Add multi-database test runner (test:all_databases)

Adds `bundle exec rails test:all_databases` which runs the full test
suite against every test database configured in database.yml in a single
command.

Convention: any top-level key starting with "test" that contains a Hash
is a test database. `test:` is the required primary; `test_<name>:` blocks
are optional additional adapters (e.g. test_sqlite, test_pg).

For each configured database the task:
  1. Checks the required adapter gem is available (skips with warning if not)
  2. Runs `rails db:test:prepare` to create and migrate the database
  3. Runs `rails test` and records pass/fail
  4. Prints a summary and exits non-zero if any database failed

Mechanism: a RAILS_DATABASE_YML env var points each subprocess to a
temporary database.yml that contains only the current test config.
config/application.rb(.dist) reads this var and overrides Rails'
database config path before initialisation, so no monkey-patching of
the test runner is required.

config/database.yml.dist is updated with documented examples for SQLite
and PostgreSQL additional test databases.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/test.yml

@@ -1,74 +0,0 @@
-name: Tests
-
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-
-jobs:
-  test-sqlite:
-    name: Tests (SQLite)
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: '3.3'
-          bundler-cache: true
-        env:
-          BUNDLE_WITH: "sqlite:development:test"
-
-      - name: Set up test database
-        run: bin/rails db:create db:schema:load
-        env:
-          RAILS_ENV: test
-
-      - name: Run tests
-        run: bin/rails test
-        env:
-          RAILS_ENV: test
-          CI: "true"
-
-  test-mysql:
-    name: Tests (MySQL)
-    runs-on: ubuntu-latest
-
-    services:
-      mysql:
-        image: mysql:8.0
-        env:
-          MYSQL_ROOT_PASSWORD: ""
-          MYSQL_ALLOW_EMPTY_PASSWORD: "yes"
-          MYSQL_DATABASE: fixin_test
-        ports:
-          - 3306:3306
-        options: >-
-          --health-cmd="mysqladmin ping"
-          --health-interval=10s
-          --health-timeout=5s
-          --health-retries=3
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: '3.3'
-          bundler-cache: true
-        env:
-          BUNDLE_WITH: "mysql:development:test"
-
-      - name: Set up test database
-        run: bin/rails db:schema:load
-        env:
-          RAILS_ENV: test
-          DB_ADAPTER: mysql
-
-      - name: Run tests
-        run: bin/rails test
-        env:
-          RAILS_ENV: test
-          CI: "true"
-          DB_ADAPTER: mysql

DESIGN.md

@@ -0,0 +1,34 @@
+DESIGN
+======
+
+Below is a list of design decisions. The justification is to be consulted
+whenever a change is considered, to avoid regressions.
+
+### Data type for DB storage of numeric values (`decimal` vs `float`)
+
+* among database engines supported (by Rails), SQLite offers storage of
+  `decimal` data type with the lowest precision, equal to the precision of
+  `REAL` type (double precision float value, IEEE 754), but in a floating point
+  format,
+    * decimal types in other database engines offer greater precision, but store
+      data in a fixed point format,
+* biology-related values differ by several orders of magnitude; storing them in
+  fixed point format would only make sense if required precision would be
+  greater than that offered by floating point format,
+    * even then, fixed point would mean either bigger memory requirements or
+      worse precision for numbers close to scale limit,
+        * for a fixed point format to use the same 8 bytes of storage as IEEE
+          754, precision would need to be limited to 18 digits (4 bytes/9 digits)
+          and scale approximately half of that - 9,
+    * double precision floating point guarantees 15 digits of precision, which
+      is more than enough for all expected use cases,
+        * single precision floating point only guarntees 6 digits of precision,
+          which is estimated to be too low for some use cases (e.g. storing
+          latitude/longitude with a resolution grater than 100m)
+* double precision floating point (IEEE 754) is a standard that ensures
+  compatibility with all database engines,
+    * the same data format is used internally by Ruby as a `Float`; it
+      guarantees no conversions between storage and computation,
+    * as a standard with hardware implementations ensures both: computing
+      efficiency and hardware/3rd party library compatibility as opposed to Ruby
+      custom `BigDecimal` type

app/assets/stylesheets/application.css

@@ -18,14 +18,12 @@
 /* Strive for simplicity:
  * * style elements/tags only - if possible,
  * * replace element/tag name with class name - if element has to be styled
- * differently depending on context (e.g. <form>; <a> as link/button),
+ * differently depending on context (e.g. <form>, <table>, <a> as link/button),
  * * styles with multiple selectors should have all selectors with same
  * specificity, to allow proper rule specificity vs order management.
  *
  * NOTE: style in a modular way, similar to how CSS @scope would be used,
  * to make transition easier once @scope is widely available. */
-/* TODO: review styles with multiple selectors and try to convert them to the same
- * specificity. */
 :root {
   --color-focus-gray: #f3f3f3;
   --color-border-gray: #dddddd;
@@ -57,8 +55,19 @@
 :focus-visible {
   outline: none;
 }
-
+/* NOTE: move to higher priority layer instead of using !important?; add CSS
-/* [hidden] submit elements cannot have `display` set as it makes them visible. */
+ * @layer requirements in README */
+[disabled] {
+  border-color: var(--color-border-gray) !important;
+  color: var(--color-border-gray) !important;
+  /* NOTE: cannot set cursor when `pointer-events: none`; can be fixed by setting
+   * `cursor` on wrapping element.
+  cursor: not-allowed; */
+  fill: var(--color-border-gray) !important;
+  pointer-events: none !important;
+}
+/* Styles set `display` without distinguishing between [hidden] elements, making
+ * them visible. */
 [hidden] {
   display: none !important;
 }
@@ -69,10 +78,13 @@
  *  gray - target for interaction with keyboard,
  *  red - destructive, non-undoable action.
  */
+/* TODO: merge selectors using :is() */
+a,
 button,
 details,
 input,
 select,
+summary,
 textarea {
   background-color: inherit;
   font: inherit;
@@ -90,14 +102,14 @@ textarea {
   border-radius: 0.25em;
   padding: 0.2em 0.4em;
 }
-[name=cancel],
+svg {
-.auxiliary {
+  height: 1.4em;
-  border-color: var(--color-border-gray);
+  margin: 0 0.2em 0 0;
-  color: var(--color-nav-gray);
+  width: 1.4em;
-  fill: var(--color-nav-gray);
+}
+svg:last-child {
+  margin-right: 0;
 }
-input[type=checkbox],
-svg,
 textarea {
   margin: 0;
 }
@@ -115,11 +127,12 @@ input[type=checkbox]:checked {
   appearance: checkbox;
   -webkit-appearance: checkbox;
 }
-/* Hide spin buttons in input number fields */
+/* Hide spin buttons of <input type=number>. */
-/* TODO: add spin buttons inside input[number]: before (-) and after (+) input */
+/* TODO: add spin buttons inside <input type=number>: before (-) and after (+) input. */
 input[type=number] {
   appearance: textfield;
   -moz-appearance: textfield;
+  text-align: end;
 }
 input::-webkit-inner-spin-button {
   -webkit-appearance: none;
@@ -128,6 +141,30 @@ input::-webkit-outer-spin-button {
   -webkit-appearance: none;
   margin: 0;
 }
+/* Text color of table form controls:
+ *  - black for row/table forms,
+ *  - inherited for internal (column specific) buttons/forms. */
+table input,
+table select,
+table summary,
+table textarea {
+  border-color: var(--color-border-gray);
+}
+table input,
+table select,
+table textarea {
+  padding-block: 0.375em;
+}
+table form input,
+table form select,
+table form summary,
+table form textarea {
+  color: inherit;
+}
+table svg:not(:only-child) {
+  height: 1.25em;
+  width: 1.25em;
+}
 input:focus-visible,
 select:focus-visible,
 select:focus-within,
@@ -136,6 +173,7 @@ summary:focus-visible,
 textarea:focus-visible {
   accent-color: var(--color-dark-blue);
   background-color: var(--color-focus-gray);
+  color: black;
 }
 input:hover,
 select:hover,
@@ -146,8 +184,15 @@ textarea:hover {
 }
 select:hover,
 summary:hover {
+  color: black;
   cursor: pointer;
 }
+/* TODO: style <details>/<summary> focus to match <select> as much as possible.
+summary:focus-visible::before,
+summary:hover::before {
+  background-color: black;
+}
+ */
 input:invalid,
 select:invalid,
 textarea:invalid {
@@ -181,21 +226,17 @@ textarea:invalid {
   padding: 0.6em 0.5em;
   width: fit-content;
 }
+.link {
+  color: inherit;
+  text-decoration: underline 1px var(--color-border-gray);
+  text-underline-offset: 0.25em;
+}
 [name=cancel],
 .auxiliary {
   border-color: var(--color-border-gray);
   color: var(--color-nav-gray);
   fill: var(--color-nav-gray);
 }
-.button > svg,
-.tab > svg {
-  height: 1.4em;
-  width: 1.4em;
-}
-.button > svg:not(:last-child),
-.tab > svg:not(:last-child) {
-  margin-right: 0.2em;
-}
 .button:focus-visible,
 .tab:focus-visible,
 .tab:hover {
@@ -211,13 +252,19 @@ textarea:invalid {
   background-color: var(--color-red);
   border-color: var(--color-red);
 }
-/* TODO: move normal, non-button links (<a>:hover/:focus) styling here (i.e.
+.link:focus-visible {
- * page-wide, top-level) and remove from `table.items` - as the style should be
+  text-decoration-color: var(--color-gray);
- * same everywhere. */
+}
-input[type=text]:read-only,
+.link:hover {
-textarea:read-only {
+  color: var(--color-blue);
-  border: none;
+  text-decoration-color: var(--color-blue);
-  padding-inline: 0;
+}
+table .button {
+  border-color: var(--color-border-gray);
+  color: var(--color-table-gray);
+  font-weight: normal;
+  height: 100%;
+  padding: 0.4em;
 }
 
 
@@ -230,16 +277,16 @@ body {
   grid-template-areas:
     "header    header  header"
     "nav       nav     nav"
-    "leftside  topside rightside"
     "leftside  main    rightside";
   grid-template-columns: 1fr minmax(max-content, 2fr) 1fr;
   font-family: system-ui;
   margin: 0.4em;
 }
-body:not(:has(.topside-area)) {
+body:has(> .topside-area) {
   grid-template-areas:
     "header    header  header"
     "nav       nav     nav"
+    "leftside  topside rightside"
     "leftside  main    rightside";
 }
 
@@ -346,7 +393,6 @@ header {
 }
 
 
-/* TODO: Hover over invalid should work like in measurements (thin vs thick border) */
 .labeled-form {
   align-items: center;
   display: grid;
@@ -383,85 +429,79 @@ header {
 .labeled-form .auxiliary {
   grid-column: 3;
   /* If more buttons are needed, `grid-row` can be replaced with
-   * `reading-flow: grid-columns` to ensure proper tabindex order */
+   * `reading-flow: grid-columns` to ensure proper [tabindex] order. */
   grid-row: 1;
   height: 100%;
   padding-block: 0;
 }
 
+.tabular-form table {
+  border: none;
+  border-spacing: 0.4em 0;
+  margin-inline: -0.4em;
+}
+.tabular-form table td {
+  border: none;
+  vertical-align: middle;
+}
+.tabular-form table td {
+  padding-inline: 0;
+}
+.tabular-form table :is(form, input, select, textarea):only-child {
+  margin-inline-start: 0;
+}
 
-/* TODO: remove `.items` class (?) and make `form table` work properly. */
+
-table.items {
+.items-table {
   border-spacing: 0;
   border: 1px solid var(--color-border-gray);
   border-radius: 0.25em;
   font-size: 0.85rem;
   text-align: left;
 }
-table:not(:has(tr)) {
+.items-table thead {
-  display: none;
-}
-table.items thead {
   font-size: 0.8rem;
 }
-table.items thead,
+.items-table thead,
-table.items tbody tr:hover {
+.items-table tbody tr:hover {
   background-color: var(--color-focus-gray);
 }
-table.items th {
+.items-table th {
-  padding-block: 0.75em;
+  padding: 0.75em 0 0.75em 1em;
   text-align: center;
 }
-table.items th,
+.items-table th:last-child {
-table.items td {
-  padding-inline: 1em 0;
-}
-/* For <a> to fill <td> completely, we use an `::after` pseudoelement. */
-table.items td.link {
-  padding: 0;
-  position: relative;
-}
-table.items td.link a {
-  color: inherit;
-  font: inherit;
-}
-table.items td.link a::after {
-  content: '';
-  inset: 0;
-  position: absolute;
-}
-table.items td:first-child {
-  padding-inline-start: calc(1em + var(--depth) * 0.8em);
-}
-table.items td:has(input, select, textarea) {
-  padding-inline-start: calc(0.6em - 0.9px);
-}
-table.items td:first-child:has(input, select, textarea) {
-  padding-inline-start: calc(0.6em + var(--depth) * 0.8em - 0.9px);
-}
-table.items th:last-child {
   padding-inline-end: 0.4em;
 }
-table.items td:last-child {
+.items-table td {
-  padding-inline-end: 0.1em;
-}
-table.items td {
   border-top: 1px solid var(--color-border-gray);
   height: 2.4em;
-  padding-block: 0.1em;
+  padding: 0.1em 0 0.1em calc(1em + var(--depth) * 0.8em);
 }
-table.items .actions {
+.items-table td:last-child {
-  display: flex;
+  padding-inline-end: 0.1em;
+}
+.items-table :is(form, input, select, textarea):only-child {
+  margin-inline-start: calc(-0.4em - 0.9px);
+}
+/* For <a> to fill table cell completely, we use an `::after` pseudoelement. */
+/* TODO: expand to whole row? will require adjusting z-index on inputs/buttons */
+.items-table td:has(> .link) {
+  position: relative;
+}
+.items-table .link::after {
+  content: '';
+  inset: -1px 0 0 0;
+  position: absolute;
+}
+.items-table .flex {
   gap: 0.4em;
   justify-content: end;
 }
-table.items .actions.centered {
+.items-table .dropzone {
-  justify-content: center;
-}
-table.items tr.dropzone {
   position: relative;
 }
-table.items tr.dropzone::after {
+.items-table .dropzone::after {
   content: '';
   inset: 1px 0 0 0;
   position: absolute;
@@ -469,123 +509,57 @@ table.items tr.dropzone::after {
   outline-offset: -1px;
   z-index: var(--z-index-table-row-outline);
 }
-table.items td.handle {
+.items-table .handle {
-  cursor: move;
+  cursor: grab;
 }
-table.items tr.form td {
+.items-table .form td {
   vertical-align: top;
 }
-
+.items-table td:not(:first-child),
-/* TODO: replace `:hover:focus-visible` combos with proper LOVE style order. */
-/* TODO: update table styling: simplify selectors, deduplicate, remove non-font rem. */
-table.items td.link a:hover,
-table.items td.link a:focus-visible,
-table.items td.link a:hover:focus-visible {
-  text-decoration: underline;
-  text-decoration-thickness: 0.05rem;
-  text-underline-offset: 0.2rem;
-}
-table.items td.link a:hover {
-  color: var(--color-blue);
-}
-table.items td.link a:focus-visible {
-  text-decoration-color: var(--color-gray);
-}
-table.items td.link a:hover:focus-visible {
-  color: var(--color-dark-blue);
-}
-
-table.items td:not(:first-child),
 .grayed {
   color: var(--color-table-gray);
-  fill: var(--color-table-gray);
+  fill: var(--color-gray);
 }
-table.items svg {
+.items-table td:has(> svg:only-child) {
-  height: 1rem;
-  vertical-align: middle;
-  width: 1rem;
-}
-table.items svg:last-child {
-  height: 1.2rem;
-  width: 1.2rem;
-}
-table.items td.svg {
   text-align: center;
 }
-table.items td.number {
-  text-align: right;
-}
-table.items .button {
-  font-weight: normal;
-  height: 100%;
-  padding: 0.4em;
-}
-table.items input:not([type=submit]):not([type=checkbox]),
-table.items select,
-table.items textarea {
-  padding-block: 0.375em;
-}
-
-table input,
-table select,
-table summary,
-table textarea {
-  border-color: var(--color-border-gray);
-}
-table select {
-  color: var(--color-table-gray);
-}
-table select:hover,
-table select:focus-within,
-table select:focus-visible {
-  color: black;
-}
-table .button {
-  border-color: var(--color-border-gray);
-  color: var(--color-table-gray);
-}
 
 
-form table.items {
+.center {
-  border: none;
-}
-form table.items td {
-  border: none;
-  text-align: left;
-  vertical-align: middle;
-}
-form table.items td:first-child {
-  color: inherit;
-}
-form table select {
-  color: black;
-}
-
-
-.centered {
   margin: 0 auto;
 }
-.extendedright {
-  margin-right: auto;
-}
 .hexpand {
   width: 100%;
 }
-.hflex {
+.flex {
   display: flex;
   gap: 0.8em;
 }
-.hflex.centered {
+.flex.reverse {
-  justify-content: center;
+  flex-direction: row-reverse;
 }
-.vexpand {
+.flex.vertical {
-  width: 100%;
-}
-.vflex {
-  display: flex;
-  gap: 0.8em;
   flex-direction: column;
 }
+.hint {
+  color: var(--color-table-gray);
+  font-style: italic;
+  font-size: 0.9rem;
+  text-align: center;
+}
+.hmin50 {
+  min-width: 50%;
+}
+.italic {
+  color: var(--color-gray);
+  font-style: italic;
+}
+.ralign {
+  text-align: right;
+}
+.rextend {
+  margin-right: auto;
+}
 
 
 details {
@@ -596,12 +570,12 @@ summary {
   align-items: center;
   color: var(--color-gray);
   display: flex;
-  gap: 0.2em;
+  gap: 0.4em;
   height: 100%;
   white-space: nowrap;
 }
 summary::before {
-  background-color: #000;
+  background-color: currentColor;
   content: "";
   height: 1em;
   mask-image: url('pictograms/chevron-down.svg');
@@ -624,14 +598,14 @@ summary span {
   width: 100%;
 }
 details[open] summary::before {
-  transform: rotate(180deg);
+  transform: scaleY(-1);
 }
 summary::marker {
   padding-left: 0.25em;
 }
 /* NOTE: use `details[open]::details-content` once widely available. */
 details[open] ul {
-  background: white;
+  background-color: white;
   border: 1px solid var(--color-border-gray);
   border-radius: 0.25em;
   box-shadow: 1px 1px 3px var(--color-border-gray);
@@ -661,3 +635,8 @@ li::marker {
  * * focused label styling (currently only checkbox has focus),
  * * disabled checkbox blue square focus removal.
  * */
+
+#measurement_form {
+  min-width: 66%;
+  width: max-content;
+}

app/controllers/application_controller.rb

@@ -9,7 +9,6 @@ class ApplicationController < ActionController::Base
   helper_method :current_user_disguised?
   helper_method :current_tab
 
-  before_action :redirect_to_setup_if_needed
   before_action :authenticate_user!
 
   class AccessForbidden < StandardError; end
@@ -56,16 +55,6 @@ class ApplicationController < ActionController::Base
 
   private
 
-  # Redirect to the web setup wizard when the application has not yet been
-  # initialised (i.e. no admin account exists in the database).
-  def redirect_to_setup_if_needed
-    return if User.exists?(status: :admin)
-    redirect_to new_setup_path
-  rescue ActiveRecord::StatementInvalid
-    # Tables may not exist yet (migrations not run). Fall through and let the
-    # normal request handling surface a meaningful error.
-  end
-
   def render_no_content(record)
     helpers.render_errors(record)
     render html: nil, layout: true

app/controllers/measurements_controller.rb

@@ -1,13 +1,7 @@
 class MeasurementsController < ApplicationController
-  before_action except: :index do
-    raise AccessForbidden unless current_user.at_least(:active)
-  end
-
   def index
-    readouts = current_user.readouts.includes(:quantity, :unit).order(created_at: :desc)
+    @measurements = []
-    @measurements = readouts.group_by(&:created_at).map do |created_at, grouped|
+    #@measurements = current_user.units.ordered.includes(:base, :subunits)
-      Measurement.new(created_at: created_at, readouts: grouped)
-    end
   end
 
   def new
@@ -15,33 +9,8 @@ class MeasurementsController < ApplicationController
   end
 
   def create
-    timestamp = Time.current
-    @readouts = readout_params.map do |rp|
-      r = current_user.readouts.new(rp)
-      r.created_at = timestamp
-      r
-    end
-
-    if @readouts.all?(&:valid?)
-      Readout.transaction { @readouts.each(&:save!) }
-      @measurement = Measurement.new(readouts: @readouts, created_at: timestamp)
-      flash.now[:notice] = t('.success')
-    else
-      render :new, status: :unprocessable_entity
-    end
   end
 
   def destroy
-    @measurement = Measurement.new(id: params[:id].to_i,
-                                   created_at: Time.at(params[:id].to_i))
-    current_user.readouts.where(created_at: @measurement.created_at).delete_all
-    @measurements_empty = current_user.readouts.empty?
-    flash.now[:notice] = t('.success')
-  end
-
-  private
-
-  def readout_params
-    params.require(:readouts).map { |r| r.permit(:quantity_id, :value, :unit_id) }
   end
 end

app/controllers/readouts_controller.rb

@@ -1,23 +1,16 @@
 class ReadoutsController < ApplicationController
-  before_action :find_quantity, only: [:new, :discard]
+  before_action :find_quantities, only: [:new]
+  before_action :find_quantity, only: [:discard]
   before_action :find_prev_quantities, only: [:new, :discard]
 
   def new
-    new_quantities =
+    @quantities -= @prev_quantities
-      case params[:button]
+    # TODO: raise ParameterInvalid if new_quantities.empty?
-      when 'children'
+    @readouts = current_user.readouts.build(@quantities.map { |q| {quantity: q} })
-        @quantity.subquantities
-      when 'subtree'
-        @quantity.progenies
-      else
-        [@quantity]
-      end
-    new_quantities -= @prev_quantities
-    @readouts = current_user.readouts.build(new_quantities.map { |q| {quantity: q} })
 
     @user_units = current_user.units.ordered
 
-    quantities = @prev_quantities + new_quantities
+    quantities = @prev_quantities + @quantities
     @superquantity = current_user.quantities
       .common_ancestors(quantities.map(&:parent_id)).first
   end
@@ -31,6 +24,9 @@ class ReadoutsController < ApplicationController
 
   private
 
+  def find_quantities
+    @quantities = current_user.quantities.find(params[:quantity])
+  end
 
   def find_quantity
     @quantity = current_user.quantities.find_by!(id: params[:id])

app/controllers/setup_controller.rb

@@ -1,59 +0,0 @@
-# Handles the one-time web-based installation wizard.
-#
-# The wizard is only accessible when no admin account exists yet.  Once an
-# admin has been created the controller redirects every request to the root
-# path, so it can never be used to overwrite an existing installation.
-class SetupController < ActionController::Base
-  # Use the full application layout (header, flash, etc.) so the page looks
-  # consistent with the rest of the site.
-  layout "application"
-
-  before_action :redirect_if_installed
-
-  def new
-  end
-
-  def create
-    email    = params[:admin_email].to_s.strip
-    password = params[:admin_password].to_s
-    confirm  = params[:admin_password_confirmation].to_s
-
-    errors = []
-    errors << t(".email_blank")    if email.blank?
-    errors << t(".password_blank") if password.blank?
-    errors << t(".password_mismatch") if password != confirm
-
-    if errors.any?
-      flash.now[:alert] = errors.join("  ")
-      return render :new, status: :unprocessable_entity
-    end
-
-    user = User.new(email: email, password: password, status: :admin)
-    user.skip_confirmation!
-
-    unless user.save
-      flash.now[:alert] = user.errors.full_messages.join("  ")
-      return render :new, status: :unprocessable_entity
-    end
-
-    # Persist runtime settings chosen during setup.
-    Setting.set("skip_email_confirmation",
-                params[:skip_email_confirmation] == "1")
-
-    # Optionally seed the built-in default units.
-    if params[:seed_units] == "1"
-      load Rails.root.join("db/seeds/units.rb")
-    end
-
-    redirect_to new_user_session_path, notice: t(".success")
-  end
-
-  private
-
-  def redirect_if_installed
-    redirect_to root_path if User.exists?(status: :admin)
-  rescue ActiveRecord::StatementInvalid
-    # Tables are not yet migrated — stay on the setup page so the user sees a
-    # meaningful error rather than a crash.
-  end
-end

app/controllers/user/profiles_controller.rb

@@ -1,24 +1,11 @@
 class User::ProfilesController < Devise::RegistrationsController
   def destroy
-    if current_user.sole_admin?
+    # TODO: Disallow/disable deletion for last admin account; update :edit view
-      redirect_back fallback_location: edit_user_registration_path,
-        alert: t(".sole_admin")
-      return
-    end
     super
   end
 
   protected
 
-  def build_resource(hash = {})
-    super
-    # Skip the email confirmation step when the admin has enabled this option
-    # via the web setup wizard (stored as the "skip_email_confirmation" Setting).
-    # The account becomes active immediately so the user can sign in right after
-    # registering.
-    resource.skip_confirmation! if Setting.get("skip_email_confirmation") == "true"
-  end
-
   def update_resource(resource, params)
     # Based on update_with_password()
     if params[:password].blank?

app/helpers/application_helper.rb

@@ -102,13 +102,17 @@ module ApplicationHelper
 
     def number_field(method, options = {})
       attr_type = object.type_for_attribute(method)
-      if attr_type.type == :decimal
+      case attr_type.type
+      when :decimal
         options[:value] = object.public_send(method)&.to_scientific
         options[:step] ||= BigDecimal(10).power(-attr_type.scale)
         options[:max] ||= BigDecimal(10).power(attr_type.precision - attr_type.scale) -
           options[:step]
         options[:min] = options[:min] == :step ? options[:step] : options[:min]
         options[:min] ||= -options[:max]
+        options[:size] ||= attr_type.precision / 2
+      when :float
+        options[:size] ||= 6
       end
       super
     end
@@ -148,7 +152,8 @@ module ApplicationHelper
   end
 
   def tabular_form_with(**options, &block)
-    extra_options = {builder: TabularFormBuilder, html: {autocomplete: 'off'}}
+    extra_options = {builder: TabularFormBuilder, class: 'tabular-form',
+                     html: {autocomplete: 'off'}}
     form_with(**merge_attributes(options, extra_options), &block)
   end
 

app/helpers/quantities_helper.rb

@@ -1,9 +1,9 @@
 module QuantitiesHelper
-  def quantities_check_boxes
+  def quantities_check_boxes(quantities)
     # Closing <details> on focusout event depends on relatedTarget for internal
     # actions being non-null. To ensure this, all top-layer elements of
     # ::details-content must accept focus, e.g. <label> needs tabindex="-1" */
-    collection_check_boxes(nil, :quantity, @quantities, :id, :to_s_with_depth,
+    collection_check_boxes(nil, :quantity, quantities, :id, :to_s_with_depth,
                            include_hidden: false) do |b|
       content_tag :li, b.label(tabindex: -1) { b.check_box + b.text }
     end

app/models/measurement.rb

@@ -1,17 +1,3 @@
 class Measurement
   include ActiveModel::Model
-
-  attr_accessor :readouts, :created_at
-
-  def id
-    created_at.to_i
-  end
-
-  def to_param
-    id.to_s
-  end
-
-  def persisted?
-    true
-  end
 end

app/models/quantity.rb

@@ -15,8 +15,8 @@ class Quantity < ApplicationRecord
     errors.add(:parent, :descendant_reference) if ancestor_of?(parent)
   end
   validates :name, presence: true, uniqueness: {scope: [:user_id, :parent_id]},
-    length: {maximum: type_for_attribute(:name).limit || Float::INFINITY}
+    length: {maximum: type_for_attribute(:name).limit}
-  validates :description, length: {maximum: type_for_attribute(:description).limit || Float::INFINITY}
+  validates :description, length: {maximum: type_for_attribute(:description).limit}
 
   # Update :depths of progenies after parent change
   before_save if: :parent_changed? do
@@ -61,8 +61,8 @@ class Quantity < ApplicationRecord
 
   # Return: ordered [sub]hierarchy
   scope :ordered, ->(root: nil, include_root: true) {
-    if connection.adapter_name =~ /mysql/i
     numbered = Arel::Table.new('numbered')
+
     self.model.with(numbered: numbered(:parent_id, :name)).with_recursive(arel_table.name => [
       numbered.project(
         numbered[Arel.star],
@@ -73,14 +73,6 @@ class Quantity < ApplicationRecord
         arel_table[:path].concat(numbered[:child_number])
       ).join(arel_table).on(numbered[:parent_id].eq(arel_table[:id]))
     ]).order(arel_table[:path])
-    elsif root.nil?
-      # SQLite: pathname column already stores the full hierarchical path
-      order(:pathname)
-    else
-      root_pathname = unscoped.where(id: root).pick(:pathname)
-      scope = order(:pathname).where("pathname LIKE ?", "#{root_pathname}#{PATHNAME_DELIMITER}%")
-      include_root ? scope.or(where(id: root)) : scope
-    end
   }
 
   # TODO: extract named functions to custom Arel extension

app/models/setting.rb

@@ -1,20 +0,0 @@
-# Key-value store for runtime application settings that are configured through
-# the web setup wizard (or updated by an administrator) rather than hard-coded
-# in application.rb.
-#
-# Known keys:
-#   skip_email_confirmation  – "true"/"false", mirrors the homonymous option
-#                              that was previously in application.rb.
-class Setting < ApplicationRecord
-  validates :key, presence: true, uniqueness: true
-
-  # Return the string value stored for +key+, or +default+ when absent.
-  def self.get(key, default: nil)
-    find_by(key: key)&.value || default
-  end
-
-  # Persist +value+ for +key+, creating the record if it does not yet exist.
-  def self.set(key, value)
-    find_or_initialize_by(key: key).update!(value: value.to_s)
-  end
-end

app/models/unit.rb

@@ -12,8 +12,8 @@ class Unit < ApplicationRecord
     errors.add(:base, :multilevel_nesting) if base.base_id?
   end
   validates :symbol, presence: true, uniqueness: {scope: :user_id},
-    length: {maximum: type_for_attribute(:symbol).limit || Float::INFINITY}
+    length: {maximum: type_for_attribute(:symbol).limit}
-  validates :description, length: {maximum: type_for_attribute(:description).limit || Float::INFINITY}
+  validates :description, length: {maximum: type_for_attribute(:description).limit}
   validates :multiplier, numericality: {equal_to: 1}, unless: :base
   validates :multiplier, numericality: {greater_than: 0, precision: true, scale: true}, if: :base
 
@@ -26,8 +26,10 @@ class Unit < ApplicationRecord
     other_bases_units = arel_table.alias('other_bases_units')
     sub_units = arel_table.alias('sub_units')
 
+    # TODO: move inner 'with' CTE to outer 'with recursive' - it can have multiple
+    # CTEs, even non recursive ones.
     Unit.with_recursive(actionable_units: [
-      self.or(Unit.defaults).left_joins(:base)
+      Unit.with(units: self.or(Unit.defaults)).left_joins(:base)
         .where.not(
           # Exclude Units that are/have default counterpart
           Arel::SelectManager.new.project(1).from(other_units)
@@ -63,14 +65,8 @@ class Unit < ApplicationRecord
         ),
       # Fill base Units to display proper hierarchy. Duplicates will be removed
       # by final group() - can't be deduplicated with UNION due to 'portable' field.
-      # Use ActiveRecord::Relation (not a raw SelectManager) so the SQLite Arel
+      arel_table.join(actionable_units).on(actionable_units[:base_id].eq(arel_table[:id]))
-      # visitor does not wrap it in parentheses inside the UNION ALL CTE body.
+        .project(arel_table[Arel.star], Arel::Nodes.build_quoted(nil).as('portable'))
-      Unit.joins(
-        arel_table.create_join(
-          actionable_units,
-          arel_table.create_on(actionable_units[:base_id].eq(arel_table[:id]))
-        )
-      ).select(arel_table[Arel.star], Arel::Nodes.build_quoted(nil).as('portable'))
     ]).select(units: [:base_id, :symbol])
       .select(
         units[:id].minimum.as('id'), # can be ANY_VALUE()
@@ -78,7 +74,7 @@ class Unit < ApplicationRecord
         Arel::Nodes.build_quoted(1).as('multiplier'), # disregard multiplier when sorting
         units[:portable].minimum.as('portable')
       )
-      .from(units).group(units[:base_id], units[:symbol])
+      .from(units).group(:base_id, :symbol)
   }
   scope :ordered, ->{
     left_outer_joins(:base).order(ordering)
@@ -87,8 +83,8 @@ class Unit < ApplicationRecord
   def self.ordering
     [arel_table.coalesce(Arel::Table.new(:bases_units)[:symbol], arel_table[:symbol]),
      arel_table[:base_id].not_eq(nil),
-     arel_table[:multiplier],
+     :multiplier,
-     arel_table[:symbol]]
+     :symbol]
   end
 
   before_destroy do

app/models/user.rb

@@ -29,11 +29,4 @@ class User < ApplicationRecord
   def at_least(status)
     User.statuses[self.status] >= User.statuses[status]
   end
-
-  # Returns true when this user is the only admin account in the system.
-  # Used to block actions that would leave the application without an admin
-  # (account deletion, status demotion).
-  def sole_admin?
-    admin? && !User.admin.where.not(id: id).exists?
-  end
 end

app/views/default/units/_unit.html.erb

@@ -5,7 +5,7 @@
   </td>
 
   <% if current_user.at_least(:active) %>
-    <td class="actions">
+    <td class="flex">
       <% unless unit.portable.nil? %>
         <% if unit.default? %>
           <%= image_button_to_if unit.portable?, t('.import'), 'download-outline',

app/views/default/units/index.html.erb

@@ -8,7 +8,7 @@
     class: 'tools-area' %>
 </div>
 
-<table class="main-area items">
+<table class="main-area items-table">
   <thead>
     <tr>
       <th><%= Unit.human_attribute_name(:symbol) %></th>

app/views/layouts/application.html.erb

@@ -23,10 +23,10 @@
   </head>
 
   <body>
-    <header class="hflex">
+    <header class="flex">
       <%= image_link_to t(".source_code"), "code-braces", source_code_url %>
       <%= image_link_to t(".issue_tracker"), "bug-outline", issue_tracker_url,
-            class: "extendedright" %>
+        class: "rextend" %>
       <% if user_signed_in? %>
         <%= image_link_to_unless_current(current_user, "account-wrench-outline",
           edit_user_registration_path) %>

app/views/measurements/_form.html.erb

@@ -1,23 +1,37 @@
-<%= tabular_form_with model: Measurement.new do |form| %>
+<%= tabular_form_with model: Measurement.new, id: :measurement_form,
-  <fieldset>
+  class: 'topside-area flex vertical center',
-    <table class="items centered">
+  html: {onkeydown: 'formProcessKey(event)'} do |form| %>
+
+  <table class="items-table center">
     <tbody id="readouts">
-        <tr id="readouts_form">
+      <%= tabular_fields_for @measurement do |form| %>
-          <td colspan="4">
+        <tr class="italic">
-            <%= collection_select :quantity, :id, @quantities, :id, :to_s_with_depth,
+          <td class="hexpand hmin50"><%= t '.taken_at_html' %></td>
-              {prompt: t('.select_quantity'), disabled: '', selected: ''},
+          <td colspan="3" class="ralign">
-              {name: :id, class: 'quantity vexpand',
+            <%= form.datetime_field :taken_at, required: true %>
-               onchange: "this.form.requestSubmit(new_readout_submit);"} %>
-            <%= form.submit id: :new_readout_submit, name: nil, value: nil,
-              formaction: new_readout_path, formmethod: :get, formnovalidate: true,
-              hidden: true, data: {turbo_stream: true} %>
           </td>
         </tr>
+      <% end %>
     </tbody>
   </table>
-  </fieldset>
+
-  <div class="hflex centered">
+  <%# TODO: right-click selection; unnecessary with hierarchical tags? %>
-    <%= form.button -%>
+  <details id="quantity_select" class="center hexpand" open
+           onkeydown="detailsProcessKey(event)">
+    <summary autofocus>
+      <!-- TODO: Set content with CSS when span empty to avoid duplication -->
+      <span data-prompt="<%= t('.select_quantity') %>">
+        <%= t('.select_quantity') %>
+      </span>
+      <%= image_button_tag t(:apply), "update", name: nil, disabled: true,
+        formaction: new_readout_path, formmethod: :get, formnovalidate: true,
+        data: {turbo_stream: true} %>
+    </summary>
+    <ul><%= quantities_check_boxes(@quantities) %></ul>
+  </details>
+
+  <div class="flex reverse">
+    <%= form.button id: :create_measurement_button, disabled: true -%>
     <%= image_link_to t(:cancel), "close-outline", measurements_path, name: :cancel,
       class: 'dangerous', onclick: render_turbo_stream('form_close') %>
   </div>

app/views/measurements/_form_close.html.erb

@@ -1,4 +1,3 @@
-<%= turbo_stream.update :measurement_form %>
 <%= turbo_stream.update :flashes %>
 <%= turbo_stream.remove :measurement_form %>
 <%= turbo_stream.show :no_items -%>

app/views/measurements/_measurement.html.erb

@@ -1,14 +0,0 @@
-<%= tag.tr id: dom_id(measurement) do %>
-  <td><%= l measurement.created_at, format: :short %></td>
-  <td>
-    <% measurement.readouts.each do |readout| %>
-      <span><%= readout.quantity.name %>: <%= readout.value %> <%= readout.unit %></span>
-    <% end %>
-  </td>
-  <% if current_user.at_least(:active) %>
-    <td class="actions">
-      <%= image_button_to t('.destroy'), 'delete-outline', measurement_path(measurement),
-        method: :delete %>
-    </td>
-  <% end %>
-<% end %>

app/views/measurements/create.turbo_stream.erb

@@ -1,5 +0,0 @@
-<%= turbo_stream.update :flashes %>
-<%= turbo_stream.remove :measurement_form %>
-<%= turbo_stream.remove :no_items %>
-<%= turbo_stream.enable :new_measurement_link %>
-<%= turbo_stream.prepend :measurements, @measurement %>

app/views/measurements/destroy.turbo_stream.erb

@@ -1,3 +0,0 @@
-<%= turbo_stream.update :flashes %>
-<%= turbo_stream.remove @measurement %>
-<%= turbo_stream.append(:measurements, render_no_items) if @measurements_empty %>

app/views/measurements/index.html.erb

@@ -1,5 +1,5 @@
 <%# TODO: show hint when no quantities/units defined %>
-<div class="rightside buttongrid">
+<div class="rightside-area buttongrid">
   <% if current_user.at_least(:active) %>
     <%= image_link_to t('.new_measurement'), 'plus-outline', new_measurement_path,
       id: :new_measurement_link, onclick: 'this.blur();',
@@ -7,9 +7,7 @@
   <% end %>
 </div>
 
-<%= tag.div class: 'topside', id: :measurement_form %>
+<table class="main-area">
-
-<table class="main">
   <tbody id="measurements">
     <%= render(@measurements) || render_no_items %>
   </tbody>

app/views/measurements/new.turbo_stream.erb

@@ -1,4 +1,5 @@
 <%= turbo_stream.disable :new_measurement_link -%>
-<%= turbo_stream.update :measurement_form do %>
+<%= turbo_stream.hide :no_items -%>
+<%= turbo_stream.append_all 'body' do %>
   <%= render partial: 'form' %>
 <% end %>

app/views/quantities/_form.html.erb

@@ -9,7 +9,7 @@
       <%= form.text_area :description, cols: 30, rows: 1, escape: false %>
     </td>
 
-    <td class="actions">
+    <td class="flex">
       <%= form.button %>
       <%= image_link_to t(:cancel), "close-outline", quantities_path, class: 'dangerous',
         name: :cancel, onclick: render_turbo_stream('form_close', {row: row}) %>

app/views/quantities/_quantity.html.erb

@@ -5,14 +5,14 @@
            data: {drag_path: reparent_quantity_path(quantity), drop_id: dom_id(quantity),
                   drop_id_param: "quantity[parent_id]"} do %>
 
-  <td class="link" style="--depth:<%= quantity.depth %>">
+  <td style="--depth:<%= quantity.depth %>">
-    <%= link_to quantity, edit_quantity_path(quantity), onclick: 'this.blur();',
+    <%= link_to quantity, edit_quantity_path(quantity), class: 'link',
-      data: {turbo_stream: true} %>
+      onclick: 'this.blur();', data: {turbo_stream: true} %>
   </td>
   <td><%= quantity.description %></td>
 
   <% if current_user.at_least(:active) %>
-    <td class="actions">
+    <td class="flex">
       <%= image_link_to t('.new_subquantity'), 'plus-outline', new_quantity_path(quantity),
         id: dom_id(quantity, :new, :link), onclick: 'this.blur();', data: {turbo_stream: true} %>
 

app/views/quantities/index.html.erb

@@ -8,13 +8,14 @@
     class: 'tools-area' %>
 </div>
 
+<%# TODO: remove? form can be inserted directly, e.g. at the end of index %>
 <%= tag.div class: 'main-area', id: :quantity_form %>
 
-<table class="main-area items">
+<table class="main-area items-table">
   <thead>
     <tr>
       <th><%= Quantity.human_attribute_name(:name) %></th>
-      <th><%= Quantity.human_attribute_name(:description) %></th>
+      <th class="hexpand"><%= Quantity.human_attribute_name(:description) %></th>
       <% if current_user.at_least(:active) %>
         <th><%= t :actions %></th>
         <th></th>

app/views/readouts/_form.html.erb

@@ -1,20 +1,22 @@
 <%# TODO: add readout reordering by dragging %>
 <%= tabular_fields_for 'readouts[]', readout do |form| %>
-  <%- tag.tr id: dom_id(readout.quantity, :new, :readout),
+  <%- tag.tr id: dom_id(readout.quantity, :new, :readout) do %>
-             onkeydown: 'processKey(event)' do %>
     <td>
+      <%# TODO: add grayed readout index (in separate column?) %>
       <%= readout.quantity.relative_pathname(@superquantity) %>
-    </td>
-    <td>
-      <%= form.number_field :value, required: true, autofocus: true, size: 10 %>
-    </td>
-    <td>
       <%= form.hidden_field :quantity_id %>
-      <%= form.collection_select :unit_id, @user_units, :id,
-        ->(u){ sanitize('&emsp;' * (u.base_id ? 1 : 0) + u.symbol) } %>
     </td>
-    <td class="actions">
+    <td>
-      <%= image_button_tag '', 'delete-outline', class: 'dangerous', name: :discard,
+      <%= form.number_field :value, required: true, autofocus: readout_counter == 0 %>
+    </td>
+    <td>
+      <%= form.collection_select :unit_id, @user_units, :id,
+        ->(u){ sanitize('&emsp;' * (u.base_id ? 1 : 0) + u.symbol) },
+        {prompt: '', disabled: '', selected: ''}, required: true %>
+    </td>
+    <td class="flex">
+      <%# TODO: change to _link_ after giving up displaying relative paths %>
+      <%= image_button_tag '', 'delete-outline', class: 'dangerous', name: nil,
         formaction: discard_readouts_path(readout.quantity),
         formmethod: :get, formnovalidate: true, data: {turbo_stream: true} %>
     </td>

app/views/readouts/discard.turbo_stream.erb

@@ -1,4 +1,4 @@
+<%= turbo_stream.disable :create_measurement_button if @prev_quantities.one? %>
 <%= turbo_stream.remove dom_id(@quantity, :new, :readout) %>
-<%= turbo_stream.disable_all 'button[name="discard"]' if @prev_quantities.one? %>
-<%= turbo_stream.enable_all "select.quantity option[value='#{@quantity.id}']" %>
 <%= render partial: 'form_repath' %>
+<%= turbo_stream.unselect dom_id(@quantity) %>

app/views/readouts/new.turbo_stream.erb

@@ -1,9 +1,8 @@
-<%= render partial: 'form_repath' %>
-<%# is .one? proper condition? can @readouts be empty? %>
-<%= turbo_stream.enable_all 'button[name="discard"]' if @prev_quantities.one? %>
 <% @readouts.each do |r| %>
-  <%= turbo_stream.disable_all "select.quantity option[value='#{r.quantity_id}']" %>
+  <%= turbo_stream.disable dom_id(r.quantity) %>
 <% end %>
-<%= turbo_stream.before :readouts_form do %>
+<%= render partial: 'form_repath' %>
+<%= turbo_stream.append :readouts do %>
   <%= render partial: 'form', collection: @readouts, as: :readout %>
 <% end %>
+<%= turbo_stream.enable :create_measurement_button if @prev_quantities.empty? %>

app/views/setup/new.html.erb

@@ -1,39 +0,0 @@
-<%= form_with url: setup_path, method: :post, class: "labeled-form main-area" do %>
-
-  <h3 style="grid-column: 1 / -1; text-align: left; margin: 0;">
-    <%= t(".admin_account") %>
-  </h3>
-
-  <label for="admin_email"><%= t(".admin_email") %></label>
-  <%= email_field_tag :admin_email, params[:admin_email],
-        id: "admin_email", required: true, size: 30, autofocus: true,
-        autocomplete: "email" %>
-
-  <label for="admin_password"><%= t(".admin_password") %></label>
-  <%= password_field_tag :admin_password, nil,
-        id: "admin_password", required: true, size: 30,
-        autocomplete: "new-password" %>
-
-  <label for="admin_password_confirmation"><%= t(".admin_password_confirmation") %></label>
-  <%= password_field_tag :admin_password_confirmation, nil,
-        id: "admin_password_confirmation", required: true, size: 30,
-        autocomplete: "off" %>
-
-  <h3 style="grid-column: 1 / -1; text-align: left; margin: 0.5em 0 0 0;">
-    <%= t(".options") %>
-  </h3>
-
-  <label for="skip_email_confirmation" style="grid-column: 1 / 3; text-align: left;">
-    <%= check_box_tag :skip_email_confirmation, "1",
-          params[:skip_email_confirmation] == "1",
-          id: "skip_email_confirmation" %>
-    <%= t(".skip_email_confirmation") %>
-  </label>
-
-  <label for="seed_units" style="grid-column: 1 / 3; text-align: left;">
-    <%= check_box_tag :seed_units, "1", true, id: "seed_units" %>
-    <%= t(".seed_units") %>
-  </label>
-
-  <%= submit_tag t(".submit") %>
-<% end %>

app/views/units/_form.html.erb

@@ -8,11 +8,11 @@
     <td>
       <%= form.text_area :description, cols: 30, rows: 1, escape: false %>
     </td>
-    <td class="number">
+    <td>
       <%= form.number_field :multiplier, required: true, size: 10, min: :step if @unit.base_id? %>
     </td>
 
-    <td class="actions">
+    <td class="flex">
       <%= form.button %>
       <%= image_link_to t(:cancel), "close-outline", units_path, class: 'dangerous',
         name: :cancel, onclick: render_turbo_stream('form_close', {row: row}) %>

app/views/units/_unit.html.erb

@@ -6,14 +6,15 @@
                   drop_id: dom_id(unit.base || unit),
                   drop_id_param: "unit[base_id]"} do %>
 
-  <td class="link" style="--depth:<%= unit.base_id? ? 1 : 0 %>">
+  <td style="--depth:<%= unit.base_id? ? 1 : 0 %>">
-    <%= link_to unit, edit_unit_path(unit), onclick: 'this.blur();', data: {turbo_stream: true} %>
+    <%= link_to unit, edit_unit_path(unit), class: 'link', onclick: 'this.blur();',
+      data: {turbo_stream: true} %>
   </td>
   <td><%= unit.description %></td>
-  <td class="number"><%= unit.multiplier.to_html %></td>
+  <td class="ralign"><%= unit.multiplier.to_html %></td>
 
   <% if current_user.at_least(:active) %>
-    <td class="actions">
+    <td class="flex">
       <% unless unit.base_id? %>
         <%= image_link_to t('.new_subunit'), 'plus-outline', new_unit_path(unit),
           id: dom_id(unit, :new, :link), onclick: 'this.blur();', data: {turbo_stream: true} %>

app/views/units/index.html.erb

@@ -7,13 +7,14 @@
     class: 'tools-area' %>
 </div>
 
+<%# TODO: remove? form can be inserted directly, e.g. at the end of index %>
 <%= tag.div id: :unit_form %>
 
-<table class="main-area items">
+<table class="main-area items-table">
   <thead>
     <tr>
       <th><%= Unit.human_attribute_name(:symbol) %></th>
-      <th><%= Unit.human_attribute_name(:description) %></th>
+      <th class="hexpand"><%= Unit.human_attribute_name(:description) %></th>
       <th><%= Unit.human_attribute_name(:multiplier) %></th>
       <% if current_user.at_least(:active) %>
         <th><%= t :actions %></th>

app/views/users/index.html.erb

@@ -1,4 +1,4 @@
-<table class="main-area items" id="users">
+<table class="main-area items-table" id="users">
   <thead>
     <tr>
       <th><%= User.human_attribute_name(:email) %></th>
@@ -11,7 +11,7 @@
   <tbody>
     <% @users.each do |user| %>
       <tr>
-        <td class="link"><%= link_to user, user_path(user) %></td>
+        <td><%= link_to user, user_path(user), class: 'link' %></td>
         <td>
           <% if user == current_user %>
             <%= user.status %>
@@ -22,11 +22,11 @@
             <% end %>
           <% end %>
         </td>
-        <td class="svg">
+        <td>
           <%= svg_tag 'pictograms/checkbox-marked-outline' if user.confirmed_at.present? %>
         </td>
         <td><%= l user.created_at, format: :without_tz %></td>
-        <td class="actions">
+        <td class="flex">
           <% if allow_disguise?(user) %>
             <%= image_link_to t('.disguise'), 'incognito', disguise_user_path(user) %>
           <% end %>

app/views/users/profiles/edit.html.erb

@@ -4,8 +4,9 @@
 <% end %>
 
 <div class="rightside-area buttongrid">
-  <%= image_button_to_if !current_user.sole_admin?, t('.delete'), 'account-remove-outline',
+  <%#= TODO: Disallow/disable deletion for last admin account, image_button_to_if %>
-    user_registration_path, form_class: 'tools-area', method: :delete, data: {turbo: false},
+  <%= image_button_to t('.delete'), 'account-remove-outline', user_registration_path,
+    form_class: 'tools-area', method: :delete, data: {turbo: false},
     onclick: {confirm: t('.confirm_delete')} %>
 </div>
 

app/views/users/profiles/new.html.erb

@@ -10,7 +10,6 @@
 
   <%= f.submit t(:register), data: {turbo: false} %>
 
-  <%# TODO: fix button text color after change link -> button %>
   <%= image_button_tag t(:resend_confirmation), 'email-sync-outline',
     class: 'auxiliary', formaction: user_confirmation_path, formnovalidate: true,
     data: {validate: f.field_id(:email)} %>

app/views/users/unlocks/new.html.erb

@@ -8,7 +8,7 @@
     <%= f.email_field :email, autofocus: true, autocomplete: "email" %>
   </div>
 
-  <div class="actions">
+  <div class="flex">
     <%= f.submit "Resend unlock instructions" %>
   </div>
 <% end %>

config/application.rb.dist

@@ -20,6 +20,10 @@ Bundler.require(*Rails.groups)
 
 module FixinMe
   class Application < Rails::Application
+    # Allow RAILS_DATABASE_YML to override the database config file path.
+    # Used by `rails test:all_databases` to test against multiple DB adapters.
+    config.paths['config/database'] = [ENV['RAILS_DATABASE_YML']] if ENV['RAILS_DATABASE_YML']
+
     # Initialize configuration defaults for originally generated Rails version.
     config.load_defaults 7.0
 
@@ -54,9 +58,5 @@ module FixinMe
 
     # Sender address of account registration-related messages
     Devise.mailer_sender = 'noreply@localhost'
-
-    # Whether to skip e-mail confirmation for new registrations is configured
-    # through the web setup wizard and stored in the database (Setting model),
-    # so it does not need to be set here.
   end
 end

config/credentials.yml.enc

@@ -1 +1 @@
-OOGMGhfQuV67kqlMecZLcNfgrGS81KPAGmY27GnohtcGSPtiaqL8OZYsVf5IIOaI1K14ZEflln+E2deaIJ5apaq98f+1gJawGbAJeEfLCskJV/03nT8ICpRk+bxT/lzqeCIaUJOLk4708ufC9EpdpJD/jgVSAuI/iNMzzwMbNFvqNmx0Kmgp0mRpHSDGLZZkaP3GW7wdsJEVsNpSPIrkkGL1BvD+nHbmHjuGkn4MMsmm1Yz0M31jkJiDksT0SVeOcxWvOApclxm6VZOAws2l6YKEs/XoE7ye3ssjxdjdwjMzRXV7dwYclNBQGRoERVTozdYiFR4eAGMdlG0RsnUAp+edILH5nvHCIPb3la/dUTOzAQMNY0TqMMVUHGqGuVS/EMCX/w7zrmYN5C+2W8SfugrvTpAL--dUdvsDfbUdVrbmmo--fUwsWUp+DQGPtEF+Zq4ZTw==
+3nm9KZNtyLhPgZBVzOOkN2FXHD0uEMuzgb5Sl1MrAMmi6+iEFSzyTHfZFW2mz18VyNz5DDYvTODZqBDQKK+FQh70uEQkmGqaY5XsTOzUFzk56quaPNtZvFEGux1nX2avSbYQBs3HeyYyWyTAFhez5j8tVb6sZD2xZ8twa9KAB42j86NIHT9w/ZMFqZbGbdBoR1Mrqoy9/IWv2QgxMTpGR6JBpTUwauXm6wS/bTt8SCXF57JSVgvdw/BxFzoA3Xj6N5E89LbMfh54W2ruMhybka5E7zXN9z0v4oXt8GiYZFIODEYZwqzEVaUK1WXS5qb5OrDJFAzs29Uf/gDrIDx71Lot+jejCS+xFfI9454EnHcVH66wKuwF6ylKupJDffM0hQHplcEfVSq5UiDfbPXm46Vr0g1A--2RrmuzCBuHvYpPNA--ugbuRe7ivfDqeUCt6ahciA==

config/database.yml.dist

@@ -48,3 +48,26 @@ production:
 #test:
 #  <<: *default
 #  database: fixinme_test
+
+# Multi-database testing — `bundle exec rails test:all_databases`
+# ---------------------------------------------------------------
+# Add any number of `test_<name>:` blocks to run the full test suite
+# against additional database adapters in a single command.
+# Each adapter's gem must be available in the bundle:
+#   bundle config --local with "mysql:sqlite"   # mysql + sqlite
+#   bundle config --local with "mysql:pg"       # mysql + postgresql
+#
+# Example — run tests against MySQL and SQLite:
+#
+#test_sqlite:
+#  adapter: sqlite3
+#  database: db/fixinme_test.sqlite3
+#
+# Example — run tests against MySQL and PostgreSQL:
+#
+#test_pg:
+#  adapter: postgresql
+#  database: fixinme_test
+#  username: fixinme
+#  password: Some-password1%
+#  host: localhost

config/environments/test.rb

@@ -58,7 +58,4 @@ Rails.application.configure do
   # config.action_view.annotate_rendered_view_with_filenames = true
 
   config.log_level = :info
-
-  # Allow the default integration test host.
-  config.hosts << "www.example.com"
 end

config/locales/en.yml

@@ -85,19 +85,10 @@ en:
     navigation: Measurements
     no_items: There are no measurements taken. You can Add some now.
     form:
-      select_quantity: select the measured quantity...
+      select_quantity: select quantities...
+      taken_at_html: Measurement taken at 
     index:
       new_measurement: Add measurement
-    create:
-      success: Measurement saved.
-    destroy:
-      success: Measurement deleted.
-    measurement:
-      destroy: Delete
-  readouts:
-    form:
-      select_unit: ...
-      new_children: Children
   quantities:
     navigation: Quantities
     no_items: There are no configured quantities. You can Add some or Import from defaults.
@@ -169,27 +160,7 @@ en:
           New password:
           <br><em>leave blank to keep unchanged</em>
           %{password_length_hint_html}
-  registrations:
-    destroy:
-      sole_admin: You cannot delete the only admin account.
   actions: Actions
-  setup:
-    new:
-      admin_account: Admin account
-      admin_email: 'E-mail:'
-      admin_password: 'Password:'
-      admin_password_confirmation: 'Retype password:'
-      options: Options
-      skip_email_confirmation: Skip e-mail confirmation for new registrations
-      seed_units: Seed built-in default units
-      submit: Set up
-    create:
-      email_blank: E-mail cannot be blank.
-      password_blank: Password cannot be blank.
-      password_mismatch: Passwords do not match.
-      success: >
-        Installation complete. You can now sign in with the admin account you
-        just created.
   add: Add
   apply: Apply
   back: Back

config/routes.rb

@@ -1,10 +1,6 @@
 Rails.application.routes.draw do
-  # Web-based installation wizard — only reachable when no admin exists yet.
-  resource :setup, only: [:new, :create], controller: :setup
-
   resources :measurements
 
-
   resources :readouts, only: [:new] do
     collection {get 'new/:id/discard', action: :discard, as: :discard}
   end

db/migrate/20250121230456_create_readouts.rb

@@ -1,10 +1,14 @@
 class CreateReadouts < ActiveRecord::Migration[7.2]
   def change
     create_table :readouts do |t|
-      t.references :user, null: false, foreign_key: true
+      # Reference :user through :quantity (:measurement may be NULL).
+      t.references :measurement, foreign_key: true
       t.references :quantity, null: false, foreign_key: true
+      # :category + :value + :unit as a separate table? (NumericValue, TextValue)
+      t.integer :category, null: false, default: 0
+      t.float :value, null: false, limit: Float::MANT_DIG
       t.references :unit, foreign_key: true
-      t.decimal :value, null: false, precision: 30, scale: 15
+      # Move to Measurement?
       #t.references :collector, foreign_key: true
       #t.references :device, foreign_key: true
 

db/migrate/20260228171524_create_settings.rb

@@ -1,12 +0,0 @@
-class CreateSettings < ActiveRecord::Migration[7.2]
-  def change
-    create_table :settings do |t|
-      t.string :key, null: false
-      t.string :value
-
-      t.timestamps
-    end
-
-    add_index :settings, :key, unique: true
-  end
-end

db/seeds.rb

@@ -3,17 +3,6 @@
 #   bin/rails db:seed
 # command (or created alongside the database with db:setup).
 # Seeding process should be idempotent.
-#
-# Admin account setup
-# -------------------
-# The preferred way to create the first admin account is through the web setup
-# wizard, which is shown automatically on the first visit when no admin exists.
-# The wizard also lets you configure runtime options (e.g. skip e-mail
-# confirmation) and seed the default units without using the command line.
-#
-# The block below provides an alternative CLI path for headless / automated
-# deployments.  It is skipped when an admin account already exists (e.g. after
-# the web wizard has run).
 
 User.transaction do
   break if User.find_by status: :admin

lib/tasks/test_databases.rake

@@ -0,0 +1,118 @@
+require 'yaml'
+require 'erb'
+require 'tmpdir'
+
+namespace :test do
+  desc <<~DESC
+    Run the full test suite against every test database configured in database.yml.
+
+    Any top-level key that starts with "test" and contains a Hash is treated as a
+    test database configuration:
+
+      test:           # always required — the primary test database
+        adapter: mysql2
+        database: fixinme_test
+        ...
+
+      test_sqlite:    # optional additional databases
+        adapter: sqlite3
+        database: db/fixinme_test.sqlite3
+
+      test_pg:
+        adapter: postgresql
+        database: fixinme_test
+        ...
+
+    For each database the task will:
+      1. Check that the required adapter gem is available (skip with warning if not).
+      2. Run `rails db:test:prepare` to create/migrate the database.
+      3. Run `rails test` and record pass/fail.
+
+    A summary is printed at the end. The task exits non-zero if any database fails.
+  DESC
+  task :all_databases do
+    db_file    = Rails.root.join('config', 'database.yml')
+    all        = YAML.safe_load(ERB.new(db_file.read).result, aliases: true) || {}
+    test_cfgs  = all.select { |k, v| k.to_s.start_with?('test') && v.is_a?(Hash) }
+    non_test   = all.reject { |k, _| k.to_s.start_with?('test') }
+
+    abort "No test database configurations found in #{db_file}." if test_cfgs.empty?
+
+    results = {}
+
+    test_cfgs.each do |name, config|
+      adapter = config['adapter'].to_s
+
+      puts "\n#{'─' * 64}"
+      puts "  #{name}  (adapter: #{adapter})"
+      puts '─' * 64
+
+      unless adapter_available?(adapter)
+        puts "  SKIPPED — gem for '#{adapter}' adapter not available in bundle."
+        puts "  Add it to Gemfile (e.g. `bundle config --local with #{adapter_group(adapter)}`)"
+        results[name] = :skipped
+        next
+      end
+
+      Dir.mktmpdir('rails_test_db_') do |tmpdir|
+        tmp_yml = File.join(tmpdir, 'database.yml')
+        # Write a standalone database.yml with just this config as `test:`
+        # (non-test configs are preserved so boot doesn't fail on `production:` lookup)
+        File.write(tmp_yml, non_test.merge('test' => config).to_yaml)
+
+        env = { 'RAILS_DATABASE_YML' => tmp_yml }
+
+        if system(env, 'bundle exec rails db:test:prepare')
+          results[name] = system(env, 'bundle exec rails test') ? :pass : :fail
+        else
+          results[name] = :prepare_failed
+        end
+      end
+    end
+
+    puts "\n#{'═' * 64}"
+    puts "  SUMMARY"
+    puts '═' * 64
+    results.each do |name, status|
+      adapter = test_cfgs[name]['adapter']
+      icon    = { pass: '✓', fail: '✗', prepare_failed: '✗', skipped: '–' }[status]
+      label   = { pass: 'PASS', fail: 'FAIL',
+                  prepare_failed: 'PREPARE FAILED', skipped: 'SKIPPED' }[status]
+      puts "  #{icon}  #{name.ljust(26)} (#{adapter.ljust(12)})  #{label}"
+    end
+    puts '═' * 64
+
+    failed = results.count { |_, s| s == :fail || s == :prepare_failed }
+    abort "\n  #{failed} database(s) failed." if failed > 0
+  end
+end
+
+private
+
+# Returns true if the gem required for this adapter is loadable.
+ADAPTER_GEMS = {
+  'mysql2'     => 'mysql2',
+  'sqlite3'    => 'sqlite3',
+  'postgresql' => 'pg',
+  'pg'         => 'pg',
+}.freeze
+
+def adapter_available?(adapter)
+  gem_name = ADAPTER_GEMS.fetch(adapter, adapter)
+  require gem_name
+  true
+rescue LoadError
+  false
+end
+
+# Returns the Bundler group name that installs the adapter gem.
+ADAPTER_GROUPS = {
+  'mysql2'     => 'mysql',
+  'sqlite3'    => 'sqlite',
+  'postgresql' => 'postgresql',
+  'pg'         => 'postgresql',
+}.freeze
+
+def adapter_group(adapter)
+  ADAPTER_GROUPS.fetch(adapter, adapter)
+end

lib/tasks/test_multi_db.rake

@@ -1,50 +0,0 @@
-namespace :test do
-  desc "Run Rails tests against all supported database adapters (SQLite, MySQL)"
-  task :all_adapters do
-    # DATABASE_URL overrides the adapter from database.yml at runtime.
-    # MySQL requires the mysql2 gem: bundle install --with mysql
-    adapters = {
-      "SQLite" => {
-        "DATABASE_URL" => "sqlite3:db/test.sqlite3"
-      },
-      "MySQL" => {
-        "DATABASE_URL" => format(
-          "mysql2://%s:%s@%s/%s",
-          ENV.fetch("DATABASE_USERNAME", "root"),
-          ENV.fetch("DATABASE_PASSWORD", ""),
-          ENV.fetch("DATABASE_HOST", "127.0.0.1"),
-          ENV.fetch("DATABASE_NAME", "fixin_test")
-        )
-      }
-    }
-
-    failed = []
-
-    adapters.each do |name, extra_env|
-      puts "\n#{"=" * 60}"
-      puts "  Running tests with #{name}"
-      puts "=" * 60
-
-      env = ENV.to_h.merge("RAILS_ENV" => "test").merge(extra_env)
-
-      # Reset test database; db:drop may fail on first run — that's fine
-      system(env, "bin/rails db:drop")
-      unless system(env, "bin/rails db:create db:schema:load")
-        failed << "#{name} (database setup)"
-        next
-      end
-
-      failed << name unless system(env, "bin/rails test")
-    end
-
-    puts "\n#{"=" * 60}"
-    if failed.any?
-      puts "  FAILED: #{failed.join(", ")}"
-      puts "=" * 60
-      exit 1
-    else
-      puts "  All adapters passed!"
-      puts "=" * 60
-    end
-  end
-end

test/controllers/default/units_controller_test.rb

@@ -1,12 +1,8 @@
 require "test_helper"
 
 class Default::UnitsControllerTest < ActionDispatch::IntegrationTest
-  setup do
-    sign_in users(:alice)
-  end
-
   test "should get index" do
-    get default_units_url
+    get units_defaults_index_url
     assert_response :success
   end
 end

test/controllers/registrations_controller_test.rb

@@ -1,18 +0,0 @@
-require "test_helper"
-
-class RegistrationsControllerTest < ActionDispatch::IntegrationTest
-  test "sole admin cannot delete account" do
-    sign_in users(:admin)
-    delete user_registration_path
-    assert_redirected_to edit_user_registration_path
-    assert_equal t("registrations.destroy.sole_admin"), flash[:alert]
-    assert User.exists?(users(:admin).id)
-  end
-
-  test "non-admin can delete account" do
-    sign_in users(:alice)
-    assert_difference ->{ User.count }, -1 do
-      delete user_registration_path
-    end
-  end
-end

test/controllers/users_controller_test.rb

@@ -2,9 +2,7 @@ require "test_helper"
 
 class UsersControllerTest < ActionDispatch::IntegrationTest
   setup do
-    @admin = users(:admin)
+    @user = users(:one)
-    @user = users(:alice)
-    sign_in @admin
   end
 
   test "should get index" do
@@ -12,25 +10,39 @@ class UsersControllerTest < ActionDispatch::IntegrationTest
     assert_response :success
   end
 
+  test "should get new" do
+    get new_user_url
+    assert_response :success
+  end
+
+  test "should create user" do
+    assert_difference("User.count") do
+      post users_url, params: { user: { email: @user.email, status: @user.status } }
+    end
+
+    assert_redirected_to user_url(User.last)
+  end
+
   test "should show user" do
     get user_url(@user)
     assert_response :success
   end
 
+  test "should get edit" do
+    get edit_user_url(@user)
+    assert_response :success
+  end
+
   test "should update user" do
-    patch user_url(@user), params: { user: { status: :restricted } }, as: :turbo_stream
+    patch user_url(@user), params: { user: { email: @user.email, status: @user.status } }
-    assert_equal "restricted", @user.reload.status
+    assert_redirected_to user_url(@user)
   end
 
-  test "should not update self" do
+  test "should destroy user" do
-    patch user_url(@admin), params: { user: { status: :active } }, as: :turbo_stream,
+    assert_difference("User.count", -1) do
-      headers: { "HTTP_REFERER" => users_url }
+      delete user_url(@user)
-    assert_response :redirect
     end
 
-  test "should forbid non-admin" do
+    assert_redirected_to users_url
-    sign_in @user
-    get users_url
-    assert_response :forbidden
   end
 end

test/system/users_test.rb

@@ -183,7 +183,7 @@ class UsersTest < ApplicationSystemTestCase
   end
 
   test 'delete profile' do
-    user = sign_in user: users.reject(&:admin?).select(&:confirmed?).sample
+    user = sign_in
     # TODO: remove condition after root_url changed to different path than
     # profile in routes.rb
     unless has_current_path?(edit_user_registration_path)
@@ -196,14 +196,6 @@ class UsersTest < ApplicationSystemTestCase
     assert_text t("devise.registrations.destroyed")
   end
 
-  test 'sole admin cannot delete profile' do
-    sign_in user: users(:admin)
-    unless has_current_path?(edit_user_registration_path)
-      first(:link_or_button, users(:admin).email).click
-    end
-    assert find(:button, t("users.registrations.edit.delete"))[:disabled]
-  end
-
   test 'index forbidden for non admin' do
     sign_in user: users.reject(&:admin?).select(&:confirmed?).sample
     visit users_path

test/test_helper.rb

@@ -2,10 +2,6 @@ ENV["RAILS_ENV"] ||= "test"
 require_relative "../config/environment"
 require "rails/test_help"
 
-class ActionDispatch::IntegrationTest
-  include Devise::Test::IntegrationHelpers
-end
-
 class ActiveSupport::TestCase
   # Run tests in parallel with specified workers
   parallelize(workers: :number_of_processors)