Accessibility work on the UI layer, all of it rooted in one structural gap:
there were no form primitives, so every field was hand-assembled and every
field got the same details wrong.
Form primitives
- components/ui/Field.tsx (Field/TextField/SelectField/TextareaField) and
Button.tsx. Field generates the control id with useId and derives htmlFor
from it, which is what makes the association impossible to omit rather
than merely conventional.
- 92 labels existed, 4 used htmlFor, and no input carried an id at all: a
screen reader announced an unnamed edit box and clicking a label focused
nothing. Now every label resolves to its control (0 unassociated), and the
input class chain that appeared verbatim 85 times appears zero times.
- Field also takes a render prop, so Lookup, CountryPicker and Picklist get
the same wiring instead of a second, partial solution.
- SearchInput replaces three hand-rolled copies of the icon-in-a-box search
whose input had only a placeholder — not a label — and killed its own
focus ring with outline-none and nothing in its place.
- Toggle groups (workdays, reorg change type) became fieldsets with
aria-pressed; colour alone was carrying the selected state.
Comboboxes
- Lookup and CountryPicker were text inputs with a div of clickable buttons
underneath: typeable, but no keyboard path to a result and nothing telling
a screen reader a list had appeared. Both now carry role=combobox,
aria-expanded/controls/activedescendant and listbox semantics, with arrow
keys, Enter and Escape. Escape stops propagation, or it would close the
surrounding dialog along with the dropdown.
Dialogs
- useDialogFocus centralises what Modal and SlideOver each owed the
keyboard and neither provided beyond Escape: focus into the dialog on
open, Tab and Shift+Tab cycling within it, focus restored to the trigger
on close.
- SlideOver stays mounted for its transition, and aria-hidden does not
remove anything from the tab order — so every closed panel was leaving
invisible tab stops at the end of the page. `inert` fixes that.
Route states
- loading.tsx, error.tsx, not-found.tsx and global-error.tsx. Every page in
the (app) group is server-rendered per request, so without loading.tsx a
navigation showed nothing at all until the server answered, and a render
error dropped the user on Next's own screen with no way back.
Tests
- 22 component tests (vitest jsdom project). Two of them found limits of the
environment rather than of the code: jsdom implements neither `inert` nor
scrollIntoView, so the inert test asserts the attribute and the missing
scrollIntoView — which was taking the whole render down from inside an
effect — is stubbed in the setup file.
Reworks the app from a two-role (hr_admin/manager) model to a single
HR-only role gated by profiles.is_active, fixes transfer/promote/karenz/
reorg RPCs to actually defer future-dated changes via a new
pending_org_changes table instead of writing them immediately (applied
by a daily Vercel Cron route), makes reorg undo append-only instead of
deleting history, adds Karenz-return and history-date integrity guards,
deprecates the salary column, and adds explicit schema grants + perf
indexes needed to run against a fresh (non-hosted) Postgres instance.
Adds vitest unit + integration test suites (the latter against a real
local Supabase instance) covering all of the above, plus lint/typecheck/
build wiring (`npm run check`).
Feature requests from live use:
- "Daten aendern" was missing a "Wirksam ab" field (unlike Versetzen/
Befoerdern/Karenz, which all have one) - every change was silently
logged with today's date. Added the field, threaded through
change_employee_data (defaults to today if omitted).
- Staatsbuergerschaft and Wohnland now use a searchable picker
(components/ui/CountryPicker) over the full 193-country UN member
state list (lib/countries.ts) instead of the original ~9/5-value
picklists. Dropped the now-too-narrow CHECK constraints
(supabase/schema_2.sql) since the app is the source of truth for
valid values, same approach used elsewhere for large open-ended
pickers.
Two more real bugs found via live testing of the above (both in
change_employee_data, supabase/functions.sql + functions_4.sql):
1. `text[] || 'literal'` is ambiguous in Postgres - it can resolve to
the array||array overload and try to parse the plain word as array
syntax ('{...}'), failing with "malformed array literal". Hit on
every single field-diff line the moment a user actually changed
something (Staatsbuergerschaft first, then Beschaeftigungsausmass
confirmed the same root cause). Fixed everywhere by switching to the
unambiguous array_append() function.
2. The contract_end_date diff-check cast an empty string straight to
date ("invalid input syntax for type date: ''") instead of using the
same nullif(...,'')::date guard the UPDATE line below it already had.
Verified live end-to-end after both fixes: changed Staatsbuergerschaft
to Brasilien with a backdated effective date, save succeeded, Stammdaten
tab reflects it, and employee_history got the correct event_date
("2026-07-01") and description ("Geänderte Felder: Staatsbürgerschaft,
wirksam ab 2026-07-01"). Reverted the test employee's data back
afterward; seed data is clean again.
