Choose a font in Settings, beside the theme (#359)

Kept as the theme is, in a cookie each browser its own, and put on the
page by boot.js before the first frame. Theme's own, the default, adds
no rule, so Modern's Inter, Classic's Lucida Grande and Glass's system
face are as they were. The others are on the device already or served
by ipx (Inter), so choosing one downloads nothing. Their rules are
last in app.css, where they tie with each theme's own body font and win.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/CHANGELOG.md

@@ -11,6 +11,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- A font of your choosing in Settings, beside the theme: Inter, your system's, serif or monospace, kept by each browser as the theme is. Theme's own, the default, keeps each theme's face as it was (#359).
+
 ## [1.3.0] - 2026-10-23
 
 ### Fixed

web/app.css

@@ -1641,3 +1641,11 @@ body:has(#player.on) #status{padding-bottom:3px}
   :root[data-theme="glass"] .ephead{background:var(--bg);-webkit-backdrop-filter:none;backdrop-filter:none}
   :root[data-theme="glass"] #modal{background:rgba(0,0,0,.6)}
 }
+
+/* ---------- A font chosen in Settings (#359) ---------- */
+/* Last in the file: each rule ties with a theme's own body font, and the later one wins. No rule
+   for Theme's own, which leaves each theme as it is. */
+:root[data-font="inter"] body{font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
+:root[data-font="system"] body{font-family:-apple-system,BlinkMacSystemFont,system-ui,"Segoe UI",Roboto,"Noto Sans",sans-serif}
+:root[data-font="serif"] body{font-family:Charter,"Iowan Old Style","Bitstream Charter",Georgia,Cambria,"Noto Serif",serif}
+:root[data-font="mono"] body{font-family:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,"Noto Sans Mono",monospace}

web/boot.js

@@ -1,6 +1,7 @@
-// Runs in <head>, before the first frame (#203): this browser's theme, from its cookie, and
+// Runs in <head>, before the first frame (#203): this browser's theme and font (#359), from their cookies, and
 // whether the last visit here was an admin's, so the link to Admin is there from the start. The
 // server wrote both into the page while it served it; the page is a static file now.
 (()=>{const r=document.documentElement,c=/(?:^|; )ipx_theme=([a-z]{1,20})\.(light|dark|auto)(?:;|$)/.exec(document.cookie);
 if(c){r.dataset.theme=c[1];r.dataset.choice=c[2];if(c[2]!=='auto')r.dataset.mode=c[2];}
+const f=/(?:^|; )ipx_font=([a-z]{1,10})(?:;|$)/.exec(document.cookie);if(f)r.dataset.font=f[1];
 try{if(localStorage.getItem('ipx.admin')==='1')r.dataset.admin='';}catch{}})();

web/src/dialogs.ts

@@ -448,6 +448,9 @@ async function prefsModal(){
       <select id="smode">${Object.entries(MODES).map(([k,t])=>
         `<option value="${k}"${theme.mode===k?' selected':''}>${esc(t)}</option>`).join('')}</select>
       <span class="hint">Auto follows your system's light/dark setting.</span></div>
+    <div class="field"><label for="sfont">Font</label>
+      <select id="sfont">${Object.entries(FONTS).map(([k,t])=>
+        `<option value="${k}"${font===k?' selected':''}>${esc(t)}</option>`).join('')}</select></div>
     <div class="field"><label>DeadAir</label>
       <span class="hint" id="sdeadsaved">${deadSavedText(S.me)}</span></div>
     <div class="field"><label>Subscriptions</label>
@@ -488,6 +491,7 @@ async function prefsModal(){
     <div class="field"><span class="hint" id="sversion">${S.me?`iPX ${esc(S.me.version)}, page __WEB_VERSION__`:''}</span></div>`);
   $<HTMLSelectElement>('#stheme').onchange=(e: Event)=>setTheme((e.target as HTMLSelectElement).value,undefined,true);
   $<HTMLSelectElement>('#smode').onchange=(e: Event)=>setTheme(undefined,(e.target as HTMLSelectElement).value,true);
+  $<HTMLSelectElement>('#sfont').onchange=(e: Event)=>setFont((e.target as HTMLSelectElement).value,true);
   $<HTMLButtonElement>('#gopml').onclick=opmlModal;
   drawTokens();
   $<HTMLButtonElement>('#tokadd').onclick=async()=>{

web/src/theme.ts

@@ -52,6 +52,21 @@ function setTheme(name = theme.name, mode = theme.mode, save = false){
 function saveTheme(){
   document.cookie = `ipx_theme=${theme.name}.${theme.mode}; Path=/; Max-Age=31536000; SameSite=Lax`;
 }
+// A font chosen in Settings, kept as the theme is, each browser its own (#359). Theme's own is
+// what each theme sets, Lucida Grande for Classic and the system's for Glass; the rest are on the
+// device already or served by ipx, so choosing one downloads nothing.
+const FONTS: Record<string, string> = {theme: "Theme's own", inter: 'Inter', system: 'System', serif: 'Serif', mono: 'Monospace'};
+let font = 'theme';
+
+function setFont(name = font, save = false){
+  font = FONTS[name] ? name : 'theme';
+  const root = document.documentElement;
+  if(font === 'theme') delete root.dataset.font; else root.dataset.font = font;
+  const sel = $<HTMLSelectElement>('#sfont'); if(sel) sel.value = font;
+  if(save) document.cookie = `ipx_font=${font}; Path=/; Max-Age=31536000; SameSite=Lax`;
+}
+setFont(document.documentElement.dataset.font);
+
 systemDark?.addEventListener?.('change', () => { if(theme.mode === 'auto') setTheme(); });
 (() => {
   const root = document.documentElement;