feat(settings): OpenDyslexic font option for dyslexic readers (#507)

* feat(settings): OpenDyslexic font option for dyslexic readers

Next step on the accessibility track. The first pass was on the colour
side — WCAG contrast audits across every theme and dedicated colour-
vision-deficiency variants for the protanopia / deuteranopia / tritan-
opia palettes. Typography is the other axis: some users with dyslexia
find a font with a heavier weighted baseline and asymmetric glyph
shapes (b/d, p/q never mirror, italic forms differentiated rather
than slanted-regular) easier to track than a typical sans.

Adds OpenDyslexic to the existing Fontsource font picker. SIL OFL
licensed, freely redistributable, and the de-facto open-source
standard for this use case. Non-variable axis, ships as four discrete
weight/style files (regular, bold, italic, bold-italic) — the Settings
picker grew an optional `hint` field on font entries so this one row
can carry a "dyslexia-friendly · no RU/ZH support" subtitle without
bloating the other 14 entries.

Latin + Latin-extended only. Cyrillic and CJK locales (RU, ZH) fall
back to the system font when this is selected; the subtitle calls out
that limitation upfront. i18n: hint string in all 8 locales
(settings.fontHintOpenDyslexic).

Accessibility is intentional product positioning here — it's an
underserved corner of the Subsonic-client ecosystem.

* chore(nix): sync npmDepsHash with package-lock.json

* docs: changelog entry for PR #507

Logs the OpenDyslexic font option in v1.46.0 "## Added".

* docs(settings): contributor entry for PR #507

Adds the OpenDyslexic accessibility bullet to Psychotoxical's
contributions list.

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

src/pages/Settings.tsx

@@ -373,6 +373,7 @@ const CONTRIBUTORS = [
       'Home: "Because you listened" recommendation rail — Last.fm-anchored similar-artist surfacing with round-robin anchor rotation per server (PR #489)',
       'Song Info: absolute file path on Navidrome via native /api/song/{id} — Subsonic only ever returned a relative path (or none on Navidrome), the native endpoint surfaces the full server-side location (PR #504)',
       'Home: Lossless Albums rail + dedicated /lossless-albums page with infinite scroll and header parity (selection mode, enqueue, offline, download ZIPs), streaming load via per-fetch onProgress, sidebar entry default visible, detection via Navidrome native bit_depth-sorted song cursor with always-lossless suffix allowlist (PR #506)',
+      'Accessibility: OpenDyslexic font option in the Settings picker — bundled locally via @fontsource/opendyslexic, asymmetric glyph shapes for easier b/d, p/q tracking, Latin-only with translated subtitle in all 8 locales calling out the dyslexia-friendly intent and the Cyrillic/CJK fallback (PR #507)',
     ],
   },
 ] as const;
@@ -3832,6 +3833,7 @@ export default function Settings() {
                     { id: 'jetbrains-mono',    label: 'JetBrains Mono' },
                     { id: 'golos-text',        label: 'Golos Text' },
                     { id: 'unbounded',         label: 'Unbounded' },
+                    { id: 'opendyslexic',      label: 'OpenDyslexic' },
                   ] as { id: FontId; label: string }[]).find(f => f.id === fontStore.font)?.label ?? fontStore.font
                 }</span>
                 <ChevronDown size={14} style={{ color: 'var(--text-muted)', transform: fontPickerOpen ? 'rotate(180deg)' : 'none', transition: 'transform 0.2s' }} />
@@ -3854,15 +3856,25 @@ export default function Settings() {
                       { id: 'jetbrains-mono',    label: 'JetBrains Mono',    stack: "'JetBrains Mono Variable', monospace" },
                       { id: 'golos-text',        label: 'Golos Text',        stack: "'Golos Text Variable', sans-serif" },
                       { id: 'unbounded',         label: 'Unbounded',         stack: "'Unbounded Variable', sans-serif" },
-                    ] as { id: FontId; label: string; stack: string }[]
+                      { id: 'opendyslexic',      label: 'OpenDyslexic',      stack: "'OpenDyslexic', sans-serif", hint: t('settings.fontHintOpenDyslexic') },
+                    ] as { id: FontId; label: string; stack: string; hint?: string }[]
                   ).map(f => (
                     <button
                       key={f.id}
                       className={`btn ${fontStore.font === f.id ? 'btn-primary' : 'btn-ghost'}`}
-                      style={{ justifyContent: 'flex-start', fontFamily: f.stack }}
+                      style={{
+                        justifyContent: 'flex-start',
+                        fontFamily: f.stack,
+                        ...(f.hint ? { flexDirection: 'column', alignItems: 'flex-start', gap: '2px', paddingTop: '8px', paddingBottom: '8px' } : null),
+                      }}
                       onClick={() => { fontStore.setFont(f.id); setFontPickerOpen(false); }}
                     >
-                      {f.label}
+                      <span>{f.label}</span>
+                      {f.hint && (
+                        <span style={{ fontSize: 11, color: 'var(--text-muted)', fontFamily: 'var(--font-sans)' }}>
+                          {f.hint}
+                        </span>
+                      )}
                     </button>
                   ))}
                 </div>