SQLite performance (Database::__construct):
- PRAGMA journal_mode = WAL: eliminates full-DB read locks on write, safe
for concurrent PHP-FPM workers
- PRAGMA synchronous = NORMAL: durable on commit without full fsync per write
- PRAGMA cache_size = -8000: ~8 MB page cache per connection
Accessibility foundation (WCAG 2.1 AA):
- common.css: add .sr-only utility, .skip-link (hidden until focused),
global :focus-visible (2px purple outline, 2px offset),
prefers-reduced-motion guard; remove bare outline:none from
.site-search__input
- admin.css: same :focus-visible, skip-link, and motion guard scoped to
admin purple; remove outline:none from .admin-input/.admin-select/
.admin-textarea and .admin-filters select (both had :focus border rules
already, so focus is still visually communicated)
- search.css: remove outline:none from .search-filter-select (already has
:focus border-color rule)
- All 5 public pages (index, search, tfe, apropos, licence): add
<a href="#main-content" class="skip-link"> as first child of <body>;
add id="main-content" to <main>
- templates/admin/head.php: same skip link; aria-label="Navigation admin"
on <nav>; id="main-content" on all 10 admin <main> elements
All 4 test suites pass (unit, integration, security, rate-limit).
- Flat purple-gradient nav bar with POSTERG/RÉPERTOIRE/À PROPOS links
- Full-width search bar with icon, bottom-border only, below nav
- Home: white bg, media card grid (thumbnail + author/title label below)
- Répertoire: 4-column index (Années/Catégories/Étudiantes/Mots-clés)
- TFE: 2-column layout (large text left, media right)
- À Propos: 2-column, large monospace text, new apropos.php page
- Admin: dark theme (#1a1a1a), purple gradient nav, bottom-border inputs
- New shared partials: templates/nav.php, templates/search-bar.php
- Rewrote all CSS: common, main, search, tfe, apropos, admin
