feat: add Web WC error message prompt for ID 3 (fixes #113)

CHANGES.rst

@@ -19,6 +19,7 @@ Added
 - Remove log in session file before reauth attempts if the file is older than 5 minutes.
 - Add support to App Message type 4
 - Avoid including repetitive quotations (`#122`_)
+- Add Web WC error message prompt for ID 3 (`#113`_)
 
 Changed
 -------
@@ -114,3 +115,4 @@ First release.
 .. _2.0.5: https://ews.1a23.studio/compare/v2.0.4...v2.0.5
 .. _#108: https://github.com/ehForwarderBot/efb-wechat-slave/issues/108
 .. _#122: https://github.com/ehForwarderBot/efb-wechat-slave/issues/122
+.. _#123: https://github.com/ehForwarderBot/efb-wechat-slave/issues/123

efb_wechat_slave/__init__.py

@@ -770,6 +770,9 @@ def substitute_known_error_reason(self, err: wxpy.ResponseError) -> wxpy.Respons
             elif err.err_code == 1205:
                 err.err_msg = self._("You might have sent your messages too fast. Please try to slow down "
                                      "and retry after a while.")
+            elif err.err_code == 3:
+                err.err_msg = self._("Your mobile WeChat client is offline for too long. Please ensure your mobile"
+                                     "WeChat client is always online.")
             else:
                 err.err_msg = self._("This is an unknown error from Web WeChat which we know nothing about why this "
                                      "is happening. If you have seen a pattern or if you happen to know the reason "

efb_wechat_slave/__version__.py

@@ -1,3 +1,3 @@
 # coding: utf-8
 
-__version__ = "2.0.6.dev7"
+__version__ = "2.0.6.dev8"