Merge upstream/final-form into master

Incorporates WIP alternative measurement form (single select form with
multiple select actions) and readouts controller.

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

.gitea/workflows/test.yml

@@ -0,0 +1,74 @@
+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

@@ -1,34 +0,0 @@
-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

@@ -18,12 +18,14 @@
 /* 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>, <table>, <a> as link/button),
+ * differently depending on context (e.g. <form>; <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;
@@ -55,19 +57,8 @@
 :focus-visible {
   outline: none;
 }
-/* NOTE: move to higher priority layer instead of using !important?; add CSS
+
- * @layer requirements in README */
+/* [hidden] submit elements cannot have `display` set as it makes them visible. */
-[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;
 }
@@ -78,13 +69,10 @@
  *  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;
@@ -102,14 +90,14 @@ textarea {
   border-radius: 0.25em;
   padding: 0.2em 0.4em;
 }
-svg {
+[name=cancel],
-  height: 1.4em;
+.auxiliary {
-  margin: 0 0.2em 0 0;
+  border-color: var(--color-border-gray);
-  width: 1.4em;
+  color: var(--color-nav-gray);
-}
+  fill: var(--color-nav-gray);
-svg:last-child {
-  margin-right: 0;
 }
+input[type=checkbox],
+svg,
 textarea {
   margin: 0;
 }
@@ -127,12 +115,11 @@ input[type=checkbox]:checked {
   appearance: checkbox;
   -webkit-appearance: checkbox;
 }
-/* Hide spin buttons of <input type=number>. */
+/* Hide spin buttons in input number fields */
-/* TODO: add spin buttons inside <input type=number>: before (-) and after (+) input. */
+/* TODO: add spin buttons inside input[number]: before (-) and after (+) input */
 input[type=number] {
   appearance: textfield;
   -moz-appearance: textfield;
-  text-align: end;
 }
 input::-webkit-inner-spin-button {
   -webkit-appearance: none;
@@ -141,30 +128,6 @@ 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,
@@ -173,7 +136,6 @@ summary:focus-visible,
 textarea:focus-visible {
   accent-color: var(--color-dark-blue);
   background-color: var(--color-focus-gray);
-  color: black;
 }
 input:hover,
 select:hover,
@@ -184,15 +146,8 @@ 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 {
@@ -226,17 +181,21 @@ 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 {
@@ -252,19 +211,13 @@ textarea:invalid {
   background-color: var(--color-red);
   border-color: var(--color-red);
 }
-.link:focus-visible {
+/* TODO: move normal, non-button links (<a>:hover/:focus) styling here (i.e.
-  text-decoration-color: var(--color-gray);
+ * page-wide, top-level) and remove from `table.items` - as the style should be
-}
+ * same everywhere. */
-.link:hover {
+input[type=text]:read-only,
-  color: var(--color-blue);
+textarea:read-only {
-  text-decoration-color: var(--color-blue);
+  border: none;
-}
+  padding-inline: 0;
-table .button {
-  border-color: var(--color-border-gray);
-  color: var(--color-table-gray);
-  font-weight: normal;
-  height: 100%;
-  padding: 0.4em;
 }
 
 
@@ -277,16 +230,16 @@ 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:has(> .topside-area) {
+body:not(:has(.topside-area)) {
   grid-template-areas:
     "header    header  header"
     "nav       nav     nav"
-    "leftside  topside rightside"
     "leftside  main    rightside";
 }
 
@@ -393,6 +346,7 @@ header {
 }
 
 
+/* TODO: Hover over invalid should work like in measurements (thin vs thick border) */
 .labeled-form {
   align-items: center;
   display: grid;
@@ -429,79 +383,85 @@ 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. */
-.items-table {
+table.items {
   border-spacing: 0;
   border: 1px solid var(--color-border-gray);
   border-radius: 0.25em;
   font-size: 0.85rem;
   text-align: left;
 }
-.items-table thead {
+table:not(:has(tr)) {
+  display: none;
+}
+table.items thead {
   font-size: 0.8rem;
 }
-.items-table thead,
+table.items thead,
-.items-table tbody tr:hover {
+table.items tbody tr:hover {
   background-color: var(--color-focus-gray);
 }
-.items-table th {
+table.items th {
-  padding: 0.75em 0 0.75em 1em;
+  padding-block: 0.75em;
   text-align: center;
 }
-.items-table th:last-child {
+table.items th,
-  padding-inline-end: 0.4em;
+table.items td {
+  padding-inline: 1em 0;
 }
-.items-table td {
+/* For <a> to fill <td> completely, we use an `::after` pseudoelement. */
-  border-top: 1px solid var(--color-border-gray);
+table.items td.link {
-  height: 2.4em;
+  padding: 0;
-  padding: 0.1em 0 0.1em calc(1em + var(--depth) * 0.8em);
-}
-.items-table td:last-child {
-  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 {
+table.items td.link a {
+  color: inherit;
+  font: inherit;
+}
+table.items td.link a::after {
   content: '';
-  inset: -1px 0 0 0;
+  inset: 0;
   position: absolute;
 }
-.items-table .flex {
+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 {
+  padding-inline-end: 0.1em;
+}
+table.items td {
+  border-top: 1px solid var(--color-border-gray);
+  height: 2.4em;
+  padding-block: 0.1em;
+}
+table.items .actions {
+  display: flex;
   gap: 0.4em;
   justify-content: end;
 }
-.items-table .dropzone {
+table.items .actions.centered {
+  justify-content: center;
+}
+table.items tr.dropzone {
   position: relative;
 }
-.items-table .dropzone::after {
+table.items tr.dropzone::after {
   content: '';
   inset: 1px 0 0 0;
   position: absolute;
@@ -509,57 +469,123 @@ header {
   outline-offset: -1px;
   z-index: var(--z-index-table-row-outline);
 }
-.items-table .handle {
+table.items td.handle {
-  cursor: grab;
+  cursor: move;
 }
-.items-table .form td {
+table.items tr.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-gray);
+  fill: var(--color-table-gray);
 }
-.items-table td:has(> svg:only-child) {
+table.items svg {
+  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);
+}
 
 
-.center {
+form table.items {
+  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%;
 }
-.flex {
+.hflex {
   display: flex;
   gap: 0.8em;
 }
-.flex.reverse {
+.hflex.centered {
-  flex-direction: row-reverse;
+  justify-content: center;
 }
-.flex.vertical {
+.vexpand {
+  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 {
@@ -570,12 +596,12 @@ summary {
   align-items: center;
   color: var(--color-gray);
   display: flex;
-  gap: 0.4em;
+  gap: 0.2em;
   height: 100%;
   white-space: nowrap;
 }
 summary::before {
-  background-color: currentColor;
+  background-color: #000;
   content: "";
   height: 1em;
   mask-image: url('pictograms/chevron-down.svg');
@@ -598,14 +624,14 @@ summary span {
   width: 100%;
 }
 details[open] summary::before {
-  transform: scaleY(-1);
+  transform: rotate(180deg);
 }
 summary::marker {
   padding-left: 0.25em;
 }
 /* NOTE: use `details[open]::details-content` once widely available. */
 details[open] ul {
-  background-color: white;
+  background: white;
   border: 1px solid var(--color-border-gray);
   border-radius: 0.25em;
   box-shadow: 1px 1px 3px var(--color-border-gray);
@@ -635,8 +661,3 @@ 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

@@ -9,6 +9,7 @@ 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
@@ -55,6 +56,16 @@ 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

@@ -1,7 +1,13 @@
 class MeasurementsController < ApplicationController
+  before_action except: :index do
+    raise AccessForbidden unless current_user.at_least(:active)
+  end
+
   def index
-    @measurements = []
+    readouts = current_user.readouts.includes(:quantity, :unit).order(created_at: :desc)
-    #@measurements = current_user.units.ordered.includes(:base, :subunits)
+    @measurements = readouts.group_by(&:created_at).map do |created_at, grouped|
+      Measurement.new(created_at: created_at, readouts: grouped)
+    end
   end
 
   def new
@@ -9,8 +15,33 @@ 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

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

@@ -0,0 +1,59 @@
+# 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

@@ -1,11 +1,24 @@
 class User::ProfilesController < Devise::RegistrationsController
   def destroy
-    # TODO: Disallow/disable deletion for last admin account; update :edit view
+    if current_user.sole_admin?
+      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

@@ -102,17 +102,13 @@ module ApplicationHelper
 
     def number_field(method, options = {})
       attr_type = object.type_for_attribute(method)
-      case attr_type.type
+      if attr_type.type == :decimal
-      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
@@ -152,8 +148,7 @@ module ApplicationHelper
   end
 
   def tabular_form_with(**options, &block)
-    extra_options = {builder: TabularFormBuilder, class: 'tabular-form',
+    extra_options = {builder: TabularFormBuilder, html: {autocomplete: 'off'}}
-                     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(quantities)
+  def quantities_check_boxes
     # 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

@@ -1,3 +1,17 @@
 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}
+    length: {maximum: type_for_attribute(:name).limit || Float::INFINITY}
-  validates :description, length: {maximum: type_for_attribute(:description).limit}
+  validates :description, length: {maximum: type_for_attribute(:description).limit || Float::INFINITY}
 
   # Update :depths of progenies after parent change
   before_save if: :parent_changed? do
@@ -61,18 +61,26 @@ class Quantity < ApplicationRecord
 
   # Return: ordered [sub]hierarchy
   scope :ordered, ->(root: nil, include_root: true) {
-    numbered = Arel::Table.new('numbered')
+    if connection.adapter_name =~ /mysql/i
-
+      numbered = Arel::Table.new('numbered')
-    self.model.with(numbered: numbered(:parent_id, :name)).with_recursive(arel_table.name => [
+      self.model.with(numbered: numbered(:parent_id, :name)).with_recursive(arel_table.name => [
-      numbered.project(
+        numbered.project(
-        numbered[Arel.star],
+          numbered[Arel.star],
-        numbered.cast(numbered[:child_number], 'BINARY').as('path')
+          numbered.cast(numbered[:child_number], 'BINARY').as('path')
-      ).where(numbered[root && include_root ? :id : :parent_id].eq(root)),
+        ).where(numbered[root && include_root ? :id : :parent_id].eq(root)),
-      numbered.project(
+        numbered.project(
-        numbered[Arel.star],
+          numbered[Arel.star],
-        arel_table[:path].concat(numbered[:child_number])
+          arel_table[:path].concat(numbered[:child_number])
-      ).join(arel_table).on(numbered[:parent_id].eq(arel_table[:id]))
+        ).join(arel_table).on(numbered[:parent_id].eq(arel_table[:id]))
-    ]).order(arel_table[:path])
+      ]).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

@@ -0,0 +1,20 @@
+# 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}
+    length: {maximum: type_for_attribute(:symbol).limit || Float::INFINITY}
-  validates :description, length: {maximum: type_for_attribute(:description).limit}
+  validates :description, length: {maximum: type_for_attribute(:description).limit || Float::INFINITY}
   validates :multiplier, numericality: {equal_to: 1}, unless: :base
   validates :multiplier, numericality: {greater_than: 0, precision: true, scale: true}, if: :base
 
@@ -26,10 +26,8 @@ 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: [
-      Unit.with(units: self.or(Unit.defaults)).left_joins(:base)
+      self.or(Unit.defaults).left_joins(:base)
         .where.not(
           # Exclude Units that are/have default counterpart
           Arel::SelectManager.new.project(1).from(other_units)
@@ -65,8 +63,14 @@ 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.
-      arel_table.join(actionable_units).on(actionable_units[:base_id].eq(arel_table[:id]))
+      # Use ActiveRecord::Relation (not a raw SelectManager) so the SQLite Arel
-        .project(arel_table[Arel.star], Arel::Nodes.build_quoted(nil).as('portable'))
+      # visitor does not wrap it in parentheses inside the UNION ALL CTE body.
+      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()
@@ -74,7 +78,7 @@ class Unit < ApplicationRecord
         Arel::Nodes.build_quoted(1).as('multiplier'), # disregard multiplier when sorting
         units[:portable].minimum.as('portable')
       )
-      .from(units).group(:base_id, :symbol)
+      .from(units).group(units[:base_id], units[:symbol])
   }
   scope :ordered, ->{
     left_outer_joins(:base).order(ordering)
@@ -83,8 +87,8 @@ 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),
-     :multiplier,
+     arel_table[:multiplier],
-     :symbol]
+     arel_table[:symbol]]
   end
 
   before_destroy do

app/models/user.rb

@@ -29,4 +29,11 @@ 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="flex">
+    <td class="actions">
       <% 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">
+<table class="main-area items">
   <thead>
     <tr>
       <th><%= Unit.human_attribute_name(:symbol) %></th>

app/views/layouts/application.html.erb

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

app/views/measurements/_form.html.erb

@@ -1,37 +1,23 @@
-<%= tabular_form_with model: Measurement.new, id: :measurement_form,
+<%= tabular_form_with model: Measurement.new do |form| %>
-  class: 'topside-area flex vertical center',
+  <fieldset>
-  html: {onkeydown: 'formProcessKey(event)'} do |form| %>
+    <table class="items centered">
-
+      <tbody id="readouts">
-  <table class="items-table center">
+        <tr id="readouts_form">
-    <tbody id="readouts">
+          <td colspan="4">
-      <%= tabular_fields_for @measurement do |form| %>
+            <%= collection_select :quantity, :id, @quantities, :id, :to_s_with_depth,
-        <tr class="italic">
+              {prompt: t('.select_quantity'), disabled: '', selected: ''},
-          <td class="hexpand hmin50"><%= t '.taken_at_html' %></td>
+              {name: :id, class: 'quantity vexpand',
-          <td colspan="3" class="ralign">
+               onchange: "this.form.requestSubmit(new_readout_submit);"} %>
-            <%= form.datetime_field :taken_at, required: true %>
+            <%= 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>
-    </tbody>
+    </table>
-  </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

@@ -1,3 +1,4 @@
+<%= 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

@@ -0,0 +1,14 @@
+<%= 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

@@ -0,0 +1,5 @@
+<%= 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

@@ -0,0 +1,3 @@
+<%= 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-area buttongrid">
+<div class="rightside 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();',
@@ -7,7 +7,9 @@
   <% end %>
 </div>
 
-<table class="main-area">
+<%= tag.div class: 'topside', id: :measurement_form %>
+
+<table class="main">
   <tbody id="measurements">
     <%= render(@measurements) || render_no_items %>
   </tbody>

app/views/measurements/new.turbo_stream.erb

@@ -1,5 +1,4 @@
 <%= turbo_stream.disable :new_measurement_link -%>
-<%= turbo_stream.hide :no_items -%>
+<%= turbo_stream.update :measurement_form do %>
-<%= 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="flex">
+    <td class="actions">
       <%= 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 style="--depth:<%= quantity.depth %>">
+  <td class="link" style="--depth:<%= quantity.depth %>">
-    <%= link_to quantity, edit_quantity_path(quantity), class: 'link',
+    <%= link_to quantity, edit_quantity_path(quantity), onclick: 'this.blur();',
-      onclick: 'this.blur();', data: {turbo_stream: true} %>
+      data: {turbo_stream: true} %>
   </td>
   <td><%= quantity.description %></td>
 
   <% if current_user.at_least(:active) %>
-    <td class="flex">
+    <td class="actions">
       <%= 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

@@ -8,14 +8,13 @@
     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">
+<table class="main-area items">
   <thead>
     <tr>
       <th><%= Quantity.human_attribute_name(:name) %></th>
-      <th class="hexpand"><%= Quantity.human_attribute_name(:description) %></th>
+      <th><%= Quantity.human_attribute_name(:description) %></th>
       <% if current_user.at_least(:active) %>
         <th><%= t :actions %></th>
         <th></th>

app/views/readouts/_form.html.erb

@@ -1,22 +1,20 @@
 <%# TODO: add readout reordering by dragging %>
 <%= tabular_fields_for 'readouts[]', readout do |form| %>
-  <%- tag.tr id: dom_id(readout.quantity, :new, :readout) do %>
+  <%- tag.tr id: dom_id(readout.quantity, :new, :readout),
+             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 %>
-    </td>
-    <td>
-      <%= 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) },
+        ->(u){ sanitize('&emsp;' * (u.base_id ? 1 : 0) + u.symbol) } %>
-        {prompt: '', disabled: '', selected: ''}, required: true %>
     </td>
-    <td class="flex">
+    <td class="actions">
-      <%# TODO: change to _link_ after giving up displaying relative paths %>
+      <%= image_button_tag '', 'delete-outline', class: 'dangerous', name: :discard,
-      <%= 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

@@ -1,8 +1,9 @@
-<% @readouts.each do |r| %>
-  <%= turbo_stream.disable dom_id(r.quantity) %>
-<% end %>
 <%= render partial: 'form_repath' %>
-<%= turbo_stream.append :readouts do %>
+<%# 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}']" %>
+<% end %>
+<%= turbo_stream.before :readouts_form 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

@@ -0,0 +1,39 @@
+<%= 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>
+    <td class="number">
       <%= form.number_field :multiplier, required: true, size: 10, min: :step if @unit.base_id? %>
     </td>
 
-    <td class="flex">
+    <td class="actions">
       <%= 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

@@ -6,15 +6,14 @@
                   drop_id: dom_id(unit.base || unit),
                   drop_id_param: "unit[base_id]"} do %>
 
-  <td style="--depth:<%= unit.base_id? ? 1 : 0 %>">
+  <td class="link" style="--depth:<%= unit.base_id? ? 1 : 0 %>">
-    <%= link_to unit, edit_unit_path(unit), class: 'link', onclick: 'this.blur();',
+    <%= link_to unit, edit_unit_path(unit), onclick: 'this.blur();', data: {turbo_stream: true} %>
-      data: {turbo_stream: true} %>
   </td>
   <td><%= unit.description %></td>
-  <td class="ralign"><%= unit.multiplier.to_html %></td>
+  <td class="number"><%= unit.multiplier.to_html %></td>
 
   <% if current_user.at_least(:active) %>
-    <td class="flex">
+    <td class="actions">
       <% 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

@@ -7,14 +7,13 @@
     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">
+<table class="main-area items">
   <thead>
     <tr>
       <th><%= Unit.human_attribute_name(:symbol) %></th>
-      <th class="hexpand"><%= Unit.human_attribute_name(:description) %></th>
+      <th><%= 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-table" id="users">
+<table class="main-area items" id="users">
   <thead>
     <tr>
       <th><%= User.human_attribute_name(:email) %></th>
@@ -11,7 +11,7 @@
   <tbody>
     <% @users.each do |user| %>
       <tr>
-        <td><%= link_to user, user_path(user), class: 'link' %></td>
+        <td class="link"><%= link_to user, user_path(user) %></td>
         <td>
           <% if user == current_user %>
             <%= user.status %>
@@ -22,11 +22,11 @@
             <% end %>
           <% end %>
         </td>
-        <td>
+        <td class="svg">
           <%= svg_tag 'pictograms/checkbox-marked-outline' if user.confirmed_at.present? %>
         </td>
         <td><%= l user.created_at, format: :without_tz %></td>
-        <td class="flex">
+        <td class="actions">
           <% if allow_disguise?(user) %>
             <%= image_link_to t('.disguise'), 'incognito', disguise_user_path(user) %>
           <% end %>

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

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

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

@@ -10,6 +10,7 @@
 
   <%= 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="flex">
+  <div class="actions">
     <%= f.submit "Resend unlock instructions" %>
   </div>
 <% end %>

config/application.rb.dist

@@ -20,10 +20,6 @@ Bundler.require(*Rails.groups)
 
 module FixinMe
   class Application < Rails::Application
-    # Allow RAILS_DATABASE_YML to override the database config file path.
-    # Used by the multi-database test runner (lib/tasks/test_databases.rake).
-    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
 
@@ -58,5 +54,9 @@ 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 @@
-3nm9KZNtyLhPgZBVzOOkN2FXHD0uEMuzgb5Sl1MrAMmi6+iEFSzyTHfZFW2mz18VyNz5DDYvTODZqBDQKK+FQh70uEQkmGqaY5XsTOzUFzk56quaPNtZvFEGux1nX2avSbYQBs3HeyYyWyTAFhez5j8tVb6sZD2xZ8twa9KAB42j86NIHT9w/ZMFqZbGbdBoR1Mrqoy9/IWv2QgxMTpGR6JBpTUwauXm6wS/bTt8SCXF57JSVgvdw/BxFzoA3Xj6N5E89LbMfh54W2ruMhybka5E7zXN9z0v4oXt8GiYZFIODEYZwqzEVaUK1WXS5qb5OrDJFAzs29Uf/gDrIDx71Lot+jejCS+xFfI9454EnHcVH66wKuwF6ylKupJDffM0hQHplcEfVSq5UiDfbPXm46Vr0g1A--2RrmuzCBuHvYpPNA--ugbuRe7ivfDqeUCt6ahciA==
+OOGMGhfQuV67kqlMecZLcNfgrGS81KPAGmY27GnohtcGSPtiaqL8OZYsVf5IIOaI1K14ZEflln+E2deaIJ5apaq98f+1gJawGbAJeEfLCskJV/03nT8ICpRk+bxT/lzqeCIaUJOLk4708ufC9EpdpJD/jgVSAuI/iNMzzwMbNFvqNmx0Kmgp0mRpHSDGLZZkaP3GW7wdsJEVsNpSPIrkkGL1BvD+nHbmHjuGkn4MMsmm1Yz0M31jkJiDksT0SVeOcxWvOApclxm6VZOAws2l6YKEs/XoE7ye3ssjxdjdwjMzRXV7dwYclNBQGRoERVTozdYiFR4eAGMdlG0RsnUAp+edILH5nvHCIPb3la/dUTOzAQMNY0TqMMVUHGqGuVS/EMCX/w7zrmYN5C+2W8SfugrvTpAL--dUdvsDfbUdVrbmmo--fUwsWUp+DQGPtEF+Zq4ZTw==

config/database.yml.dist

@@ -48,24 +48,3 @@ production:
 #test:
 #  <<: *default
 #  database: fixinme_test
-
-# Multi-database testing
-# ----------------------
-# Any key starting with "test" is treated as a test database.
-# When more than one is present, EVERY test task (rails test, rails test:models,
-# rails test:system, …) automatically runs against all of them.
-#
-# The adapter gem must be available:
-#   bundle config --local with "mysql sqlite"   # mysql + sqlite
-#   bundle config --local with "mysql pg"       # mysql + postgresql
-#
-#test_sqlite:
-#  adapter: sqlite3
-#  database: db/fixinme_test.sqlite3
-#
-#test_pg:
-#  adapter: postgresql
-#  database: fixinme_test
-#  username: fixinme
-#  password: Some-password1%
-#  host: localhost

config/environments/test.rb

@@ -58,4 +58,7 @@ 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

@@ -85,10 +85,19 @@ en:
     navigation: Measurements
     no_items: There are no measurements taken. You can Add some now.
     form:
-      select_quantity: select quantities...
+      select_quantity: select the measured quantity...
-      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.
@@ -160,7 +169,27 @@ 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

@@ -1,6 +1,10 @@
 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

@@ -1,14 +1,10 @@
 class CreateReadouts < ActiveRecord::Migration[7.2]
   def change
     create_table :readouts do |t|
-      # Reference :user through :quantity (:measurement may be NULL).
+      t.references :user, null: false, foreign_key: true
-      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
-      # Move to Measurement?
+      t.decimal :value, null: false, precision: 30, scale: 15
       #t.references :collector, foreign_key: true
       #t.references :device, foreign_key: true
 

db/migrate/20260228171524_create_settings.rb

@@ -0,0 +1,12 @@
+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

@@ -3,6 +3,17 @@
 #   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

@@ -1,158 +0,0 @@
-require 'yaml'
-require 'erb'
-require 'tmpdir'
-
-# Multi-database test runner
-# ==========================
-# When database.yml contains more than one `test*` configuration, every
-# standard test task (test, test:models, test:system, …) is automatically
-# rewritten to run the full suite against EACH configured database in turn.
-#
-# Convention — any top-level key that starts with "test" and holds a Hash:
-#
-#   test:           ← required primary database
-#     adapter: mysql2
-#     database: fixinme_test
-#     ...
-#
-#   test_sqlite:    ← optional additional databases
-#     adapter: sqlite3
-#     database: db/fixinme_test.sqlite3
-#
-#   test_pg:
-#     adapter: postgresql
-#     ...
-#
-# A single-database setup is unchanged: every task behaves exactly as before.
-#
-# The mechanism uses RAILS_DATABASE_YML — an env var read by
-# config/application.rb(.dist) to override Rails' database config path before
-# initialisation, giving each subprocess a clean, isolated database config.
-
-module MultiDbTests
-  ADAPTER_GEMS = {
-    'mysql2'      => 'mysql2',
-    'sqlite3'     => 'sqlite3',
-    'postgresql'  => 'pg',
-    'pg'          => 'pg',
-  }.freeze
-
-  ADAPTER_BUNDLE_GROUPS = {
-    'mysql2'      => 'mysql',
-    'sqlite3'     => 'sqlite',
-    'postgresql'  => 'postgresql',
-    'pg'          => 'postgresql',
-  }.freeze
-
-  # Rake task names generated by railties/lib/rails/test_unit/testing.rake
-  # that use run_from_rake — these are the ones we rewrite.
-  WRAPPED_TASKS = (
-    ['test'] +
-    Rails::TestUnit::Runner::TEST_FOLDERS.map { |f| "test:#{f}" } +
-    %w[test:all test:system test:generators test:units test:functionals]
-  ).freeze
-
-  class << self
-    # Returns {name => config_hash} for every key starting with "test".
-    def test_configs
-      @test_configs ||= begin
-        db_file = Rails.root.join('config', 'database.yml')
-        all     = YAML.safe_load(ERB.new(db_file.read).result, aliases: true) || {}
-        all.select { |k, v| k.to_s.start_with?('test') && v.is_a?(Hash) }
-      end
-    end
-
-    def non_test_configs
-      @non_test_configs ||= begin
-        db_file = Rails.root.join('config', 'database.yml')
-        all     = YAML.safe_load(ERB.new(db_file.read).result, aliases: true) || {}
-        all.reject { |k, _| k.to_s.start_with?('test') }
-      end
-    end
-
-    # Run rails +task_name+ for every configured test database.
-    # Called from the rewritten rake task actions.
-    def run(task_name)
-      cfgs    = test_configs
-      results = {}
-
-      cfgs.each do |db_name, config|
-        adapter = config['adapter'].to_s
-        puts "\n#{'─' * 64}"
-        puts "  #{task_name}  ·  #{db_name}  (#{adapter})"
-        puts '─' * 64
-
-        unless adapter_available?(adapter)
-          warn "  SKIPPED — '#{adapter}' gem not in bundle.\n" \
-               "  Run: bundle config --local with \"#{current_with} #{adapter_group(adapter)}\""
-          results[db_name] = :skipped
-          next
-        end
-
-        Dir.mktmpdir('rails_test_') do |tmpdir|
-          tmp_yml = File.join(tmpdir, 'database.yml')
-          File.write(tmp_yml, non_test_configs.merge('test' => config).to_yaml)
-          env = { 'RAILS_DATABASE_YML' => tmp_yml }
-
-          if system(env, 'bundle exec rails db:test:prepare')
-            results[db_name] = system(env, 'rails', task_name) ? :pass : :fail
-          else
-            results[db_name] = :prepare_failed
-          end
-        end
-      end
-
-      print_summary(cfgs, results)
-
-      failed = results.count { |_, s| [:fail, :prepare_failed].include?(s) }
-      exit(false) if failed > 0
-    end
-
-    private
-
-    def adapter_available?(adapter)
-      require ADAPTER_GEMS.fetch(adapter, adapter)
-      true
-    rescue LoadError
-      false
-    end
-
-    def adapter_group(adapter)
-      ADAPTER_BUNDLE_GROUPS.fetch(adapter, adapter)
-    end
-
-    def current_with
-      (Bundler.settings[:with] || '').split(':').join(' ')
-    end
-
-    def print_summary(cfgs, results)
-      return if results.size <= 1  # no summary for single-DB runs
-
-      puts "\n#{'═' * 64}"
-      puts '  SUMMARY'
-      puts '═' * 64
-      results.each do |db_name, status|
-        adapter = cfgs.dig(db_name, 'adapter') || '?'
-        icon    = status == :pass ? '✓' : (status == :skipped ? '–' : '✗')
-        label   = { pass: 'PASS', fail: 'FAIL',
-                    prepare_failed: 'PREPARE FAILED', skipped: 'SKIPPED' }[status]
-        puts "  #{icon}  #{db_name.ljust(26)} (#{adapter.ljust(12)})  #{label}"
-      end
-      puts '═' * 64
-    end
-  end
-end
-
-# Rewrite every standard test task to run against all configured databases.
-# This file loads after railties/testing.rake, so all tasks already exist.
-# Single-database setups are completely unaffected.
-if MultiDbTests.test_configs.size > 1
-  MultiDbTests::WRAPPED_TASKS.each do |task_name|
-    next unless Rake::Task.task_defined?(task_name)
-
-    Rake::Task[task_name].clear_actions
-    Rake::Task[task_name].enhance do
-      MultiDbTests.run(task_name)
-    end
-  end
-end

lib/tasks/test_multi_db.rake

@@ -0,0 +1,50 @@
+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

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

test/controllers/registrations_controller_test.rb

@@ -0,0 +1,18 @@
+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

@@ -2,7 +2,9 @@ require "test_helper"
 
 class UsersControllerTest < ActionDispatch::IntegrationTest
   setup do
-    @user = users(:one)
+    @admin = users(:admin)
+    @user = users(:alice)
+    sign_in @admin
   end
 
   test "should get index" do
@@ -10,39 +12,25 @@ 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: { email: @user.email, status: @user.status } }
+    patch user_url(@user), params: { user: { status: :restricted } }, as: :turbo_stream
-    assert_redirected_to user_url(@user)
+    assert_equal "restricted", @user.reload.status
   end
 
-  test "should destroy user" do
+  test "should not update self" do
-    assert_difference("User.count", -1) do
+    patch user_url(@admin), params: { user: { status: :active } }, as: :turbo_stream,
-      delete user_url(@user)
+      headers: { "HTTP_REFERER" => users_url }
-    end
+    assert_response :redirect
+  end
 
-    assert_redirected_to users_url
+  test "should forbid non-admin" do
+    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 = sign_in user: users.reject(&:admin?).select(&:confirmed?).sample
     # TODO: remove condition after root_url changed to different path than
     # profile in routes.rb
     unless has_current_path?(edit_user_registration_path)
@@ -196,6 +196,14 @@ 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

@@ -2,6 +2,10 @@ 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)