>

app/views/security_mailer/password_changed.html.erb

@@ -0,0 +1,8 @@
+<p>Hello,</p>
+
+<p>
+  The password on your Clinch account
+  (<strong><%= @user.email_address %></strong>) was just changed.
+</p>
+
+<%= render "event_metadata" %>

app/views/security_mailer/password_changed.text.erb

@@ -0,0 +1,5 @@
+Hello,
+
+The password on your Clinch account (<%= @user.email_address %>) was just changed.
+
+<%= render "event_metadata" %>

app/views/security_mailer/totp_disabled.html.erb

@@ -0,0 +1,8 @@
+<p>Hello,</p>
+
+<p>
+  Two-factor authentication was just <strong>disabled</strong> on your
+  Clinch account (<strong><%= @user.email_address %></strong>).
+</p>
+
+<%= render "event_metadata" %>

app/views/security_mailer/totp_disabled.text.erb

@@ -0,0 +1,6 @@
+Hello,
+
+Two-factor authentication was just disabled on your Clinch account
+(<%= @user.email_address %>).
+
+<%= render "event_metadata" %>

config/deploy.yml

@@ -38,10 +38,6 @@ env:
   secret:
     - RAILS_MASTER_KEY
   clear:
-    # Run the Solid Queue Supervisor inside the web server's Puma process to do jobs.
-    # When you start using multiple servers, you should split out job processing to a dedicated machine.
-    SOLID_QUEUE_IN_PUMA: true
-
     # Set number of processes dedicated to Solid Queue (default: 1)
     # JOB_CONCURRENCY: 3
 

config/initializers/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Clinch
-  VERSION = "0.9.0"
+  VERSION = "0.10.1"
 end

config/puma.rb

@@ -34,7 +34,9 @@ port ENV.fetch("PORT", 3000)
 # Allow puma to be restarted by `bin/rails restart` command.
 plugin :tmp_restart
 
-# Solid Queue plugin removed - now using async processor
+# Run the Solid Queue supervisor inside Puma. Clinch ships as a single
+# container, so the web process is always the worker too.
+plugin :solid_queue if ENV.fetch("RAILS_ENV", "development") == "production"
 
 # Specify the PID file. Defaults to tmp/pids/server.pid in development.
 # In other environments, only set the PID file if requested.

test/controllers/sessions_controller_test.rb

@@ -30,4 +30,22 @@ class SessionsControllerTest < ActionDispatch::IntegrationTest
     assert_redirected_to signin_path
     assert_empty cookies[:session_id]
   end
+
+  test "session cookie has no Expires attribute when remember_me is off" do
+    post session_path, params: {email_address: @user.email_address, password: "password", remember_me: "0"}
+
+    set_cookie = Array(response.headers["Set-Cookie"]).find { |c| c.start_with?("session_id=") }
+    assert set_cookie, "session_id cookie should be set"
+    refute_match(/expires=/i, set_cookie,
+      "without Remember me, the session cookie must be a browser-session cookie (no Expires)")
+  end
+
+  test "session cookie has long-lived Expires attribute when remember_me is on" do
+    post session_path, params: {email_address: @user.email_address, password: "password", remember_me: "1"}
+
+    set_cookie = Array(response.headers["Set-Cookie"]).find { |c| c.start_with?("session_id=") }
+    assert set_cookie, "session_id cookie should be set"
+    assert_match(/expires=/i, set_cookie,
+      "with Remember me, the cookie should have an Expires attribute")
+  end
 end

test/mailers/security_mailer_test.rb

@@ -0,0 +1,111 @@
+require "test_helper"
+
+class SecurityMailerTest < ActionMailer::TestCase
+  CONTEXT = {
+    ip: "203.0.113.42",
+    user_agent: "Mozilla/5.0 (TestBrowser)",
+    occurred_at: Time.utc(2026, 5, 2, 13, 37)
+  }.freeze
+
+  def setup
+    @user = User.create!(email_address: "security_mailer_test@example.com", password: "password123")
+  end
+
+  def teardown
+    @user.destroy
+  end
+
+  test "password_changed names the user and includes request metadata" do
+    email = SecurityMailer.password_changed(@user, **CONTEXT)
+
+    assert_equal [@user.email_address], email.to
+    assert_match(/password was changed/i, email.subject)
+    assert_bodies_contain email, @user.email_address
+    assert_bodies_contain email, "203.0.113.42"
+    assert_bodies_contain email, "TestBrowser"
+  end
+
+  test "totp_disabled describes the change" do
+    email = SecurityMailer.totp_disabled(@user, **CONTEXT)
+
+    assert_equal [@user.email_address], email.to
+    assert_match(/two-factor.*disabled/i, email.subject)
+    assert_bodies_contain email, "203.0.113.42"
+  end
+
+  test "backup_codes_regenerated mentions previous codes are invalid" do
+    email = SecurityMailer.backup_codes_regenerated(@user, **CONTEXT)
+
+    assert_match(/backup codes/i, email.subject)
+    assert_bodies_match email, /previous backup codes are now invalid/i
+  end
+
+  test "passkey_added includes the nickname" do
+    email = SecurityMailer.passkey_added(@user, nickname: "Yubikey-5", **CONTEXT)
+
+    assert_match(/passkey.*added/i, email.subject)
+    assert_bodies_contain email, "Yubikey-5"
+  end
+
+  test "passkey_removed includes the nickname" do
+    email = SecurityMailer.passkey_removed(@user, nickname: "Old MacBook", **CONTEXT)
+
+    assert_match(/passkey.*removed/i, email.subject)
+    assert_bodies_contain email, "Old MacBook"
+  end
+
+  test "api_key_created includes the key name" do
+    email = SecurityMailer.api_key_created(@user, name: "CI bot", **CONTEXT)
+
+    assert_match(/api key.*created/i, email.subject)
+    assert_bodies_contain email, "CI bot"
+  end
+
+  test "api_key_revoked includes the key name" do
+    email = SecurityMailer.api_key_revoked(@user, name: "Old token", **CONTEXT)
+
+    assert_match(/api key.*revoked/i, email.subject)
+    assert_bodies_contain email, "Old token"
+  end
+
+  test "email_address_changed sent to new address confirms the new value" do
+    email = SecurityMailer.email_address_changed(@user,
+      recipient: "new@example.com",
+      old_email: "old@example.com",
+      new_email: "new@example.com",
+      **CONTEXT)
+
+    assert_equal ["new@example.com"], email.to
+    assert_bodies_contain email, "new@example.com"
+    assert_bodies_contain email, "old@example.com"
+    assert_bodies_no_match email, /reset emails for the account/
+  end
+
+  test "email_address_changed sent to old address warns about reset emails" do
+    email = SecurityMailer.email_address_changed(@user,
+      recipient: "old@example.com",
+      old_email: "old@example.com",
+      new_email: "new@example.com",
+      **CONTEXT)
+
+    assert_equal ["old@example.com"], email.to
+    assert_bodies_match email, /reset emails for the account/
+  end
+
+  private
+
+  def assert_bodies_contain(email, fragment)
+    assert_match fragment, email.text_part.body.to_s, "expected text body to contain #{fragment.inspect}"
+    assert_match fragment, email.html_part.body.to_s, "expected html body to contain #{fragment.inspect}"
+  end
+
+  def assert_bodies_match(email, regex)
+    assert_match regex, email.text_part.body.to_s
+    assert_match regex, email.html_part.body.to_s
+  end
+
+  def assert_bodies_no_match(email, regex)
+    refute_match regex, email.text_part.body.to_s
+    refute_match regex, email.html_part.body.to_s
+  end
+end

test/models/svg_scrubber_test.rb

@@ -0,0 +1,49 @@
+require "test_helper"
+
+class SvgScrubberTest < ActiveSupport::TestCase
+  def scrub(svg)
+    Loofah.xml_document(svg).scrub!(SvgScrubber.new).to_xml
+  end
+
+  test "strips embedded script elements" do
+    svg = %(<svg xmlns="http://www.w3.org/2000/svg"><script>alert(1)</script><path d="M0 0"/></svg>)
+
+    cleaned = scrub(svg)
+
+    refute_match(/<script/i, cleaned)
+    refute_match(/alert/i, cleaned)
+    assert_match(/<path/, cleaned)
+  end
+
+  test "strips on* event handler attributes while preserving the element" do
+    svg = %(<svg xmlns="http://www.w3.org/2000/svg" onload="alert(1)"><circle cx="5" cy="5" r="3" onclick="steal()"/></svg>)
+
+    cleaned = scrub(svg)
+
+    refute_match(/onload/i, cleaned)
+    refute_match(/onclick/i, cleaned)
+    refute_match(/alert|steal/, cleaned)
+    assert_match(/<svg/, cleaned)
+    assert_match(/<circle/, cleaned)
+  end
+
+  test "strips attribute values that point at javascript: or data: URIs" do
+    svg = %(<svg xmlns="http://www.w3.org/2000/svg"><a href="javascript:alert(1)"><path d="M0 0" fill="data:text/html,evil"/></a></svg>)
+
+    cleaned = scrub(svg)
+
+    refute_match(/javascript:/i, cleaned)
+    refute_match(/data:text\/html/i, cleaned)
+  end
+
+  test "preserves a benign icon unchanged in shape" do
+    svg = %(<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 2 L22 22 L2 22 Z" fill="#000"/></svg>)
+
+    cleaned = scrub(svg)
+
+    assert_match(/<svg/, cleaned)
+    assert_match(/<path/, cleaned)
+    assert_match(/M12 2 L22 22 L2 22 Z/, cleaned)
+    assert_match(/viewBox="0 0 24 24"/, cleaned)
+  end
+end