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/help.js

@@ -0,0 +1,19 @@
+export function registerHelpCommand(program, ctx) {
+    program
+        .command('help [command]')
+        .description('Show help for a command')
+        .action((commandName) => {
+        if (!commandName) {
+            program.outputHelp();
+            return;
+        }
+        const cmd = program.commands.find((c) => c.name() === commandName);
+        if (!cmd) {
+            console.error(`${ctx.p('err')}Unknown command: ${commandName}`);
+            process.exitCode = 2;
+            return;
+        }
+        cmd.outputHelp();
+    });
+}
+//# sourceMappingURL=help.js.map