refactor(core): enhance thinking message handling with sleep function…

…ality

- Added a sleep function to introduce a delay before sending thinking messages, improving user experience by preventing immediate responses.
- Adjusted the timeout handling logic to ensure proper management of thinking message timeouts, enhancing the overall flow of message processing.
- These changes aim to refine the interaction timing within the chat service, making it more responsive and user-friendly.

packages/core/src/middlewares/thinking_message_send.ts

@@ -1,4 +1,4 @@
-import { Context, Logger } from 'koishi'
+import { Context, Logger, sleep } from 'koishi'
 import { Config } from '../config'
 import {
     ChainMiddlewareContextOptions,
@@ -26,6 +26,9 @@ export function apply(ctx: Context, config: Config, chain: ChatChain) {
                     context.options
                 )
 
+                // sleep to wait think
+                await sleep(config.sendThinkingMessageTimeout)
+
                 if (thinkingTimeoutObject.timeout == null || queueCount < 1) {
                     return
                 }
@@ -56,7 +59,7 @@ export function apply(ctx: Context, config: Config, chain: ChatChain) {
                     },
                     1000 * 60 * 2 - 1000 * 3
                 )
-            }, config.sendThinkingMessageTimeout)
+            }, 0)
 
             return ChainMiddlewareRunStatus.CONTINUE
         })