Fix seed admin password too short for Devise validation

Generate a random 12-character alphanumeric password instead of the
hardcoded 'admin' (5 chars) which fails Devise's minimum length
requirement of 8 characters. The generated password is printed to
stdout so the operator knows what to use.

Fixes #71

CLAUDE.md

@@ -1,84 +0,0 @@
-# CLAUDE.md
-
-This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
-
-## Project Overview
-
-Fixin.me is a "quantified self" Rails 7.2.3 application for personal data tracking. Users define hierarchical **quantities** (metrics to track), **units** (with optional conversion hierarchies), and **readouts** (individual measurements). There is also a non-persistent **measurement** model used as a form wrapper.
-
-## Setup
-
-Configuration files are distributed as `.dist` templates — copy and customize before use:
-
-```bash
-cp config/application.rb.dist config/application.rb
-cp config/database.yml.dist config/database.yml
-cp config/puma.rb.dist config/puma.rb
-```
-
-```bash
-bundle config --local frozen true
-bundle config --local path .gem
-bundle config --local with mysql development test   # or: pg, sqlite
-bundle install
-RAILS_ENV=development bundle exec rails db:create db:migrate db:seed
-```
-
-## Common Commands
-
-```bash
-bundle exec rails s                                          # start server
-bundle exec rails test                                       # all unit/model/controller tests
-bundle exec rails test:system                                # all system tests (Capybara + Selenium)
-bundle exec rails test test/system/units_test.rb            # single test file
-bundle exec rails test --seed 64690 --name test_add_unit    # single test by name
-bundle exec rails db:seed:export                             # export default settings as seed file
-```
-
-## Architecture
-
-### Data Model
-
-- **Quantity** — hierarchical tree (self-referential `parent_id`). Cached `depth` and `pathname` fields are recomputed via recursive CTEs on write. Direct assignment to cached fields is blocked.
-- **Unit** — optional hierarchy via `base_id` and `multiplier` for unit conversion. Multiplier precision/scale is validated by a custom validator.
-- **Readout** — single measurement: `value` (IEEE 754 float), `quantity`, `unit`, `category`.
-- **Measurement** — `ActiveModel::Model` form wrapper (not database-backed); bridges the readout creation form.
-- **User** — Devise-managed with a status enum: `admin`, `active`, `restricted`, `locked`, `disabled`. Admins can disguise as other users.
-
-### Hierarchical Queries
-
-Both `Quantity` and `Unit` use recursive CTEs for tree traversal (ordered traversal, ancestors, progenies, common ancestors). `lib/core_ext/arel/` patches Arel to support CTE with `UPDATE`/`DELETE` statements, working around Rails issue #54658.
-
-### Custom Extensions (`lib/core_ext/`)
-
-- **arel/** — CTE support for UPDATE/DELETE
-- **active_model/** — precision/scale validator used by `Unit#multiplier`
-- **active_record/** — `attr_cached` mechanism (see `ApplicationRecord`)
-- **action_view/** — record identifier suffixes
-- Miscellaneous: `Array#delete_bang`, `BigDecimal` scientific notation
-
-### Response Handling
-
-Controllers respond to both HTML and Turbo Stream formats. Errors during Turbo Stream requests trigger a redirect with flash rather than rendering inline, handled in `ApplicationController`.
-
-### Numeric Precision
-
-Readout values are stored as IEEE 754 double-precision floats (not fixed-point decimals). Rationale in `DESIGN.md`: biological values span many orders of magnitude; 15-digit float precision is sufficient and avoids conversion overhead.
-
-### Routes
-
-```
-measurements   GET/POST /measurements
-readouts       GET/POST /readouts, DELETE /readouts/:id/discard
-quantities     CRUD + POST /quantities/:id/reparent
-units          CRUD + POST /units/:id/rebase
-users          CRUD + POST /users/:id/disguise, POST /users/revert
-default/       namespace for default units import/export and admin panel
-root           → /units (authenticated), /sign_in (unauthenticated)
-```
-
-## Database Requirements
-
-The database must support:
-- Recursive CTEs with `UPDATE`/`DELETE` (MySQL ≥ 8.0, PostgreSQL, or SQLite3)
-- Decimal precision of 30+ digits

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/images/pictograms/alert-outline.svg

@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" id="icon" viewBox="0 0 24 24"><path d="M12,2L1,21H23M12,6L19.53,19H4.47M11,10V14H13V10M11,16V18H13V16" /></svg>
+<svg xmlns="http://www.w3.org/2000/svg" id="icon" viewBox="0 0 24 24"><path fill="#ffffff" d="M12,2L1,21H23M12,6L19.53,19H4.47M11,10V14H13V10M11,16V18H13V16" /></svg>

app/assets/images/pictograms/check-circle-outline.svg

@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" id="icon" viewBox="0 0 24 24"><path d="M12 2C6.5 2 2 6.5 2 12S6.5 22 12 22 22 17.5 22 12 17.5 2 12 2M12 20C7.59 20 4 16.41 4 12S7.59 4 12 4 20 7.59 20 12 16.41 20 12 20M16.59 7.58L10 14.17L7.41 11.59L6 13L10 17L18 9L16.59 7.58Z" /></svg>
+<svg xmlns="http://www.w3.org/2000/svg" id="icon" viewBox="0 0 24 24"><path fill="#ffffff" d="M12 2C6.5 2 2 6.5 2 12S6.5 22 12 22 22 17.5 22 12 17.5 2 12 2M12 20C7.59 20 4 16.41 4 12S7.59 4 12 4 20 7.59 20 12 16.41 20 12 20M16.59 7.58L10 14.17L7.41 11.59L6 13L10 17L18 9L16.59 7.58Z" /></svg>

app/assets/stylesheets/application.css

@@ -18,12 +18,10 @@
 /* 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)
- * * 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,
+ * NOTE: Style in a modular way, similar to how CSS @scope would be used,
- * to make transition easier once @scope is widely available. */
+ * to make transition easier once @scope is widely available */
 :root {
   --color-focus-gray: #f3f3f3;
   --color-border-gray: #dddddd;
@@ -55,36 +53,17 @@
 :focus-visible {
   outline: none;
 }
-/* NOTE: move to higher priority layer instead of using !important?; add CSS
- * @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;
-}
 
 
 /* Color coding of input controls' background:
- *  blue - target for interaction with pointer,
+ *  blue - target for interaction with pointer
- *  gray - target for interaction with keyboard,
+ *  gray - target for interaction with keyboard
- *  red - destructive, non-undoable action.
+ *  red - destructive, non-undoable action
  */
-/* TODO: merge selectors using :is() */
-a,
 button,
 details,
 input,
 select,
-summary,
 textarea {
   background-color: inherit;
   font: inherit;
@@ -94,24 +73,50 @@ input,
 select {
   text-align: inherit;
 }
+a,
+button,
+input[type=submit] {
+  cursor: pointer;
+  text-decoration: none;
+  white-space: nowrap;
+}
+/* [hidden] submit controls cannot have `display` set as it makes them visible */
+.button,
+button:not([hidden]),
+input[type=submit]:not([hidden]),
+.tab {
+  align-items: center;
+  color: var(--color-gray);
+  display: flex;
+  fill: var(--color-gray);
+  font-weight: bold;
+}
+.button,
+button,
+input[type=submit] {
+  font-size: 0.8rem;
+  padding: 0.6em 0.5em;
+  width: fit-content;
+}
+input:not([type=submit]):not([type=checkbox]),
+select,
+summary,
+textarea {
+  padding: 0.2em 0.4em;
+}
+.button,
+button,
 input,
 select,
 summary,
 textarea {
-  border: 1px solid var(--color-gray);
+  border: solid 1px var(--color-gray);
   border-radius: 0.25em;
-  padding: 0.2em 0.4em;
-}
-svg {
-  height: 1.4em;
-  margin: 0 0.2em 0 0;
-  width: 1.4em;
-}
-svg:last-child {
-  margin-right: 0;
 }
+input[type=checkbox],
+svg,
 textarea {
-  margin: 0;
+  margin: 0
 }
 input[type=checkbox] {
   accent-color: var(--color-blue);
@@ -119,20 +124,16 @@ input[type=checkbox] {
   -webkit-appearance: none;
   display: flex;
   height: 1.1em;
-  margin: 0;
-  padding: 0;
   width: 1.1em;
 }
 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. */
 input[type=number] {
   appearance: textfield;
   -moz-appearance: textfield;
-  text-align: end;
 }
 input::-webkit-inner-spin-button {
   -webkit-appearance: none;
@@ -141,108 +142,37 @@ input::-webkit-outer-spin-button {
   -webkit-appearance: none;
   margin: 0;
 }
-/* Text color of table form controls:
+.button > svg,
- *  - black for row/table forms,
+.tab > svg,
- *  - inherited for internal (column specific) buttons/forms. */
+button > svg {
-table input,
+  height: 1.4em;
-table select,
+  width: 1.4em;
-table summary,
-table textarea {
-  border-color: var(--color-border-gray);
 }
-table input,
+.button > svg:not(:last-child),
-table select,
+.tab > svg:not(:last-child),
-table textarea {
+button > svg:not(:last-child) {
-  padding-block: 0.375em;
+  margin-right: 0.2em;
 }
-table form input,
+/* TODO: move normal non-button links (<a>:hover/:focus) styling here (i.e.
-table form select,
+ * page-wide, top-level) and remove from table.items - as the style should be
-table form summary,
+ * same everywhere */
-table form textarea {
+.button:focus-visible,
-  color: inherit;
+button:focus-visible,
-}
+input[type=submit]:focus-visible {
-table svg:not(:only-child) {
+  background-color: var(--color-focus-gray);
-  height: 1.25em;
-  width: 1.25em;
 }
 input:focus-visible,
 select:focus-visible,
 select:focus-within,
-/* TODO: how to achieve `summary:focus-within` for `::details-content`? */
+/* TODO: how to achieve summary:focus-within for ::details-content? */
 summary:focus-visible,
 textarea:focus-visible {
   accent-color: var(--color-dark-blue);
   background-color: var(--color-focus-gray);
-  color: black;
 }
-input:hover,
+.button:hover,
-select:hover,
+button:hover,
-summary:hover,
+input[type=submit]:hover {
-textarea:hover {
-  border-color: var(--color-blue);
-  outline: 1px solid var(--color-blue);
-}
-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 {
-  border-color: var(--color-red);
-  outline-color: var(--color-red);
-}
-
-/* `.button`: button-styled <a>, <button>, <input type=submit>.
- * `.link`: any other <a>.
- * `.tab`: tab-styled <a>.
- */
-.button,
-.link,
-.tab {
-  cursor: pointer;
-  text-decoration: none;
-  white-space: nowrap;
-}
-.button,
-.tab {
-  align-items: center;
-  color: var(--color-gray);
-  display: flex;
-  fill: var(--color-gray);
-  font-weight: bold;
-}
-.button {
-  border: 1px solid var(--color-gray);
-  border-radius: 0.25em;
-  font-size: 0.8rem;
-  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:focus-visible,
-.tab:focus-visible,
-.tab:hover {
-  background-color: var(--color-focus-gray);
-}
-.button:hover {
   background-color: var(--color-blue);
   border-color: var(--color-blue);
   color: white;
@@ -252,24 +182,32 @@ textarea:invalid {
   background-color: var(--color-red);
   border-color: var(--color-red);
 }
-.link:focus-visible {
+input:hover,
-  text-decoration-color: var(--color-gray);
+select:hover,
+summary:hover,
+textarea:hover {
+  border-color: var(--color-blue);
+  outline: solid 1px var(--color-blue);
 }
-.link:hover {
+select:hover,
-  color: var(--color-blue);
+summary:hover {
-  text-decoration-color: var(--color-blue);
+  cursor: pointer;
 }
-table .button {
+input:invalid,
-  border-color: var(--color-border-gray);
+select:invalid,
-  color: var(--color-table-gray);
+textarea:invalid {
-  font-weight: normal;
+  border-color: var(--color-red);
-  height: 100%;
+  outline: solid 1px var(--color-red);
-  padding: 0.4em;
+}
+input[type=text]:read-only,
+textarea:read-only {
+  border: none;
+  padding-inline: 0;
 }
 
 
-/* NOTE: collapse gaps around empty rows (`topside`) once possible with
+/* NOTE: collapse gaps around empty rows (`topside`) once possible
- * `grid-collapse` property and remove alternative `grid-template-areas`.
+ * with grid-collapse property and remove alternative grid-template
  * https://github.com/w3c/csswg-drafts/issues/5813 */
 body {
   display: grid;
@@ -277,16 +215,16 @@ 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";
 }
 
@@ -302,14 +240,18 @@ header {
   margin-inline-start: 4%;
 }
 .navigation > .tab {
-  border-bottom: 2px solid var(--color-nav-gray);
+  border-bottom: solid 2px var(--color-nav-gray);
   flex: 1;
   font-size: 1rem;
   justify-content: center;
   padding-block: 0.4em;
 }
+.navigation > .tab:hover,
+.navigation > .tab:focus-visible {
+  background-color: var(--color-focus-gray);
+}
 .navigation > .tab.active {
-  border-bottom: 4px solid var(--color-blue);
+  border-bottom: solid 4px var(--color-blue);
   color: var(--color-blue);
   fill: var(--color-blue);
 }
@@ -341,7 +283,7 @@ header {
 
 #flashes {
   display: grid;
-  row-gap: 0.4em;
+  gap: 0.2em;
   grid-template-columns: 1fr auto auto auto 1fr;
   left: 0;
   pointer-events: none;
@@ -357,17 +299,13 @@ header {
   display: grid;
   grid-column: 2/5;
   grid-template-columns: subgrid;
-  line-height: 2.2em;
   pointer-events: auto;
 }
-.flash:before {
-  filter: invert();
-  height: 1.4em;
-  margin: 0 0.5em;
-  width: 1.4em;
-}
 .flash.alert:before {
   content: url('pictograms/alert-outline.svg');
+  height: 1.4em;
+  margin: 0 0.5em;
+  width: 1.4em;
 }
 .flash.alert {
   border-color: var(--color-red);
@@ -375,24 +313,34 @@ header {
 }
 .flash.notice:before {
   content: url('pictograms/check-circle-outline.svg');
+  height: 1.4em;
+  margin: 0 0.5em;
+  width: 1.4em;
 }
 .flash.notice {
   border-color: var(--color-blue);
   background-color: var(--color-blue);
 }
-.flash svg {
+.flash > div {
-  cursor: pointer;
+  grid-column: 2;
-  fill: white;
-  height: 2.2em;
-  opacity: 0.6;
-  padding: 0.4em 0.5em;
-  width: 2.4em;
 }
-.flash svg:hover {
+/* NOTE: currently flash button inherits some unnecessary styles from generic
+ * button. */
+.flash > button {
+  border: none;
+  color: inherit;
+  cursor: pointer;
+  font-size: 1.4em;
+  font-weight: bold;
+  grid-column: 3;
+  opacity: 0.6;
+  padding: 0.2em 0.4em;
+}
+.flash > button:hover {
   opacity: 1;
 }
 
-
+/* TODO: Hover over invalid should work like in measurements (thin vs thick border) */
 .labeled-form {
   align-items: center;
   display: grid;
@@ -409,7 +357,7 @@ header {
 .labeled-form label.required {
   font-weight: bold;
 }
-/* Don't style `label.error + input` if case already covered by `input:invalid`. */
+/* Don't style `label.error + input` if case already covered by input:invalid */
 .labeled-form label.error {
   color: var(--color-red);
 }
@@ -423,123 +371,203 @@ header {
 }
 .labeled-form input[type=submit] {
   font-size: 1rem;
-  margin: 1em auto 0 auto;
+  margin: 1.5em auto 0 auto;
   padding: 0.75em;
 }
-.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. */
-  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;
-}
 
 
-.items-table {
+/* TODO: remove .items class (?) and make 'form table' work properly */
+table.items {
   border-spacing: 0;
-  border: 1px solid var(--color-border-gray);
+  border: solid 1px 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: solid 1px 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;
-  outline: 2px dashed var(--color-blue);
+  outline: dashed 2px var(--color-blue);
   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 stye 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,
+table.items button,
+table.items input[type=submit] {
+  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;
+}
+/* TODO: find a way (layers?) to style inputs differently while making sure
+ * hover works properly without using :not(:hover) selectors here. */
+table.items .button:not(:hover),
+table.items button:not(:hover),
+table.items input:not(:hover),
+table.items select:not(:hover),
+table.items textarea:not(:hover) {
+  border-color: var(--color-border-gray);
+}
+table.items .button:not(:hover),
+table.items button:not(:hover),
+table.items input[type=submit]:not(:hover),
+table.items select:not(:hover) {
+  color: var(--color-table-gray);
+}
+table.items select:focus-within,
+table.items select:focus-visible {
+  color: black;
+}
+form a[name=cancel] {
+  border-color: var(--color-border-gray);
+  color: var(--color-nav-gray);
+  fill: var(--color-nav-gray);
+}
+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;
+}
 
 
-.center {
+.centered {
   margin: 0 auto;
 }
+.extendedright {
+  margin-right: auto;
+}
 .hexpand {
   width: 100%;
 }
-.flex {
+.hflex {
   display: flex;
   gap: 0.8em;
 }
-.flex.reverse {
+.hflex.reverse {
   flex-direction: row-reverse;
 }
-.flex.vertical {
+.hflex.centered {
-  flex-direction: column;
+  justify-content: center;
 }
 .hint {
   color: var(--color-table-gray);
@@ -547,18 +575,21 @@ header {
   font-size: 0.9rem;
   text-align: center;
 }
-.hmin50 {
+.vflex {
-  min-width: 50%;
+  display: flex;
+  gap: 0.8em;
+  flex-direction: column;
 }
-.italic {
+[disabled] {
-  color: var(--color-gray);
+/* label:has(input[disabled]) {
-  font-style: italic;
+ * TODO: disabled checkbox blue square focus removal; disabled label styling;
-}
+ * focused label styling (currently only checkbox has focus)
-.ralign {
+ * */
-  text-align: right;
+  border-color: var(--color-border-gray) !important;
-}
+  color: var(--color-border-gray) !important;
-.rextend {
+  cursor: not-allowed;
-  margin-right: auto;
+  fill: var(--color-border-gray) !important;
+  pointer-events: none;
 }
 
 
@@ -570,12 +601,12 @@ 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');
@@ -587,7 +618,7 @@ summary:has(.button) {
   padding-inline-end: 0;
 }
 summary .button {
-  border: 1px solid var(--color-border-gray);
+  border: solid 1px var(--color-border-gray);
   border-radius: inherit;
   border-top-left-radius: 0;
   border-bottom-left-radius: 0;
@@ -598,15 +629,15 @@ 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. */
+/* 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: solid 1px var(--color-border-gray);
   border-radius: 0.25em;
   box-shadow: 1px 1px 3px var(--color-border-gray);
   margin: -1px 0 0 0;
@@ -628,15 +659,3 @@ li input[type=checkbox] {
 li::marker {
   content: '';
 }
-/*
- * TODO:
- * * disable <label> containing disabled checkbox: `label:has(input[disabled])`,
- * * disabled label styling,
- * * 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
@@ -25,18 +26,6 @@ class ApplicationController < ActionController::Base
   #   Turbo will reload 2nd time with HTML format and flashes will be lost.
   rescue_from *ActionDispatch::ExceptionWrapper.rescue_responses.keys, with: :rescue_turbo
 
-  # Required by #respond_with (gem `responders`) used by Devise controllers.
-  respond_to :html, :turbo_stream
-
-  def after_sign_in_path_for(resource)
-    # TODO: allow setting path per-user or save last path in session and restore
-    units_path
-  end
-
-  def after_sign_out_path_for(resource)
-    new_user_session_path
-  end
-
   protected
 
   def current_user_disguised?
@@ -55,6 +44,16 @@ 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/quantities_controller.rb

@@ -8,10 +8,6 @@ class QuantitiesController < ApplicationController
     raise AccessForbidden unless current_user.at_least(:active)
   end
 
-  before_action only: [:new, :edit, :create, :update] do
-    @user_units = current_user.units.ordered
-  end
-
   def index
     @quantities = current_user.quantities.ordered.includes(:parent, :subquantities)
   end

app/controllers/registrations_controller.rb

@@ -0,0 +1,39 @@
+class RegistrationsController < Devise::RegistrationsController
+  before_action :authenticate_user!, only: [:edit, :update, :destroy]
+
+  def destroy
+    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?
+      params.delete(:password)
+      params.delete(:password_confirmation) if params[:password_confirmation].blank?
+    end
+
+    result = resource.update(params)
+    resource.clean_up_passwords
+    result
+  end
+
+  def after_inactive_sign_up_path_for(resource)
+    new_user_session_path
+  end
+end

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

@@ -1,24 +0,0 @@
-class User::ProfilesController < Devise::RegistrationsController
-  def destroy
-    # TODO: Disallow/disable deletion for last admin account; update :edit view
-    super
-  end
-
-  protected
-
-  def update_resource(resource, params)
-    # Based on update_with_password()
-    if params[:password].blank?
-      params.delete(:password)
-      params.delete(:password_confirmation) if params[:password_confirmation].blank?
-    end
-
-    result = resource.update(params)
-    resource.clean_up_passwords
-    result
-  end
-
-  def after_inactive_sign_up_path_for(resource)
-    new_user_session_path
-  end
-end

app/controllers/users_controller.rb

@@ -37,7 +37,7 @@ class UsersController < ApplicationController
   end
 
   # NOTE: limited actions availabe to :admin by design. Users are meant to
-  # manage their accounts by themselves through profiles. :admin
+  # manage their accounts by themselves through registrations. :admin
   # is allowed to sign-in (disguise) as user and make changes from there.
 
   protected

app/helpers/application_helper.rb

@@ -12,12 +12,6 @@ module ApplicationHelper
       labeled_field_for(method, options) { super }
     end
 
-    def submit(value = nil, options = {})
-      value, options = nil, value if value.is_a?(Hash)
-      options[:class] = @template.class_names('button', options[:class])
-      super
-    end
-
     private
 
     def labeled_field_for(method, options)
@@ -78,15 +72,19 @@ module ApplicationHelper
   end
 
   def labeled_form_for(record, options = {}, &block)
-    extra_options = {builder: LabeledFormBuilder, html: {class: 'labeled-form'}}
+    extra_options = {builder: LabeledFormBuilder,
-    form_for(record, **merge_attributes(options, extra_options), &block)
+                     data: {turbo: false},
+                     html: {class: 'labeled-form'}}
+    options = options.deep_merge(extra_options) do |key, left, right|
+      key == :class ? class_names(left, right) : right
+    end
+    form_for(record, **options, &block)
   end
 
   class TabularFormBuilder < ActionView::Helpers::FormBuilder
     def initialize(...)
       super(...)
       @default_options.merge!(@options.slice(:form))
-      @default_html_options.merge!(@options.slice(:form))
     end
 
     [:text_field, :password_field, :text_area].each do |selector|
@@ -103,28 +101,20 @@ 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
 
     def button(value = nil, options = {}, &block)
-      # #button does not use #objectify_options/@default_options
+      # button does not use #objectify_options
-      value, options = nil, value if value.is_a?(Hash)
+      options.merge!(@options.slice(:form))
-      options = options.merge(
-        @default_options.slice(:form),
-        class: @template.class_names('button', options[:class])
-      )
       super
     end
 
@@ -145,22 +135,20 @@ module ApplicationHelper
     # [autofocus].  Otherwise IDs are not unique when multiple forms are open
     # and the first input gets focus.
     record_object, options = nil, record_object if record_object.is_a?(Hash)
-    extra_options = {builder: TabularFormBuilder, skip_default_ids: true}
+    options.merge!(builder: TabularFormBuilder, skip_default_ids: true)
-    options = merge_attributes(options, extra_options)
     # TODO: set error message with setCustomValidity instead of rendering to flash?
     render_errors(record_object || record_name)
     fields_for(record_name, record_object, **options, &block)
   end
 
   def tabular_form_with(**options, &block)
-    extra_options = {builder: TabularFormBuilder, class: 'tabular-form',
+    options = options.deep_merge(builder: TabularFormBuilder,
-                     html: {autocomplete: 'off'}}
+                                 html: {autocomplete: 'off'})
-    form_with(**merge_attributes(options, extra_options), &block)
+    form_with(**options, &block)
   end
 
   def svg_tag(source, label = nil, options = {})
-    label, options = nil, label if label.is_a? Hash
+    svg_tag = tag.svg(options) do
-    svg_tag = tag.svg(**options) do
       tag.use(href: "#{image_path(source + ".svg")}#icon")
     end
     label.blank? ? svg_tag : svg_tag + tag.span(label)
@@ -171,7 +159,6 @@ module ApplicationHelper
       ['measurements', 'scale-bathroom', :restricted],
       ['quantities', 'axis-arrow', :restricted, 'right'],
       ['units', 'weight-gram', :restricted],
-      # TODO: display users tab only if >1 user present; sole_user?/sole_admin?
       ['users', 'account-multiple-outline', :admin],
     ]
 
@@ -219,7 +206,6 @@ module ApplicationHelper
 
   def render_errors(records)
     # Conversion of flash to Array only required because of Devise
-    # TODO: override Devise message setting to Array()?
     flash[:alert] = Array(flash[:alert])
     Array(records).each { |record| flash[:alert] += record.errors.full_messages }
   end
@@ -229,8 +215,8 @@ module ApplicationHelper
       # Conversion of flash to Array only required because of Devise
       Array(messages).map do |message|
         tag.div class: "flash #{entry}" do
-          tag.span(sanitize(message)) +
+          tag.div(sanitize(message)) + tag.button(sanitize("&times;"), tabindex: -1,
-            svg_tag('pictograms/close-outline', {onclick: "this.parentElement.remove()"})
+                                                  onclick: "this.parentElement.remove();")
         end
       end
     end.join.html_safe
@@ -266,11 +252,4 @@ module ApplicationHelper
 
     [name, html_options]
   end
-
-  # Like Hash#deep_merge, but aware of HTML attributes.
-  def merge_attributes(left, right)
-    left.deep_merge(right) do |key, lvalue, rvalue|
-      key == :class ? class_names(lvalue, rvalue) : rvalue
-    end
-  end
 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/javascript/application.js

@@ -37,18 +37,6 @@ window.detailsObserver = new MutationObserver((mutations) => {
   mutations[0].target.dispatchEvent(new Event('change', {bubbles: true}))
 });
 
-function formValidate(event) {
-  var id = event.submitter.getAttribute("data-validate")
-  if (!id) return;
-
-  var input = document.getElementById(id)
-  if (!input.checkValidity()) {
-    input.reportValidity()
-    event.preventDefault()
-  }
-}
-window.formValidate = formValidate
-
 
 /* Turbo stream actions */
 Turbo.StreamElement.prototype.disableElement = function(element) {

app/models/quantity.rb

@@ -1,10 +1,9 @@
 class Quantity < ApplicationRecord
-  ATTRIBUTES = [:name, :description, :parent_id, :default_unit_id]
+  ATTRIBUTES = [:name, :description, :parent_id]
   attr_cached :depth, :pathname
 
   belongs_to :user, optional: true
   belongs_to :parent, optional: true, class_name: "Quantity"
-  belongs_to :default_unit, optional: true, class_name: "Unit"
   has_many :subquantities, ->{ order(:name) }, class_name: "Quantity",
     inverse_of: :parent, dependent: :restrict_with_error
 
@@ -16,8 +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

app/models/readout.rb

@@ -1,5 +1,5 @@
 class Readout < ApplicationRecord
-  ATTRIBUTES = [:quantity_id, :value, :unit_id, :taken_at]
+  ATTRIBUTES = [:quantity_id, :value, :unit_id]
 
   belongs_to :user
   belongs_to :quantity

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
 

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 +1,28 @@
 <%= tabular_form_with model: Measurement.new, id: :measurement_form,
-  class: 'topside-area flex vertical center',
+  class: 'topside-area vflex', html: {onkeydown: 'formProcessKey(event)'} do |form| %>
-  html: {onkeydown: 'formProcessKey(event)'} do |form| %>
+  <table class="items centered">
-
+    <tbody id="readouts"></tbody>
-  <table class="items-table center">
-    <tbody id="readouts">
-      <%= tabular_fields_for @measurement do |form| %>
-        <tr class="italic">
-          <td class="hexpand hmin50"><%= t '.taken_at_html' %></td>
-          <td colspan="3" class="ralign">
-            <%= form.datetime_field :taken_at, required: true, value: Time.current.strftime('%Y-%m-%dT%H:%M') %>
-          </td>
-        </tr>
-      <% end %>
-    </tbody>
   </table>
 
-  <%# TODO: right-click selection; unnecessary with hierarchical tags? %>
+  <div class="hflex">
-  <details id="quantity_select" class="center hexpand" open
+    <%# TODO: right-click selection %>
-           onkeydown="detailsProcessKey(event)">
+    <details id="quantity_select" class="hexpand" open
-    <summary autofocus>
+             onkeydown="detailsProcessKey(event)">
-      <!-- TODO: Set content with CSS when span empty to avoid duplication -->
+      <summary autofocus>
-      <span data-prompt="<%= t('.select_quantity') %>">
+        <!-- TODO: Set content with CSS when span empty to avoid duplication -->
-        <%= t('.select_quantity') %>
+        <span data-prompt="<%= t('.select_quantity') %>">
-      </span>
+          <%= t('.select_quantity') %>
-      <%= image_button_tag t(:apply), "update", name: nil, disabled: true,
+        </span>
-        formaction: new_readout_path, formmethod: :get, formnovalidate: true,
+        <%= image_button_tag t(:apply), "update", name: nil, disabled: true,
-        data: {turbo_stream: true} %>
+          formaction: new_readout_path, formmethod: :get, formnovalidate: true,
-    </summary>
+          data: {turbo_stream: true} %>
-    <ul><%= quantities_check_boxes(@quantities) %></ul>
+      </summary>
-  </details>
+      <ul><%= quantities_check_boxes %></ul>
-
+    </details>
-  <div class="flex reverse">
     <%= form.button id: :create_measurement_button, disabled: true -%>
+  </div>
+
+  <div class="hflex reverse">
     <%= image_link_to t(:cancel), "close-outline", measurements_path, name: :cancel,
       class: 'dangerous', onclick: render_turbo_stream('form_close') %>
   </div>

app/views/quantities/_form.html.erb

@@ -8,13 +8,8 @@
     <td>
       <%= form.text_area :description, cols: 30, rows: 1, escape: false %>
     </td>
-    <td>
-      <%= form.collection_select :default_unit_id, @user_units, :id,
-        ->(u){ sanitize('&emsp;' * (u.base_id? ? 1 : 0) + u.symbol) },
-        {include_blank: true}, onchange: "this.dataset.changed = ''" %>
-    </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

@@ -5,15 +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>
-  <td><%= quantity.default_unit&.symbol %></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

@@ -8,15 +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>
-      <th><%= Quantity.human_attribute_name(:default_unit) %></th>
       <% if current_user.at_least(:active) %>
         <th><%= t :actions %></th>
         <th></th>
@@ -26,7 +24,7 @@
                ondragover: "dragOver(event)", ondrop: "drop(event)",
                ondragenter: "dragEnter(event)", ondragleave: "dragLeave(event)",
                data: {drop_id: "quantity_", drop_id_param: "quantity[parent_id]"} do %>
-      <th colspan="5"><%= t '.top_level_drop' %></th>
+      <th colspan="4"><%= t '.top_level_drop' %></th>
     <% end %>
   </thead>
   <tbody id="quantities">

app/views/readouts/_form.html.erb

@@ -1,31 +1,25 @@
 <%# TODO: add readout reordering by dragging %>
 <%= tabular_fields_for 'readouts[]', readout do |form| %>
   <%- tag.tr id: dom_id(readout.quantity, :new, :readout) do %>
-    <td>
+    <td class="actions">
-      <%# TODO: add grayed readout index (in separate column?) %>
-      <%= readout.quantity.relative_pathname(@superquantity) %>
-      <%= 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) },
-        {prompt: '', disabled: '', selected: readout.quantity.default_unit_id || ''}, required: true,
-        data: {default_unit_id: readout.quantity.default_unit_id || ''},
-        onchange: "readoutUnitChanged(this)" %>
-    </td>
-    <td class="flex">
       <%# TODO: change to _link_ after giving up displaying relative paths %>
-      <%= image_button_tag '', 'check-circle-outline',
-        class: 'set-default-unit', name: nil, type: 'button', disabled: true,
-        title: t('readouts.form.set_default_unit'),
-        data: {path: quantity_path(readout.quantity)},
-        onclick: 'setDefaultUnit(this)' %>
       <%= image_button_tag '', 'delete-outline', class: 'dangerous', name: nil,
         formaction: discard_readouts_path(readout.quantity),
         formmethod: :get, formnovalidate: true, data: {turbo_stream: true} %>
     </td>
+    <td>
+      <%= readout.quantity.relative_pathname(@superquantity) %>
+    </td>
+    <td>
+      <%= form.number_field :value, required: true,
+        size: readout.type_for_attribute(:value).precision / 2,
+        autofocus: readout_counter == 0 %>
+    </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) },
+        {prompt: t('.select_unit'), disabled: '', selected: ''}, required: true %>
+    </td>
   <% end %>
 <% end %>

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/confirmations/create.turbo_stream.erb

@@ -1 +0,0 @@
-<% flash.discard %>

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

@@ -0,0 +1,9 @@
+<%= labeled_form_for resource, url: user_confirmation_path,
+  html: {class: 'main-area'} do |f| %>
+
+  <%= f.email_field :email, required: true, size: 30, autofocus: true,
+    autocomplete: 'email', value:
+    resource.pending_reconfirmation? ? resource.unconfirmed_email : resource.email %>
+
+  <%= f.submit t(:resend_confirmation) %>
+<% end %>

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/passwords/create.turbo_stream.erb

@@ -1,2 +0,0 @@
-<%# For some reason flash messages are duplicated in bot flash and flash.now %>
-<% flash.discard %>

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

@@ -1,5 +1,5 @@
 <%= labeled_form_for resource, url: user_password_path,
-  html: {method: :put, class: 'main-area', data: {turbo: false}} do |f| %>
+  html: {method: :put, class: 'main-area'} do |f| %>
 
   <%= f.hidden_field :reset_password_token %>
 

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

@@ -0,0 +1,8 @@
+<%= labeled_form_for resource, url: user_password_path,
+  html: {class: 'main-area'} do |f| %>
+
+  <%= f.email_field :email, required: true, size: 30, autofocus: true,
+    autocomplete: 'email' %>
+
+  <%= f.submit t(:recover_password) %>
+<% end %>

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

@@ -1,16 +0,0 @@
-<%= labeled_form_for resource, url: user_registration_path,
-  html: {class: 'main-area', onsubmit: 'formValidate(event)'} do |f| %>
-
-  <%= f.email_field :email, required: true, size: 30, autofocus: true,
-    autocomplete: 'email' %>
-  <%= f.password_field :password, required: true, size: 30,
-    minlength: @minimum_password_length, autocomplete: 'new-password' %>
-  <%= f.password_field :password_confirmation, required: true, size: 30,
-    minlength: @minimum_password_length, autocomplete: 'off' %>
-
-  <%= f.submit t(:register), data: {turbo: false} %>
-
-  <%= image_button_tag t(:resend_confirmation), 'email-sync-outline',
-    class: 'auxiliary', formaction: user_confirmation_path, formnovalidate: true,
-    data: {validate: f.field_id(:email)} %>
-<% end %>

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

@@ -0,0 +1,16 @@
+<div class="main-area">
+  <%= labeled_form_for resource, url: user_registration_path do |f| %>
+    <%= f.email_field :email, required: true, size: 30, autofocus: true,
+      autocomplete: 'email' %>
+    <%= f.password_field :password, required: true, size: 30,
+      minlength: @minimum_password_length, autocomplete: 'new-password' %>
+    <%= f.password_field :password_confirmation, required: true, size: 30,
+      minlength: @minimum_password_length, autocomplete: 'off' %>
+
+    <%= f.submit t(:register) %>
+  <% end %>
+
+  <%= content_tag :p, t(:or), style: 'text-align: center;' %>
+  <%= image_link_to t(:resend_confirmation), 'email-sync-outline',
+    new_user_confirmation_path, class: 'centered' %>
+</div>

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

@@ -1,19 +1,18 @@
-<%= labeled_form_for resource, url: user_session_path,
+<div class="main-area">
-  html: {class: 'main-area', onsubmit: 'formValidate(event)'} do |f| %>
+  <%= labeled_form_for resource, url: user_session_path do |f| %>
+    <%= f.email_field :email, required: true, size: 30, autofocus: true,
+      autocomplete: 'email' %>
+    <%= f.password_field :password, required: true, size: 30,
+      minlength: @minimum_password_length, autocomplete: 'current-password' %>
 
-  <%= f.email_field :email, required: true, size: 30, autofocus: true,
+    <% if devise_mapping.rememberable? %>
-    autocomplete: 'email' %>
+      <%= f.check_box :remember_me %>
-  <%= f.password_field :password, required: true, size: 30,
+    <% end %>
-    autocomplete: 'current-password' %>
 
-  <% if devise_mapping.rememberable? %>
+    <%= f.submit t(:sign_in) %>
-    <%= f.check_box :remember_me %>
   <% end %>
 
-  <%# /sign_in as HTML; /password as TURBO_STREAM %>
+  <%= content_tag :p, t(:or), style: 'text-align: center;' %>
-  <%= f.submit t(:sign_in), data: {turbo: false} %>
+  <%= image_link_to t(:recover_password), 'lock-reset', new_user_password_path,
-
+    class: 'centered' %>
-  <%= image_button_tag t(:recover_password), 'lock-reset', class: 'auxiliary',
+</div>
-    formaction: user_password_path, formnovalidate: true,
-    data: {validate: f.field_id(:email)} %>
-<% end %>

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

@@ -54,5 +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/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 Capybara's dynamic test server host (127.0.0.1:<random_port>)
-  config.hosts << '127.0.0.1'
 end

config/initializers/devise.rb

@@ -91,7 +91,7 @@ Devise.setup do |config|
   # It will change confirmation, password recovery and other workflows
   # to behave the same regardless if the e-mail provided was right or wrong.
   # Does not affect registerable.
-  config.paranoid = true
+  # config.paranoid = true
 
   # By default Devise will store the user in session. You can skip storage for
   # particular strategies by setting this option.

config/locales/devise.en.yml

@@ -4,15 +4,15 @@ en:
   devise:
     confirmations:
       confirmed: "Your email address has been successfully confirmed."
-      send_paranoid_instructions: >
+      send_instructions: "You will receive an email with instructions for how to confirm your email address in a few minutes."
-        If your email address is in our database, a message with instructions on how
+      send_paranoid_instructions: "If your email address exists in our database, you will receive an email with instructions for how to confirm your email address in a few minutes."
-        to confirm your email address has been sent to you.
     failure:
       already_authenticated: "You are already signed in."
       inactive: "Your account is not activated yet."
-      invalid: "Invalid <b>%{authentication_keys}</b> or <b>password</b>."
+      invalid: "Invalid %{authentication_keys} or password."
       locked: "Your account is locked."
       last_attempt: "You have one more attempt before your account is locked."
+      not_found_in_database: "Invalid %{authentication_keys} or password."
       timeout: "Your session expired. Please sign in again to continue."
       unauthenticated: "You need to sign in or sign up before continuing."
       unconfirmed: "You have to confirm your email address before continuing."
@@ -32,9 +32,8 @@ en:
       success: "Successfully authenticated from %{kind} account."
     passwords:
       no_token: "You can't access this page without coming from a password reset email. If you do come from a password reset email, please make sure you used the full URL provided."
-      send_paranoid_instructions: >
+      send_instructions: "You will receive an email with instructions on how to reset your password in a few minutes."
-        If your email address is in our database, the password recovery link has been
+      send_paranoid_instructions: "If your email address exists in our database, you will receive a password recovery link at your email address in a few minutes."
-        sent to you.
       updated: "Your password has been changed successfully. You are now signed in."
       updated_not_active: "Your password has been changed successfully."
     registrations:
@@ -51,6 +50,7 @@ en:
       signed_out: "Signed out successfully."
       already_signed_out: "Signed out successfully."
     unlocks:
+      send_instructions: "You will receive an email with instructions for how to unlock your account in a few minutes."
       send_paranoid_instructions: "If your account exists, you will receive an email with instructions for how to unlock it in a few minutes."
       unlocked: "Your account has been unlocked successfully. Please sign in to continue."
   errors:

config/locales/en.yml

@@ -11,13 +11,8 @@ en:
   activerecord:
     attributes:
       quantity:
-        default_unit: Default unit
         description: Description
         name: Name
-      readout:
-        created_at: Recorded at
-        taken_at: Taken at
-        value: Value
       unit:
         base: Base unit
         description: Description
@@ -86,26 +81,16 @@ en:
       revert: Revert
       sign_out: Sign out
       source_code: Get code
-  readouts:
-    form:
-      set_default_unit: Set as default unit
   measurements:
     navigation: Measurements
     no_items: There are no measurements taken. You can Add some now.
     form:
-      select_quantity: select quantities...
+      select_quantity: select the measured quantities...
-      taken_at_html: Measurement taken at 
     index:
       new_measurement: Add measurement
-    readout:
+  readouts:
-      destroy: Delete
+    form:
-    create:
+      select_unit: ...
-      success:
-        one: Recorded 1 measurement.
-        other: Recorded %{count} measurements.
-      no_readouts: No readouts selected.
-    destroy:
-      success: Measurement deleted.
   quantities:
     navigation: Quantities
     no_items: There are no configured quantities. You can Add some or Import from defaults.
@@ -165,7 +150,7 @@ en:
       edit:
         password_html: 'New password:%{password_length_hint_html}'
         update_password: Update password
-    profiles:
+    registrations:
       new:
         password_html: 'Password:%{password_length_hint_html}'
         password_confirmation: 'Retype password:'
@@ -177,13 +162,34 @@ 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
   cancel: Cancel
   delete: Delete
   :no: 'no'
+  or: or
   register: Register
   sign_in: Sign in
   recover_password: Recover password

config/routes.rb

@@ -1,4 +1,7 @@
 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
@@ -24,9 +27,8 @@ Rails.application.routes.draw do
   # https://github.com/heartcombo/devise/issues/5786
   connection = ActiveRecord::Base.connection
   if connection.schema_version && connection.table_exists?(:users)
-    # NOTE: change helper prefix from *_registration to *_profile once possible
     devise_for :users, path: '', path_names: {registration: 'profile'},
-      controllers: {registrations: 'user/profiles'}
+      controllers: {registrations: :registrations}
   end
 
   resources :users, only: [:index, :show, :update] do
@@ -35,7 +37,9 @@ Rails.application.routes.draw do
   end
 
   unauthenticated do
-    root to: redirect('/sign_in')
+    as :user do
+      root to: redirect('/sign_in')
+    end
   end
   root to: redirect('/units'), as: :user_root
 

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/migrate/20260402000000_add_taken_at_to_readouts.rb

@@ -1,6 +0,0 @@
-class AddTakenAtToReadouts < ActiveRecord::Migration[7.2]
-  def change
-    add_column :readouts, :taken_at, :datetime
-    add_index :readouts, [:user_id, :taken_at]
-  end
-end

db/migrate/20260403000000_add_default_unit_to_quantities.rb

@@ -1,5 +0,0 @@
-class AddDefaultUnitToQuantities < ActiveRecord::Migration[7.2]
-  def change
-    add_reference :quantities, :default_unit, foreign_key: {to_table: :units}, null: true
-  end
-end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.2].define(version: 2026_04_03_000000) do
+ActiveRecord::Schema[7.2].define(version: 2025_01_21_230456) do
   create_table "quantities", charset: "utf8mb4", collation: "utf8mb4_0900_as_ci", force: :cascade do |t|
     t.bigint "user_id"
     t.string "name", limit: 31, null: false
@@ -20,8 +20,6 @@ ActiveRecord::Schema[7.2].define(version: 2026_04_03_000000) do
     t.datetime "updated_at", null: false
     t.integer "depth", default: 0, null: false
     t.string "pathname", limit: 511, null: false
-    t.bigint "default_unit_id"
-    t.index ["default_unit_id"], name: "index_quantities_on_default_unit_id"
     t.index ["parent_id"], name: "index_quantities_on_parent_id"
     t.index ["user_id", "parent_id", "name"], name: "index_quantities_on_user_id_and_parent_id_and_name", unique: true
     t.index ["user_id"], name: "index_quantities_on_user_id"
@@ -34,12 +32,10 @@ ActiveRecord::Schema[7.2].define(version: 2026_04_03_000000) do
     t.decimal "value", precision: 30, scale: 15, null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
-    t.datetime "taken_at"
     t.index ["quantity_id", "created_at"], name: "index_readouts_on_quantity_id_and_created_at", unique: true
     t.index ["quantity_id"], name: "index_readouts_on_quantity_id"
     t.index ["unit_id"], name: "index_readouts_on_unit_id"
     t.index ["user_id"], name: "index_readouts_on_user_id"
-    t.index ["user_id", "taken_at"], name: "index_readouts_on_user_id_and_taken_at"
   end
 
   create_table "units", charset: "utf8mb4", collation: "utf8mb4_0900_as_ci", force: :cascade do |t|
@@ -74,7 +70,6 @@ ActiveRecord::Schema[7.2].define(version: 2026_04_03_000000) do
   end
 
   add_foreign_key "quantities", "quantities", column: "parent_id", on_delete: :cascade
-  add_foreign_key "quantities", "units", column: "default_unit_id"
   add_foreign_key "quantities", "users"
   add_foreign_key "readouts", "quantities"
   add_foreign_key "readouts", "units"

db/seeds.rb

@@ -3,13 +3,25 @@
 #   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
 
-  User.create! email: Rails.configuration.admin, password: 'admin', status: :admin do |user|
+  password = SecureRandom.alphanumeric(12)
+  User.create! email: Rails.configuration.admin, password: password, status: :admin do |user|
     user.skip_confirmation!
-    print "Creating #{user.status} account '#{user.email}' with password '#{user.password}'..."
+    print "Creating #{user.status} account '#{user.email}' with password '#{password}'..."
   end
   puts "done."
 

test/application_system_test_case.rb

@@ -1,7 +1,6 @@
 require "test_helper"
 
 class ApplicationSystemTestCase < ActionDispatch::SystemTestCase
-  include ActionView::Helpers::SanitizeHelper
   include ActionView::Helpers::UrlHelper
 
   # NOTE: geckodriver installed with Firefox, ignore incompatibility warning
@@ -33,8 +32,7 @@ class ApplicationSystemTestCase < ActionDispatch::SystemTestCase
   # Allow skipping interpolations when translating for testing purposes
   INTERPOLATION_PATTERNS = Regexp.union(I18n.config.interpolation_patterns)
   def translate(key, **options)
-    translation = options.empty? ? super.split(INTERPOLATION_PATTERNS, 2).first : super
+    options.empty? ? super.split(INTERPOLATION_PATTERNS, 2).first : super
-    sanitize(translation, tags: [])
   end
   alias :t :translate
 

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/system/quantities_test.rb

@@ -1,45 +0,0 @@
-require "application_system_test_case"
-
-class QuantitiesTest < ApplicationSystemTestCase
-  setup do
-    @user = sign_in(user: users(:alice))
-    @unit = @user.units.create!(symbol: 'kg')
-    @quantity = @user.quantities.create!(name: 'Weight')
-    visit quantities_path
-  end
-
-  test "update button turns red when default unit changes" do
-    click_on 'Weight'
-
-    button = find('button[name=button]')
-    initial_color = evaluate_script("getComputedStyle(arguments[0]).backgroundColor", button)
-
-    select 'kg', from: 'quantity[default_unit_id]'
-
-    changed_color = evaluate_script("getComputedStyle(arguments[0]).backgroundColor", button)
-    refute_equal initial_color, changed_color, "Button color should change when default unit is altered"
-  end
-
-  test "saving default unit pre-selects it in measurements form" do
-    click_on 'Weight'
-    select 'kg', from: 'quantity[default_unit_id]'
-    click_on t('helpers.submit.update')
-    assert_selector '.flash.notice'
-
-    @quantity.reload
-    assert_equal @unit.id, @quantity.default_unit_id
-
-    visit measurements_path
-    find(:link_or_button, t('measurements.index.new_measurement')).click
-    assert_selector '#measurement_form'
-
-    within '#quantity_select' do
-      check 'Weight'
-    end
-    find('button[formaction]').click
-
-    within 'tbody#readouts' do
-      assert_selector "option[value='#{@unit.id}'][selected]"
-    end
-  end
-end

test/system/users_test.rb

@@ -5,8 +5,8 @@ class UsersTest < ApplicationSystemTestCase
     @admin = users(:admin)
   end
 
-  test 'sign in' do
+  test "sign in" do
-    visit root_url
+    visit new_user_session_path
     assert find_link(href: new_user_session_path)[:disabled]
 
     sign_in
@@ -14,23 +14,16 @@ class UsersTest < ApplicationSystemTestCase
     assert_text t('devise.sessions.signed_in')
   end
 
-  test 'sign in fails with invalid credentials' do
+  test 'sign in fails with invalid password' do
-    label = User.human_attribute_name(:email)
+    sign_in password: random_password
-    # Both: valid and invalid emails should give the same (paranoid) error message.
-    email = [users.sample.email, random_email].sample
-
-    visit root_url
-    fill_in label, with: email
-    fill_in User.human_attribute_name(:password), with: random_password
-    click_on t(:sign_in)
-
     assert_current_path new_user_session_path
-    assert_text t('devise.failure.invalid', authentication_keys: label.downcase_first)
+    assert_text t('devise.failure.not_found_in_database',
+                  authentication_keys: User.human_attribute_name(:email))
     assert find_link(href: new_user_session_path)[:disabled]
-    assert has_field?(label, with: email)
+    assert_not_empty find_field(User.human_attribute_name(:email)).value
   end
 
-  test 'sign out' do
+  test "sign out" do
     sign_in
     visit root_url
     click_on t("layouts.application.sign_out")
@@ -38,106 +31,79 @@ class UsersTest < ApplicationSystemTestCase
     assert_text t("devise.sessions.signed_out")
   end
 
-  test 'recover password' do
+  test "recover password" do
-    label = User.human_attribute_name(:email)
+    visit new_user_session_url
-    email = users.select(&:confirmed?).sample.email
+    click_on t(:recover_password)
-
-    visit root_url
-    fill_in label, with: email
-    # Form validations should allow empty password.
-    assert has_field?(User.human_attribute_name(:password), with: nil)
 
+    fill_in User.human_attribute_name(:email),
+      with: users.select(&:confirmed?).sample.email
     assert_emails 1 do
       click_on t(:recover_password)
+      # Wait until redirected to make sure async request has been processed
       assert_current_path new_user_session_path
-      # Wait for flash message to make sure async request has been processed.
-      assert_text t("devise.passwords.send_paranoid_instructions")
     end
-    assert has_field?(label, with: email)
+    assert_text t("devise.passwords.send_instructions")
 
     with_last_email do |mail|
       visit Capybara.string(mail.body.to_s).find_link("Change my password")[:href]
-      assert_current_path edit_user_password_path, ignore_query: true
-      # Make sure flash message is not displayed twice.
-      assert_no_text t("devise.passwords.send_paranoid_instructions")
     end
     new_password = random_password
     fill_in t("users.passwords.edit.password_html"), with: new_password
     fill_in t("helpers.label.user.password_confirmation"), with: new_password
     assert_emails 1 do
       click_on t("users.passwords.edit.update_password")
+      # Wait until redirected to make sure async request has been processed
       assert_current_path units_path
-      assert_text t("devise.passwords.updated")
     end
+    assert_text t("devise.passwords.updated")
   end
 
-  test 'recover password for nonexistent user' do
+  test "register" do
-    label = User.human_attribute_name(:email)
+    visit new_user_session_url
-    email = random_email
-
-    visit root_url
-    fill_in label, with: email
-
-    assert_no_emails do
-      click_on t(:recover_password)
-      assert_current_path new_user_session_path
-      assert_text t("devise.passwords.send_paranoid_instructions")
-    end
-  end
-
-  test 'register' do
-    visit root_url
     click_on t(:register)
-    assert find_link(href: new_user_registration_path)[:disabled]
 
     fill_in User.human_attribute_name(:email), with: random_email
     password = random_password
     fill_in User.human_attribute_name(:password), with: password
-    fill_in t("users.profiles.new.password_confirmation"), with: password
+    fill_in t("users.registrations.new.password_confirmation"), with: password
-    assert_difference ->{ User.count }, 1 do
+    assert_difference ->{User.count}, 1 do
       assert_emails 1 do
         click_on t(:register)
+        # Wait until redirected to make sure async request has been processed
         assert_current_path new_user_session_path
-        assert_text t("devise.registrations.signed_up_but_unconfirmed")
       end
     end
+    assert_text t("devise.registrations.signed_up_but_unconfirmed")
 
-    assert_changes ->{ User.last.confirmed? }, from: false, to: true do
+    with_last_email do |mail|
-      with_last_email do |mail|
+      visit Capybara.string(mail.body.to_s).find_link("Confirm my account")[:href]
-        visit Capybara.string(mail.body.to_s).find_link("Confirm my account")[:href]
-        assert_current_path new_user_session_path
-        assert_text t("devise.confirmations.confirmed")
-      end
     end
+    assert_current_path new_user_session_path
+    assert_text t("devise.confirmations.confirmed")
+    assert User.last.confirmed?
   end
 
-  test 'resend confirmation' do
+  test "resend confirmation" do
-    label = User.human_attribute_name(:email)
+    visit new_user_session_url
-    user = users.reject(&:confirmed?).sample
-
-    visit root_url
     click_on t(:register)
-    fill_in label, with: user.email
+    click_on t(:resend_confirmation)
-    assert has_field?(User.human_attribute_name(:password), with: nil)
 
+    fill_in User.human_attribute_name(:email),
+      with: users.reject(&:confirmed?).sample.email
     assert_emails 1 do
       click_on t(:resend_confirmation)
-      assert_current_path new_user_registration_path
+      # Wait until redirected to make sure async request has been processed
-      assert_text t("devise.confirmations.send_paranoid_instructions")
+      assert_current_path new_user_session_path
     end
-    assert has_field?(label, with: user.email)
+    assert_current_path new_user_session_path
+    assert_text t("devise.confirmations.send_instructions")
 
-    assert_changes ->{ user.reload.confirmed? }, from: false, to: true do
+    with_last_email do |mail|
-      with_last_email do |mail|
+      visit Capybara.string(mail.body.to_s).find_link("Confirm my account")[:href]
-        visit Capybara.string(mail.body.to_s).find_link("Confirm my account")[:href]
-        assert_current_path new_user_session_path
-        assert_no_text t("devise.confirmations.send_paranoid_instructions")
-        assert_text t("devise.confirmations.confirmed")
-      end
     end
   end
 
-  test 'show profile' do
+  test "show profile" do
     sign_in user: users.select(&:admin?).select(&:confirmed?).sample
     click_on t("users.navigation")
     within all('tr').drop(1).sample do |tr|
@@ -147,7 +113,7 @@ class UsersTest < ApplicationSystemTestCase
     end
   end
 
-  test 'disguise' do
+  test "disguise" do
     user = users.select(&:admin?).select(&:confirmed?).sample
     sign_in user: user
 
@@ -163,7 +129,7 @@ class UsersTest < ApplicationSystemTestCase
     assert_link user.email
   end
 
-  test 'disguise fails for admin when disallowed' do
+  test "disguise fails for admin when disallowed" do
     user = users.select(&:admin?).select(&:confirmed?).sample
     sign_in user: user
 
@@ -176,37 +142,45 @@ class UsersTest < ApplicationSystemTestCase
     assert_title 'The change you wanted was rejected (422)'
   end
 
-  test 'disguise forbidden for non admin' do
+  test "disguise forbidden for non admin" do
     sign_in user: users.reject(&:admin?).select(&:confirmed?).sample
     visit disguise_user_path(User.all.sample)
     assert_title 'Access is forbidden to this page (403)'
   end
 
-  test 'delete profile' do
+  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)
       first(:link_or_button, user.email).click
     end
     assert_difference ->{ User.count }, -1 do
-      accept_confirm { click_on t("users.profiles.edit.delete") }
+      accept_confirm { click_on t("users.registrations.edit.delete") }
       assert_current_path new_user_session_path
     end
     assert_text t("devise.registrations.destroyed")
   end
 
-  test 'index forbidden for non admin' do
+  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
     assert_title "Access is forbidden to this page (403)"
   end
 
-  test 'update profile' do
+  test "update profile" do
     # TODO
   end
 
-  test 'update status' do
+  test "update status" do
     sign_in user: users.select(&:admin?).select(&:confirmed?).sample
     visit users_path
 
@@ -221,7 +195,7 @@ class UsersTest < ApplicationSystemTestCase
     assert_current_path users_path
   end
 
-  test 'update status fails for admin when disallowed' do
+  test "update status fails for admin when disallowed" do
     sign_in user: users.select(&:admin?).select(&:confirmed?).sample
     visit users_path
 
@@ -229,12 +203,12 @@ class UsersTest < ApplicationSystemTestCase
       user = User.find_by_email!(first(:link).text)
       inject_button_to first('td:not(.link)'), "update status", user_path(user), method: :patch,
         params: {user: {status: User.statuses.keys.sample}}, data: {turbo: false}
-      execute_script("arguments[0].click()", find_button("update status"))
+      click_on "update status"
     end
     assert_title 'The change you wanted was rejected (422)'
   end
 
-  test 'update status forbidden for non admin' do
+  test "update status forbidden for non admin" do
     sign_in user: users.reject(&:admin?).select(&:confirmed?).sample
     visit units_path
     inject_button_to find('body'), "update status", user_path(User.all.sample), method: :patch,