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perf+a11y: WAL mode for SQLite, skip links, :focus-visible, .sr-only

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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).
This commit is contained in:
Pontoporeia
2026-03-27 13:45:01 +01:00
parent a9877b1d1d
commit 42af4644c5
23 changed files with 128 additions and 45 deletions
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5
src/Database.php
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@@ -24,8 +24,11 @@ class Database {
$this->pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$this->pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
// Enable foreign key constraints
// Enable foreign key constraints + performance pragmas
$this->pdo->exec('PRAGMA foreign_keys = ON');
$this->pdo->exec('PRAGMA journal_mode = WAL');
$this->pdo->exec('PRAGMA synchronous = NORMAL');
$this->pdo->exec('PRAGMA cache_size = -8000');
} catch (PDOException $e) {
error_log("Database connection failed: " . $e->getMessage());
throw new Exception("Impossible de se connecter à la base de données.");