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webui: add custom CSS injection via config #23904

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Merged
allozaur merged 6 commits into from
May 30, 2026
Merged

webui: add custom CSS injection via config #23904

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f6d77bf
webui: add custom CSS injection via config
ServeurpersoCom May 30, 2026
1281b5d
ui: address review from @niutech and @allozaur, rename custom JSON ke…
ServeurpersoCom May 30, 2026
8d66de4
ui: address review from @allozaur, move custom CSS injection to a sty…
ServeurpersoCom May 30, 2026
42f6ae0
ui: inject custom CSS through a svelte action instead of a bound element
ServeurpersoCom May 30, 2026
dc929ed
Update tools/ui/src/lib/constants/settings-keys.ts
ServeurpersoCom May 30, 2026
67a1159
ui: address review from @allozaur, rename custom config key to custom…
ServeurpersoCom May 30, 2026
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3 changes: 2 additions & 1 deletion tools/ui/src/lib/constants/settings-keys.ts
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Expand Up @@ -66,5 +66,6 @@ export const SETTINGS_KEYS = {
EXCLUDE_REASONING_FROM_CONTEXT: 'excludeReasoningFromContext',
SHOW_RAW_OUTPUT_SWITCH: 'showRawOutputSwitch',
// PY_INTERPRETER_ENABLED: 'pyInterpreterEnabled',
CUSTOM: 'custom'
CUSTOM: 'custom',
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CUSTOM_CSS: 'customCSS'
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} as const;
12 changes: 12 additions & 0 deletions tools/ui/src/lib/constants/settings-registry.ts
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Expand Up @@ -665,6 +665,18 @@ const SETTINGS_REGISTRY: Record<string, SettingsSectionEntry> = {
defaultValue: '',
type: SettingsFieldType.TEXTAREA,
section: SETTINGS_SECTION_SLUGS.DEVELOPER
},
{
key: SETTINGS_KEYS.CUSTOM_CSS,
label: 'Custom CSS',
help: 'CSS injected into the page at runtime. Set it here, or ship it server side via the --ui-config customCSS field.',
defaultValue: '',
type: SettingsFieldType.TEXTAREA,
section: SETTINGS_SECTION_SLUGS.DEVELOPER,
sync: {
serverKey: SETTINGS_KEYS.CUSTOM_CSS,
paramType: SyncableParameterType.STRING
}
}
]
},
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17 changes: 17 additions & 0 deletions tools/ui/src/routes/+layout.svelte
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Expand Up @@ -169,6 +169,23 @@
}
});

// Inject custom CSS at runtime, reactive on the customCSS setting
$effect(() => {
if (!browser) return;

const css = (config().customCSS as string | undefined) ?? '';

let style = document.getElementById('llama-custom-css') as HTMLStyleElement | null;

if (!style) {
style = document.createElement('style');
style.id = 'llama-custom-css';
document.head.appendChild(style);
}

style.textContent = css;
});
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// Fetch router models when in router mode (for status and modalities)
// Wait for models to be loaded first, run only once
let routerModelsFetched = false;
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