Merge PR #48: feat: add Xiaohongshu source + Reddit public fallback

- Xiaohongshu search via local MCP service (opt-in, zero impact if service not running)
- Reddit public JSON fallback (works with zero API keys)
- Reddit priority: ScrapeCreators -> OpenAI -> public fallback
- Updated env.py: Reddit always available via public fallback

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

vendor/package/dist/commands/check.d.ts

@@ -0,0 +1,4 @@
+import type { Command } from 'commander';
+import type { CliContext } from '../cli/shared.js';
+export declare function registerCheckCommand(program: Command, ctx: CliContext): void;
+//# sourceMappingURL=check.d.ts.map