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>

package-lock.json

@@ -22,6 +22,7 @@
         "@fontsource-variable/rubik": "^5.2.8",
         "@fontsource-variable/space-grotesk": "^5.2.10",
         "@fontsource-variable/unbounded": "^5.2.8",
+        "@fontsource/opendyslexic": "^5.2.5",
         "@tanstack/react-virtual": "^3.13.24",
         "@tauri-apps/api": "^2",
         "@tauri-apps/plugin-dialog": "^2.7.1",
@@ -668,6 +669,15 @@
         "url": "https://github.com/sponsors/ayuhito"
       }
     },
+    "node_modules/@fontsource/opendyslexic": {
+      "version": "5.2.5",
+      "resolved": "https://registry.npmjs.org/@fontsource/opendyslexic/-/opendyslexic-5.2.5.tgz",
+      "integrity": "sha512-NNS9aaPQx2TlaTvb3vTEjw3xz8lKj23mBc+6rM00mSNFDygdoll0/nLMHFtDKKrBT6sMfY6TFFPOR0D9ktdspg==",
+      "license": "OFL-1.1",
+      "funding": {
+        "url": "https://github.com/sponsors/ayuhito"
+      }
+    },
     "node_modules/@jridgewell/sourcemap-codec": {
       "version": "1.5.5",
       "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.5.tgz",