/**
 * Client-side `{var}` interpolation (i18n, Sweep S13 #1418).
 *
 * A small, dependency-free copy of `@happyvertical/smrt-languages`'s
 * `renderTemplate`. The client deliberately does NOT import the languages
 * package: it is an optional peer with a heavy server dependency tree
 * (smrt-core, sql, ai, jobs…), and importing it from the always-bundled client
 * path (`Provider` → `/i18n`) would force every smrt-svelte consumer — including
 * downstream SvelteKit apps — to install that tree. The contract is tiny and
 * stable, so the client owns it; `__tests__/render-parity.spec.ts` pins it
 * against the canonical languages implementation so the two never drift.
 */
/** Variables substituted into `{var}` placeholders. */
export type LanguageVariables = Record<string, unknown>;
/**
 * Render `{var}` placeholders against the supplied variables. Matches the
 * languages resolver's contract: `Date` → ISO string, array/object → JSON,
 * `null` / `undefined` → empty string; an empty/absent `variables` returns the
 * template unchanged (fast path).
 */
export declare function renderTemplate(template: string, variables?: LanguageVariables): string;
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