refactor: use the actual implementation type in optimization.ts instead of hand-copying

Re-export from the source
module so its type stays the single source of truth.

Author: mu-hun

rollup.config.js

@@ -27,5 +27,19 @@ export default {
                 { src: 'src/index.d.ts', dest: 'dist' },
             ],
         }),
+        copy({
+            // 'writeBundle' runs after @rollup/plugin-typescript has flushed its
+            // declaration files to dist/types, so there's something to copy from.
+            // A separate plugin instance (vs. adding this target above, which runs
+            // on the default 'buildEnd' hook) keeps it from firing before the
+            // declarations exist.
+            hook: 'writeBundle',
+            targets: [
+                // src/index.d.ts re-exports from './main/optimization', which must
+                // resolve relative to dist/index.d.ts — mirror the generated
+                // declaration there instead of leaving it under dist/types/src/main.
+                { src: 'dist/types/src/main/optimization.d.ts', dest: 'dist/main' },
+            ],
+        }),
     ],
 };

src/index.d.ts

@@ -64,45 +64,4 @@ export function validateLocales(
     requiredLocales: string[],
 ): void;
 
-/**
- * Manages a local on-disk cache of optimization configuration files.
- */
-export const localOptimizationConfig: {
-    /**
-     * Downloads `percent.json` from the remote server and saves it to `configPath`.
-     * Creates `configPath` if it does not exist.
-     *
-     * @param configPath - Directory where `percent.json` will be written.
-     */
-    downloadPercentJson(configPath: string): Promise<void>;
-
-    /**
-     * Reads the local `percent.json`, downloads any missing `stats.json` files
-     * for each listed filter, and saves them to disk.
-     * Existing `stats.json` files are not overwritten (preserves user edits).
-     *
-     * When `filterIds` is a non-empty array only those filters are processed;
-     * pass an empty array to process all filters listed in `percent.json`.
-     *
-     * @param {string} configPath - Directory containing `percent.json`.
-     * @param {number[]} filterIds - Filter IDs to process; empty array processes all.
-     */
-    downloadStatsFromPercentJson(configPath: string, filterIds: number[]): Promise<void>;
-
-    /**
-     * Configures `getFilterOptimizationConfig` to read stats from local files under
-     * `configPath` instead of fetching from the remote server.
-     * Stats are loaded lazily on demand during compilation.
-     *
-     * @param {string} configPath - Directory containing `percent.json` and
-     *   `filters/<filterId>/stats.json`.
-     */
-    useLocalConfig(configPath: string): void;
-
-    /**
-     * Removes the cache directory and clears in-memory state.
-     *
-     * @param configPath - Directory to remove.
-     */
-    reset(configPath: string): Promise<void>;
-};
+export { localOptimizationConfig } from './main/optimization';