Pages define the default theme's tokens (ADR-024, WS-E task 1): the network-down browser run found --accent undefined on Media with openvibe.network unreachable (Media's styles fell back, shared components did not); baseCss now carries openvibe-shared's DEFAULT_VARS on :root, which the theme loader's per-person values override

ddiff --git a/server/public/page-frame.js b/server/public/page-frame.js
iindex 6b1fcc3..0e4ba01 100644
---- a/server/public/page-frame.js
++++ b/server/public/page-frame.js
@@@ -105,8 +105,19 @@ function headTags(seo) {
  }
  
  /** Page palette on the shared theme tokens (fallback: the default Vibe theme). */
++// The default theme's tokens (openvibe-shared DEFAULT_VARS), so a page paints with them when openvibe.network,
++// where the theme loader lives, cannot be reached (ADR-024). The loader's per-person values, set on <html>,
++// override them.
++const DEFAULT_THEME_CSS = (() => {
++    try {
++        const vars = require('openvibe-shared/builtin-themes').DEFAULT_VARS || {};
++        return Object.entries(vars).filter(([k, v]) => /^--[a-z0-9-]+$/.test(k) && /^[#a-z0-9%.,()\s/+-]+$/i.test(String(v))).map(([k, v]) => `${k}:${v}`).join(';');
++    } catch { return ''; }
++})();
++
  function baseCss() {
      return `
++  ${DEFAULT_THEME_CSS ? `:root { ${DEFAULT_THEME_CSS} }` : ''}
    :root { --bg: var(--bg-primary, #0a0f1c); --panel: var(--bg-card, #131c2e); --line: var(--border, #1f2d47);
            --text: var(--text-primary, #e6edf7); --muted: var(--text-secondary, #96a7c2);
            --link: var(--accent-light, #60a5fa); --acc: var(--accent, #3b82f6); --on-acc: var(--on-accent, #fff); }
ddiff --git a/test/theme-default.test.js b/test/theme-default.test.js
nnew file mode 100644
iindex 0000000..bd02139
---- /dev/null
++++ b/test/theme-default.test.js
@@@ -0,0 +1,15 @@
++'use strict';
++// ADR-024 (WS-E task 1): Media's pages define the default theme's tokens themselves, so they paint with the
++// default theme when openvibe.network (the theme loader) is unreachable. The browser check's --network-down
++// run found --accent undefined here on 2026-09-26 (the styles used fallbacks, shared components did not).
++const assert = require('assert');
++const { baseCss } = require('../server/public/page-frame');
++const { DEFAULT_VARS } = require('openvibe-shared/builtin-themes');
++
++const css = baseCss();
++for (const k of ['--accent', '--bg-primary', '--text-primary']) {
++    assert.ok(DEFAULT_VARS[k], `openvibe-shared has a default ${k}`);
++    assert.ok(css.includes(`${k}:${DEFAULT_VARS[k]}`), `the page defines ${k} as the default theme does`);
++}
++assert.ok(!/url\(|;\s*}/.test(css.split('\n').find((l) => l.includes('--accent:')) || ''), 'only plain token values');
++console.log('theme default: all checks passed');