Reduce build logging

The build output is very verbose with many warnings. Add a way to toggle detailed logging.

Current Warnings

• Svelte a11y warnings (media captions, click handlers, etc.)
• State referenced locally warnings
• Missing anchor ID warnings from prerender
• CSS syntax warnings
• Component naming warnings

Solution

Options to reduce logging:

• Add onwarn handler in svelte.config.js to filter warnings
• Use environment variable like VERBOSE=1 pnpm build to toggle
• Configure handleMissingId: 'ignore' in SvelteKit config for anchor warnings
• Set compilerOptions.warningFilter in svelte.config.js

Example

// svelte.config.js
const config = {
    onwarn: (warning, handler) => {
        if (process.env.VERBOSE) {
            handler(warning);
        } else if (warning.code === 'a11y_media_has_caption') return;
        else if (warning.code === 'state_referenced_locally') return;
        else handler(warning);
    }
};